FOR DRILLING TWO EXPLORATORY WELLS - Welcome...

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PRE-FEASIBILITY REPORT

FOR DRILLING TWO EXPLORATORY

WELLS

CHAR & CHAQ

IN CHARALI MINING LEASE

SIVASAGAR DISTRICT, ASSAM

NORTH ASSAM SHELF A&AA BASIN ONGC, JORHAT

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Pre-feasibility Report of Drilling of Two Exploratory

Wells in CHARALI ML, Sivasagar District, Assam

1. Introduction

Charali Mining Lease (ML) is one of the important oil producing fields of ONGC situated in Sivasagar District of Assam. The area of this lease is 51.63 square kilometers. This ML area forms the part of North Assam shelf and had been producing hydrocarbons for more than three decades from Barails and Tipams. A 20 years ML was obtained with effect from 20.03.1999 (Ref: MOPNG, Govt. of India, Letter No. O-12012/94/2002-ONG/D-IV, dated 29 th April-2002) and is valid upto 19.03.2019. So far, 46 numbers of wells (including exploratory wells and development wells) have been drilled in this field with depths ranging from 2400m to as deep as 4000m.

Geological Setting of the ML;

The general geology of the area is well known from subsurface and outcrop data. The stratigraphic column consists of Archean metamorphic Basement overlain by Jaintia Group of Paleocene to Eocene age consisting of Tura, Sylhet and Kopili formations. The Jaintia Group is overlain by the Barail Group of sediments consisting of Disangmukh, Demulgaon and Rudrasagar formations of Eocene to Oligocene age and underlain by Tipam Group of Miocene to Pliocene age consisting of Geleki sandstone, Lakwa Sandstone, Girujan clay and Nazira Sandstone. Moran Group of younger sediments of Plio-Pleistocene to Recent age, comprising of Namsang, Dhekiajuli formations and Alluvium overlies the Tipam Group.

The Charali structure can be described as an anticlinal fault closure developed on a predominantly NNE-SSW trending fault, termed the Charali Western Bounding Fault that extends from the north of Changmaigaon field and northward upto the Rudrasagar Field. Reservoirs in different stratigraphic levels starting from various sand units of Barail Group (BMS, BCS-I, BCS-V, BCS-VA) to sands within Tipam Group (TS-5, TS-4, TS-2 & TS-1) have been charged in different part of the ML depending on favorable entrapment conditions. Shales/Claystones of within these formations and clays in Girujan & Namsang have acted as cap rock facies.

Based on evaluation of G & G data of the ML the following locations have been identified for drilling exploratory wells.

1.) CHAR and 2.) CHAQ

1.2 Technical Justification for Released Locations for Exploratory Drilling

1.) CHAR:

The location CHAR is mapped as a fault closure at LCM and Tipam (TS-5) and BMS levels. G&G studies carried out suggests possible presence of hydrocarbons in Tipam Formations (TS-4, TS-5 & BMS pays) & Barail Group. The location is to be drilled to a depth of 3550 m (Measured depth) and is techno-economically viable. The details of the location are given below.

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Sl

No

Prospect Proposed

Well

Location

PEL-ML Category TD (m)

MD

Loc. Reference

Latitude / Longitude

Objective

1 CHARALI CHAR CHARALI -ML

Expl. B-cat. 3550

Lat: 260 57’50.47”N Long: 940 40’46.88”E

TS-4 ,TS-5 & BMS Pays

Spheroid: WGS-84, Projection System: Lambert Conical Single Parallel

2.) CHAQ:

The location CHAQ is mapped as a fault closure at LCM and Tipam (TS-5) levels. G&G studies carried out suggests possible presence of hydrocarbons in Tipam Formations (TS-4 & TS-5 pays) & Barail Group. The location is to be drilled to a depth of 3150 m (Measured depth) and is techno-economically viable. The details of the location are given below.

Sl

No

Prospect Proposed

Well

Location

PEL-ML Category TD (m)

MD

Loc. Reference

Latitude / Longitude

Objective

2 CHARALI CHAQ CHARALI -ML

Expl. B-cat. 3150

Lat: 260 56’12.73’’N Long: 940 41’11.13’’E

TS-4 & TS-5 Pays


The locations CHAR and CHAQ have been firmed up to oil exploration and are likely to accrete inplace hydrocarbons to the tune of about 2.53 MMT. This will result in increase of hydrocarbon production and further improvement of the country’s economy. The locations are techno-economically viable.

2.0 Details of proposed Drilling Activity

ONGC owned electrical type E-2000 series Rigs (BHEL Rig), which has a capacity to drill to the depth of 6000m is likely to be deployed for undertaking drilling in the block. The technical details of the proposed drilling activities are given below:

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Well location / Depth CHAR

(TargetDepth:3550 meter MD) CHAQ (Target Depth: 3150meter MD)

No of wells to be drilled One One

Duration of drilling 6-7 months 6-7 months

Qty of drilling fluid cu.m 900 m3 900 m3

Qty. of cuttings, cu.m Appox. 230-300m3 Appox. 220-300m3

Qty. of drlg. Waste water, cu.m

1400 m3 1400 m3

Location details Latitude: 27°02’49.40”N Longitude: 94°50’50.73”E

Latitude: 260 56’12.73’’N Longitude: 940 41’11.13’’E

Distance of block boundary from coastline

Onland location Onland location

Development plan in case of strike

To be chalked out after hydrocarbon strike


HC reserve (initially in place) 1.41 MMT 1.12 MMT

Formation pressure Hydrostatic Hydrostatic

Test flaring, duration 2 to 3 days, Flare details: Confined to the oil pit. 2 to 3 days, Flare details: Confined to the oil pit.

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2.1 Details of the drilling rig proposed to be deployed Type of rig Electrical rig Drilling mud composition Water based drilling fluid Power generator type and no’s AC-SCR type. Four numbers. Diesel consumption 200 litres/hour Qty. of fresh water requirement & source 2000m3. Transported from nearby source

Through contractor. Manpower on rig 30 person / 12 hrs shift Material requirement & Mobilization From ONGC base, Sivsagar Details of solids handling system Shale shakers- 1200 GPM capacity

Desander- 1200 GPM capacity Desilter-1200 GPM capacity

Details of sewage treatment facility, if any Not applicable Waste pit availability & size 30m X 20m X 1.5m

30m X 20m X 1.5m 40m X 30m X 1.5m

Oil pit availability & size 25m x 10m x 1m 2.2 Drilling Operations

Only water based drilling mud will be used. The quantity of drill cuttings generated will be around 200-300 m3. The quantity of wastewater produced will be about 15 m3/day. The rig will be provided with solids handling system comprising Shale shakers (1200 GPM), de-sander (1200 GPM) and de-silter (1200 GPM) and Degasser with vacuum pump.

Drilling operations will be carried out using an electrical type drilling unit (Drilling Rig) for drilling of oil and gas wells. It consists of a derrick, at the top of which there is a crown block and a hoisting block fitted with a hook. From the hook a swivel a Kelly stem is suspended passing through a square or hexagonal Kelly bush which fits into the rotary table. The rotary table receives the power from an electric motor. The electric motor rotates the rotary table which passes through the Kelly bush and the rotations are transmitted to the bit as the drilling progresses, the drill pipe in singles are added to continue the drilling process. At the end of the bit life, the drill pipes are pulled out in stands and stacked on the derrick platform. A stand normally has 3 single drill pipes. After changing the bit, the drill string is run back into the hole and further drilling is continued. This process continues till the target depth is reached.

During the course of drilling, cuttings are generated due to crushing action of the bit. These cuttings are removed by flushing the well with duplex/triplex mud pumps. The mud from the pump discharge through the rotary hose connected to stationary part of the swivel, the drill string and bit nozzles. The mud coming out of the bit nozzles pushes the cuttings up hole and transports them to the surface through the annular space between the drill string and the hole. The mud not only carries away crushed rock from the bottom of the hole but it also cools the bit as it gets heated due to friction with formation while rotating. The mud also helps in balancing subsurface formation pressures and by forming a cake on the walls of the well diminishes the possibility of crumbling or caving of the well bore.

At the surface, the mud coming out from well along with the cuttings falls in a trough, passes through the solids control equipments i.e. shale shaker, de-sander and de-silter. These

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equipments remove the solids of different sizes which get mixed with the mud during the course of drilling. The cleaned mud flows back to the suction tanks to be again pumped into the well. The drilling mud/fluid circulation is thus a continuous cyclic operation. The most suitable clay for mud preparation is bentonite which is capable of forming highly dispersed colloidal solutions. Various other chemicals are also used in mud preparation as per requirements dictated by the temperature/pressure conditions of the wells. The mud is continuously tested for its density, viscosity, yield point, water loss, pH value etc. to ensure that the drilling operations can be sustained without any down hole complications. 2.3 Drilling Facilities

Drilling is a temporary activity which will continue for about 6-7 months for each well in the block. The rigs are self-contained for all routine jobs. Once the drilling operations are completed, and if sufficient indications of hydrocarbons are noticed while drilling, the well is tested by perforation in the production casing. This normally takes 2-3 days. If the well is found to be successful hydrocarbon bearing, it is sealed off for future development. If no commercial hydrocarbon is struck, the well is abandoned according to existing safety norms. 2.4 General Requirements of Drilling

Exploratory drilling programme requires the following common facilities: a. Drilling muds

Drilling of wells requires specially formulated muds which basically comprise inert earth materials like bentonite, barite in water with several additives to give mud weight, fluidity and filter cake characteristics while drilling. The drilling muds have several functions like lubrication and cooling of the drill bit, balancing subsurface formation, bringing out the drill cuttings from the well bore, thixotropic property to hold cuttings during non-operations, formation of thin cake to prevent liquid loss along well bore etc. Several additives are mixed into the mud system to give the required properties. Water based mud will be used to the possible extent in exploratory drilling but use of synthetic based mud may require due to complexities associated with the geological formations and associated hole stability problems. The constituents of water based mud (WBM) are given in Table 1.2. The special additives and their functions in WBM are shown in Table 1.3. b. Power Generation

The drilling process requires rotation of drill bit through the draw works which require power. The power requirement of the drilling rig will be met by using the four diesel generator sets with a diesel consumption of about 4.8 Kl / day. The exhaust stacks of the DG sets are likely to vent the emissions. c. Water requirements

The water requirement in a drilling rig is mainly meant for preparation of drilling mud apart from washings and domestic use. While the former consumes the majority of water requirement, the water requirement for domestic and wash use is very less. The daily water

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consumption will be 25 m3/d of which 15m3/d will be used for mud preparation and 10m3/d will be used for domestic purposes including drinking. d. Domestic wastewater

The operating personnel in the drilling rigs will operate mostly from nearby ONGC colonies. However suitable soak pits will be available at the drilling site. e. Solids removal

The rock cuttings and fragments of shale, sand and silt associated with the return drilling fluid during well drilling will be separated using shale shakers and other solids removal equipment like de-sanders and de-silters. The recovered mud will be reused while the rejected solids will be collected and discharged into the waste pit. f. Drill cuttings and waste residual muds

During drilling operations, approx. 400-525 m3 per well of wet drill cuttings are expected to be generated from each well depending on the type of formation and depth of drilling. In addition to the cuttings 15-20 m3/day of wastewater is likely to be generated during well drilling. The waste residual muds and drill cuttings which contain clay, sand etc. will be disposed into the waste pit. g. Testing

Testing facilities will be available at drilling rig for separation of liquid phase and burning of all hydrocarbons during testing. The test flare boom will be located at a distance from the drilling rig.

h. Chemical storage

The drilling rig will have normal storage facilities for fuel oil, required chemicals and the necessary tubulars and equipment. The storage places will be clearly marked with safe operating facilities and practices. i. Manpower

The drilling rig will be operated by approx. 30 persons on the rig at anytime. The manpower will operate in two shifts with continuous operations on the rig. j. Logistics

Crew transfers to and from the drilling rig, materials, diesel and chemicals will be through light vehicles, trucks and trailers.

3.0 Investment anticipated

The anticipated cost of drilling of wells (which includes the PEL fees, EIA study, stacking of the location, land acquisition, site preparation and drilling activity has been tabulated below.

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S.No Name of the locations Investment anticipated

1 CHAR Rs. 40 crores

2 CHAQ Rs. 40 crores

3.1 Justification for Environmental Clearance

Charali ML is highly prospective where oil and gas have been discovered and produced from a large stratigraphic column ranging from Barail Group to Girujan Formation. However there are areas within the ML which still have untapped hydrocarbons. These locations are proposed for these exploiting these pools.

In view of the above it is proposed to grant the environmental clearance at the earliest so that the drilling commitments as well post drilling evaluations could be carried out. The total area proposed for environmental clearance amounting to 51.63 Sq Km is shown in the map enclosed at Fig 1.1

The coordinates of the area proposed for environmental clearance are as follows:

SL. NO.

ML NAME (AREA )

BOUNDARY POINTS

LATITUDE LONGITUDE DEG. MIN. SEC. DEG. MIN. SEC.

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CHARALI ML (Area: 51.63 Sq. Km.)

A 26 56 19.90 94 39 35.68 B 26 56 22.50 94 39 40.86 C 26 58 31.00 94 39 38.86 D 26 59 03.57 94 43 22.83 E 26 56 47.00 94 43 26.45 F 26 53 27.46 94 40 41.61 G 26 53 10.28 94 38 08.36

Table 1.2: Ingredients of water based drilling fluid

Sl. No Chemicals

1. Barite

2. Bentonite

3. Carboxyl Methyl Cellulose

4. Mud thinner / Conditioner

5. Resinated Lignite

6. Non weighted spotting fluid

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7. Weighted spotting fluid

8. EP lube

9. Drilling detergent

10. Caustic soda

11. Potassium Chloride

12. Soda ash

Table 1.3: Special Additives and Their Functions in Water Based Drilling Fluids

Sl. No Discharge Category Exploration

1. Sodium Bicarbonate Eliminates excess calcium ions due to cement contamination

2. Sodium chloride Minimize borehole washout in salt zone

3. Groundnut shells, mica of

cellophane

Minimize the loss of drilling mud to formation

4. Cellulose polymers or starch Counter thick, sticky filter cake, control

filtration loss to formation

5. Aluminum stearate Minimize foaming.

6. Vegetable oil lubricant Reduce torque and drag on drill string.

7. Pill of oil based mud spotting

fluid

Counter differential pressure sticking of string. Pill is placed down hole opposite contact zone to

free pipe.

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APPENDIX-I

(See paragraph – 6)

FORM 1

I Basic Information:

Serial

No.

Item Detail

1. Name of the project/s Drilling of two exploratory wells in Charali ML area, Sivasagar District, Assam.

MOPNG, Govt of India, Award of ML Letter No. O-12012/94/2002-ONG/D-IV, dated 29 th April-2002

2. S. No in the Schedule

3. Proposed Capacity/ area/length/ tonnage to be handled/ command area/ lease area/ number of wells to be drilled

Sl. no.

Name of location

Target Depth

(meters)

District

1. CHAQ 3150m Sivasagar

2. CHAR 3550m Sivasagar

4. New/Expansion/ Modernization New

5. Existing capacity/Area etc. yet to be acquired

6. Category of Project i.e. ‘A’ or ‘B’ ‘A’

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7. Does it attract the general condition? If yes, please specify.

No

8. Does it attract the specific condition? If yes, please specify.

No

9. Location 1.) CHAQ

Plot/Survey/Khasra No Surface Co-ordinates: Latitude: 260 56’12.73’’N Longitude: 940 41’11.13’’E

Village/Area Mothiasiga, Mouza - Juktoli, Sivasagar.

Tehsil Revenue Circle:- Nazira

District Sivasagar

State Assam

Nearest railway station/airport along with distance in kms.

Sivasagar Town railway station in Assam approximately 5.5 km, Jorhat Airport (Assam) is at a distance of approximately 65km.

Nearest Town, city, District Headquarters along with distance in kms.

Sivasagar Town, District: Sivasagar, Assam, Approximately 5.5km.

Village Panchayats, Zilla Parishad, Municipal Corporation, Local body (Complete postal addresses with telephone nos. to be given

Village Panchayat – Juktoli , ZP – Juktoli, P.O.-Rajmao PIN- 785685

Ph. No: 9435743568

Location 2.) CHAR

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Plot/Survey/Khasra No Surface Co-ordinates: Latitude: 260 57’51.849”N Longitude: 940 40’23.018”E

Village/Area Village – Kurulakatia

Mouza –Meteka, Bongaon ,Sivasagar, Assam

Tehsil Revenue Circle – Sivasagar

District Sivasagar.

State Assam


Sivasagar Town railway station in Assam approximately 7 km, Jorhat Airport (Assam) is at a distance of approximately 65km.


Sivasagar Town, District: Sivasagar, Assam, Approximately 7 km.

Village Panchayats, Zilla Parishad, Municipal Corporation, Local body (Complete postal addresses with telephone nos. to be given)

Village Panchayat – Rongpur, ZP – Rongpur, P.O. –Sivasagar, Pin.-785640

Ph No. 9435516696

10. Name of the applicant ONGC LTD

11. Registered Address ONGC LTD, Jeevan Bharti, Tower-II, 124-Indira Chowk, New Delhi-110001

12. Address for correspondence Office of The Basin Manager, Luit Bhawan, ONGC, Cinnamara

Complex, Cinnamara, Jorhat-785704, Assam

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Name C. Mahapatra

Designation Basin Manager

Address Luit Bhavan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704, Assam

Pin Code 785704

E-mail [email protected]

Telephone No. 0376-2360012

Fax No 0376-2360012

13. Details of Alternative Sites Examined, if any location of these sites should be shown on topo sheet.

N/A

14. Interlinked Project No

15. Whether separate application for interlinked project has been submitted?

N/A

16. If yes, date of submission N/A

17. If no, reason N/A

18. Whether the proposal involves approval/ clearance under: if yes, details of same and their status to be given.

(a) The Forest(Conservation) Act, 1980 (b) The Wildlife (Protection) Act,1972

Yes. The Forest clearance (Conservation) Act, 1980 will be taken as per norms.

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(c) The C.R.Z Notification

19. Whether there is any Government Order/Policy

relevant/relating to the site No

20. Forest land involved No

21. Whether there is any litigation pending against the project and/or land in which the project is proposed to set up?

(a) Name of the Court (b) Case No (c) Orders/ directions of the Court, if any and its

relevance with the project

None

II Activity 1. Construction, operation or decommissioning of the Project involving actions, which will cause physical changes in the locality (topography, land use, changes in water bodies, etc.)

Sl. No.

Information/Checklist confirmation Yes/No Details thereof (with approximate quantities / rates, wherever possible) with source of information data

1.1 Permanent or temporary change in land use, land cover or topography including increase in intensity of land use (with respect to local land use plan)

Temporary Temporary change in land use

1.2 Clearance of existing land, vegetation and buildings?

Yes Site leveling and fencing

1.3 Creation of new land uses? No n.a

1.4 Pre-construction investigations e.g. bore houses, soil testing?

No Hard field area. Normally soil testing not essential for shallow / temporary foundation for deployment of rig.

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1.5 Construction works? Yes Foundation for drilling rig deployment. Surface hardening and chemical shed.

1.6 Demolition works? No n.a

1.7 Temporary sites used for construction works or housing of construction workers?

Yes Temporary sheds will be constructed

1.8 Above ground buildings, structures or earthworks including linear structures, cut and fill or excavations

Yes Temporary sheds of working staff during shift duties.

1.9 Underground works including mining or tunneling?

Yes Drilling will ranges from 3000 m up to 4000 m depth (Tentative).

1.10 Reclamation works? Yes Site will be restored after completion of well

1.11 Dredging? No Onland project

1.12 Offshore structures? No Onland project

1.13 Production and manufacturing processes?

No n.a

1.14 Facilities for storage of goods or materials?

Yes Mechanical and drilling spares and drilling chemicals in temporary sheds.

1.15 Facilities for treatment or disposal of solid waste or liquid effluents?

Yes Solid waste / drilled rock cuttings and liquid waste will be confined within the waste pit lined with impervious HDPE lining

1.16 Facilities for long term housing of operational workers?

No Rig workers are operating on daily or 14 days on/off pattern from their respective hometowns.

1.17 New road, rail or sea traffic during construction or operation?

No n.a

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1.18 New road, rail, air waterborne or other transport infrastructure including new or altered routes and stations, ports, airports etc?

Yes

Approach road envisaged be approx. 1 km from the existing public road network.

1.19 Closure or diversion of existing transport routes or infrastructure leading to changes in traffic movements?

No

n.a

1.20 New or diverted transmission lines or pipelines?

No

n.a

1.21 Impoundment, damming, culverting, realignment or other changes to the hydrology of watercourses or aquifers?

No n.a

1.22 Stream crossings? No n.a

1.23 Abstraction or transfers of water form ground or surface waters?

Yes Surface water / Bore wells as per requirement.

1.24 Changes in water bodies or the land surface affecting drainage or run-off?

No n.a

1.25 Transport of personnel or materials for construction, operation or decommissioning?

Yes Rig personnel to operate from the temporary drill site accommodation (bunk houses).

1.26 Long-term dismantling or decommissioning or restoration works?

No n.a

1.27 Ongoing activity during decommissioning which could have an impact on the environment?

No n.a

1.28 Influx of people to an area in either temporarily or permanently?

No n.a

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1.29 Introduction of alien species? No n.a

1.30 Loss of native species or genetic diversity?

No n.a

1.31 Any other actions? Nil n.a

2. Use of Natural resources for construction or operation of the Project (such as land, water, materials or energy, especially any resources which are

non-renewable or in short supply):

Sl. No. Information / checklist confirmation Yes / No Details thereof (with approximate quantities /rates, wherever possible) with source of information data

2.1 Land especially undeveloped or agricultural land (ha)

yes 100m x100m, agricultural land.

2.2 Water (expected source & competing users) unit: KLD

Yes 20-25 M3 / day for Drilling and domestic purpose

2.3 Minerals (MT) Nil n.a

2.4 Construction material – stone, aggregates, and / soil (expected source – MT)

Yes Sand / Stone / Cement 100 Tonnes from nearby dealers

2.5

Forests and timber (source – MT) No n.a

2.6 Energy including electricity and fuels (source, competing users) Unit: fuel (MT), energy (MW)

Yes 6 KL./day (Diesel for running captive Gensets) - Drilling rigs

2.7 Any other natural resources (use appropriate standard units)

No n.a

3. Use, storage, transport, handling or production of substances or materials, which could be harmful to human health or the environment or raise

concerns about actual or perceived risks to human health.

Sl. No. Information/Checklist confirmation Yes / No Details thereof (with approximate quantities/rates, wherever possible) with source of information data

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3.1 Use of substances or materials, which are hazardous (as per MSIHC rules) to human health or the environment (flora, fauna, and water supplies)

No Only water based mud will be used, which contains no hazardous raw material, however drilling will produce- 1. Drilling cuttings of 225-300 m3 2. Effluent/ waste water 900m3

3. ETP/ only sludge 15-20 ton

3.2 Changes in occurrence of disease or affect disease vectors (e.g. insect or water borne diseases)

No n.a

3.3 Affect the welfare of people e.g. by changing living conditions?

No n.a

3.4 Vulnerable groups of people who could be affected by the project e.g. hospital patients, children, the elderly etc.,

No n.a

3.5 Any other causes Nil n.a

4. Production of solid wastes during construction or operation or decommissioning (MT/month)

Sl. No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever

possible) with source of information data

4.1 Spoil, overburden or mine wastes Yes Drilled cuttings generated will be about 225-300m3 during the drilling over a period of 4-5 months.

4.2 Municipal waste (domestic and or commercial wastes)

No Septic tank will be provided for toilets in the drill site (Sewage about 10 m3/day)

4.3 Hazardous wastes (as per Hazardous Waste Management Rules)

Yes 1. Spent oil (Sent to base for disposal) through SPCB approved agencies Spent oil generated will be around 150-200lts/month. 2. Drill cuttings are nontoxic & nonhazardous as per lab test reports. Drill cutting will be confined to waste pit (impervious HDPE lined).

4.4 Other industrial process wastes Nil n.a.

4.5 Surplus product Nil n.a.

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4.6 Sewage sludge or other sludge from effluent treatment

No n.a.

4.7 Construction or demolition wastes Yes Will be disposed of for in surface hardening within drill site area.

4.8 Redundant machinery or equipment Nil n.a.

4.9 Contaminated soils or other materials Nil Will be confined in impermeable waste pit within the drill site area.

4.10 Agricultural wastes Nil n.a.

4.11 Other solid wastes Nil n.a.

5. Release of pollutants or any hazardous, toxic or noxious substances to air (Kg/hr)

Sl. No.

Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever possible) with source of information data

5.1 Emissions from combustion of fossil fuels from stationary or mobile sources

Yes Emissions from Captive Gensets (Rating: 6 x 750 KW) only 3 units will be normally operated for drilling rig. This is as per world over industrial practice. The emission of RSPM, SPM, SO2, NOx, HC & HOC from G set and flare stack. Emission will be kept under control within the permissible limit as per CPCB guide line. Regular monitoring of ambient air will be carried out during operation.

5.2

Emissions from production processes Yes If the well is hydrocarbon bearing during production testing flaring of

well fluids. This process will be for one/two days only.

5.3 Emissions from materials handling including storage or transport

No No emission from storage and material handling equipment except emission from generator set.

5.4 Emissions from construction activities including plant and equipment

Nil Normal emission from working JCB, trucks and trailers during the construction activities only.

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5.5 Dust or odors from handling of materials including construction materials, sewage and waste

Nil n.a.

5.6 Emissions from incineration of waste Nil n.a

5.7 Emissions from burning of waste in open air (e.g. slash materials, construction debris)

Nil n.a.

5.8 Emissions from any other sources Nil n.a.

6. Generation of Noise and Vibration, and Emissions of Light and Heat:

Sl. No.

Information/Checklist confirmation

Yes/No

Details thereof (with approximate quantities/rates, wherever possible) with source of information data with source of information data

From operation of equipment e.g. engines, ventilation plant, crushers

Yes Noise levels within permissible limits (Personal Protective Equipment will be provided if required)

6.2 From industrial or similar processes

Nil n.a.

6.3 From construction or demolition Nil n.a.

6.4 From blasting or piling Nil n.a.

6.5 From construction or operational traffic

Nil n.a.

6.6 From lighting or cooling systems Nil n.a.

6.7 From any other sources Nil n.a.

7. Risks of contamination of land or water from releases of pollutants into the ground or into sewers, surface waters, groundwater, coastal waters or

the sea:

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Sl. No.


7.1 From handling, storage, use or spillage of hazardous materials

No All effluents will be confined within impermeable waste pits

7.2 From discharge of sewage or other effluents to water or the land (expected mode and place of discharge)

No Sewage waste is disposed of through Septic Tank.

7.3 By deposition of pollutants emitted to air into the land or into water

No n.a.

7.4 From any other sources No n.a.

7.5 Is there a risk of long term build up of pollutants in the environment from these sources?

No Exploratory drilling is a temporary activity lasting 4 to 5 months.

8. Risk of accidents during construction or operation of the Project, which could affect human health or the environment

Sl. No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever possible) with source of information data

8.1 From explosions, spillages, fires etc from storage, handling, use or production of hazardous substances

Nil n.a.

8.2 From any other causes Yes Any potential risk will be handled as per existing contingency plan. **

8.3 Could the project be affected by natural disasters causing environmental damage (e.g. floods, earthquakes, landslides, cloudburst etc)?

No n.a.

** Contingency plan enclosed

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9. Factors which should be considered (such as consequential development) which could lead to environmental effects or the potential for

cumulative impacts with other existing or planned activities in the locality

S. No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever possible) with source of information data

9.1 Lead to development of supporting facilities, ancillary development or development stimulated by the project which could have impact on the environment e.g.: • Supporting infrastructure (roads, power supply, waste or waste water treatment, etc.) • housing development • extractive industries • supply industries • other

Yes

The exploratory drilling will lead to development / improvement of infrastructure (road, power supply).

9.2 Lead to after-use of the site, which could have an impact on the environment

No n.a.

9.3 Set a precedent for later developments Nil n.a.

9.4 Have cumulative effects due to proximity to other existing or planned projects with similar effects

Nil No industries is nearby

III. Environmental Sensitivity: Sl No Areas Name/ Identity Aerial distance (within 15 km.)

Proposed project location boundary

1 Areas protected under international conventions, national or local legislation for their ecological, landscape, cultural or other related value.

Historical Monuments around Sivasagar Town.

Distance 5.0-6.0km.

23

2 Areas which are important or sensitive for ecological reasons wetlands, watercourses or other water bodies, coastal zone, biospheres, mountains, forests.

None n.a.

3 Areas used by protected, important or sensitive species of flora or fauna for breeding, nesting, foraging, resting, over wintering, migration.

None n.a.

4 Inland, coastal, marine or underground waters. None n.a.

5 State, National boundaries. None n.a.

6 Routes or facilities used by the public for access to recreation or other tourist, pilgrim areas.

None n.a.

7 Defence installations. None n.a.

8 Densely populated or built-up area. Sivasagar Town. Distance 5.0-6.0km.

9 Areas occupied by sensitive man-made land uses (hospitals, schools, places of worship, community facilities).

Hospitals, schools etc. in Sivasagar Town

Distance 5.0-6.0km.

10 Areas containing important, high quality or scarce resources (ground water resources, surface resources, forestry, agriculture, fisheries, tourism, minerals).

None n.a.

11 Areas already subjected to pollution or environmental damage. (those where existing legal environmental standards are exceeded).

N/A n.a.

12 Areas susceptible to natural hazard which could cause the project to present environmental problems (earthquakes, subsidence, landslides, erosion, flooding or extreme or adverse climatic conditions).

Nil n.a.

IV Proposed Terms of Reference for EIA studies

1. Project techno-economic feasibility report.

24

2. Justification for locations considered for exploratory drilling

3. Baseline studies for Air / water quality in the proposed exploratory drilling locations.

4. Site specific data collection for air / water quality within the vicinity of the drill site (5 km. radius)

5. Socio-economic impact of exploratory drilling activity.

6. Identification of environmental impacts and mitigation measures

7. Environment management plan for the proposed drilling.

I hereby give undertaking that the data and information given in the application and enclosures are true to the best of my knowledge and belief and I am aware that if any part of the data and information submitted is found to be misleading at any stage the project will be rejected and clearance give, if any to the project will be revoked at our risk and cost

(Dr. A. K. Srivastava) GM (Geophysics)

Date: 30.08.2014 Block Manager-NAS Place: Jorhat

25

WELL IS OUT OF CONTROL- BLOW OUT DECLARED

RESTRICT THE ENTRY OF OUTSIDERS

ORGANISE HEAD COUNT

EVACUATE THE SITE

BLOW OUT

ORGANISE SEARCH AND RESCUE

FOR MINOR INJURIES

MOBILISE THE PATIENT TO NEAREST HOSPITAL

BLOWOUT WITH FIRE BLOWOUT WITHOUT FIRE

EVACUATE SITE

WAIT FOR INSTRUCTIONS

GAS OIL

SPRAY WATER

WAIT FOR FURTHER

INSTRUCTIONS

TAKE POLLUTION CONTROL MEASURES


EVACUATE SURROUNDINGS IF H2S PRESENTS

TALLIED?

FIRST AID

Yes No

PRIMARY RESPONSE INCIDENT REPORTING

BASE RADIO ROOM

ASSET MANAGER / BASIN MANAGER

HEAD DRILLING SERVICES

SURFACE MANAGER & HEAD WELL SERVICES

NEAREST POLICE STATION

M.R.O. OFFICE

STATE FIRE DEPT.

R.C.M.T.

S.E.M.

SECURITY

ASSESSMENT OF SITUATION ON SITE

ON SITE MEETING

NOMINATE PROJECT CO-ORDINATOR

CIVIL , ADMN., POLICE, STATE FIRE, MEDICAL

TASK FORCE

ENGINEERING

RELIEF WELL TEAM

SUPPORT SERVICES

FIELD INTERVENTION TEAM WORK OUT THE CONTROL STRATEGY

MOBILIZE THE RESOURCES

BLOW OUT CONTROL & FIRE FIGHTING EQUIPMENT

POLLUTION CONTROL EQUIPMENT

O.N.G.C.

OUT SIDE

EXPERTS

ESTABLISH INFRASTRUCTURE -- COMMUNICATION -- FIRST AID -- ON SITE CAMP

EXECUTE CONTROL PLAN

LOGISTICS, COMMUNICATION, WORK SHOP, S.E.M., FIRE, MEDICAL,

P&A, F&A, M.M, P.R., LEGAL

SECONDARY RESPONSE

O.N.G.C.

OUT SIDE

O.N.G.C.

OUT SIDE

1

PRE-FEASIBILITY REPORT

FOR DRILLING FOUR EXPLORATORY

WELLS

GKBS, GKBT, MKAD & NGAB

IN GELEKI, SE GELEKI & MEKEYPORE-SANTAK-NAZIRA

MINING LEASE AREAS


NORTH ASSAM SHELF A&AA BASIN

ONGC, JORHAT

2

Pre-feasibility Report for Drilling Four Exploratory Wells in Geleki, SE-Geleki &

Mekeypore-Santak-Nazira ML Areas

1. Introduction

Geleki and its satellite fields Mekeypore, Santak & Nazira are some of the important oil producing fields of ONGC situated in Sivasagar District of Assam. These areas form the part of North Assam shelf and had been producing hydrocarbons for more than three decades from Barails and Tipams. ONGC has received Mining Lease of these areas from MOPNG, Govt of India for exploring and producing hydrocarbons. The Mining Lease (ML) areas with their respective validity are given below,

1. Geleki ML (Area: 27.94 sq km, with effect from 16.08.1990 to15.08.2030)

2. SE Geleki ML (Area:20.5 sq.km, with effect from 30.01.2006 to 29.01.2026)

3. Mekeypore-Santak-Nazira ML (Area: 77.0 sq km, with effect from

30.01.2006 to 29.01.2026)

Geological Setting of the MLs;

Major tectonic elements of the basin are: Assam Shelf, Naga Schuppen belt and Assam-Arakan Fold belt. The basin is bounded on the north and west by the Brahmaputra River and on the south and east by the Indo-Burma Ranges. The Assam Shelf is being over thrust by the Himalayas on the northwest and by the Burma micro-plate on the southeast. Structurally, the Assam Arakan Basin consists of two primary, sub parallel features trending southwest to northeast, which developed just prior to, and as a result of plate collision. The northernmost structural feature is the Assam Shelf, which is presently being subducted beneath both the Eurasian plate to the north and northwest and the Burma plate to the southeast. The southernmost feature consists of en-echelon folds of the Naga Hills over-thrust belt and northernmost Indo-Burmese Range, which are continually developing as the shelf is subducted further.

The general geology of the area is well known from subsurface and outcrop data. The stratigraphic column consists of Archean metamorphic Basement overlain by Jaintia Group of Paleocene to Eocene age consisting of Tura, Sylhet and Kopili formations. The Jaintia Group is overlain by the Barail Group of sediments consisting of Disangmukh, Demulgaon and Rudrasagar formations of Eocene to Oligocene age and underlain by Tipam Group of Miocene to Pliocene age consisting of Geleki sandstone, Lakwa Sandstone, Girujan clay and Nazira Sandstone. Moran Group of younger sediments of Plio-Pleistocene to Recent age, comprising of Namsang, Dhekiajuli formations and Alluvium overlies the Tipam Group.

Reservoirs in different stratigraphic levels starting from various sand units of Barail Group (BMS, BCS sands) to sands within Tipam Group (TS-6, TS-5, TS-4, TS-3, TS-2 & TS-1) have been charged in different part of the MLs depending on favorable entrapment conditions. Shales/Claystones of within these formations and clays in Girujan & Namsang have acted as cap

3

rock facies. Based on evaluation of G & G data of the ML areas, the following locations have been identified for exploratory drilling:

1) GKBT, 2) GKBS, 3) MKAD & 4) NGAB.

1.2 Technical Justification for Released Locations

1 GKBT:

The location GKBT falls in a separate fault block towards the southeast of the main Geleki field. G&G studies carried out suggests possible presence of hydrocarbons in Tipam Formations (TS-4, TS-5). The location is to be drilled to a depth of 2975m (MD) and is technically viable. The details of the location are given below.

Sl No

Prospect Location Name

PEL-ML Category

TD (m) MD

Loc. Reference

Latitude / Longitude of Surface position.

Objective

1 SOUTH GELEKI GKBT GELEKI

-ML Expl., B-cat 2975

Lat: 260 47’ 45.456’’N

Long: 940 43’ 03.9037’’E

TS-4 &

TS-5


2. GKBS:

The location falls in the extreme south of the SE-Geleki ML. G&G studies carried out suggests possible presence of hydrocarbons in Tipam Formations (TS-4 & TS-5 pays). The location is to be drilled to a depth of 2900m (MSL) and is technically viable. The details of the location are given below.

Sl No


PEL-ML Category

TD (m) MD

Loc. Reference

Latitude / Longitude of Surface position.

Objective

2 SOUTH GELEKI GKBS

SE GELEKI

-ML

Expl., B-cat 3000

Lat: 260 45’ 53.228’’N Long: 940 40’ 32.262’’E

TS-4 &

TS-5 Spheroid: WGS-84, Projection System: Lambert Conical Single Parallel

4

3. MKAD:

The location MKAD is mapped as a fault closure at LCM and Tipam (TS-5) levels. G&G studies carried out suggests possible presence of hydrocarbons in Tipam Formations (TS-4 & TS-5 pays). The location is to be drilled to a depth of 3075 m (MSL) and is technically viable. The details of the location are given below.

Sl No


PEL-ML

Category TD (m) MD

Loc. Reference

Latitude / Longitude of Surface position

Objective

3 MEKEY-PORE MKAD

MK-SN-NZ-ML

Expl., B-cat 3175

Lat: 260 52’ 02.73’’N Long: 940 46’ 26.898’’E

TS-4 &

TS-5


4. NGAB:

The location NGAB is mapped as a fault closure at LCM. G&G studies carried out suggests possible presence of hydrocarbons in Tipam Formations (TS-4). The location is to be drilled to a depth of 2925 m (MSL) and is technically viable. The details of the location are given below.

Sl No


PEL-ML

Category TD (m) MD

Loc. Reference

Latitude / Longitude of Surface position

Objective

4 NORTH GELEKI NGAB

MK-SN-NZ-ML

Expl., B-cat 3025

Lat: 260 49’ 46.03’’N Long: 940 44’ 00.75’’E

TS-4


The above locations have been firmed up to oil exploration and are likely to accrete inplace hydrocarbons to the tune of about 4.09MMT. This will result in increase of hydrocarbon production and further improvement of the country’s economy. The locations are techno-economically viable.

2.0 Details of proposed Drilling Activity

ONGC owned electrical type E-2000 (BHEL Rig), which has a capacity to drill to the depth of 6000m is proposed to be deployed for undertaking drilling in the block. The technical details of the proposed drilling activities are given below:

5

Well location / Depth GKBS (Depth:2975m MD)

GKBT ( Depth:3000m MD)

MKAD (Depth:3175m MD)

NGAB (Depth: 3025m MD)

No of wells to be drilled One One One One Duration of drilling 6-7 months 6-7 months 6-7 months 6-7 months Qty of drilling fluid cu.m 900m3 900m3 900m3 900m3 Qty. of cuttings, cu.m Appox. 220-300m3 Appox. 220-300m3 Appox. 220-300m3 Appox. 220-300m3 Qty. of drlg. Waste water, cu.m 1400m3 1400m3 1400m3 1400m3

Location details (Surface position)

Lat: 260 45’ 53.228’’N Long: 940 40’ 32.262’’E

Lat: 260 47’ 45.456’’N Long: 940 43’ 03.9037’’E

Lat: 260 52’ 02.73’’N Long: 940 46’ 26.898’’E

Lat: 260 49’ 46.03’’N Long: 940 44’ 00.75’’E

Distance of block boundary from coastline Onland location Onland location Onland location Onland location






HC reserve (initially in place) 1.07 MMT 0.96 MMT 1.19 MMT 0.87 MMT

Formation pressure Hydrostatic Hydrostatic Hydrostatic Hydrostatic

Test flaring, duration 2 to 3 days, Flare details: Confined to the oil pit.

2 to 3 days, Flare details: Confined to the oil pit.



6

2.1 Details of the drilling rig proposed to be deployed Type of rig Electrical rig Drilling mud composition Water based drilling fluid Power generator type and no’s AC-SCR type. Four no’s Diesel consumption 200 litres/hour Qty. of fresh water requirement & source 2000m3. Transported from nearby source

through contractor. Manpower on rig 30 person / 12 hrs shift Material requirement & Mobilization From ONGC base, Sivsagar Details of solids handling system Shale shakers- 1200 GPM capacity



30m X 20m X 1.5m 40m X 30m X 1.5m


Only water based drilling mud will be used. The quantity of drill cuttings generated will be around 200-300 m3. The quantity of wastewater produced will be about 15 m3/day. The rig will be provided with solids handling system comprising Shale shakers (1200 GPM), de-sander (1200 GPM) and de-silter (1200 GPM) and Degasser with vacuum pump.

Drilling operations will be carried out using an electrical type drilling unit (Drilling Rig) for drilling of oil and gas wells. It consists of a derrick, at the top of which there is a crown block and a hoisting block fitted with a hook. From the hook a swivel a Kelly stem is suspended passing through a square or hexagonal Kelly bush which fits into the rotary table. The rotary table receives the power from an electric motor. The electric motor rotates the rotary table which passes through the Kelly bush and the rotations are transmitted to the bit as the drilling progresses, the drill pipe in singles are added to continue the drilling process. At the end of the bit life, the drill pipes are pulled out in stands and stacked on the derrick platform. A stand normally has 3 single drill pipes. After changing the bit, the drill string is run back into the hole and further drilling is continued. This process continues till the target depth is reached.


At the surface, the mud coming out from well along with the cuttings falls in a trough, passes through the solids control equipments i.e. shale shaker, de-sander and de-silter. These equipments remove the solids of different sizes which get mixed with the mud during the course of drilling. The cleaned mud flows back to the suction tanks to be again pumped into the well. The drilling mud/fluid circulation is thus a continuous cyclic operation. The most suitable clay for mud preparation is bentonite which is capable of forming highly dispersed colloidal solutions. Various other chemicals are

7

also used in mud preparation as per requirements dictated by the temperature/pressure conditions of the wells. The mud is continuously tested for its density, viscosity, yield point, water loss, pH value etc. to ensure that the drilling operations can be sustained without any down hole complications. 2.3 Drilling Facilities

Drilling is a temporary activity which will continue for about 6-7 months for each well in the block. The rigs are self-contained for all routine jobs. Once the drilling operations are completed, and if sufficient indications of hydrocarbons are noticed while drilling, the well is tested by perforation in the production casing. This normally takes 2-3 days. If the well is found to be successful hydrocarbon bearing, it is sealed off for future development. If no commercial hydrocarbon is struck, the well is abandoned according to existing safety norms. 2.4 General Requirements of Drilling



The drilling process requires rotation of drill bit through the draw works which require power. The power requirement of the drilling rig will be met by using the four diesel generator sets with a diesel consumption of about 4.8 Kl / day. The exhaust stacks of the DG sets are likely to vent the emissions. c. Water requirements

The water requirement in a drilling rig is mainly meant for preparation of drilling mud apart from washings and domestic use. While the former consumes the majority of water requirement, the water requirement for domestic and wash use is very less. The daily water consumption will be 25 m3/d of which 15m3/d will be used for mud preparation and 10m3/d will be used for domestic purposes including drinking. d. Domestic wastewater


8

The rock cuttings and fragments of shale, sand and silt associated with the return drilling fluid during well drilling will be separated using shale shakers and other solids removal equipment like de-sanders and de-silters. The recovered mud will be reused while the rejected solids will be collected and discharged into the waste pit. f. Drill cuttings and waste residual muds

During drilling operations, approx. 400-525 m3 per well of wet drill cuttings are expected to be generated from each well depending on the type of formation and depth of drilling. In addition to the cuttings 15-20 m3/day of wastewater is likely to be generated during well drilling. The waste residual muds and drill cuttings which contain clay, sand etc. will be disposed into the waste pit. g. Testing

Testing facilities will be available at drilling rig for separation of liquid phase and burning of all hydrocarbons during testing. The test flare boom will be located at a distance from the drilling rig.

h. Chemical storage



Crew transfers to and from the drilling rig, materials, diesel and chemicals will be through light vehicles, trucks and trailers.

3.0 Investment anticipated


Sl. No Name of the locations Investment anticipated

1 GKBS Approximately 40 Crores

2 GKBT Approximately 40 Crores

3 MKAD Approximately 40 Crores

4 NGAB Approximately 40 Crores

3.1 Justification for Environmental Clearance

Geleki ML is highly prospective where oil and gas have been discovered and produced from a large stratigraphic column ranging from Pre-Barails to Girujan Formation. However there are

9

areas within the ML which still have untapped hydrocarbons. These locations are proposed for these exploiting these pools.

In view of the above it is proposed to award environmental clearance for drilling four exploratory wells at the earliest so that the drilling commitments as well post drilling evaluations could be carried out.

The coordinates of the ML areas in which wells are proposed wells are to be drilled are as follows:

SL. NO.

ML NAME (AREA )

BOUNDARY POINTS

LATITUDE LONGITUDE

DEG. MIN. SEC. DEG. MIN. SEC.

1

GELEKI ML (27.94 Sq. Km.)

I 26 49 20.06 94 44 06.54 Z 26 49 11.88 94 41 43.98 Y 26 47 50.92 94 40 28.25 U 26 46 37.32 94 40 14.88 V 26 46 25.87 94 41 35.07 W 26 46 46.31 94 44 15.45

2

SE GELEKI ML (20.5 Sq. Km)

A 26 46 14.8 94 39 0 B 26 44 15 94 39 0 C 26 44 0 94 40 0 D 26 44 15 94 41 0 E 26 45 15 94 43 0 F 26 46 36.72 94 43 0 G 26 46 31.59 94 42 19.62 H 26 45 43.24 94 40 56.71 I 26 45 37.5 94 39 30.71 J 26 46 28.68 94 39 42.21 A 26 46 14.8 94 39 0

3

MK-SN-NZ-

ML (77.00 Sq.Km)

Part-I (12.00Sq.K

m)

A 26 57 13.88 94 43 16.45 B 26 57 13.84 94 44 30 C 26 53 30 94 43 30 D 26 53 27.46 94 40 41.61 E 26 56 47 94 43 26.45 A 26 57 13.88 94 43 16.45

Part-II (57.00Sq.K

m)

F 26 54 30 94 47 0 G 26 52 30 94 48 0 H 26 47 22 94 44 15 I 26 49 20.06 94 44 6.54 J 26 49 11.88 94 41 43.98 K 26 50 0 94 41 32.23 F 26 54 30 94 47 0

10

Table 1.2

Ingredients of water based drilling fluid

Sl. No Chemicals

13. Barite

14. Bentonite






20. EP lube


22. Caustic soda


24. Soda ash

11

Table 1.3

Special Additives and Their Functions in Water Based Drilling Fluids




10. Groundnut shells, mica of cellophane


11. Cellulose polymers or starch

Counter thick, sticky filter cake, decrease filter loss to formation



14. Pill of oil based mud spotting fluid

Counter differential pressure sticking of string. Pill is placed down hole opposite contact zone to free pipe.

12

R.C.M.T –CONTINGENCY PLAN

RCMT – REGIONAL CRISIS MANAGEMENT TEAM

INCHARGE TRANSPORT

HEAD RCMT, SIVASAGAR

OTHER TEAM

MEMBERS

TO PROCEED

TO LOCATION

CARRY OUT EMERGENCY

RESPONSE PLAN

1. MOVE TO THE LOCATION IMMEDIATELY. 2. ASSESS THE SITUATION. 3. INTIMATE ABOUT THE SITUATION TO HEAD CMT 4. WORK OUT ACTION PLAN 5. ACTIVATE THE LOGISTICS SECTION.

SIVASAGAR BASE TEAM

• TO KEEP THE EQUIPMENT READY TO LOAD AS PER THE INSTRUCTIONS OF I/C RCMT.

• CHECK THE EQUIPMENT WITH REFERENCE TO CHECKLIST.

• TO COORDINATE WITH LOGISTICS SECTION REGARDING DEPLOYMENT OF TRAILORS AND LOADING

AT THE LOCATION

CARRY OUT ACTION PLAN

BLOWOUT REPORTED

13

INCIDENT MANAGEMENT PLAN

HEAD CMT -CORPORATE

Support Group Special Services

Surface Intervention Team

Works

Fire Services

Material Procurement

Communication

Work Shop

Directional Drilling

Logging Services

Action Plan

Mobilization of Equipment & Personnel

Execution

Food & Accommodation

Snubbing

Coil Tubing

Safety Team

BASIN MANAGER

EXPERT CONSULTANCY Well

Control Snubbing Relief Well Planning

EXECUTIVE BOARD

BASIN COORDINATOR

Insurance Coordinator

Medical Services

Cementing

•Information •Documentation •Resources of Equipment /Personnel

Rig Deployment

Execution

Kill Planning

•Pollution Control Team •Environment Management Team

Accident Care Team

Relief Well Team

Logistics

Legal

Planning

Form-1_Geleki

APPENDIX I

(See paragraph – 6)

FORM 1

I) Basic Information:

Sl. No. Item Details

1 Name of the project/s Exploratory drilling of four wells in North Assam Shelf Block, Assam & Assam-Arakan Basin.

2 S. No in the Schedule

3

Proposed Capacity/ area/length/ tonnage to be handled/ command area/ lease area/ number of wells to be drilled

Sl. no. Name of location

Target depth

District

1 GKBS 2900m Sibsagar

2 GKBT 2875m Sibsagar

3 MKAD 3075m Sibsagar

4 NGAB 2925m Sibsagar

4 New/Expansion/ Modernization New

5 Existing capacity/Area etc. Yet to be acquired.

6 Category of Project i.e. ‘A’ or ‘B’ ‘A’

7 Does it attract the general condition? If yes, please specify. No

Form-1_Geleki

8 Does it attract the specific condition? If yes, please specify. No

9 Location GKBS (RGS-19)

Plot/Survey/Khasra No Surface Position: Lat: 260 45’ 53.228’’N Long: 940 40’ 32.262’’E

Village/Area Geleki Reserve Forest Tehsil Sivasagar Forest Division District Sibsagar State Assam


Simaluguri railway station in Assam, appox. 16 km; nearest airport: Jorhat, approx. 95km.


Geleki Town, Sivasagar District, Assam. Distance:15 km.


Divisional Forest Officer, Sivasagar Division, PO : Sivasagar PIN : 785640 Ph. No.9435195579

Location GKBT (RGS-18)

Plot/Survey/Khasra No Surface Position: Lat: 260 47’ 45.456’’N; Long: 940 43’ 3.903’’E

Village/Area Village Moran Gaon Mouza - Athkhel

Tehsil Revenue Circle:-Nazira

District Sivasagar

State Assam

Form-1_Geleki

Nearest railway station/airport along with distance in kms. Simaluguri railway station, Nazira, 16 km & Dibrugarh airport approx. 95 km in Assam.




VP – Geleki, ZP – Athkhel P.O.-Geleki, PIN.-785696

Ph No. – 8011813953

Location MKAD (RMK-4)

Plot/Survey/Khasra No Surface Position: Lat: 260 52’ 02.73’’N: Long: 940 46’ 26.898’’E

Village/Area Village – Sundar Pukhuri Hulal gaon, Mouza - Juktoli

Tehsil Revenue Circle:-Nazira

District Sivasagar

State Assam


Simaluguri railway station appox. 16 km & nearest airport: Dibrugarh approx. 95 km in Assam.




Village Panchayat- Juktoli, ZP _ Juktoli P.O. –Rajmao PIN.-785685 Ph No. 9435743568

Form-1_Geleki

Location NGAB (RNG-8)

Plot/Survey/Khasra No Surface Position: Lat: 260 49’ 46.03’’N; Long: 940 44’ 00.75’’E

Village/Area Village – Harkina Mouza – Athkhel

Tehsil Rev. Circle - Nazira District Sibsagar State Assam

Nearest railway station/airport along with distance in kms. Simaluguri railway station, Nazira, 9 km & nearest airport: Jorhat approx. 95 km.


Nazira, Sibsagar


VP Peoli Phukan ZP – Athkhel PO- Geleki, PIN.-785696 Ph No. 8011813953

10 Name of the applicant ONGC LTD

11 Registered Address ONGC LTD, Jeevan Bharti, Tower-II, 124-Indira Chowk, New Delhi-110001

12

Address for correspondence Office of the Basin Manager, Luit Bhawan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704

Name C. Mahapatra Designation Basin Manager Address Luit Bhavan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704 Pin Code 785704 E-mail [email protected] Telephone No. 0376-2360012 Fax No 0376-2360012

Form-1_Geleki

13 Details of Alternative Sites Examined, if any location of these sites should be shown on topo sheet.

N/A

14 Interlinked Project No

15 Whether separate application for interlinked project has been submitted?

N/A

16 If yes, date of submission N/A 17 If no, reason N/A

18

Whether the proposal involves approval/ clearance under: if yes, details of same and their status to be given.

Yes. The Forest clearance (Conservation) Act, 1980 will be taken as per norms (a) The Forest(Conservation) Act, 1980 (b) The Wildlife (Protection) Act,1972

(c) The C.R.Z Notification

19 Whether there is any Government Order/Policy relevant/relating to the site

No

20 Forest land involved No

21

Whether there is any litigation pending against the project and/or land in which the project is proposed to set up? N/A

(a) Name of the Court

(b) Case No

Form-1_Geleki

(c) Orders/ directions of the Court, if any and its relevance with the project

II) Activity

1. Construction, operation or decommissioning of the Project involving actions, which will cause physical changes in the locality (topography, land use, changes in water bodies, etc.)

S. No.




1.2 Clearance of existing land, vegetation and buildings?

Yes Site leveling and fencing

1.3 Creation of new land uses? No n.a.




1.6 Demolition works? No n.a.




Yes Temporary sheds and bunk-houses of working staff during shift duties.

Form-1_Geleki

1.9 Underground works including mining or tunneling?

Yes Drilling will ranges from 3000 m up to 3500 m depth. (Tentative)


1.11 Dredging? No n.a.

1.12 Offshore structures? No n.a.

1.13 Production and manufacturing processes? No n.a.

1.14 Facilities for storage of goods or materials? Yes Mechanical and drilling spares and drilling chemicals in temporary sheds.


Yes Solid waste / drilled rock cuttings will be confined within the waste pit lined with impervious HDPE lining

1.16 Facilities for long term housing of operational workers?

No Rig workers are operating on 2 days on/off pattern from their respective homes.


No n.a.


Yes

Approach road envisaged from the existing public road network.


No

n.a.

1.20 New or diverted transmission lines or pipelines?

No

n.a.


No n.a.

Form-1_Geleki

1.22 Stream crossings? Yes May have to cross small streams falling in the block




No n.a.


Yes Rig personal operate from the drill site accommodation (bunk houses)


No n.a.


No n.a.


No n.a.

1.29 Introduction of alien species? No n.a.

1.30 Loss of native species or genetic diversity? No n.a.

1.31 Any other actions? Nil n.a.

2. Use of Natural resources for construction or operation of the Project (such as land, water, materials or energy, especially any resources

which are non-renewable or in short supply):

S. No.

Information / checklist confirmation Yes / No

Details thereof (with approximate quantities /rates, wherever possible) with source of information data

2.1 Land especially undeveloped or agricultural land (ha)

Agricultural land

Approximately 150x150m land is proposed to be acquired on lease/rent for activity of each well.

Form-1_Geleki

2.2 Water (expected source & competing users) unit: KLD

Yes 20-25 M3 / day for Drilling and domestic purpose

2.3 Minerals (MT) Nil n.a.


Yes Sand / Stone / Cement 100 Tons from nearby dealers

2.5

Forests and timber (source – MT) No n.a.


Yes 6 KL./day (Diesel for running captive Gensets & engines in Drilling rigs)


No n.a.

3. Use, storage, transport, handling or production of substances or materials, which could be harmful to human health or the environment or

raise concerns about actual or perceived risks to human health.

S. No.

Information/Checklist confirmation Yes / No Details thereof (with approximate quantities/rates, wherever possible) with source of information data





No n.a.


No n.a.


No n.a.

Form-1_Geleki

3.5 Any other causes Nil n.a.

4. Production of solid wastes during construction or operation or decommissioning (MT/month)

S. No.


4.1 Spoil, overburden or mine wastes Yes Drilled cuttings generated will be about 220-300m3

during the drilling period





4.4 Other industrial process wastes Nil

4.5 Surplus product Nil


No

4.7 Construction or demolition wastes Oily sludge will be collected and disposed by bioremediation

4.8 Redundant machinery or equipment Nil


4.10 Agricultural wastes Nil

4.11 Other solid wastes Nil

Form-1_Geleki

5. Release of pollutants or any hazardous, toxic or noxious substances to air (Kg/hr)

S. No.




5.2

Emissions from production processes

Yes If the well is hydrocarbon bearing during production testing flaring of well fluids. This process will be for one/two days only.






Nil n.a.

5.6 Emissions from incineration of waste Nil n.a. 5.7 Emissions from burning of waste in open air

(e.g. slash materials, construction debris) Nil n.a.

5.8 Emissions from any other sources Nil N,a.

Form-1_Geleki


S. No. Information/Checklist confirmation Yes/No

Details thereof (with approximate quantities/rates, wherever possible) with source of information data with source of information data

6.1 From operation of equipment e.g. engines, ventilation plant, crushers


6.2 From industrial or similar processes Nil n.a.



6.5 From construction or operational traffic Nil n.a.



7. Risks of contamination of land or water from releases of pollutants into the ground or into sewers, surface waters, groundwater, coastal

waters or the sea:

S. No.


7.1 From handling, storage, use or spillage of hazardous materials

No All effluents will be confined within impermeable waste pits


No Sewage waste is disposed of through separate Septic Tank in Drill site accommodation.


No n.a.

Form-1_Geleki





S. No.



Nil n.a.



No n.a.

** Contingency plan enclosed 10. Factors which should be considered (such as consequential development) which could lead to environmental effects or the potential for

cumulative impacts with other existing or planned activities in the locality

S. No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever possible) with source of information data

Form-1_Geleki


Yes

The exploratory drilling leads to development / improvement of infrastructure (road, power supply).


No

9.3 Set a precedent for later developments Nil



III. Environmental Sensitivity:

S. No.

Areas

Name/ Identity

Aerial distance (within 15 km.) Proposed project location boundary

1 Areas protected under international conventions, national or local legislation for their ecological, landscape, cultural or other related value

None n.a.

2 Areas which are important or sensitive for ecological reasons wetlands, watercourses or other water bodies, coastal zone, biospheres, mountains, forests

yes At some locations Forest & / or mountains can be near.

Form-1_Geleki

3 Areas used by protected, important or sensitive species of flora or fauna for breeding, nesting, foraging, resting, over wintering, migration

Nil n.a.

4 Inland, coastal, marine or underground waters

Nil n.a.

5 State, National boundaries No n.a.

6 Routes or facilities used by the public for access to recreation or other tourist, pilgrim areas

None n.a.

7 Defence installations Nil n.a.

8 Densely populated or built-up area No n.a.

9 Areas occupied by sensitive man-made land uses (hospitals, schools, places of worship, community facilities)

No n.a.

10 Areas containing important, high quality or scarce resources (ground water resources, surface resources, forestry, agriculture, fisheries, tourism, minerals)

Nil

n.a.

11 Areas already subjected to pollution or environmental damage. (those where existing legal environmental standards are exceeded)

N/A

n.a.

12 Areas susceptible to natural hazard which could cause the project to present environmental problems (earthquakes, subsidence, landslides, erosion, flooding or extreme or adverse climatic conditions)

Nil

n.a.

IV Proposed Terms of Reference for EIA studies

8. Project techno-economic feasibility report.

Form-1_Geleki

9. Justification for locations considered for exploratory drilling

10. Baseline studies for Air / water quality in the proposed exploratory drilling locations.

11. Site specific data collection for air / water quality within the vicinity of the drill site (5 km. radius)

12. Socio-economic impact of exploratory drilling activity.

13. Identification of environmental impacts and mitigation measures

14. Environment management plan for the proposed drilling.

I hereby give undertaking that the data and information given in the application and enclosures are true to the best of my knowledge

and belief and I am aware that if any part of the data and information submitted is found to be misleading at any stage the project will be

rejected and clearance give, if any to the project will be revoked at our risk and cost.

(Dr. A.K. Srivastava)

GM-Block Manager, NAS Block A&AA Basin, Jorhat

Form-1_Geleki



ORGANISE HEAD COUNT

EVACUATE THE SITE

BLOW OUT


FOR MINOR INJURIES



EVACUATE SITE


GAS OIL

SPRAY WATER

WAIT FOR FURTHER

INSTRUCTIONS




TALLIED?

FIRST AID

Yes No


BASE RADIO ROOM





M.R.O. OFFICE

STATE FIRE DEPT.

R.C.M.T.

S.E.M.

SECURITY


ON SITE MEETING



TASK FORCE

ENGINEERING

RELIEF WELL TEAM

SUPPORT SERVICES





O.N.G.C.

OUT SIDE

EXPERTS





SECONDARY RESPONSE

O.N.G.C.

OUT SIDE

O.N.G.C.

OUT SIDE

Pre-feasibility_Report_Lakwa_Laipling_gaon

Pre-Feasibility Report

FOR DRILLING TWO EXPLORATORY

WELLS

DGAJ & LKBB

IN LAKWA MINING LEASE


NORTH ASSAM SHELF A&AA BASIN ONGC, JORHAT


Pre-feasibility Report of Drilling of Two Exploratory Wells in Lakwa ML Area

1. Introduction

Lakwa Mining Lease (ML) contains important oil producing fields of ONGC situated in Sivasagar District of Assam. The area of this lease is 172.49 square kilometers. This ML area forms the part of North Assam shelf and has been producing hydrocarbons for more than three decades from Barails and Tipams. A 20 years ML has been obtained with effect from 29.09.2008 and is valid upto 28.09.2028. So far, 681 numbers of wells (including exploratory and development wells) have been drilled in this mining lease with depths ranging from 2259m to as deep as 5113m.

1.1 Geological Setting The general geology of the area is well known from subsurface and outcrop data. The stratigraphic column consists of Archean metamorphic Basement overlain by Jaintia Group of Paleocene to Eocene age consisting of Tura, Sylhet and Kopili formations. The Jaintia Group is overlain by the Barail Group of sediments consisting of Disangmukh, Demulgaon and Rudrasagar formations of Eocene to Oligocene age and underlain by Tipam Group of Miocene to Pliocene age consisting of Geleki sandstone, Lakwa Sandstone, Girujan clay and Nazira Sandstone. Moran Group of younger sediments of Plio-Pleistocene to Recent age, comprising of Namsang, Dhekiajuli formations and Alluvium overlies the Tipam Group.

Reservoirs in different stratigraphic levels starting from Tura Formation, various sand units of Barail Group (BMS, LBS-I, LBS-II, LBS-III, LBS-IV, LBS-V & LBS-VI) to sands within Tipam Group (TS-6, TS-5, TS-4, TS-3, TS-2 & TS-1) have been charged in different part of the area depending on favorable entrapment conditions. Shales/Claystones of within these formations and clays in Girujan & Namsang have acted as cap rock facies.

Based on evaluation of G & G data following prospects have been identified for further probing. 1) DGAJ & 2) LKBB Well locations DGAJ and LKBB fall in LAKWA ML.

1.2 Technical Justification for Released Locations

1. DGAJ: The location DGAJ falls in the up-thrown side of the EW trending major normal fault

and lies between the Demulgaon and Lakhmani fields. The location is proposed primarily for TS-4 sand. G&G studies carried out suggest possible presence of hydrocarbons in Tipam Formation and is techno-economically viable. The details of the location are given below.

Sl No

Prospect Proposed Location

PEL-ML Category TD (m) MD

Loc. Reference of Surface Position Latitude / Longitude

Objective

1 DEMULGAON DGAJ LAKWA -ML

Expl., B-cat

3300 Latitude: 260 58’ 14.69”N Longitude:940 46’ 34.70”E

TS-4 & TS-5



2. LKBB:

The location is proposed north-east of Lakhmani field. The location is proposed primarily for TS-4 sand. G&G studies carried out suggest possible presence of hydrocarbons in Tipam Formation and is techno-economically viable. The details of the location are given below.

Sl No

Prospect Proposed Location

PEL-ML Category TD (m) MD

Loc. Reference of Surface Position Latitude / Longitude

Objective

2

LAKHMANI

LKBB

LAKWA -ML

Expl., B-cat

3300

Lat: 270 01’ 41.296’’N Long: 940 49’ 53.111’’E

TS-4 & TS-5


The locations DGAJ and LKBB have been firmed up to oil exploration and are likely to accrete inplace hydrocarbons to the tune of about 5.17 MMT. This will result in increase of hydrocarbon production and further improvement of the country’s economy. The locations are techno-economically viable.

2. Details of proposed Drilling Activity ONGC owned electrical type E-2000 (BHEL Rig), which has a capacity to drill to the

depth of 6000m is proposed to be deployed for undertaking drilling in the block. The technical details of the proposed drilling activity are given below:

Well location/ Depth

DGAJ Target Depth:3300m MD

LKBB Target Depth: 3300m MD

No of wells to be drilled

One One

Duration of drilling 6-7 months 6-7 months Qty of drilling fluid cu.m

900 cubic meter 900 cubic meter

Qty. of cuttings cu.m

230 - 300 230 - 300

Qty. of drlg. Waste water, cu.m

1400 1400

Location details Latitude: 260 58’ 14.69”N Longitude: 940 46’ 34.70”E

Lat: 270 01’ 41.296’’N Long: 940 49’ 53.111’’E

Distance of block boundary from coastline

Onland location Onland location




HC reserve (initially in place)

0.87 MMT 1.39 MMT

Formation pressure Hydrostatic Hydrostatic Test flaring, duration 2 to 3 days, Flare details:

Confined to the oil pit. 2 to 3 days, Flare details: Confined to the oil pit.


2.1 Details of the drilling rig proposed to be deployed Type of rig Electrical rig Drilling mud composition Water based drilling fluid Power generator type and no’s AC-SCR type. Four numbers Diesel consumption 200 litres/hour Qty. of fresh water requirement & source 2000m3. To be transported from nearby

source through contractor. Manpower on rig 30 person / 12 hrs shift Material requirement & Mobilization From ONGC base, Sivsagar Details of solids handling system Shale shakers- 1200 GPM capacity



30m X 20m X 1.5m 40m X 30m X 1.5m


Only water based drilling mud will be used. The quantity of drill cuttings generated will

be around 230-550 m3. The quantity of wastewater produced will be about 15 m3/day. The rig will be provided with solids handling system comprising Shale shakers (1200 GPM), de-sander (1200 GPM) and de-silter (1200 GPM) and Degasser with vacuum pump.

Drilling operations will be carried out using an electrical type drilling unit for drilling of oil and gas wells. It consists of a derrick, at the top of which there is a crown block and a hoisting block with a hook. From the swivel a Kelly stem is suspended passing through a square or hexagonal Kelly bush which fits into the rotary table. The rotary table receives the power to drive it from an electric motor. The electric motor rotates the rotary table which passes through the Kelly bush and the rotations are transmitted to the bit as the drilling progresses, the drill pipe in singles are added to continue the drilling process. At the end of the bit life, the drill pipes are pulled out in stands and stacked on the derrick platform. A stand normally has 3 single drill pipes. After changing the bit, the drill string is run back into the hole and further drilling is continued. This process continues till the target depth is reached.



At the surface, the mud coming out from well along with the cuttings falls in a trough,

passes through the solids control equipments i.e. shale shaker, de-sander and de-silter. These equipments remove the solids of different sizes which get mixed with the mud during the course of drilling. The cleaned mud flows back to the suction tanks to be again pumped into the well. The drilling mud/fluid circulation is thus a continuous cyclic operation. The most suitable clay for mud preparation is bentonite which is capable of forming highly dispersed colloidal solutions. Various other chemicals are also used in mud preparation as per requirements dictated by the temperature/pressure conditions of the wells. The mud is continuously tested for its density, viscosity, yield point, water loss, pH value etc. to ensure that the drilling operations can be sustained without any down hole complications. 2.3 Drilling Facilities

Drilling is a temporary activity which will continue for about 6-7 months for each well in the block. The rigs are self-contained for all routine jobs. Once the drilling operations are completed, and if sufficient indications of hydrocarbons are noticed while drilling, the well is tested by perforation in the production casing. If the well is found to be successful hydrocarbon bearing, it is sealed off for future development. If no commercial hydrocarbon is struck the well is abandoned according to existing safety norms. 2.4 General Requirements of Drilling



The drilling process requires rotation of drill bit through the draw works which require power. The power requirement of the drilling rig will be met by using the four diesel generator sets with a diesel consumption of about 4.8 Kl/day. The exhaust stacks of the DG sets are likely to vent the emissions.


c. Water requirements

The water requirement in a drilling rig is mainly meant for preparation of drilling mud apart from washings and domestic use. While the former consumes the majority of water requirement, the water requirement for domestic and wash use is very less. The daily water consumption will be 25 m3/d of which 15m3/d will be used for mud preparation and 10m3/d will be used for domestic purposes including drinking. d. Domestic wastewater


The rock cuttings and fragments of shale, sand and silt associated with the return drilling fluid during well drilling will be separated using shale shakers and other solids removal equipment like de-sanders and de-silters. The recovered mud will be reused while the rejected solids will be collected and discharged into the waste pit. f. Drill cuttings and waste residual muds During drilling operations, approx. 400-525 m3 per well of wet drill cuttings are expected to be generated from each well depending on the type of formation and depth of drilling. In addition to the cuttings 15-20 m3/day of wastewater is likely to be generated during well drilling. The waste residual muds and drill cuttings which contain clay, sand etc. will be disposed into the waste pit. g. Testing

Testing facilities will be available at drilling rig for separation of liquid phase and burning of all hydrocarbons during testing. The test flare boom will be located at a distance from the drilling rig. h. Chemical storage



Crew transfers to and from the drilling rig, materials, diesel and chemicals will be through light vehicles, trucks and trailers. 3. Investment anticipated


S.No Name of the locations Investment anticipated

1 DGAJ Approximately Rs 40 crores 2 LKBB Approximately Rs 40 crores

4. Justification for Environmental Clearance


Lakwa and Laipling Gaon Mining Lease are highly prospective where oil and gas have been discovered and produced from a large stratigraphic column ranging from Tura to Girujan Formation. However there are areas within the ML which still have untapped hydrocarbons. These locations are proposed for these exploiting these pools.

In view of the above it is proposed to obtain the environmental clearance at the earliest so that the drilling commitments as well post drilling evaluations could be carried out. The total area proposed for environmental clearance amounting to 198.49 Sq Km is shown in the map enclosed at Fig 1.1

The coordinates of the area proposed for environmental clearance are as follows:

SL. NO.

ML NAME (AREA )

BOUNDARY POINTS

LATITUDE LONGITUDE

DEG. MIN. SEC. DEG. MIN. SEC.

1

LAKWA ML (172.49 Sq. Km.)

A 26 59 57.75 94 43 17.57 B 27 00 16.00 94 45 41.00 C 27 01 12.75 94 46 01.29 D 27 05 00 94 54 33.50 E 27 05 00 94 56 38.00 F 27 00 01.25 94 55 59.86 G 26 59 08.00 94 54 11.86 H 26 59 04.00 94 52 42.71 I 26 58 36.75 94 52 09.50 J 26 58 36.50 94 50 00 K 26 57 50.50 94 47 01.71 L 26 57 13.75 94 47 01.00 M 26 57 13.88 94 43 16.50

Table 1.2

Ingredients of water based drilling fluid

Sl. No Chemicals 25. Barite

26. Bentonite







32. EP lube


34. Caustic soda


36. Soda ash

Table 1.3

Special Additives and Their Functions in Water Based Drilling Fluids




17. Groundnut shells, mica of cellophane


18. Cellulose polymers orstarch

Counter thick, sticky filter cake, decrease filter loss to formation



21. Pill of oil based mud spotting fluid

Counter differential pressure sticking of string. Pill is placed down hole opposite contact zone to free pipe.

Form-1_DGAJ & LKBB

APPENDIX-I (See paragraph – 6)

FORM 1

I. Basic Information:

Serial No.

Item Detail

1. Name of the project/s Drilling of Exploratory two exploratory wells in Lakwa ML area, Sivasagar District, Assam.

MOPNG, Govt of India, Award of ML, Letter No. F. No.0-12012/101/2003-ONG-III, dated 15th July-2009

PEM, Govt of Assam, Award of PML, Letter No. PEM.7/2006/41, dated 3rd August 2006.


3. Proposed Capacity/area/length/tonnage to be handled/command area/lease area/number of wells to be drilled


Target Depth (meters) MSL

District

1. DGAJ 3300m Sivasagar

2. LKBB 3300m Sivasagar

4. New/Expansion/Modernization New



Form-1_DGAJ & LKBB

7. Does it attract the general condition? If yes, please specify. No

8. Does it attract the specific condition? If yes, please specify. No

9. Location 1.) DGAJ

Plot/Survey/Khasra No Coordinates of Surface Position: Latitude: 260 58’14.69’’N Longitude: 940 46’34.70’’E;

Dag no. 310,304,342,312,403,401,400,402, 399 Patta No. 35,1,71,84,32,26, and 31

Village/Area Village -Jojoli Gaon,

Mouza – Silakuti/Mahmora

Tehsil Revnue Circle - Sonari

District Sivasagar

State Assam

Nearest railway station/airport along with distance in kms. Simaluguri Town railway station is approximately 14 km, Jorhat Airport (Assam) is at a distance of approximately 75 km.




Village Panchayat – Disangpani, ZP – Rangoli P.O.-Moranjan via Sepon

Ph . No 9954185700

Form-1_DGAJ & LKBB

Location 2.) LKBB

Plot/Survey/Khasra No Coordinates of Surface Position: Latitude: 270 01’ 41.296’’N Longitude: 940 49’ 53.111’’E

Village/Area Village – Kotoky Papong

Mouza - Khaloighugura

Tehsil Revenue Circle Mahmora

District Sivasagar.

State Assam

Nearest railway station/airport along with distance in kms. Lakwa Town railway station in Assam approximately 16 km, Jorhat Airport (Assam) is at a distance of approximately 75 km.




Village Panchayat – Nij Khaloighugura ZP – Lakwa PO –Dhitaipukhuri, PIN-785685 PH. No.-9577172208



Form-1_DGAJ & LKBB

12. Address for correspondence Luit Bhawan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704

Name C. Mahapatra


Address Luit Bhavan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704

Pin Code 785704



Fax No 0376-2360012


N/A



N/A



Form-1_DGAJ & LKBB


(d) The Forest(Conservation) Act, 1980

(e) The Wildlife (Protection) Act,1972

(f) The C.R.Z Notification


19. Whether there is any Government Order/Policy relevant/relating

to the site

No



(d) Name of the Court

(e) Case No

(f) Orders/ directions of the Court, if any and its relevance with the project

None

II. Activity


Sl. No.




Form-1_DGAJ & LKBB

1.2 Clearance of existing land, vegetation and buildings? Yes Site leveling and fencing










1.9 Underground works including mining or tunneling? Yes Drilling will ranges from 3000 m up to 4000 m depth (Tentative).




1.13 Production and manufacturing processes? No n.a




Form-1_DGAJ & LKBB

1.16 Facilities for long term housing of operational workers? No Rig workers are operating on 14 days on/off pattern from their respective hometowns.


No n.a


Yes



No

n.a

1.20 New or diverted transmission lines or pipelines? No n.a


No n.a





No n.a




No n.a


No n.a


No n.a


Form-1_DGAJ & LKBB

1.30 Loss of native species or genetic diversity? No n.a


2. Use of Natural resources for construction or operation of the Project (such as land, water, materials or energy, especially any resources which are non-renewable or in short supply):

Sl.

No. Information / checklist confirmation Yes / No Details thereof (with approximate quantities /rates,

wherever possible) with source of information data

2.1 Land especially undeveloped or agricultural land (ha) yes 100m x100m, agricultural land.

2.2 Water (expected source & competing users) unit: KLD Yes 20-25 M3 / day for Drilling and domestic purpose




2.5





No n.a

3. Use, storage, transport, handling or production of substances or materials, which could be harmful to human health or the environment or raise concerns about actual or perceived risks to human health.

Sl. No.


Form-1_DGAJ & LKBB





No n.a


No n.a


No n.a


4. Production of solid wastes during construction or operation or decommissioning (MT/month) Sl. No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever









Form-1_DGAJ & LKBB


No n.a.





4.11 Other solid wastes Nil n.a. 5. Release of pollutants or any hazardous, toxic or noxious substances to air (Kg/hr)

Sl.

No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever




5.2

Emissions from production processes Yes If the well is hydrocarbon bearing during production testing flaring

of well fluids. This process will be for one/two days only.






Nil n.a.

5.6 Emissions from incineration of waste Nil n.a

Form-1_DGAJ & LKBB

5.7 Emissions from burning of waste in open air (e.g. slash materials, construction debris)

Nil n.a.



Sl. No.

Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever possible) with source of information data with source of information data









7. Risks of contamination of land or water from releases of pollutants into the ground or into sewers, surface waters, groundwater, coastal waters or the sea:

Sl.

No. Information/Checklist confirmation Yes/No Details thereof (with approximate

quantities/rates, wherever possible) with source of information data

7.1 From handling, storage, use or spillage of hazardous materials No All effluents will be confined within impermeable waste pits

Form-1_DGAJ & LKBB




No n.a.





Sl. No.

Information/Checklist confirmation Yes/No

Details thereof (with approximate quantities/rates, wherever possible) with source of information data


Nil n.a.



No n.a.


9. Factors which should be considered (such as consequential development) which could lead to environmental effects or the potential for cumulative impacts with other existing or planned activities in the locality


Form-1_DGAJ & LKBB


Yes



No n.a.




III. Environmental Sensitivity: Sl.

No. Areas Name/

Identity Aerial distance (within 15 km.) Proposed project

location boundary


None n.a.


None n.a.


Nil n.a.

4 Inland, coastal, marine or underground waters Nil n.a.



None n.a.

Form-1_DGAJ & LKBB

7 Defence installations None n.a.

8 Densely populated or built-up area None n.a


None n.a


None n.a.


N/A n.a.


Nil n.a.

IV. Proposed Terms of Reference for EIA studies 15. Project techno-economic feasibility report. 16. Justification for locations considered for exploratory drilling 17. Baseline studies for Air / water quality in the proposed exploratory drilling locations. 18. Site specific data collection for air / water quality within the vicinity of the drill site (5 km. radius) 19. Socio-economic impact of exploratory drilling activity. 20. Identification of environmental impacts and mitigation measures 21. Environment management plan for the proposed drilling.

I hereby give undertaking that the data and information given in the application and enclosures are true to the best of my knowledge and belief and I am aware that if any part of the data and information submitted is found to be misleading at any stage the project will be rejected and clearance give, if any to the project will be revoked at our risk and cost.


Date: Block Manager Place: Jorhat

Form-1_DGAJ & LKBB



ORGANISE HEAD COUNT

EVACUATE THE SITE

BLOW OUT


FOR MINOR INJURIES



EVACUATE SITE


GAS OIL

SPRAY WATER

WAIT FOR FURTHER

INSTRUCTIONS WAIT FOR INSTRUCTIONS


TALLIED?

FIRST AID

Yes No


BASE RADIO ROOM





M.R.O. OFFICE

STATE FIRE DEPT.

R.C.M.T.

S.E.M.

SECURITY


ON SITE MEETING



TASK FORCE

ENGINEERING

RELIEF WELL TEAM

SUPPORT SERVICES





O.N.G.C.

OUT SIDE

EXPERTS





SECONDARY RESPONSE

O.N.G.C.

OUT SIDE

O.N.G.C.

OUT SIDE


Form-1_DGAJ & LKBB

APPENDIX-I (See paragraph – 6)

FORM 1

I. Basic Information:

Serial No.

Item Detail

1. Name of the project/s Drilling of Exploratory two exploratory wells in Lakwa ML area, Sivasagar District, Assam.

MOPNG, Govt of India, Award of ML, Letter No. F. No.0-12012/101/2003-ONG-III, dated 15th July-2009

PEM, Govt of Assam, Award of PML, Letter No. PEM.7/2006/41, dated 3rd August 2006.


3. Proposed Capacity/area/length/tonnage to be handled/command area/lease area/number of wells to be drilled


Target Depth (meters) MSL

District

1. DGAJ 3300m Sivasagar

2. LKBB 3300m Sivasagar

4. New/Expansion/Modernization New



Form-1_DGAJ & LKBB

7. Does it attract the general condition? If yes, please specify. No

8. Does it attract the specific condition? If yes, please specify. No

9. Location 1.) DGAJ

Plot/Survey/Khasra No Coordinates of Surface Position: Latitude: 260 58’14.69’’N Longitude: 940 46’34.70’’E;

Dag no. 310,304,342,312,403,401,400,402, 399 Patta No. 35,1,71,84,32,26, and 31

Village/Area Village -Jojoli Gaon,

Mouza – Silakuti/Mahmora

Tehsil Revnue Circle - Sonari

District Sivasagar

State Assam

Nearest railway station/airport along with distance in kms. Simaluguri Town railway station is approximately 14 km, Jorhat Airport (Assam) is at a distance of approximately 75 km.




Village Panchayat – Disangpani, ZP – Rangoli P.O.-Moranjan via Sepon

Ph . No 9954185700

Form-1_DGAJ & LKBB

Location 2.) LKBB

Plot/Survey/Khasra No Coordinates of Surface Position: Latitude: 270 01’ 41.296’’N Longitude: 940 49’ 53.111’’E

Village/Area Village – Kotoky Papong

Mouza - Khaloighugura

Tehsil Revenue Circle Mahmora

District Sivasagar.

State Assam

Nearest railway station/airport along with distance in kms. Lakwa Town railway station in Assam approximately 16 km, Jorhat Airport (Assam) is at a distance of approximately 75 km.




Village Panchayat – Nij Khaloighugura ZP – Lakwa PO –Dhitaipukhuri, PIN-785685 PH. No.-9577172208



Form-1_DGAJ & LKBB

12. Address for correspondence Luit Bhawan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704

Name C. Mahapatra


Address Luit Bhavan, ONGC, Cinnamara Complex, Cinnamara, Jorhat-785704

Pin Code 785704



Fax No 0376-2360012


N/A



N/A



Form-1_DGAJ & LKBB


(g) The Forest(Conservation) Act, 1980 (h) The Wildlife (Protection) Act,1972 (i) The C.R.Z Notification


19. Whether there is any Government Order/Policy relevant/relating

to the site No



(g) Name of the Court (h) Case No (i) Orders/ directions of the Court, if any and its relevance

with the project

None

II. Activity


Sl. No.




1.2 Clearance of existing land, vegetation and buildings? Yes Site leveling and fencing


Form-1_DGAJ & LKBB









1.9 Underground works including mining or tunneling? Yes Drilling will ranges from 3000 m up to 4000 m depth (Tentative).




1.13 Production and manufacturing processes? No n.a




1.16 Facilities for long term housing of operational workers? No Rig workers are operating on 14 days on/off pattern from their respective hometowns.

Form-1_DGAJ & LKBB


No n.a


Yes



No

n.a

1.20 New or diverted transmission lines or pipelines? No n.a


No n.a





No n.a




No n.a


No n.a


No n.a


1.30 Loss of native species or genetic diversity? No n.a


Form-1_DGAJ & LKBB

11. Use of Natural resources for construction or operation of the Project (such as land, water, materials or energy, especially any resources which are non-renewable or in short supply):

Sl.

No. Information / checklist confirmation Yes / No Details thereof (with approximate quantities /rates,

wherever possible) with source of information data

2.1 Land especially undeveloped or agricultural land (ha) yes 100m x100m, agricultural land.

2.2 Water (expected source & competing users) unit: KLD Yes 20-25 M3 / day for Drilling and domestic purpose




2.5





No n.a

12. Use, storage, transport, handling or production of substances or materials, which could be harmful to human health or the environment or raise concerns about actual or perceived risks to human health.

Sl. No.





Form-1_DGAJ & LKBB


No n.a


No n.a


No n.a


13. Production of solid wastes during construction or operation or decommissioning (MT/month) Sl. No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever










No n.a.



Form-1_DGAJ & LKBB



4.11 Other solid wastes Nil n.a. 14. Release of pollutants or any hazardous, toxic or noxious substances to air (Kg/hr)

Sl.

No. Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever




5.2

Emissions from production processes Yes If the well is hydrocarbon bearing during production testing flaring

of well fluids. This process will be for one/two days only.






Nil n.a.

5.6 Emissions from incineration of waste Nil n.a 5.7 Emissions from burning of waste in open air (e.g.

slash materials, construction debris) Nil n.a.



Form-1_DGAJ & LKBB

Sl. No.

Information/Checklist confirmation Yes/No Details thereof (with approximate quantities/rates, wherever possible) with source of information data with source of information data









16. Risks of contamination of land or water from releases of pollutants into the ground or into sewers, surface waters, groundwater, coastal waters or the sea:

Sl.

No. Information/Checklist confirmation Yes/No Details thereof (with approximate

quantities/rates, wherever possible) with source of information data

7.1 From handling, storage, use or spillage of hazardous materials No All effluents will be confined within impermeable waste pits




No n.a.


Form-1_DGAJ & LKBB




Sl. No.

Information/Checklist confirmation Yes/No

Details thereof (with approximate quantities/rates, wherever possible) with source of information data


Nil n.a.



No n.a.


18. Factors which should be considered (such as consequential development) which could lead to environmental effects or the potential for cumulative impacts with other existing or planned activities in the locality



Yes


Form-1_DGAJ & LKBB


No n.a.




III. Environmental Sensitivity:

Sl. No.

Areas Name/ Identity

Aerial distance (within 15 km.) Proposed project location boundary


None n.a.


None n.a.


Nil n.a.

4 Inland, coastal, marine or underground waters Nil n.a.



None n.a.

7 Defence installations None n.a.

8 Densely populated or built-up area None


None

Form-1_DGAJ & LKBB


None n.a.


N/A n.a.


Nil n.a.

IV. Proposed Terms of Reference for EIA studies 22. Project techno-economic feasibility report. 23. Justification for locations considered for exploratory drilling 24. Baseline studies for Air / water quality in the proposed exploratory drilling locations. 25. Site specific data collection for air / water quality within the vicinity of the drill site (5 km. radius) 26. Socio-economic impact of exploratory drilling activity. 27. Identification of environmental impacts and mitigation measures 28. Environment management plan for the proposed drilling.

I hereby give undertaking that the data and information given in the application and enclosures are true to the best of my knowledge and belief and I am aware that if any part of the data and information submitted is found to be misleading at any stage the project will be rejected and clearance give, if any to the project will be revoked at our risk and cost.


Date: Block Manager Place: Jorhat

Form-1_DGAJ & LKBB



ORGANISE HEAD COUNT

EVACUATE THE SITE

BLOW OUT


FOR MINOR INJURIES



EVACUATE SITE


GAS OIL

SPRAY WATER

WAIT FOR FURTHER

INSTRUCTIONS WAIT FOR INSTRUCTIONS


TALLIED?

FIRST AID

Yes No


BASE RADIO ROOM





M.R.O. OFFICE

STATE FIRE DEPT.

R.C.M.T.

S.E.M.

SECURITY


ON SITE MEETING



TASK FORCE

ENGINEERING

RELIEF WELL TEAM

SUPPORT SERVICES





O.N.G.C.

OUT SIDE

EXPERTS





SECONDARY RESPONSE

O.N.G.C.

OUT SIDE

O.N.G.C.

OUT SIDE


FOR DRILLING TWO EXPLORATORY WELLS - Welcome...

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