الفهرس 
REGIONAL GEOLOGICAL SETTING
Seismic InterpretationOnly 14 pages are availabe for public view
Abstract
Mayhoub, Ahmed Abdel Sattar. Structural Setting and Reservoir characterization of
Syn-Rift, Facies, West Gebel El-Zeit, Gulf of Suez, Egypt. Unpublished Doctor of
Philosophy dissertation, Ain Shams University, 2018.
The study area including Al Amir and Geyad oil fields (onshore Northwest Gemsa) is
located in west Gebel El Zeit area, covering an area of about 39 km2 & 26.4 km2,
respectively. The study covers the PetroAmir, Geyad and Al Amir concessions and is
based on 2D seismic data and nine wells (Shehab-1X, Geyad-2X, Geyad-1X, Al
Amir SE-1X and st, Al Amir SE-2X, Al amir SE-3X, Al Amir SE-4X, Al Amir SE-
5X and Al Amir SE-6X). The study is aimed to highlight the reservoir
characterization and structural configuration of the syn-rift facies.
The study examines the selected nine wells in which the penetrated Miocene
stratigraphy from bottom to top section includes; Nukhul, Rudeis, Kareem and
Belayim formations. The Nukhul Formation is recorded only in Geyad-2x, Al Amir
SE-1x, Al Amir SE-1xSt wells but it is not recorded in other wells due to incomplete
drilling. The faults in the study area are dip-slip faults of NW-SE trend. Four major
NW-SE trending normal dip-slip faults are picked (F1, F7, F10 and F12).
These parallel clysmic faults produce tilted fault blocks with dip direction
toward the SW. These clysmic faults dissect all the syn-rift section (from
Nukhul to Zeit formations) except F12 which dies out in the Rudeis
Formation. F2 and F8 faults are NW-SE trending secondary normal faults
with downthrow toward the NE direction (antithetic faults). In addition, there
are some cross faults oriented NE-SW, which bound the reservoir blocks.
There are five wells that have cores in the Kareem Formation. The different
lithofacies are derived from the study of the sedimentary sequences of Kareem
Formation in the five cored wells. These wells are Al Amir-3X St2, Al Amir-4X, Al
Amir-5X, Al Amir-6X and Geyad-2X. The study revealed the recognition of four
main facies groups, divided into 13 sub facies. Generally, the cored intervals
represents cyclic alternations of hemipelagic sedimentation with dominance of
carbonate and mudstone facies interrupted by some debris flow pulses with deposition
of massive sandstones and conglomerates (stratified sandstone turbidities). The cored
intervals of the five cored wells represent a part of distal submarine lobes in opendeep
marine setting . The reduced sand thickness and the dominance of hemipelagic
facies indicate the deposition in a distal setting away from the main bounding source.
The reservoir units do occur mainly in the main facies (Gm, Sm and Sh).
In the present work the wireline logs, especially Gamma Ray logs are used in the
application of the cyclolog® software to build a cyclicity pattern of the nine study
wells. The penetrated section is distinguished into six main 3rd order sequence
stratigraphic cycles. Cycle 2.4 represents the Kareem Formation of the study interval.
The interpreted 2D seismic data, electrical logs from nine wells and core data from
five wells were used to construct a 3D static model for the different blocks of Al Amir
and Geyad fields. These main fields are subdivided into 2 blocks and the main
reservoirs is within the Kareem Formation.
Key words: Gulf of Suez rifts, Al Amir and Geyad oil fields, West Zeit Basin,
Cyclicity, cross faults.