Subsurface stratigraphic analysis, lower Hoxbar Group (Pennsylvanian), Dutton-Verden-Norge trend, Caddo and Grady counties, Oklahoma

Journal Article · Fri Dec 01 04:00:00 EST 1972 · Shale Shaker; (United States)

OSTI ID:5007692

Sawyerr, O A

This investigation involves a stratigraphic analysis of the lower part of the Late Pennsylvanian (Missourian) Hoxbar Group, which attains a total thickness of 2,800 ft in this area. The Marchand Sand is the only sand of economic importance to date in the area investigated. The major objectives of this investigation were (1) to determine the geometry of the Marchand Sand; (2) to reconstruct the paleodepositional environment of the sand; and (3) to determine the relative importance of structure vs. stratigraphy in oil accumulation in the Marchand Sand. The Marchand Sand appears to be marine offshore bars, the tops of which have been partially truncated during a still-stand or regression of the sea. Vertical and lateral variations in porosity and permeability in the reservoir rocks result in oil accumulation in upper, middle, lower and even multiple units within the sand. Structure exerts only minor effects upon accumulation/ the trapping mechanism being essentially stratigraphic. (20 refs.)

• Research Organization: Shell PB Petr. Dev. Co. Nigeria Ltd.
• OSTI ID: 5007692
• Journal Information: Shale Shaker; (United States), Journal Name: Shale Shaker; (United States) Vol. 23:4; ISSN SHSKA
• Country of Publication: United States
• Language: English

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