Regional controls of gas accumulation in Oriskany Sandstone, central Appalachian basin
Available literature and production data were used to compile maps of stratigraphic relationships, structural configuration, and production trends of the Oriskany (Ridgeley) Sandstone, Lower Devonian (Deerpark Stage). Many of the Oriskany gas fields that occur in the western basin and northern portions of the Low Plateau and High Plateau provinces are stratigraphic traps associated with the Oriskany pinch-out. This pinch-out is a result of preand/or post-Oriskany unconformities, which are more pronounced along the basin margin. Pinch-out fields are characterized by intergranular porosity that probably developed soon after deposition on pre-Middle Devonian topographic highs. Entrapment generally results from an updip permeability barrier against the pinch-out. Oriskany fields that are not associated with the pinchout are in structural traps characterized by fracture porosity and entrapment along anticlinal highs or against faults. Fields of this type are more common in the central and eastern parts of the basin, especially in the High Plateau province and the Valley and Ridge. Oriskany production is generally absent from areas within the Low Plateau province that are not in proximity to the pinch-out. This unproductive trend coincides with an area of gentle structural deformation and the occurrence of Huntersville Chert directly above the Oriskany.
- Research Organization:
- George Mason Univ., Fairfax, VA
- OSTI ID:
- 6356377
- Journal Information:
- Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 69:5; ISSN AAPGB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
030200* -- Natural Gas-- Reserves
Geology
& Exploration
APPALACHIA
CHERT
DEVONIAN PERIOD
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOLOGIC TRAPS
GEOLOGY
GEOMORPHOLOGY
MAPS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
PALEOZOIC ERA
PERMEABILITY
PETROLEUM GEOLOGY
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
STRATIGRAPHY
TOPOGRAPHY
USA