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GIS Methods for Reservoir Assessment and Estimating CO 2 Sequestration Capacities

This research paper explores the use of GIS methods for assessing reservoirs and estimating CO2 sequestration capacities. The study focuses on shale sequestration and regional partnerships, presenting data on the sequestration potential and conversion factors. It also discusses the basic method for shale storage calculations and provides steps for data interpolation and analysis using ArcGIS software.

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GIS Methods for Reservoir Assessment and Estimating CO 2 Sequestration Capacities

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  1. GIS Methods for Reservoir Assessment and Estimating CO2 Sequestration Capacities Brandon C. Nuttall GSA, Denver, Colorado 10-Nov-2004

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

  3. Sequestration Potential 33 billion metric tonnes 371 years of Kentucky emissions

  4. * At 60°F and 1 atm Conversion Factors • 1 m3 = 35.31 ft3 • 1 ton CO2 = 17.25 Mcf * • 1 ton = 0.907185 metric tonnes

  5. Basic Method for Shale • Find: Storage = Shaletons * CO2/ton • Using • Spatial Analyst • ArcView 3.2 • ArcGis 8.3 • Depth >= 1,000 feet • Thickness >= 100 feet

  6. Math for Grid Calculations MMtonsshale @ 2.6 g/cc = 0.873 * thickness CO2 @ 40 scfCO2/ton = 57.97 * 0.873 * 40 * thickness = 2024.3 * thickness

  7. 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

  8. Start with Basic Data

  9. Interpolate Grids: Structure • Also • Isopach • Depth to top Deepest in red

  10. Map Query: Depth>=1,000 1 = Yes 0 = No

  11. Shale in the Subsurface Derived from geologic map

  12. Deep and Thick Shale Map Query: Subsurface AND Depth AND Thick

  13. Storage by Kilometer2 Map Calculate: DeepThick * Isopach * 2,024.3

  14. Summarize by County ArcGIS 8.3 (ArcMap)

  15. >3 MM Tonnes/sq km <1MM Devonian Black Shale 25.1 billion tonnes 1.2 m3/tonne (40 scf/ton) thickness weighted average

  16. Mt. Simon Saline Reservoir Sparse control data Exceeds 12,000 ft below sea level

  17. Procedure • Fluid volume • Ø, Sw, area, thickness • CO2 solubility • Temperature • Pressure • Salinity Can model using depth

  18. Digital Elevation Model • Elevation • Structure • + Thickness/2 • Midpoint depth seamless.usgs.gov, SRTM 90m

  19. Average 10% Range 8-12% 12% @ 1,000’ 10% @ 5,000’ 8% @ 10,000’ Suggested by: www.aapg.org/education/dist_lect/slides/2001_02/bloch2.pdf and others Porosity-Depth Model

  20. Other Models • Pressure = 0.433 * depth • Temp = 58 + depth/100 • Salinity = 25.4 * depth + 15878 • MIDCARB solubility calculator

  21. Storage Capacity Summarize by state Highest capacity in red

  22. Conclusion Spatial analysis tools provided by GIS software can be used to manipulate gridded data in regional sequestration assessments.

  23. www.uky.edu/KGS

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