Red Fork sandstones (lower Pennsylvanian) in deeper parts of Anadarko basin, Oklahoma

Conference · Mon Aug 01 00:00:00 EDT 1983 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6383891

Whiting, P H; Levine, S D

Red Fork sandstones in the deeper part of the Anadarko basin are the downdip equivalents of fluvial and deltaic sandstones in the Cherokee Group. The sandstones have repetitive, ordered sequences of sedimentary structures in vertical section. Individual bedsets display sharp basal contacts, gradational tops, and contorted bedding. The characteristics indicate these basinal sandstones were deposited by turbidity currents. The sandstones occur as narrow, linear constructional channels that are dip-trending. The lateral change from channel-fill to overbank facies takes place abruptly. The sandstones are very fine-grained litharenites with an average composition of 58% quartz, 8% feldspar, 17% rock fragments, 5% other grains, and 12% matrix. Cement consists mainly of calcite ranging from 2 to 40% of the bulk volume. Quartz content tends to decrease upward and matrix increases upward within bedsets. The compositional grading is accompanied by a decrease in grain size upward within bedsets, indicating deposition during a decreasing flow-regime. Red Fork sandstones are low-permeability reservoirs with an average porosity and permeability of 7.8% and 0.1 md, respectively. Natural gas reservoirs occur mainly in the thicker, channel sequences. The bedding character of the channel and overbank facies is reflected in ..gamma..-ray log responses. Log characters of the two facies are used to interpret turbidite sections of uncored areas. The interpretations are adapted to the East Clinton field for prediction of constuctional channel reservoirs. The interpretation of dip-trending turbidite deposits may aid in exploration and development of the Red Fork sandstones.

• Research Organization: Tenneco Exploration and Production Co., Denver, CO
• OSTI ID: 6383891
• Report Number(s): CONF-831039-
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 67:8; Conference: International coal testing conference, Lexington, KY, USA, 24 Oct 1983
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
OKLAHOMA
NATURAL GAS DEPOSITS
RESERVOIR ROCK
LITHOLOGY
PERMEABILITY
POROSITY
EXPLORATION
PENNSYLVANIAN PERIOD
RESOURCE DEVELOPMENT
SANDSTONES
SEDIMENTARY BASINS
FEDERAL REGION VI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINERAL RESOURCES
NORTH AMERICA
PALEOZOIC ERA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
030200* - Natural Gas- Reserves
Geology
& Exploration