HYDROCARBON POTENTIALITY IN ABU SENNAN BLOCKS, WESTERN DESERT, EGYPT

Abstract

The Abu Sennan block as a part of Abu Gharadig basin is producing hydrocarbon from Upper Cretaceous reservoirs in the three block partitions: SWS, GPT and GPY. Several attemps to explore the deep Masajid, Alam El- Buieb and Alamien reservoirs, but they are failed and considered as dry wells, except one. The main objective of the present work is to study the hydrocarbon potentiality of the deep Jurassic and Early Cretaceous reservoirs (Masajid, Alam El-Buieb, and Alamien), in addition to early Late Cretaceous reservoirs (Bahariya and Abu Roash “G”). The work permits the chance to evaluate the structural model postulating from the seismic and gravity interpretation. Lack of core data for the deep reservoirs only permits interpretation, the depositional facies, and reservoir characterization of the shallow targets (Bahariya and Abu Roash “G”). The structural configuration of the Abu Sennan area output from the structural contour maps and seismic structural attributes, it is represented by a group of en'echelon normal faults having the NE-SW orientation. These faults were intersected by NW-SE normal faults that were formed in the Early Cretaceous time. Five segments are identified along the Jurassic half graben. During Late Cretaceous-Middle Eocene time, the en'echelon normal faults suffered positive structural differential inversion along the Jurassic fault segments. The flattened seismic line perpendicular to the half graben at both Dabaa, Khoman and Abu Roash “C” horizons shows the inversion pulses associated with a clear onlap sediments on the top of both Khoman Formation and Abu Roash “C” Member. Some stratigraphic attributes were done for the Alamien/Bahariya levels, which are not conclusive owing to the carbonate facies and data deterioration.