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Kansas Geological Survey, Open-file Report 2009-5

Preliminary High-Resolution Stratigraphic Analysis of the Caney and Woodford Shales in a Continuous Shallow Corehole (KGS-OGS Current #1) from the Lawrence Uplift in Pontotoc County, Oklahoma

W. Lynn Watney, Darwin R. Boardman, Neil H. Suneson, Jim Puckette, Thomas L. Thompson, John H. Doveton, Evan K. Franseen, John R. Victorine, Kenneth Stalder, and Robert Walton

KGS Open File Report 2009-5
May 2009

Statement of Problem


  1. Late Devonian- to Chesterian-age basinal shale-rich strata are increasingly important domestic unconventional oil and gas reservoirs,
  2. Extending resource development in the greater Anadarko-Arkoma-Ft. Worth foreland basins from core-producing areas requires an understanding of spatial variations of critical shale properties.
  3. A classic interaction of major global and regional processes appears to be responsible for these new hydrocarbon resources including recurring basin anoxia, long- and short-term changes in eustasy, climate change, differential sedimentation and basin subsidence, spatial-temporal changes in fault system dynamics, and strong diagenetic variations.
  4. Stratigraphic analysis, namely establishing temporally distinct depositional sequences, is critical to mapping the distribution of favorable reservoir rocks. The preliminary analysis thereof for the KGS-OGS Current #1 corehole was presented.
  5. Depositional sequence analysis once conducted on a regional level as proposed in an extended coring program from shelf-to-basin should provide the means to establish a high-resolution paleogeography.
  6. Sequence stratigraphic interpretations and paleogeographic reconstructions substantiated with biostratigraphic, paleoecologic, geochemical, and chronostratigraphic information from strategic coring sites integrated with conventional analytical data about the resource (e.g.., Rock Eval, gas desorption, rock properties) should help establish additional oil and gas resources.
  7. The extent of these unconventional oil and gas resources onto the surrounding shelf margins during episodes involving expanding anoxia and upwelling and increased organic productivity has yet to be delineated and is an outcome sought in this ongoing investigation.
  8. Integration with global processes active in creating these oil and gas resources should aid in extending these results to other basins worldwide.
  9. This approach to studying shale resources parallels those of modern characterization of conventional reservoirs and, in fact, will aid in resolving long-standing correlations both regional and global.

The complete text of this report is available as an Adobe Acrobat PDF file.

Kansas Geological Survey, Energy Research
Updated May 21, 2009
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