Indian IOR/EOR Experience, Petroleum Federation of India, New Delhi, April 2010. Conference on IOR-EOR Challenges. Presented by: S. K Verma, Subsurface Manager, Mumbai High Asset, ONGC Mumbai

1. 1
‘
‘Showcasing Indian fields
Showcasing Indian fields –
– Offshore
Offshore’
’
S. K. Verma
Sub-surface Manager
Mumbai High Asset, ONGC Mumbai
April 15, 2010
Petroleum Federation of India (PETROFED)
New Delhi
Conference on
IOR-EOR : Challenges, Process and Technologies
Session 1 : Indian IOR/ EOR Experience

2. 2
y
y Introduction
Introduction
y
y Mumbai Offshore Basin
Mumbai Offshore Basin
y
y Field Development challenges
Field Development challenges
y
y Major IOR/EOR Projects
Major IOR/EOR Projects
y
y IOR/EOR Experience
IOR/EOR Experience
y
y Process and Technologies
Process and Technologies
y
y Way Forward
Way Forward
Presentation Structure

3. 3
0
20
40
60
80
100
120
140
160
ONGC Western Offshore
Crude Oil Production, MMT Natural Gas Production, BCM
Oil & Gas Production during XI Plan Period
Oil & Gas Production during XI Plan Period
140.06
112.39 BCM
87.24
76.91 BCM

4. 4
Mumbai Offshore Basin
y Formed due to extensional
tectonics at the time of rifting of
the Indian plate from Madagascar
during late Jurassic-early
Cretaceous period
y Covers about 148,000 km2 from
coast to 200m isobath
y Divided into 6 tectonic blocks
y Mature source rocks present in
lower Eocene-Paleocene Panna
formation
y Hydrocarbons established in
multiple pay zones in this basin –
ranging from fractured basement
to middle Miocene
y The extensive post-Miocene shale
acts as the regional ‘cap-rock’.
Surat depression
P
a
n
n
a
d
e
p
re
s
s
io
n
R
a
tn
a
d
e
p
re
s
s
io
n
B
o
m
b
a
y
p
l
a
t
f
o
r
m
Evidence from radiometric dating
indicated that the Earth is about
4.570 billion years old

5. 5
SURAT
NORTH TAPTI
MID TAPTI
SOUTH TAPTI
SD-4
C-24
C-26A
DAHANU
CD
SD-1
SD-14
C-22
CA
DAMAN
B-55
B-163
B-15
B-
188
B-48
B-46
B-45
D-12
B-192A
B-192
B-121
B-119
PANNA
VASAI
MUKTA
D-1
D-18
B-80
NEELAM
HEERA
R-15A
B-147
B-51 MUMBAI
MUMBAI HIGH
OIL FIELD
GAS FIELD
LEGEND
Major Oil & Gas fields of Mumbai Offshore
VASAI EAST
Main structures delineated
in the Mumbai Offshore
Basin
Mumbai High, Ratna,
Heera, Panna, Vasai,
Neelam, Mukta, Tapti, and
other small structures
Success expanded to East
Coast with discovery of oil
& gas in Godavary,
Cauvery offshore
M R83 H84 P86 V88 NM90

6. 6
Mumbai High Field
(As on 01.04.2010)
IOIP, MMt 1659
Cumulative Oil, MMt 411
Recovered, % 25
Oil rate, bopd 2,25,000
Water Injection, bwpd 9,00,000
Water-cut,% 69
Platforms 113
Producing strings 727
Gas producers 36
Water injection strings 198

7. 7
Heera
(As on 01.04.2010)
IOIP, MMt 305
Cumulative Oil, MMt 55
Recovered, % 18
Oil rate, bopd 56,000
Water Injection, bwpd 1,46,000
Water-cut,% 56
Platforms 19
Producing strings 161
Gas producers 7
Water injection strings 58
SURAT
NORTH TAPTI
MID TAPTI
SOUTH TAPTI
SD-4
C-24
C-26A
DAHANU
CD
SD-1
SD-14
C-22
CA
DAMAN
B-55
B-163
B-15
B-
188
B-48
B-46
B-45
D-12
B-192A
B-192
B-121
B-119
PANNA
VASAI
MUKTA
D-1
D-18
B-80
NEELAM
HEERA
R-15A
B-147
B-51 MUMBAI
MUMBAI HIGH
OIL FIELD
GAS FIELD
LEGEND

8. 8
Neelam
(As on 01.04.2010)
IOIP, MMt 109
Cumulative Oil, MMt 29
Recovered, % 26
Oil rate, bopd 20,000
Water Injection, bwpd 97,000
Water-cut, % 85
Platforms 13
Producing strings 72
Water injection strings 23
SURAT
NORTH TAPTI
MID TAPTI
SOUTH TAPTI
SD-4
C-24
C-26A
DAHANU
CD
SD-1
SD-14
C-22
CA
DAMAN
B-55
B-163
B-15
B-
188
B-48
B-46
B-45
D-12
B-192A
B-192
B-121
B-119
PANNA
VASAI
MUKTA
D-1
D-18
B-80
NEELAM
HEERA
R-15A
B-147
B-51 MUMBAI
MUMBAI HIGH
OIL FIELD
GAS FIELD
LEGEND

9. 9
Bassein
(As on 1.4.2010)
IGIP, BCM : 339
Cumulative Gas, BCM : 187
Recovered, % : 55
Gas rate, MMSCM : 28.2
Number of platforms : 6
Producing gas wells : 49
Producing oil wells : 5
SURAT
NORTH TAPTI
MID TAPTI
SOUTH TAPTI
SD-4
C-24
C-26A
DAHANU
CD
SD-1
SD-14
C-22
CA
DAMAN
B-55
B-163
B-15
B-
188
B-48
B-46
B-45
D-12
B-192A
B-192
B-121
B-119
PANNA
VASAI
MUKTA
D-1
D-18
B-80
NEELAM
HEERA
R-15A
B-147
B-51 MUMBAI
MUMBAI HIGH
OIL FIELD
GAS FIELD
LEGEND

10. 10
0
5
10
15
20
25
1976-77
1979-80
1982-83
1985-86
1988-89
1991-92
1994-95
1997-98
2000-01
2003-04
2006-07
2009-10
O
il,
M
M
t
MH HEERA NEELAM B-173 D1 VASAI EAST
Annual oil production from MR fields

11. 11
Initiatives: IOR/ EOR
Initiatives: IOR/ EOR
IOR/EOR Schemes in 15 major fields of ONGC have been
under implementation since 2001
IOR/ EOR campaign & redevelopment projects with
investment more than Rs 30,000 Crores
This initiative has helped to arrest the natural decline to
great extent and raised the recovery factor from these
fields from 27.5% in 2001 to 32.5% in 2009.

12. 12
Challenges, Process &
Challenges, Process &
Technologies
Technologies

13. 13
y Matured fields
y Complex reservoirs
◦ Large area, shallow
reservoirs
◦ Heterogeneous
◦ Multilayered
◦ Gas cap
◦ Thin sweet zones
◦ Drilling complications
y Water cut increasing
y Aging facilities
Western offshore challenges

14. 14
Multi-layers of Mumbai High
(a) Stratigraphic Sequence in Mumbai High Field
LIII reservoir
-multilayered with shale, limestone,
sequence
-holds about 94% of the total IOIP
Oil reservoirs :
L I, LII, LIII, LIV, LV, Basal Clastics and fractured Basement
Gas reservoir :
S1
(b) Sub-Layers of L-III Reservoir

15. 15
Porosity Permeability -derived
Geological Cross Sections Showing Layer wise
Porosity and Permeability Distribution
Fracs, vugs, channels, tight zones

16. 16
0
50000
100000
150000
200000
250000
300000
350000
400000
450000
500000
Mar-76
Mar-78
Mar-80
Mar-82
Mar-84
Mar-86
Mar-88
Mar-90
Mar-92
Mar-94
Mar-96
Mar-98
Mar-00
Mar-02
Mar-04
Mar-06
Mar-08
Mar-10
Oil,
BOPD
0
100
200
300
400
500
600
700
800
No
of
Strings
Initial Development
WI, ADBHN & AORP
EORP in
South & L-II
BHN Accident
Re-dev-Ph-I
,
Addl
dev
in
A1
Gas Lift
Re-dev-Ph-II
PPM
Proj,
CRMP-I
&
II
Mumbai High Development History

17. 17
Renewed Development Strategy
y Review field development/ redevelopment
◦ Integration of data
◦ More accurate modeling
◦ MDT approach
◦ Target bypassed oil zones/ patches /
◦ Infill drilling
◦ Well completion
◦ Re-oriented drainage pattern
y Best in class technology induction
y Domain experts
y Improved production practices
◦ Conservation of reservoir energy
◦ Adequate energy replenishment
◦ Efficient artificial lift system
◦ Integrated asset model approach
y Projectised IOR / Redevelopment
y EOR pilots

18. 18
0.0
5.0
10.0
15.0
20.0
25.0
8
0
-
8
1
8
2
-
8
3
8
4
-
8
5
8
6
-
8
7
8
8
-
8
9
9
0
-
9
1
9
2
-
9
3
9
4
-
9
5
9
6
-
9
7
9
8
-
9
9
0
0
-
0
1
0
2
-
0
3
0
4
-
0
5
0
6
-
0
7
0
8
-
0
9
1
0
-
1
1
1
2
-
1
3
1
4
-
1
5
1
6
-
1
7
1
8
-
1
9
2
0
-
2
1
2
2
-
2
3
2
4
-
2
5
2
6
-
2
7
2
8
-
2
9
M
M
t
0
10
20
30
40
50
60
70
80
90
100
P
e
rc
e
n
ta
g
e
40% Rec plan Revised FR Phase II
% recovery Water Cut %
25%
411 MMt
Life cycle rolling development plan approach
Rolling development plan to be conceived based on experience and new data of each plan and
induction of evolving technologies

19. 19
Challenge
y To locate by passed oil
in highly
heterogeneous
Carbonate Reservoir
Approach
y Improved modeling
through Seismic to
Simulation
y Integration
-140
-1400
-
1
4
0
0
-
1
3
5
0
-1350
1
1Z
2
3
3Z
4
5
5Z
6
6Z
7
7Z
8H
9
9Z
1
2
3
4
5
6
7H
8H
9
7P
2Z
8P
1
2
3
4
5
6
7
1
5
6
7
8
1
2
3
4
5
6
7
8 9
2Z
8Z
1
2
3
4
5
6
7
8
9
1Y
1Z
2Z
3Z
6Z
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
10H
11H
8ZH
1
2
3
4
5
6
7
8
9
1Z
2
3
5
6
7
9
5Z
1H
1
2
3
4
5
6
3Z
3
4
7
7H
1
2
3
4
5H
7H
6H
P1H
P
1
2
3
4
5
6
5Z
1
2
3
4
5
6
9H
1
Z
1
3
4
5
6
1Z
1
2
5
2Z
1
2
3
4
5
6
1
2
3
4
5
6
7
8
9
8ZH
2ZH
12H
9H
L1
L2
L1
L2
BH-12
BH-35
BH-5
BH-52
-55
BH-D
ED
EE
IE
II
IJ
IK
IL
IM
IN
IT
IW
S1-4
S1-6
SG
SH
SU
SV
SW
SY
748000 749000 750000 751000 752000 753000 754000 755000 756000 757000 758000 759000 760000 761000 762000 763000 764000
748000 749000 750000 751000 752000 753000 754000 755000 756000 757000 758000 759000 760000 761000 762000 763000 764000
2126000
2128000
2130000
2132000
2134000
2136000
2138000
2126000
2128000
2130000
2132000
2134000
2136000
2138000
0 500 1000150020002500m
1:70000
MHS : B Top Structure Contour Map
Studies for field redevelopment

20. 20
Scheme Forecast, MMt % RF by 2030
Base 134.9 25.0
MH North
Phase-I
Scheme 158.2 29.2
Base 286.7 29.3
MH South
Phase-I
Scheme 320.6 32.8
Base 156.9 29.0
MHN A1
Layer
Scheme 160.4 29.7
IOR Schemes Western Offshore Fields

21. 21
IOR Schemes Western Offshore Fields
Scheme Forecast, MMt % RF by 2030
Base 158.4 29.3
MH North
Phase-II
Base 318.4 32.5
Scheme
RCE
337.6
Scheme 178.2 32.2
34.5
MH South
Phase-II
Base 25.0 20.2
Heera
Redevelopment
Scheme 35.7 28.9

22. 22
Reserves Improvement: Mumbai High
0.001
0.010
0.100
1.000
10.000
0 25 50 75 100 125 150
W
O
R
Cum.Oil, MMt
Water Oil Ratio Vs. Cum Production
Start of Redevelopment Phase-I
MHN:Oil rate vs Oil production
0
20000
40000
60000
80000
100000
120000
140000
0 25 50 75 100 125 150 175 200
Np, MMt
BOPD
Start of Redevelopment Phase-I
0.001
0.010
0.100
1.000
10.000
0 50 100 150 200 250 300
Cum.Oil, MMt
W
O
R
Water Oil Ratio Vs. CumProduction
Start of Redevelopment phase
MHS: oil Rate Vs cummulative production
0
50000
100000
150000
200000
250000
300000
350000
400000
0 50 100 150 200 250 300 350 400
Np, MMt
B
O
PD

23. 23
0
50000
100000
150000
200000
250000
300000
350000
400000
450000
500000
Mar-76
Mar-79
Mar-82
Mar-85
Mar-88
Mar-91
Mar-94
Mar-97
Mar-00
Mar-03
Mar-06
Mar-09
Mar-12
Mar-15
Mar-18
Mar-21
Mar-24
Mar-27
Mar-30
Initial
Development
WI, ADBHN & AORP
EORP in
South & L-II Re-dev Ph-I
Re-dev Ph-II
Production Enhancement - Mumbai High
MH North
Phase-I
(RFR) Phase-II MH South
Phase-I
(RFR)
Phase-II
(RCE)
Capex, Rs Cr 3239.43 7133.39 Capex, Rs Cr 6579.25 8813.41
Incr Oil, MMt 23.25 17.35 Incr Oil, MMt 33.85 18.31
Incre.Oil 57.10 MMt
Incre.Oil 35.66 MMt

24. 24
0
100000
200000
300000
400000
500000
600000
700000
800000
900000
Mar-76
Mar-78
Mar-80
Mar-82
Mar-84
Mar-86
Mar-88
Mar-90
Mar-92
Mar-94
Mar-96
Mar-98
Mar-00
Mar-02
Mar-04
Mar-06
Mar-08
Mar-10
BOPD,
BLPD
0
50
100
150
200
250
300
350
400
450
Cum
Oil
(MMt)
BLPD BOPD Cum Oil (MMt)
Production Performance – MH field

25. 25
Production Performance – Heera field
0
20000
40000
60000
80000
100000
120000
140000
Mar-84
Mar-85
Mar-86
Mar-87
Mar-88
Mar-89
Mar-90
Mar-91
Mar-92
Mar-93
Mar-94
Mar-95
Mar-96
Mar-97
Mar-98
Mar-99
Mar-00
Mar-01
Mar-02
Mar-03
Mar-04
Mar-05
Mar-06
Mar-07
Mar-08
Mar-09
Mar-10
BOPD,
BLPD
0
10
20
30
40
50
60
70
80
90
100
Cum
Oil
(MMt)
BLPD BOPD Cum Oil (MMt)

26. 26
Production Performance – Neelam field
0
20000
40000
60000
80000
100000
120000
140000
160000
180000
200000
Mar-90
Mar-91
Mar-92
Mar-93
Mar-94
Mar-95
Mar-96
Mar-97
Mar-98
Mar-99
Mar-00
Mar-01
Mar-02
Mar-03
Mar-04
Mar-05
Mar-06
Mar-07
Mar-08
Mar-09
Mar-10
BOPD,
BLPD
0
5
10
15
20
25
30
35
40
45
50
Cum
Oil
(MMt)
BLPD BOPD Cum Oil (MMt)

27. 27
Technologies Inducted
y Hi-tech wells -Horizontal, Multilateral, ERD
y Rotary steerable system (RSS) to increase
drilling efficiency
y Glycol & Synthetic Oil Base (SOBM) mud for
efficient drilling
y HGS for drilling/ workover of depleted zones
y Enzyme breaker for horizontal drain hole
clean up
y Perforated liner completion for stability of
horizontal drainholes
y CTU friendly completion
y Segmented, Level-3 well completion
Continued…

28. 28
Technologies Inducted
y Relocation of poor producers through variety of sidetracks
y CHFR
y Modular rigs
y Logging while drilling (LWD)
y Real time operation (RTO) monitoring
y Geo-steering in thin zones
y ‘Smart’ well platforms
Continued…

29. 29
y Improved Reservoir Model
◦ 3D-4C API
◦ Fracture delineation & extent mapping for tracking of
Reservoir fluid movement and placement of wells
optimally
y Improved well completion for prolonged oil productivity
y Electrical submersible pumps for efficient liquid lifting
y Integrated asset management (IAM) for real time
surveillance and control, OCC
y Platform mounted modular rigs
y EOR
Improved Technology Induction planned

30. 30
Summary
y Absorption of technological advancements in G & G,
engineering, drilling and completion of hi-tech wells has
boosted the production and improved recovery.
y Life cycle approach has helped to continue production and
recovery improvement from the matured offshore fields.
y With integration of the experience gained and leveraging
state-of-the art technology, it is envisioned that it will be
possible to improve performance and further enhance the
oil recovery.

31. 31
Thanks for Kind Attention