--> Abstract: Depositional Environment and Reservoir Characteristic of the Maragh Formation in the Northeastern Sirte Basin, Libya, by A. M. Sghair and M. A. El Alami; #91012 (1992).

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ABSTRACT: Depositional Environment and Reservoir Characteristic of the Maragh Formation in the Northeastern Sirte Basin, Libya

SGHAIR, ABDUSSALAM M., and MOSTAFA A. EL ALAMI, Petroleum Research Center, Tripoli, Libya

The Maragh Formation of the Upper Cretaceous in the northeastern part of Sirte basin (Jakhirh oil field) provides a subsurface example of an ancient alluvial fan deposit overlain by shallow marine sediments. It forms the basal unit of an Upper Cretaceous transgressive sequence.

The formation consists of shallow marine glauconitic sandstone facies overlying alluvial fan and flood plain argillaceous conglomeratic sandstone facies. Generally, the Maragh Formation has moderate reservoir potential that decreases vertically and laterally, reflecting the complex facies and diagenetic history.

This sedimentological evaluation is based on borehole cores available from six wells in concession 96 (Wintershall Oil Company), and also from different type of logs covering 16 wells drilled in the studied area.

 

AAPG Search and Discovery Article #91012©1992 AAPG Annual Meeting, Calgary, Alberta, Canada, June 22-25, 1992 (2009)