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7/17/2019 Gamij_Stage gate 15.05.14.pdf
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Developm ent o f Marginal and Satel li te f ields
Transfo rmation of Marginal
Field through use of techno logy
IDEC-2014
23th May 2014
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Gamij Stage Gate
Ahmedabad Asset
2 /37
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Gamij Stage Gate
Sub Surface Resources
First Well Kalol#1 (18th Apr 1961)
Area 6200 sq. km.
Field / ML 25 / 59
PD OIIP 494.6 MMt
Ultimate 85.9 MMT
RF 17 %
Np* 52.6 MMT (10.6%)
Reserves 33.3 MMT
R/P 24
As on 01.04.14
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Gamij Stage Gate
Operational Areas
AREA-I AREA-II AREA-III AREA-IV
Kalol Ahmedabad South Kadi Limbodra
Motera Nawagam Jhalora Gamij
Wadu Nandej Sanand Halisa
Paliyad Wasna Wamaj Walod
VG Sadra Wadsar L.East
Mahilaj Viraj
Asmali Karannagar
Vatrak
Hirapur
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Gamij Stage Gate
Category Field Name No. of
FieldsMajor fields
OIIP >30 MMt
Kalol, Nawagam, Gamij 3
Medium Fields
10<OIIP<30MMt
Jhalora, Limbodra, Sanand, Ahmedabad,
Wasna, Sadra, Nandej, South Kadi, Wadu-
Paliyad, Halisa
10
Small fields
OIIP<10 MMt
Viraj, Wadsar, Mahelaj, Motera, Asmali,
Limbodra East, Wamaj, South Viraj,
Vatrak, Walod, Ognaj, Hirapur
12
Total Fields 25
Fields – Ahmedabad Asset
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Gamij Stage Gate
Category Wells Oil Gainm3
Development wells 51 52967
Zone transfer 18 13586
Total 66553
Development Activities : 2013-14
Development
Wells
Potential
Planned,tpd
Potential
Generated,tpd
Current
Rate,tpd
Potential
Yet to
monetized,tpd
51 229 472 251 69
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Development Drilling at a glance: 2013-14
13
135
262302
347
436 427
556
739
565
792
586
742
991
713
0
200
400
600
800
1000
1200
P r o d u c t i o
n , T
P D
Cumm. Gain, TPD 2011-12 2012-13 2013-14
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2013-14
No. of Wells 52
Repeat Job 09
Total Jobs 61
Hydro-fracturing Performance
• Oil Gain ( as on 01.04.14) : 26465 M3
• 15 jobs could not be executed as per plan
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Gamij Stage Gate
GamijTransform at ion from Margin al to Big Field
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Gamij Stage Gate
Gamij
OGNAJ
WADSAR
INDEX MAP OF AHMEDABAD ASSET FIELDS
Gamij
Discovered in 1982 with
drilling of well Gamij-1
Located on eastern margin ofAhmedabad-Mehsana
tectonic block of Cambaybasin
Linear field geometry
- 30 km long
- 5 to 10 km wide
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Gamij Stage Gate
A multilayered, heterogeneous
reservoir on depletion drive.
Main oil producing sands- Kalol,
Chhatral and Olpad.
Kalol sands are developed
throughout the field as thin tomedium sandstone layers.
Chhatral sands are developed as
thin sandstone/siltstone layeres
within Cambay shale
1
2
3
45
6
7
8
9
10
11
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16
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19
20
21
22
23
24
25
26
27
28
29
30
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36
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39
40
4142
43
44
45
4647
48
49
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51
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5556
57
5859
60
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63 64
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9595A
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118
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2618200 2618400 2618600 2618800 2619000 2619200 2619400 2619600 2619800 2620000 2620200 2620400 2620600 2620800 2621000 2621200 2621400 2621600 2621800 2622000 2622200 2622400 2622600 2622800 2623000 2623200 2623400 2623600 2623800 2624000 2624200 2624400 2624600 2624800 2625000 2625200 2625400 2625600 2625800 2626000 2626200 2626400 2626600 2626800 2627000 2627200 2627400 2627600 2627800 2628000 2628200 2628400 2628600 2628800 2629000 2629200 2629400 2629600 2629800 2630000 2630200 2630400 2630600 2630800 2631000 2631200 2631400 2631600 2631800 2632000 2632200 2632400 2632600 2632800 2633000 2633200 2633400 2633600 2633800 2634000 2634200 2634400 2634600 2634800 2635000 2635200 2635400 2635600 2635800 2636000 2636200 2636400 2636600 2636800 2637000 2637200 2637400 2637600
2618200 2618400 2618600 2618800 2619000 2619200 2619400 2619600 2619800 2620000 2620200 2620400 2620600 2620800 2621000 2621200 2621400 2621600 2621800 2622000 2622200 2622400 2622600 2622800 2623000 2623200 2623400 2623600 2623800 2624000 2624200 2624400 2624600 2624800 2625000 2625200 2625400 2625600 2625800 2626000 2626200 2626400 2626600 2626800 2627000 2627200 2627400 2627600 2627800 2628000 2628200 2628400 2628600 2628800 2629000 2629200 2629400 2629600 2629800 2630000 2630200 2630400 2630600 2630800 2631000 2631200 2631400 2631600 2631800 2632000 2632200 2632400 2632600 2632800 2633000 2633200 2633400 2633600 2633800 2634000 2634200 2634400 2634600 2634800 2635000 2635200 2635400 2635600 2635800 2636000 2636200 2636400 2636600 2636800 2637000 2637200 2637400 2637600
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0100200300400500m
1:10000
LOCATION MAP OF GAMIJ
NORTHERN
SECTOR
SOUTHERN
SECTOR
CENTRAL
SECTOR
GAMIJ FIELD
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Gamij Stage Gate
Cross Section from West to East
(Northern Part)
• Strati-structural Trap
• Dip(8-10 degree)
• No OWC seen
W E
Geological Features
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Gamij Stage Gate
DEVELOPMENT HISTORY
1982 - First well Gamij-1 drilled
1994 - Commercial production started
2000 - Development plan by Ahmedabad Asset
2002 - Development plan for Kalol-V, VI and VII by IRS
2008 - Six Development locations were released for Chhatral sand in 6th ADB
(by Asset)
2010 - Eleven development locations were released for K-V, VI +VII, VIII andChhatral sand (Central+South Gamij) in 8th ADB (by Asset)
2011 - Ten development locations were released for K- VII sand
(South Gamij) in 9th ADB (by Asset)
2012 - Five development locations were released for K-VI+VII
sand (Central Gamij) in 10th ADB (by Asset)2013 - Ten development locations were released for K-VI & Chhatral sand
(North & South Gamij) in 11th ADB (by Asset).
2014 - 77 locations were proposed in 13th ADB and 37 locations were
recommended
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Gamij Stage Gate
Wells Drilled and Flowing wells
1 0 0 0 02
02 1 0
4
0
42 1
52 1
7
10 119
25
24
10 97
19
47
0 0 0 0 0 0 0 0 0 0 0 0
7
10 11 12
1618
22
31
4144 44
48 48
5255
65
75
90 91
92
0
10
20
30
40
50
60
70
80
90
100
1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012
No. of new wells drilled No. of wells on production
2013
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Gamij Stage Gate
Year
(as on 1st April)
OIIP (PD)
MMt
Ult. Reserves
MMt
2004 15.47 1.61
2005 16.15 1.66
2006 16.15 1.68
2007 16.18 1.69
2008 19.00 1.96
2009 20.48 2.01
2010 31.40 2.53
2011 33.01 2.792012 34.59 2.89
2013 35.87 3.29
2014 51.39 3.29
Reserve Growth
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Gamij Stage Gate
Gamij
STATUS OF FIELD
OIIP 51.39 MMt
Ult. Reserves 3.29 MMt
Recovery (%) 2.4
Cum production 1.24 MMt
Reserves 2.06 MMt
Wells drilled 138
Oil wells 103
Oil production rate 340 tpd
Pay Zones Kalol , Chhatral
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Gamij Stage Gate
Hydrofracturing Inputs
Year No. of Wells
2010-11 07
2011-12 15
2012-13 16
2013-14 03
2014-15 (till date) 01
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Gamij Stage Gate
PAY ZONE OIIP (PD)
MMt
ULT RES (PD)
MMt
RF
%
CUM PRDN
(MMt)
Rec(%) RESERVES
(PD) MMt
OIIP UL
YCS 0.74 0.05 7 0.005 0.68 10 0.05
OOLITE 1.6 0.02 1 0.02 1.25 100 0.00
K-III+IV+V+VI+VII 10.5 1.96 19 1.02 9.71 52.04 0.94
K-VIII 0.96 0.09 9 0.04 4.17 44.44 0.05
K-IX+X 2.53 0.17 7 0.02 0.79 11.76 0.15
CHHATRAL 34.35 0.95 3 0.1 0.29 10.53 0.85
OLPAD 0.71 0.05 7 0.03 4.23 60.00 0.02
TOTAL 51.39 3.29 6.4 1.24 2.41 37.69 2.05
EXPLOITATION STATUS OF GAMIJ
AS ON 01.04.2014
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Gamij Stage Gate
Performance
1994 95 96 97 98 99 2000 01 02 03 04 05 06 07 08 09 10 11 12 13 14
0
150
300
450
600
0
20
40
60
80
100
N O O F
O P
Q o
( m 3 / d )
Q l i q ( m 3 / d )
1994 95 96 97 98 99 2000 01 02 03 04 05 06 07 08 09 10 11 12 13 14
0
20
40
60
80
100
W C %
0
150
300
450
600
Q w i n j ( m 3 / d )
1994 95 96 97 98 99 2000 01 02 03 04 05 06 07 08 09 10 11 12 13 14
0
300000
600000
900000
1200000
1500000
0.0
2.5
5.0
7.5
10.0
12.5
N O O F W I N J
C U M O I L ( m 3
)
C U M W I ( m 3
)
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Gamij Stage Gate
Surface Infrastructure
Commissioned in 2006
Commissioned in 2011
Commissioned in 2013
• Divided in to 3 sectors.
• Historically on tank production
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Gamij Stage Gate
• OIIP increased from 15MMt to 51MMt
• Oil production increased from 200 to 360tpd during last 3 years and
efforts to enhance it to 1000tpd
• Air injection pilot is to be implemented in Gamij Central and
envisaged recovery of 47%• Carried out fast track development drilling, HF jobs and well
interventions
• Strategies formulated for full fledged water / gas injection
• Surface facilities created by construction of EPS-III & EPS-II
Need of Stage Gate Process
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Gamij Stage Gate
Stage Gate Process
1
3
4
5
6
7
8
CR
FDP
Commencement
Steady state
Discovery
Commerciality
RFSU
Reserves
Execute
Define
(detail FR)
SelectConcept
Reserve
Appraisal
Explore to
Discover
Commission
& Start-up
Steady state
Operations
Commerciality
Assessment
Stage
2
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Gamij Stage Gate
S.N. Activity Action by Schedule
1 Formation of MDT for stage gate for Gamij Nov-12
2 Interaction with IOGPT on scope of work Asset MDT Dec-12
3 Fault pattern, Seismic Surfaces WOB Jan-13
4 RMS amplitude data for all horizons WOB Jan-13
5 Well Correlation FB & WOB Jan-13
6 Surface maps incorporating fault patterns WOB & IRS Feb-13
7 Log processing CEWELL Feb-13
8 QC of logs processing and data loading for PETREL model IRS & ASSET Feb-13
9 Geocellular Model IRS May-13
10 Final Peer Review of Geocellular Model IRS , WOB & Asset May-13
11 Gamij Reservoir model IRS Aug-13/Sep-13
12 Preliminary Profile IRS Sep-13
13 Reservoir Simulation IRS Dec-13
14 Interaction with Onshore Engg. on design Job for new facility Asset
15
Simulation of existing facilities and pipeline network , flow assurance
and other
IOGPT Aug-14
16 Facility Planning based on profile IOGPT Aug-14
17 Preparation & Compilation of FDP MDT Sep-14
Activity Schedule
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Gamij Stage Gate
Status
Geocellular model completed in 2013
Accretion 11.8 MMt OIIP in Chhatral
Net accretion of 11.2 MMt in Gamij
6.9 MMt up gradation in OIIP
Reservoir simulation completed for Kalol & Chhatral pays Objective of the study
Infill drilling for optimum exploitation for Kalol sands
Review of water injection for pressure maintenance for Kalol sands
by infill drilling and conversion of poor oil producers to water
injectors Development strategy for Chhatral sand including assessing the
requirement of water injection scheme
IRS proposed 77 location out of which 37 location were recommended
in 13th ADB, Mar’14
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Gamij Stage Gate
Chhatral Pay- Development Strategy
Chahatral OIIP – 35 MMt
Chhatral sand developed throughout of the field
Sand thickness is vary from 20m to 200m
Permeability in the range of less than 1 md to 10 md
Sand is on depletion drive
Well productivity only 2-3 m3/d
Cumulative oil production 0.113 MMm3 (as on 1.1.2014)
Recovery is around 0.33%
Sensitivity of well spacing and different water injection pattern
done
Development strategy needs cautious approach
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Gamij Stage Gate
• Strategy-I : Sensitivity With Vertical OP and WI
• Strategy-II : Sensitivity with Horizontal OP and WI
Chhatral Pay- Development Strategy
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Gamij Stage Gate
• Sensitivity of well Spacing (200 m, 300 m & 400 m) in
Depletion
Peripheral Water Injection
Line Drive
Inverted 5 Spot
Chhatral Pay- Development Strategy
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Gamij Stage Gate
Exploitation Strategy Well Spacing Recovery in ~ 20
years
IRR, %
Depletion
200 m 2.03 -45.36
300 m 2.15 -8.5
400 m 2.27 13.08
Peripheral WI
200 m 4.73 -4.58
300 m 5.74 9.94
400 m 4.25 11.7
Line Drive WI 200 m 11.92 9.98
300 m 8.72 14.9
Inverted 5 Spot Pattern WI spacing
(producer to producer)
200 m 14.93 10.78
300 m 13.48 28.63
400 m 11.61 36.98
Chhatral Pay- Development Strategy
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Gamij Stage Gate
400 m
300 m
200 m
Chhatral Pay- Development Strategy
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Gamij Stage Gate
Target Oil : 4.53 MMm3
Sector modeling : Formulation of Dev Strategy
• Sensitivity analysis with respect to well spacing and water injection strategy
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Gamij Stage Gate
Innovative HF in Chhatral Pay : GM-130
GM-130 , 808-821m, 40T
GM-130 , 826-835m, 40 T
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Strategy:2 Horizontal producer and Horizontal
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Gamij Stage Gate
Two sets of Producer and water injector with multi stage fracturing was
also modeled to see its productivity
Strategy:2 Horizontal producer and Horizontal
Injector
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Gamij Stage Gate
Drilling & Fracturing of Horizontal Wells
Chhatral Pay- Development Strategy
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Gamij Stage Gate
S.No. Project
Schedule
From To
1 Review of stimulation techniques of Gamij Field (HF
Analysis)
April’13 Oct’13
2 Review of water injection system of Gamij Field May’13 Nov’13
3 Adequacy of Oil & Gas Facilities in Gamij Field May’13 Dec’13
4 Adequacy of existing well fluid flowline of Gamij
Field Network
April’13 Nov’13
5 Review of A/Lift mode in wells of Gamij Field Aug’13 Jan’14
6 Process Scheme of Effluent Treatment & Injection May’13 Oct’13
7 Crude evaluation of Gamij Crude May’13 Sep’13 8 Conceptual plan for Gamij Redevelopment (Stage
Gate Process) for inputs to FDP (Field Development
Plan)
Sep’13 Mar’14
Facilities Planning
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Gamij Stage Gate
Way Forward
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Gamij Stage Gate
Performance - Anticipated
0
200
400
600
800
1000
1200
Apr-08 Apr-10 Apr-12 Apr-14 Apr-16 Apr-18
Q o ( t p d )
1000 tpd
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Gamij Stage Gate
Thank You
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Gamij Decline
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y = -13.836x + 224.8
0
50
100
150
200
250
0 0.5 1 1.5 2 2.5 3 3.5
R a t e ,
T P D
Years
Gamij Decline
Decline (last 03 yrs) = 6 %
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