Safety Management in Nfld Offshore - Memorial University · PPT file · Web...

Offshore Drilling Operations

Jeff BugdenCanada-Newfoundland Offshore Petroleum Board

Outline Project Management & EngineeringProject Management & Engineering Equipment and SystemsEquipment and Systems Typical Offshore Drilling ProgramTypical Offshore Drilling Program Operational ConsiderationsOperational Considerations

Atlantic Basins

TERRA NOVA FACILITIESCONCEPTUAL LAYOUT

Source: Petro-Canada, 1997

Ice Bergs

Glory Holes

Glory Holes - Dredging

Terra Nova FPSO

HIBERNIA PRODUCTION SYSTEM

Drilling Installations

Nomenclature

BHABHA

MudloggingMudlogging

SCSSVSCSSV

BOPBOP

LWDLWD

CTCT

KOPKOP

MWDMWD

FishingFishing

TopdriveTopdrive

Xmas treeXmas tree

SidetrackingSidetracking

LoggingLogging

MDTMDT

KickKick WellheadWellhead

Part 1 - Project Management & Engineering Considerations Drilling InstallationDrilling Installation Well DesignWell Design Contracting and ProcurementContracting and Procurement Casing, Cementing, Drilling FluidsCasing, Cementing, Drilling Fluids

Drilling Installation

Drilling Installation

Geological Prospect (well depth, pressures)

Environmental Factors (weather, ice, water depth, station keeping)

Regulatory Requirements

Solids Control

Pipe Handling Eqpt

Well Control Equipment

Rated Drilling Depth

Power Requirements (hoisting equipment, mud pumps, rotary system)

Conceptual Well Design

Well Design

Geological Objectives

Evaluation Objectives

Drilling Hazards

Formation Pressures

“Problem” Zones

Offset Well Data

Time Estimate

Cost Estimate

$$ BUDGET $$

Casing Program

Casing Design

Geological Objectives

Evaluation Objectives

Testing Program

Overpressure Zones

Fracture Pressures

Lost Circulation Zones

Detailed Design

(Burst, Collapse, Tensile, Wear, H2S)

Grade, Weight, Connectors, Setting Depth


Cementing Program

Cementing

Temperatures

Fracture Pressures


Zone Isolation

Well Abandonment

Well Control

Detailed Design

Cement tops, recipes, slurry properties, additives, displacement rates, centralization, equipment &

procedures


Drilling Fluids Program

Drilling Fluids

Wellbore Stability

Formation Protection

Formation Evaluation

Equipment Compatibility


Well Control

Recommendations

Type, desired physical and chemical properties, solids control requirements

Torque and Drag

Directional Drilling Program

Directional Program

Current Targets

Future Targets

Formations

Faults

Dip

Torque and Drag

Recommendations

Type of Curve, KOP, BUR, DOR, BHA, Directional Drilling Assembly, MWD Equipment

Bit Program

Bit Program

Lithology (well logs)

Compressive Strength

Abrasiveness

Stickiness

Offset Bit Records

Economics

Recommendations

Bit Types (Roller Cone or PDC), Hydraulics (Nozzles), Motor/Turbine Drilling, WOB, RPM

PDC/Roller Cone Bits

Part 2 - Equipment & Systems

Circulating SystemCirculating System Motion Compensation EquipmentMotion Compensation Equipment Drilling AssemblyDrilling Assembly Hoisting SystemHoisting System Well Control SystemWell Control System

Motion Compensators

Marine Riser

Drilling Assembly

Drawworks

Crown Block

Top Drive

Drill Floor

Iron Roughneck

Mud Pumps

Drillers Cabin

Well Control System - BOP Stack

BOP Control System

Part 3 - Typical Drilling Program

Assumptions: Semisubmersible Anchored 100 metre water depth

Typical Drilling Program

Position rig.Position rig. Run Anchors.Run Anchors. Pretension mooring lines.Pretension mooring lines. Survey seafloor with ROV.Survey seafloor with ROV.


Run TGB.Run TGB. Spud well.Spud well. Drill 36” (914mm) hole to 200 metres.Drill 36” (914mm) hole to 200 metres. Run and cement 30” (762mm) Run and cement 30” (762mm)

conductor pipe with PGB and low conductor pipe with PGB and low pressure wellhead housing.pressure wellhead housing.


Drill 26” (660mm) hole to 500 Drill 26” (660mm) hole to 500 metres.metres.

Run and cement 20” (508mm) Run and cement 20” (508mm) surface casing with high pressure surface casing with high pressure wellhead housing.wellhead housing.

Run BOP stack and marine riser.Run BOP stack and marine riser.


Drill 17 1/2” (445mm) hole to Drill 17 1/2” (445mm) hole to 1,500 metres.1,500 metres.

Run wireline logs.Run wireline logs. Run and cement 13 3/8” Run and cement 13 3/8”

(340mm) casing.(340mm) casing.


Drill 12 1/4” (311mm) hole to 3,000 Drill 12 1/4” (311mm) hole to 3,000 metres.metres.

Core any hydrocarbon intervalsCore any hydrocarbon intervals Run wireline logs.Run wireline logs. Run and cement 9 5/8” (244mm) Run and cement 9 5/8” (244mm)

casing.casing.


Drill 8 1/2” (216mm) hole to 3,500 Drill 8 1/2” (216mm) hole to 3,500 metres.metres.

Core any hydrocarbon intervalsCore any hydrocarbon intervals Run wireline logs.Run wireline logs. Run and cement 7” (178mm) liner (if Run and cement 7” (178mm) liner (if

well is to be tested).well is to be tested).

Part 4 - Operational Considerations Heavy WeatherHeavy Weather

Marine ForecastsMarine Forecasts Operational LimitsOperational Limits

Ice BergsIce Bergs T-TimeT-Time Ice ManagementIce Management

Forecasts

Wind SpeedsWind Speeds WavesWaves HeaveHeave Pitch and RollPitch and Roll

A low pressure trough that passed the forecast waters last night will continue moving eastward into the North Atlantic this morning. Following it, a ridge extending northward from a high centre currently near Sable Island will track eastward and pass through thearea this evening. Winds will diminish to variable light as the high centre nears and change to moderate southerlies behind it. A newfrontal trough developing over western Ontario is expected to work eastward across Newfoundland late Friday or early Saturday andwill pass through the site near noon on Saturday. Strong SSE to SSW winds will prevail over the forecast waters as this frontaltrough approaches. To the south, a weak wave will develop and move northeastward pushing an associated warm front towards thearea. Mist and fog are expected to develop late on Friday under these systems.

MARINE WEATHER SITE FORECAST

SCT/BKN SCT/BKN FEW/SCT FEW/SCT SCT/BKN BKN/OVC BKN/OVCOVC

OCNLOBSC

OVCOCNLOBSC

6+ 6+ 6+ 6+ 6+6+

OCNL2 - 5

6+VRBL1 - 5

1 - 5OCNL

1/4 - 1/2

1 - 5OCNL

1/4 - 1/2

NIL NIL NIL NIL NIL OCNLMIST

VRBLMIST

MISTOCNL R-OCNL F

MISTOCNL R-OCNL F

SKY COVER

WEATHER

VISIBILITY (nm)

WARNINGS IN EFFECT: NONESYNOPSIS

with a long range forecast for the following 3 days.

Forecast for the Glomar Grand Banks at Hebron M-04 near 46 34 N 48 31 W issued by OCEANS Ltd., St. John'sat 0600Thursday May 4 2000 Saturday , valid until 0930 NDTNDT

VALID DATE / TIME

0930/12Z 1530/18Z 2130/00Z 0330/06Z 0930/12Z 1530/18Z 2130/00Z 0330/06Z 0930/12ZTIME (NDT/UTC)

THU MAY 04

THU MAY 04

THU MAY 04

FRI MAY 05

FRI MAY 05

FRI MAY 05

FRI MAY 05

SAT MAY 06

SAT MAY 06DAY / DATE

WIND WAVES

PRIMARY / SECONDARY SWELL

COMBINED SEA

NIL NIL NIL NIL NIL NIL NIL NIL NIL

2 2 1 1 2 4 5 4 4

10 METRE MEAN (kt)Anemometer MEAN (kt)Anemometer MAX (kt)

14 11 7 13 14 22 23 22 2020 17 13 19 20 28 28 28 26

SIG HEIGHT (m)PERIOD (s)

1.2 1.0 0.3 0.5 0.6 0.9 1.2 1.0 1.04 4 2 3 3 3 4 4 4

DIRECTION (true)HEIGHT (m)

PERIOD (s)

240/270 240/270 340/240 340/300 330/290 320/290 310 310/150 150/200

1.5/1.2 1.5/1.2 2.0/1.0 1.8/1.2 1.5/1.2 1.5/0.8 1.3 1.0/1.0 1.0/1.08/7 8/7 9/7 9/8 8/8 8/8 8 7/7 7/7

SIG HEIGHT (m)MAX HEIGHT (m)

2.3 2.2 2.3 2.2 2.0 1.9 1.8 1.7 1.74.0 3.5 4.0 4.0 3.5 3.0 3.0 3.0 3.0

TEMPERATURE (C)PRESSURE (mb)

FREEZING SPRAY

11 9 5 11 12 15 15 15 13WIND SPEED

330 310 VRBL 190 170 150 150 200 230WIND DIRECTION (t)

1030 1031 1031 1030 1028 1024 1018 1016 1014

LONG RANGE FORECAST

Phone: (709) 753 2482 / (709) 753 5788; Fax: (709) 753 5972 / (709) 753 5211 (from offshore); Email: [email protected]

1.5 - 2.0 1.5 - 2.5 2.0 - 2.5 2.5 - 3.5 2.0 - 3.0 1.5 - 2.5BCMG GOOD GOOD OCNL FAIR FAIR OCNL POOR BCMG GOOD GOOD GOOD

VALID DAY / DATE

VALID PERIODWIND DIRECTION (t)10 m WIND SPEED (kt)COMB WAVE HGT(m)VISIBILITY

SAT MAY 06 SUN MAY 07 SUN MAY 07 MON MAY 08 MON MAY 08 TUE MAY 09PM AM PM AM PM AM

W - SW BCMG NLY N TO NE NE NLY N TO NW NW TO SW10 - 15 10 - 20 10 - 20 20 - 30 15 -25 10- 25

J BNext Regular Forecast issued: Forecast number . 06040500Prepared by: AO.1800 NDT TODAY

48 HOUR FORECAST WIND SPEEDS

0

10

20

30

40

50

60

70

80

0930/12ZTHU

MAY 04

1530/18ZTHU

MAY 04

2130/00ZTHU

MAY 04

0330/06ZFRI

MAY 05

0930/12ZFRI

MAY 05

1530/18ZFRI

MAY 05

2130/00ZFRI

MAY 05

0330/06ZSAT

MAY 06

0930/12ZSAT

MAY 06

SPEE

D (K

TS)

10m Flag

STORM

GALE

Max Wind

Anemo

10m Wind

Wind Speeds

SPECTRAL HEAVE PREDICTION FOR DAYS 1 AND 2;LINEAR REGRESSION HEAVE FORECAST FOR DAYS 3, 4, & 5

at Standard Operating Draft; Rig heading 290oT

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

0930/12ZTHU

MAY 04

2130/00ZTHU

0930/12ZFRI

2130/00ZFRI

0930/12ZSAT

2130/00ZSAT

0930/12ZSUN

2130/00ZSUN

0930/12ZMON

2130/00ZMON

0930/12ZTUE

Date / Time

HEA

VE

(m)

Maximum Predicted HeaveForecast HeaveMinimum Predicted heave

Heave

OPERATION

TotalHeave

m

Pitch & RollSingle Amplitude

deg,

Offset BallJoint Angle

deg.Drilling/Tripping 5.0 5.0 4.0

Casing/Cementing 3.0 4.0 3.0

Running BOP 1.5 2.0 N/A

Hang-Off 5.0 5.0 4.0

Disconnect Riser 6.0 N/A 8.0

Logging 4.0 N/A 4.0

Well Testing 3.0 4.0 3.0

Survival Conditionincluding 1/3 anchor chaintension

De-ballast to survival draft of 17m to increase airgap

Evacuation when 90% of vessels design criteria is expected to bereached

Jeanne d’Arc Basin Operations - Floating Operations Manual

Safe Operational Limits

T-Time

Ice Management

Concluding Comments

THE END

Safety Management in Nfld Offshore - Memorial University · PPT file · Web...

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