Structural setup of Gara Marine area as deduced from 3D seismic interpretation and gravity-magnetic modelling, Gulf of Suez, Egypt

摘要

An integrated interpretation utilising seismic data and inverse modelling is executed to more-reveal the subsurface complexity in Gara Marine area. The shallow features are identified by doing the seismic analyses on tops of Miocene formations. The deeper structures are deduced through constructing two gravity-magnetic models constrained by seismic and well data. The seismic results indicate that upper-Miocene rocks are characterised by a thick salt section (~2Km), which rarely cut by faults. South Gharib exhibits a structural closure at the centre due to a salt dome with dipping limbs towards the east and west. Belayim and Kareem are thinner in thickness, uniform distribution and steeply dipping to the southwest. Rudeis seems thicker westward, deposited in the downthrown side of a master block-fault. The uncertainty in seismic interpretation due to Miocene salts is estimated on tops of different horizons (±70 m static). The models indicate that Pre-Miocene sediments were deposited on a rough basement surface, with southwest regional dip-regime. The basement is deformed by the cross-faults (NW and NE) which vanish within Miocene section, with no evidences support presence of magmatic materials. The dip-reversal along flanks of Miocene salt structure, and limbs of pre-Miocene uplift, are the most potential traps.