GIS Methods for Reservoir Assessment and Estimating CO2 Sequestration Capacities

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GIS Methods for Reservoir Assessment and
Estimating CO2 Sequestration Capacities

• Brandon C. Nuttall
• GSA, Denver, Colorado
• 10-Nov-2004

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Acknowledgments

• MIDCARB project (NETL/DOE)
• Continuing research
• Shale sequestration
• NATCARB
• Regional Sequestration Partnerships

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Sequestration Potential
33 billion metric tonnes 371 years of Kentucky
emissions
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Conversion Factors

• 1 m3 35.31 ft3
• 1 ton CO2 17.25 Mcf
• 1 ton 0.907185 metric tonnes

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Basic Method for Shale

• Find Storage Shaletons CO2/ton
• Using
• Spatial Analyst
• ArcView 3.2
• ArcGis 8.3
• Depth gt 1,000 feet
• Thickness gt 100 feet

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Calculated Langmuir Volumes
CO2 adsorbed (SCF/ton)
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Math for Grid Calculations
MMtonsshale _at_ 2.6 g/cc 0.873 thickness
CO2 _at_ 40 scfCO2/ton 57.97 0.873 40
thickness
2024.3 thickness
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Math for Grid Calculations

• Storage capacity per grid cell
• Density (2.6 g/cc)
• Adsorption (40 scf/ton)
• Area (1 km2)
• Thickness (variable)

2,024.3 thickness
In tons, not tonnes
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Start with Basic Data
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Interpolate Grids Structure

• Also
• Isopach
• Depth to top

Deepest in red
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Interpolate Grid Isopach
Thickest in red
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Map Query Depthgt1,000
1 Yes
0 No
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Shale in the Subsurface
Derived from geologic map
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Deep and Thick Shale
Map Query Subsurface AND Depth AND Thick
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Storage by Kilometer2
Map Calculate DeepThick Isopach 2,024.3
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Summarize by County
ArcGIS 8.3 (ArcMap)
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Devonian Black Shale
25.1 billion tonnes
1.2 m3/tonne (40 scf/ton) thickness weighted
average
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Mt. Simon Saline Reservoir
Sparse control data
Exceeds 12,000 ft below sea level
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Procedure

• Fluid volume
• Ø, Sw, area, thickness
• CO2 solubility
• Temperature
• Pressure
• Salinity

Can model using depth
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Digital Elevation Model

• Elevation
• Structure
• Thickness/2
• Midpoint depth

seamless.usgs.gov, SRTM 90m
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Porosity-Depth Model

• Average 10
• Range 8-12

• 12 _at_ 1,000
• 10 _at_ 5,000
• 8 _at_ 10,000

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Other Models

• Pressure 0.433 depth
• Temp 58 depth/100
• Salinity 25.4 depth 15878
• MIDCARB solubility calculator

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Storage Capacity
Summarize by state
Highest capacity in red
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Conclusion
Spatial analysis tools provided by GIS software
can be used to manipulate gridded data in
regional sequestration assessments.
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www.uky.edu/KGS