Sandstone petrology and diagenesis of lower Tuscaloosa Formation reservoirs in McComb and Little Creek field areas, southwest Mississippi

Conference · Tue Sep 01 00:00:00 EDT 1987 · AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)

OSTI ID:5783510

Hamlin, K H; Cameron, C P

Two major depositional facies characterize producing lower Tuscaloosa Formation (Upper Cretaceous) sandstone reservoirs in the McComb-Little Creek field areas: a lower fluvial sequence (Denkman sand) topped by nearshore marine deposits (McComb sand). Petrographic studies reveal that the sandstones of both fields were deposited as very fine to medium-grained quartzarenites and quartz litharenites. Petrographic and x-ray diffraction analyses of the clay mineral content of the sandstones indicate that most of the clays are authigenic and comprise a suite which includes chlorite, kaolinite, mixed-layer illite/smectite, and illite. Mixed-layer illite/smectite appears to be considerably more abundant in the McComb reservoir sandstones than at Little Creek. The reservoir sandstones in the McComb and Little Creek fields are highlighted by good secondary porosity (3-27%, average 19%) developed through dissolution of rock fragments and carbonate cements.

• Research Organization: Univ. of Southern Mississippi, Hattiesburg
• OSTI ID: 5783510
• Report Number(s): CONF-8710198-
• Journal Information: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States), Vol. 71:9; Conference: Gulf-Coast Association of the Geological Society and Gulf-Coast Section SEPM meeting, San Antonio, TX, USA, 28 Oct 1987
• Country of Publication: United States
• Language: English

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