Integration of 2D Seismic Data Interpretation and Seismic Attributes to Delineate the Subsurface Configurations in Ras Gara Area, Southern Gulf of Suez, Egypt

Abstract

A grid of2D marine seismiclineswas interpreted and treated with seismic attributes to delineatethe subsurface structures and disclose the hidden features. The ordinary steps of seismic reflection analysiswere carried out to getmeaningfulimages of Miocene.structures through constructing aset oftwo-way time structure mapsfor fivetargets.In addition, the seismic attribute enhancement procedures were implementedto best visualize salt/subsalt source structures. Bothof structural and stratigraphictypes of seismic attributes wereapplied on time migrated seismic sections to allow significant improvements in the fault detection and geometry of the strata. Theresults of seismic interpretationindicate presence of a salt diaper on top of South Gharib Formation, underlain by a Pre-Mio. (PM) uplift and flanked by dipping limbs to the east and west.The subsalt sectionis deformed by NW-SE (Clysmic)faults,which inherited from old fractures on top of basement along lines of weakness.The inner structure of the block exhibits a lack of the NE-SW-trending (cross-gulf) faults. The structural attributeshighlightnumerous hairline fracturesof small displacements disturb thePre-Miocenesectionandreducedin number at theMiocenelevel.The stratigraphic attributes filters succeeded to delimit lithological boundaries changes, trace salt contacts, and define “bright spots”with respect to hydrocarbon reservoirs.Generally, the dip-reversals along the diapir flanks andlimbs of the PMupliftare believed to be the most potential traps.