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The AAPG/Datapages Combined Publications Database
Oklahoma City Geological Society
Abstract
Petroleum Migration Through Basement in Southwest Oklahoma, U.S.A.
Abstract
Hydrocarbon occurrences hosted both in Cambrian igneous rocks and in Lower Permian clastic sedimentary rocks surrounding the Wichita Mountains are anomalous for lack of obvious local hydrocarbon source rocks. Study of the petrology and geochemistry of three occurrences, one newly established, shows that they have similar sources which are likely linked to the well-known Late Devonian–Early Mississippian Woodford Shale of the Anadarko Basin. Consideration of the structural setting of the Wichita Mountains area indicates where the source Woodford Shale must be located. The location suggests that vertical oil migration pathways would have to traverse through kilometers of igneous rock. Available evidence indicates some of this migration is Quaternary and still occurring.
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