Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Geology

The study Alam Elshawish west area lies around 300 km west of Cairo and just over 200 km southwest of Alexandria, in the prolific western desert hydrocarbon province. The study area is 876.9 km2, and seven fields have been discovered to date. The reservoirs of interest are of late albian-cenomanian age, Bahariya formation and AbuRoash 2G3 member, were deposited during a transgressive period, and brought on by continued thermal subsidence during the cretaceous passive margin. The upper albian-aged lower and the bottom part of the middle Bahariya consists of shoreface sediments mainly siliceous kaolinitic massive to interlaminated sandstones, while the lower cenomanian-aged top middle and upper Bahariya is made up of shoreface to inner shelf system being more silty and bioturbated sandstones. Upper cenomanian is represented by the AbuRoash 2G3 member consisting mainly of a complex of sand, shale and carbonates within shoreface to inner shelf system. With the increase in sea level during the late Cenomanian and into the beginning of the turonian, the AbuRoash F member consists of open marine limestone deposits. It provides excellent source rock potential with significant volumes of hydrocarbon across the northern part of the study area. The Jurassic Khatatba Formation is also identified as having excellent source rock potential throughout the middle and southern sectors of the study area. The traps in AESW tend to be combined structural stratigraphic types. This is largely attributed to the late Cretaceous-Early Tertiary reactivation and tectonic inversion of NE-SW trending Syrian arc faults

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