| Abstract: | The Upper Devonian and Lower Mississippian Woodford Shale is a black, organic-rich shale that is a major hydrocarbon source rock in the Anadarko basin. With the onset of oil generation, nonconductive hydrocarbons begin to replace conductive pore water in the Woodford, and formation resistivity increases. Crossplots of formation resistivity versus either vitrinite reflectance (RO) or Lopatin‘s time-temperature index of thermal maturity (TTI) define two data populations that represent immature shales and shales that have generated oil. The midpoint of the resistivity zone marking the transition between immature and mature shales is -35 ohm-m. The onset of appreciable oil generation in the Woodford Shale of the study area occurs at maturity levels of RO near 0.57% and of TTI between 33 and 48. |
| Genre: | Book chapter |
| ProdID: | 70044342 |
| Citation Author: | Schmoker, James W.; Hester, Timothy C. |
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| Citation End Page: | 266 |
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| Citation Language: | English |
| Citation Larger Work Title: | Anadarko Basin symposium, 1988 (Circular 90) |
| Citation LatN: | 37.0 |
| Citation LatS: | 33.62 |
| Citation LonE: | -94.43 |
| Citation LonW: | -103.0 |
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| Citation Online Only Flag: | |
| Citation Phsyical Description: | 5 p. |
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| Citation Public Comments: | Proceedings of a symposium held April 5-6, 1988, at Norman, Oklahoma; cosponsored by the Oklahoma Geological Survey and the U.S. Geological Survey |
| Citation Publisher: | Oklahoma Geological Survey |
| Citation Series: | Circular |
| Citation Series Code: | CIR |
| Citation Series Number: | 90 |
| Citation Search Results Text: | Formation resistivity as an indicator of the onset of oil generation in the Woodford Shale, Anadarko Basin, Oklahoma; 1989; Book chapter; CIR; 90; Other Government Series; Anadarko Basin symposium, 1988 (Circular 90); Schmoker, James W.; Hester, Timothy C. |
| Citation Start Page: | 262 |
| Citation Volume: | |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Formation resistivity as an indicator of the onset of oil generation in the Woodford Shale, Anadarko Basin, Oklahoma; 1989; Book chapter; CIR; 90; Other Government Series; Anadarko Basin symposium, 1988 (Circular 90); Schmoker, James W.; Hester, Timothy C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.ogs.ou.edu/pubsscanned/Circulars/Circular90.pdf |
| Date Other: | Tue, 1 Jan 2013 00:00 -0600 |
| Publisher: | Oklahoma Geological Survey |
