Date post: | 20-Jun-2015 |
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Spotlight
Akhil Prabhakar (Int. Mtech 4th yr GPT)Swapnil Pal (Int. Mtech 4th yr GT)Ojaswita Singh (Mtech 1st yr GPT)
IIT Roorkee
Base map
A B
C
D
0
200
400
600
800
1000
1200
1400
1600
Cross-section across A-B
Dep
th (m
)
A B
S N
0
500
1000
1500
2000
2500
Cross-section across C-D
C
D
SE NW
0 20 40 60 80 100 120 140 160 180 2000
500
1000
1500
2000
2500
Cross-section across C-D
Distance
Depth
SE NW
Traps
Anticlinal trap Fault trap
Following conclusions can be drawn from the base map:
Primary structural element: antiformal fold and fault
Trap: anticlinal trap
Area of Hydrocarbon accumulation: 53.15 Km2
Well log templates (GR)Well 1 Well 2 Well 3
Well no. Top reservoir
Base reservoir
mTVD mTVD
Well 1 765 859
Well 2 909 960
Well 3 878 956
Marker Data
Well log templates (GR)Well 1
Average gross reservoir thickness = 94m Net-sand thickness = 27.5mNet to gross (NTG) = 0.293Average porosity = 27%Average water saturation = 0.1
Well log templates (GR)Well 2
Average gross reservoir thickness = 51m Net-sand thickness = 21mNet to gross (NTG) = 0.411Average porosity = 27.17%Average water saturation = 0.08
Well log templates (GR)Well 3
Average gross reservoir thickness = 78m Net-sand thickness = 19mNet to gross (NTG) = 0.244Average porosity = 25.7%Average water saturation = 0.09
Comparison of different wells
Well 1 Well 2 Well 3 Field
Average gross reservoir thickness
94m 51m 78m 74.3m
Net sand thickness 27.5m 21m 19m 22.5m
Net to Gross 0.293 0.411 0.244 0.316
Average porosity 27% 27.17% 25.7% 26.6
Average water saturation 0.1 0.08 0.09 0.09
Depositional environment
Fluvial/detaic environment.• Alternating sand and shale.• Clastic sediments deposition in passive margin. Recovery factor: Primary 40% EOR 50-60%
Formation Pressure Data (Well 2)
Depth (mTVD) Formation pressure (psi)
946 1614
952 1619
956 1622
969.5 1639
977 1650
980.5 1655
Formation Pressure Data (Well 2)
Formation pressure
944 946 948 950 952 954 956 958 960 962 964 966 968 970 972 974 976 978 9801590
1600
1610
1620
1630
1640
1650
1660
Fluid contact depth
formation pressure
Depth (mTVDSS)
For
mat
ion
pres
sure
(ps
i)
Slope = 0.45 psi/feet
Slope = 0.25 psi/feetSlope = 0.22 psi/feet
Slope = 0.38 psi/feet
Slope = 0.44 psi/feet
Oil filled reservoir
Water filled reservoir
Oil-water contact
Calculations:
Total in-place hydrocarbon = 516.3319986 million hydrocarbon volumes
Recoverable reserves = 206.5327994 million hydrocarbon volumes
Volume produced per day by a well = 5000 hydrocarbon volumes
Production at this rate from 1 well for 15 yrs. = 27.375 million hydrocarbon volumes
Number of wells needed = 18 or 19 wells
Thank you