Secondary carbonate porosity as related to early teritiary depositional facies, Zelten field, Libya

Journal Article · Tue Apr 01 00:00:00 EDT 1975 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6921117

Bebout, D G; Pendexter, C

Production from the Zelten field, Libya, is from the highly porous shelf limestones of the Zelten Member (Main Pay) of the Paleocene and lower Eocene Ruaga Limestone. Fifteen facies are recognized, mapped, and predicted. Seven of the facies comprise the larger part of the Zelten Member. These include miliolid-foraminiferal micrite, argillaceous bryozoan/echinoid micrite, argillaceous-molluscan micrite, coralgal micrite. Discocyclina-foraminiferal calcarenite, foraminiferal calcarenite and micrite, and Discocyclina-foraminiferal micrite. In the Zelten field secondary porosity is recorded as much as 40%; this porosity is related to the original depositional fabric of the sediment and, therefore, is facies controlled. Porosity is highest in the coralgal micrite and Discocyclina-foraminiferal calcarenite, which together form a NW.-SE. trend across the N. part of the field, and in the formaniniferal calcarenite and micrite. (10 refs.)

• Research Organization: Exxon Production Res. Co.
• OSTI ID: 6921117
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 58:4
• Country of Publication: United States
• Language: English

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02 PETROLEUM
58 GEOSCIENCES
CARBONATE ROCKS
POROSITY
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RESERVOIR ROCK
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