Sand Fairways Delineation by Post-Stack Seismic Inversion and Seismic Wave form Classification Integration, Sitra Area, North Western Desert, Egypt

Abstract

Abu Roash ‘C’ and ‘E’ oil and gas reservoirs are targets of the most exploration and development wells in Sitra concession, which is in the northern part of the Egyptian Western Desert. Delineation of a fairway of reservoir quality Cretaceous Albian sandstone (Abu Roash C and E Sand) in Sitra Concession of the Abu El-Gharadig basin is one of the key challenges for the success of exploration and development wells. The integration between post stack seismic inversion and seismic wave form classification is important to identify the sand distributions and reservoir geometries. The aim of this work is illustrating the uses of such seismic interpretation techniques in revealing the structural and stratigraphic elements of two main reservoir units. The study of reservoir distributions is one of the main elements needed to be known for oil and gas exploration and exploitation, in addition to uncertainty analysis of volumes calculations. In this work, seismic wave form classifications SWC and post stack seismic inversion techniques were carried out for the available seismic data and output on two surfaces: the first horizon corresponds to the top Abu Roash C and the second horizon corresponds to the top Abu Roash E, which are the main reservoirs in the area.