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Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green Rive

Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green River Basin. Patrick Fortson Hunt, Wallace and Associates LLC December 2, 2004. Purpose. Produce map of Table Rock field displaying location relative to political boundaries

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Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green Rive

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  1. Formation Water Property Interpolation and Mapping from Wireline Logs for the Table Rock Field in the Greater Green River Basin Patrick Fortson Hunt, Wallace and Associates LLC December 2, 2004

  2. Purpose • Produce map of Table Rock field displaying location relative to political boundaries • Combine township/range map with field map • Interpolate formation properties between wells for areas where no data is available

  3. Overall Goal • Determine if water saturated formations can be used as water injection zones for disposal of produced water

  4. Southwestern Wyoming • Wastelandish and proud of it

  5. Still beautiful despite its emptiness

  6. People are strange, when you’re a stranger

  7. Meteorites abound

  8. Data Sources • Wyoming Oil and Gas Conservation Commission • Wyoming Geographical Information Sciences Center

  9. Southwestern Wyoming Biggest city is Rock Springs – Pop. 23016

  10. Well Files from WOGCC Data Available: • Production History • Well Logs • Formation Tops • Gas/Water Analysis • Perforation Intervals

  11. Well Records

  12. Lack of Data • Virtually no water analysis data

  13. Table Rock Field

  14. Table Rock Formations • Wasatch • Fort Union • Lance • Fox Hills • Lewis • Almond Water Present

  15. Wireline Logs • Gamma Ray, SP, and Resistivity Log for Fox Hills Water Sand • Other logs give density and neutron porosity, sonic Deep Resistivity SP Deflection

  16. Static Spontaneous Potential for Determining Water Resistivity and Salinity • Rmf to Rmfeq using formation temperature

  17. SSP-Rweq Nomograph • SP deflection to Rmfeq/Rweq ratio using formation temperature • Ratio with Rmfeq to get Rweq

  18. Rweq to Rw

  19. Rw to formation temperature • Follow curve to NaCl concentration in ppm

  20. Problems with Salinity • Special software needed for viewing large raster images of logs • Only four wells have enough viewable data to determine salinity • Not enough points for good analysis • Geostatistical Analyst will not run with fewer than 10 data points

  21. Depth to Formation Top and Thickness • Depth useful for determining general structure of formation and degree of folding • Thickness gives idea of pinchouts and volume estimations • Only Fox Hills and Lewis Formations had data for good interpolation

  22. Spatial Analyst • Analysis Mask sets boundary of interpolation • Problems with Kriging • Inverse Distance Weighted includes Null data points

  23. Geostatistical Analyst

  24. Same general shape as Fox Hills

  25. Possible bad data at bottom

  26. Thickens towards top

  27. More Work… • Use ArcScene to develop 3D geologic models of formations • Try to find more data to acquire salinity

  28. Conclusions • GIS illuminated well placement and field location • Geostatistical Analyst provides insight into formation property trends • Free data is good but not good enough

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