gsa pittsburgh 2011 · 2011-03-29 · the shenhua group, china's biggest coal producer, is...
TRANSCRIPT
2011 GSA Northeastern/North-Central Joint Section Meeting
WANG, Guochang and CARR, Timothy R.
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� Motivations
� The Ordos Basin Geologic Background
� 3D Geologic Modeling
� Potential Reservoirs-Caprock Assemblages� Potential Reservoirs-Caprock Assemblages
� CGS Capability and CO2
Leakage Risk
� Conclusions
� Acknowledgements
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The Shenhua Group, China's biggest coal producer, is
planning to launch the CCS project for its modern DCL
plant which produces CO2
3.67Mt/yr.
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Shenhua DCL Plant in Inner Mongolia, China
� In the future, more CO2
emission in the Ordos Basin due to Coal-To-Liquid
development in the Ordos Basin
� In 2004, about 100Mt CO2
emission in the Ordos Basin
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� In North China Block
� Area: 370,000 km2 (140,000mi2), as big
as half Texas
� Thickness: 2,000~10,000m
� Proven oil reserves: 10*108metric tons
� Proven gas reserves: 1.54*1012m3
� Abundant of coal mining
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� Abundant of coal mining
� Six tectonic units
� A huge monocline in Tianhuan
Depression and Shaanbei Slop
� Most of the faults in Western
Margin Thrust-Fault Belt and Jinxi
Belt
� Dip angle less than 1o
� Deeping to west
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Xifeng Qingyang NanxianZhentan1# Futan1# Yitan1#Lian1#
K
JT3
T1+2
C+P O
€
Pt2+3Pt1+At
0km
-2
-4
-6
Western Margin
Thrust-Fault Belt
Tianhuan Depression Shaanbei Slope Jianxi Fold Belt
0 50 100km
East
� Deeping to west
Modified from Deng, 2008
Carboniferous Top
Structure Map with
Major Faults
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Mesozoic
Oil System
Ordos Basin
Hydrodynamic Systems
Sandstone--Shale
Lithology of
Reservoir--Caprock
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Lower Paleozoic
Gas System
Upper Paleozoic
Gas SystemSandstone/Coal--Shale
Carbonate--Evaporate/Bauxite
Ground
Surface
Shenhua
DCL Plant
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Shenhua
DCL Plant
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Ordovician Top
Geothermal Gradient and Pressure Gradient ~850m
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Reservoir-Caprock Assemblages
Height of rectangle
does NOT mean
thickness
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Caprock: Shale, Evaporate or Coal
Reservoir: Sandstone or Coal
Reservoir: Limestone or Dolomite
� Widely Distributed Reservoirs
� Thick Sandstone and Carbonate
� Low Porosity
� Low Permeability
� High Heterogeneity
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� Potential Reservoirs in Ordovician
� Karst Reservoir
� Dolomite in Tianhuan Depression
� Sandstone in Western Margin
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Shiqianfeng Sandstone Isopach in Permian He8 Sandstone Isopach in PermianUnit in Meter
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Shan1 Sandstone Isopach in Permian Shan2 Sandstone Isopach in PermianUnit in Meter
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Net coal isopach for the Benxi and Taiyuan Group of Carboniferous
Net coal isopach for the Shanxi Group of Permian Unit in Meter
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Net coal isopach for the Yan’an Group of Triassic
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Shale isopach of Shangshihezi Group of
Permian
Net shale isopach of Shiqianfeng Group
of PermianUnit in Meter
Oil Fields CCS CapacityOil Fields CCS CapacityOil Fields CCS CapacityOil Fields CCS Capacity
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Gas Fields CCS CapacityGas Fields CCS CapacityGas Fields CCS CapacityGas Fields CCS Capacity
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MethodsMethodsMethodsMethods
Saline AquifersSaline AquifersSaline AquifersSaline Aquifers�Shiqianfeng: 22.3Gt
�He8: 5.2Gt
� Shan1: 3.7Gt
� Ma4: 3.1Gt E=1%; CO2 Density=650kg/m3E=1%; CO2 Density=650kg/m3E=1%; CO2 Density=650kg/m3E=1%; CO2 Density=650kg/m3
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� Ma4: 3.1Gt
�Shan2: 2.0Gt
Coal BedsCoal BedsCoal BedsCoal BedsTotally 660Mt CO
2with producing CBM
� Geologic factors
� Caprock sealing ability
� Lithology
� Thickness
� Distribution
� Faults
� Open or sealed
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1: Cretaceous; 2: Jurassic; 3: Triassic; 4: Paleozoic;
5:Proterozoic/Archaeozoic; 6: Cenozoic; 7: Permian
Outcrop; 8: Shiqianfeng Outcrop
� Open or sealed
� Engineering factors
� Abundant of Oil and Gas Industry Drilling
� Over 1,000 wells through Ordovician
� Over 10,000 wells through Triassic
� Wells with casing corrosion
� 10% due to CO2
and H2S
� Multiple potential reservoir-caprock assemblages
� Huge CGS capacity in saline aquifers
� Large CGS capacity in gas fields, but not available now for
CGS
� Oil fields are possible to launch CO2-EOR, but not good for
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� Oil fields are possible to launch CO2-EOR, but not good for
CGS
� Low porosity and permeability, low injection rate unless
stimulation or horizontal well
� Casing corrosion wells as CO2 leaking pathway
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Thanks!
Any question?
Thanks!
Any question?Any question?
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