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

Abstract

An integrated interpretation utilising seismic data and inverse modelling is executed to morereveal 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.

Hydrocarbon Reservoir Characterization in the Challenging Structural Setting of Southern Gulf of Suez: Synergistic Approach of Well Log Analyses and 2D Seismic Data Interpretation

“…The Ras Ghara oil field exhibits a stratigraphic succession characterized by a thick Miocene section encompassing the Nukhul, Rudeis, Kareem, Belayim, South Gharib, and Zeit Formations. The sedimentary layers of the Post-Zeit Formation overlay these Miocene sequences [15,27,34,42,43,49].…”

“…These challenges can result in inadequate transmission of seismic energy, leading to limited or no energy reaching the ground surface. [13][14][15].…”

“…2D seismic data interpretation is constrained by the base of Miocene evaporites, with the Kareem-Rudeis interface being the deepest reliable boundary. An integrated interpretation was conducted to address the seismic failure by utilizing potential field data, seismic reflection, and well data, employing the inverse modeling technique [15].…”