GSA Pittsburgh 2011 · 2011-03-29 · The Shenhua Group, China's biggest coal producer, is...

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?

w.guochang@gmail.com

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