KERALA-KONKAN OFFSHORE BASIN
11
KERALA-KONKAN OFFSHORE BASIN 1. BASIN AREA : 580,000 Sq. Km. 1.1 BASIN LOCATION MAP : Refer Sedimentary Basin Map of India in Notice Inviting Offers (NIO) 2. EXISTING DATA BASE 2.1 SEISMIC DATA 2D 146,445 LKM 3D 9,730 Sq. Km. Data acquired by 2D (LKM) 3D (Sq. Km.) DGH 10,218 - ONGC 110968 5490 Pvt./JV 25259 4239 2.2 OTHER SURVEYS : Gravity - 44607 stations Magnetic - 73410 stations Satellite Gravity Survey 2.3 WELL DATA Number of Exploratory Wells : 15 Hydrocarbon Shows : Gas shows in Miocene carbonates and sandstones in 3 wells, and in Cretaceous sandstones in 1 well 3. BLOCKS ON OFFER : 2 blocks in deep waters KK-DWN-2005/1 KK-DWN-2005/2 4. BASIN TYPE : Passive continental margin basin 5. PROVEN SEDIMENTARY SECTION: Age range Thickness (m) Cretaceous-Recent > 5,500
Transcript of KERALA-KONKAN OFFSHORE BASIN
KERALA-KONKAN OFFSHORE BASIN
1. BASIN AREA : 580,000 Sq. Km.
1.1 BASIN LOCATION MAP : Refer Sedimentary Basin Map of India in Notice Inviting Offers (NIO)
2. EXISTING DATA BASE
2.1 SEISMIC DATA 2D 146,445 LKM 3D 9,730 Sq. Km.
Data acquired by 2D (LKM) 3D (Sq. Km.)
DGH 10,218 -
ONGC 110968 5490
Pvt./JV 25259 4239
2.2 OTHER SURVEYS : Gravity - 44607 stations Magnetic - 73410 stations Satellite Gravity Survey
2.3 WELL DATA Number of Exploratory Wells : 15 Hydrocarbon Shows : Gas shows in Miocene carbonates and sandstones in 3 wells, and in Cretaceous sandstones in 1 well
3. BLOCKS ON OFFER : 2 blocks in deep waters KK-DWN-2005/1 KK-DWN-2005/2
4. BASIN TYPE : Passive continental margin basin 5. PROVEN SEDIMENTARY SECTION:
Age range Thickness (m)
Cretaceous-Recent
> 5,500
5.1 GENERALISED STRATIGRAPHIC SEQUENCE
5.2 REPRESENTATIVE GEOLOGICAL SECTION
1
AGE
CRETACEOUS
RECENT -PLIOCENE
MIOCENE
EOCENEPALEOCENE
CEN
OZO
IC
THICK(M) LITHOLOGY SOURCE RES. SEAL
1200
1150
1200
1000
OIL ANDGAS SHOWS
1. TOC : >1%VRo : 0.5-1.0%KEROGENType : I,II & III
2. TOC : 2-10%VRo : MATUREKEROGENType : III
3. TOC : 1.8-10%VRo : >0.50%KEROGENType : I, II & III
LIMESTONE
SANDSTONE
ME
SO-
ZOIC COAL
OLIGOCENE 1000
2
3
SHALE
SANDYCLAYSTONE
6. PETROLEUM GEOLOGY
EXPECTED RESERVOIRS : Carbonates in Eocene to Middle Miocene sequences Sandstones in Paleocene to Middle Miocene sequences
EXPECTED SOURCE ROCKS : Paleocene to Middle Eocene shales.
EXPECTED CAP ROCKS : Intraformational shales & tight limestone bands in Eocene to Middle Miocene sequences.
7. EXPECTED PLAY TYPES
(i) Structural highs
(ii) Carbonate buildups
(iii) Turbidites and distal fans.
BLOCKS ON OFFER
LOCATIONS OF THE BLOCKS
BLOCK : KK-DWN-2005/1 1. BLOCK AREA : 14,674 Sq. Km. ( Approx.) 2. WATER DEPTH RANGE : 400 m to 2000 m. 3. EXISTING DATA BASE
3.1 SEISMIC DATA : 2D - 580 LKM
Vintage Data acquired by Quantum in LKM 2002-2003 DGH 212 1995-1996 ONGC 107 1979-1981 ONGC 261
3.2 OTHER SURVEYS : Satellite Gravity Surveys
SEISMIC COVERAGE MAP
SEISMIC COVERAGE MAP
3.3 WELL DATA
Number of Exploratory Well - Nil 4. STRATIGRAPHIC SEQUENCE ENCOUNTERED IN NEARBY WELL
KASARGOD-1
5. DEPTH STRUCTURE MAP ON TOP OF BASEMENT
SOURCE RES. SEAL OIL & GASSHOWS
1.TOC 0.5 – 1.0%VRo 0.7 – 1.0% KEROGEN TYPE II & III
2.TOC 0.5 – 1.0%VRo 0.7 - 0.8%KEROGEN TYPE III & II
2
1
NOTE: SOURCE ROCK DA TA TAKEN FROM ADJOINING AREA
OIL SHOW
GAS SHOW
OIL SHOW
GAS SHOW
6. SOME OF THE INTERPRETED PLAY TYPES
TWT
IN S
EC.
18800 19000 19200SW NEWC-2K2-04
2.6
3.0
3.4
3.8
4.2
MID. EOCENE TOP
MID. MIOCENE TOP
BASEMENT
CARBONATE BUILDUPS
CARBONATE BUILDUPS IN EOCENE SEQUENCE
WC-2K2-24C
TWT
IN S
EC.
NW SE6000 5800 5600
2.2
2.6
3.0
3.4
3.8
4.4
MID. EOCENE TOP
MID. MIOCENE TOP
BASEMENT
STRUCTURAL HIGHS
STRUCTURAL HIGHS IN EOCENE SEQUENCE
4.2
TWT
IN S
EC.
2.0
2.5
3.0
3.5
4.0
4.5
5.0
SW NEKL-95-11C8460 9180
EOCENE TOP
MIOCENE TOP
TRAPS FORMED BY CROSS CUTTING SLIDES
BLOCK : KK-DWN-2005/2 1. BLOCK AREA : 19,226 Sq. Km. ( Approx.) 2. WATER DEPTH RANGE : 1250 m to 2500 m. 3. EXISTING DATA BASE
3.1 SEISMIC DATA : 2D - 792 LKM
3.2 OTHER SURVEYS : Satellite Gravity Surveys
3.3 WELL DATA
Number of Exploratory Well - Nil
SEISMIC COVERAGE MAP
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
3698KL-96-17
5
1753
KL-96-17A
1855
2000
4000
5308
KL-96-17B
10756
11993
KL-96-25 1
1187
RE-23-1
2373
4000
4985
WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
100
00’
740 00’720 30’ 730 00’ 730 30’
090
30’
090
00’
740 00’
720 30’ 730 00’ 730 30’
100
00’
090
30’
090
00’0 20 km.
Scale
SEISMIC COVERAGE MAP
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
3698KL-96-17
5
1753
KL-96-17A
1855
2000
4000
5308
KL-96-17B
10756
11993
KL-96-25 1
1187
RE-23-1
2373
4000
4985
WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
100
00’
740 00’720 30’ 730 00’ 730 30’
090
30’
090
00’
740 00’
720 30’ 730 00’ 730 30’
100
00’
090
30’
090
00’0 20 km.
Scale
4. STRATIGRAPHIC SEQUENCE ENCOUNTERED IN NEARBY WELL DSDP SITE 219
5. TWT MAP ON TOP OF BASEMENT
LATE
EARLY
LATE
EARLY
LATE
LATEOR
MIDDLE
EARLY
LATE
MIDDLE
LATE
EARLY
MIDDLE
EARLY
LATE
PALE
OCE
NEEO
CEN
EM
IOCE
NE
PLIO
CEN
EPL
EIST
.I. LIGHT GRAY TO GREENISH GRAY
DETRITAL SILTY CLAY MANNO OOZE BECOMING DETRITAL CLAY RICH NANNO OOZE IN LOWER PART. FORAM RICH IN UPPER AND LOWER PARTS.
II. WHITE FORAM OOZE/CHALK, NANNO RICH IN UPPER PART
III. WHITEBIOGENICOOZE
a) FORAM NANNO OOZE/CHALK
b) FORAM RICH NANNO MICARB OOZE/CHALK
c) RAD RICH MICARB NANNO OOZE/CHALK
d) NANNO RICH RADMICARB OOZE/CHALK& CHERT
IV. YELLOW GREEN MICARB FORAM CHALK, MICARB RICH FORAM CHALK/OOZE, LIMESTONE, CHERT AND DETRITAL CLAY
a) GRAYISH GREEN LIMESTONE GLAUCONITE BEARING OR RICH
b) YELLOWISH GREEN TO DARK GREEN CALCAREOUS CEMENTED SANDSTONE, SILTSTONE & CLAYEY SILTSTONE, GRAY TO GREENISH BLACK CLAYEY SILT STONE & SILTY SANDSTONE
V.G
REE
N &
BL A
CK
LIM
ESTO
NE
SAN
DST
ON
E A
ND
SIL
T STO
NE
AGE DEPTH( m )
LITHO-LOGY
LITHOLOGICAL UNITS
50
100
150
200
250
300
350
400
DEPTH FROM SEA BOTTOM
F - FORAMINFERA
N - NANNOFOSSILSD - DIATOMSR - RADIOLARIANS
A - ASHZ - ZEOLITE
G - GLAUCONITEAR - ARAGONITE
S - SPONGE SPICULESSI - SILICOFLAGELLATE
DE - DETRITALM - MICARB
- CHERT
(SOURCE : DSDP REPORT, KDMIPE)
CLAY
SILTY CLAY / CLAYEY SILT
SILT
SAMOY SILT OR SILTY SAND
SAND
LIMESTONE
TERRIGENOUS SEDIMENTS
FORAM OOZE
MICARB OOZE
NANNO CHALK
FORAM CHALK
MICARB CHALK
RAD OOZE
SPONGE SPICULES
DIATOMITE
CHERY
NANNO OOZE
ZEOLOITE
GLAUCONITE
PELAGIC CLAY
LEGEND
CLAY
SILTY CLAY / CLAYEY SILT
SILT
SAMOY SILT OR SILTY SAND
SAND
LIMESTONE
TERRIGENOUS SEDIMENTS
FORAM OOZE
MICARB OOZE
NANNO CHALK
FORAM CHALK
MICARB CHALK
RAD OOZE
SPONGE SPICULES
DIATOMITE
CHERY
NANNO OOZE
ZEOLOITE
GLAUCONITE
PELAGIC CLAY
LEGEND
OLI
GO
CEN
EM
IOC
ENE
DSDP - 219
3000
2800
3300
3000
3000
2800
2600
2800
3500
3200
3500
3700
3000
3000
3000
3200
2800
2500
2200
3000
3500
3300
3800
3500
3300
4000
4000
3300
3500
3500
3200
3600
3000
2700
4200
H-1
H-2
L-2
L-1
H-3
L-3
High
LowContour interval 100 millisec.
100
00’
740 00’720 30’ 730 00’ 730 30’
090
30’
090
00’
9000
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
3698KL-96-17
5
1753
KL-96-17A
1855
2000
4000
5308
KL-96-17B
10756
11993
KL-96-25 1
1187
RE-23-1
2373
4000
4985
WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
740 00’720 30’ 730 00’ 730 30’
100
00’
090
30’
090
00’
0 20 km.
Scale
DSDP - 219
3000
2800
3300
3000
3000
2800
2600
2800
3500
3200
3500
3700
3000
3000
3000
3200
2800
2500
2200
3000
3500
3300
3800
3500
3300
4000
4000
3300
3500
3500
3200
3600
3000
2700
4200
H-1
H-2
L-2
L-1
H-3
L-3
High
LowContour interval 100 millisec.
100
00’
740 00’720 30’ 730 00’ 730 30’
090
30’
090
00’
9000
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
3698KL-96-17
5
1753
KL-96-17A
1855
2000
4000
5308
KL-96-17B
10756
11993
KL-96-25 1
1187
RE-23-1
2373
4000
4985
WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
740 00’720 30’ 730 00’ 730 30’
100
00’
090
30’
090
00’
0 20 km.
Scale
6. INTERPRETED PLAY TYPE
STRUCTURAL HIGHS IN EOCENE-MIOCENE SECTION
SW NELINE WC-2K2-02
9000 9250 9500 9750 10000 10250 10500 10750 11000
2.2
TWT
IN
S
ECS.
2.4
2.6
2.8
3.0
SP
MID. MIOCENE TOP
BASEMENT
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
369KL-96-17
5
1753
KL-96-17A
18552000
4000
5308
10756
11993
KL-96-25
1
1187
RE-23-1 2373
4000
4985WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
369KL-96-17
5
1753
KL-96-17A
18552000
4000
5308
10756
11993
KL-96-25
1
1187
RE-23-1 2373
4000
4985WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
WC-2K2-02
STRUCTURAL HIGHS IN EOCENE-MIOCENE SECTION
SW NELINE WC-2K2-02
9000 9250 9500 9750 10000 10250 10500 10750 11000
2.2
TWT
IN
S
ECS.
2.4
2.6
2.8
3.0
SP
MID. MIOCENE TOP
BASEMENT
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
369KL-96-17
5
1753
KL-96-17A
18552000
4000
5308
10756
11993
KL-96-25
1
1187
RE-23-1 2373
4000
4985WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
KL-96-02
1391
2000
2593
KL-96-02A
8035
10000
11773
KL-96-10
2273
369KL-96-17
5
1753
KL-96-17A
18552000
4000
5308
10756
11993
KL-96-25
1
1187
RE-23-1 2373
4000
4985WC-2K2-02
8570
10000
12000
14000
15814
WC-2K2-22
16584
16000
14000
12000
11725
WC-2K2-02
