--> Abstract: Sequence Stratigraphy of the Red Fork Sandstone (Middle Pennsylvanian) in the Vicinity of Southeast Thomas, Squaw Creek, and Bridgeport Fields, Anadarko Basin, Oklahoma, by Cristy A. Houston and Dennis R. Kerr; #90078 (2008)

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Sequence Stratigraphy of the Red Fork Sandstone (Middle Pennsylvanian) in the Vicinity of Southeast Thomas, Squaw Creek, and Bridgeport Fields, Anadarko Basin, Oklahoma

Cristy A. Houston and Dennis R. Kerr
University of Tulsa, Tulsa, OK

The Red Fork sandstone has had a long history as an important oil and gas producer in the Anadarko Basin. Previous geologists have proposed lithostratigraphic subdivisions/correlations of the Red Fork; however, few if any agree on a common scheme. These differences tend to influence views on the depositional origin of the Red Fork. This study has taken a sequence stratigraphic approach to correlation and to mapping; this effort aims to provide a new perspective on the distribution of known production and provide additional insights to future drilling prospects.

The Red Fork is divided in to seven stratigraphic sequences between the underlying Inola limestone and overlying Pink limestone. Along sequence boundaries, typical local maximum erosional relief is 20 ft with the highest relief of 100 ft observed in the Squaw Creek area. Incised valley fill deposits blanket the areas of highest relief, and included braided fluvial, estuarine and meandering fluvial facies. Thin sandstone-mudrock couplets that successively thin upward and terminate in a basin-margin direction constitute the retrogradational parasequence sets of the transgressive systems tract. Very thin mudrock intervals with distinctive well log expressions are regarded as condensed (or compressed) sections. These are laterally continuous except where truncated by younger sequence boundaries. Above and downlapping onto the condensed sections are sandstone-mudrock couplets that thicken and coarsen upwards; these are regarded as the progradational parasequence sets of the highstand systems tract. Outside of the areas of deep incision, the sequence boundaries are placed between the subjacent highstand systems tract and superjacent transgressive systems tract deposits.

 

AAPG Search and Discover Article #90078©2008 AAPG Annual Convention, San Antonio, Texas