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Lithology, diagenesis, and depositional environment of the (Mississippian) Barnett Shale and limestone in the Dangelmayr A#7 core in the Fort Worth Basin, Cooke County, Texas
Ashley, Tyler Lee
Ashley, Tyler Lee
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[Fort Worth, Tex.] : Texas Christian University,
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2014
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Abstract
The Barnett Shale is an unconventional reservoir that has produced 10.8 TCF (trillion cubic feet) of natural gas since 1993. Favorable economics and technological advances in drilling and completion methods in the Barnett Shale resulted in an increased interest and activity in exploring for and developing other similar unconventional shale gas reservoirs, and more recently due to a stable market price, shale oil reservoirs. The EOG Dangelmayr A#7 is a 762.6 foot (~232 m) continuous core extracted proximal the Muenster Arch in Cooke, County Texas. Core description and analysis reveal a complex sedimentary environment during the Late Mississippian (~325 Ma). Eleven different facies include mudstones, wackestone, packstones, and grainstones. The facies are a product of deep marine sedimentation, sediment gravity flows, and diagenesis. Reactivation of the Muenster Arch altered the depositional environment from slow deposition to rapid deposition. Major basement uplifts took place after Barnett deposition (Early to Mid-Pennsylvanian).
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Geological Sciences