الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Abu El-Gharadig basinis one of the most prolific basins in the northern part of the Western Desert, Egypt. It is attracted the attention of many geologists and geophysicists for oil and gas investigation and exploration. This is due to the huge subsurface sedimentary section exists in the basin which include considerable reservoir rocks within the members of Late Creataceous (Turonian) Abu Roash Formation, Cenomanian Bahariya and Albian Kharita formations. However, Potential source rocks have been encountered within Khatatba Formation and Abu Roash ”F” member. The study area occupies the northwestern of Abu El-Gharadig basin between latitudes 29° 45\ and 30° 05\ N., and longitudes 27° 30\ and 28° 10\ E and constitutes Badr EL Din and Sitra concessions. The present study deals with evaluation the structural framework, stratigraphy, reservoir characteristics, source rock potential and seals. This is to evaluate the petroleum system and hydrocarbon potentialities of the study area. The materials used in this study include complete log sets of fourteen exploratory wells in the study area. These sets include the Composite, Gamma Ray, Caliper, Resistivity (ILD & MSFL), Density (FDC), Neutron (CNL), Sonic (BHC) logs. Lithostratigraphically, Abu El-Gharadig basin comprises rock units ranging from Cambrian to Recent with the oldest sediments resting on the basement rocks. The target formations in the study area are Abu
Roash ”C” and Abu Roash ”G” members, Bahariya and Kharita formations. Early Cretaceous (Albian) Kharita Formation is composed of 107 sandstone interbedded with shales and siltstone. Cenomanian Bahariya Formation consists mainly of sand stones with thin streaks of shales. Sandstones are the main gas and / or condensate pay in Abu El Gharadig basin. Early Turonian Abu Roash ”G” Member consists mainly
of shale,
sandstone and limestone. Late Turonian Abu Roash ”C” Member is
composed mainly of sandstone, shale, and siltstone with some limestone
streakes and deposited in a restricted shallow marine shelf.
Tectonically, Western Desert platform can be subdivided, from south to
north, into four units: Craton and Stable shelf,Unstable shelf, Hinge Zone
and Miogeosyncline. The sedimentary basins of the north Western Desert
occupy two provinces: the northern province and the southern province,
which separated by the E-W to ENE trending Ras Qattara-North Sinai
uplift. Abu El-Gharadig basin is subdivided into several structural units
separated by NE/SW trends, named from E to W: the Mubarak High, Abu
El-Gharadig Anticline and Mid Basin Arch.
Structurally, three different types of faults affect Abu El- Gharadig
basin. These are normal, reverse and strike –slip (right – and left – lateral)
faults. The normal faults are the most predominant of these types and
mainly trend E-W, ENE and WNW wards. The reverse faults are
relatively few with ENE and E-W trends, while the strike slip faults are
rarely encountered. Small number of folds is present in Abu El- Gharadig
represented by anticlines and synclines.
Well logging: Explain how the program (IP) worked, explain available
data for this study, explain equation that are generally used to measure
properties petrophysical and explain equation that we used in the current
study. The work of some examples of some wells in the study area, such
as raw data and corrected, the methods used to calculate the volume of
the shale and the methods used to calculate the porosity, as well as to
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determine the water saturation and hydrocarbon saturation and explain
method in which calculating the volume of the shale.
Petrophysical studies considered that Abu Roash (C) Member is the main
reservoir in the Upper Cretaceous succession in the study area. As it has
average value of effective porosity of 22% and average value of shale
volume (Vsh) 17.3% and average value of water saturation (Sw) 42%.
The net reservoir thickness of Abu Roash (C) member is considerable
mainly in the western, eastern and central parts of the area while the net
pay thickness of Abu Roash (C) Member show that the distribution
pattern points to the weastern and central parts of Abu Roash (C) are
more promising sites for hydrocarbon exploration.
Core Analysis: Petrophysical studies were carried out on (58) cylindrical
samples of the studied Upper Creataceous (Turonian) Abu Roash
Formation. The Petrophysical studies include: storage capacity.
The storage capacity which includes (bulk density, porosity and
permeability). The porosity data for the selected samples at BED15-3 Oil
Field indicated that the porosity varies from 1.7% to 20.2 % with a mean
value of 17.64%.
The analyses of the permeability for the selected samples for at
BED15-3 Oil Field in the studied area indicates that the permeability
varies from 0.6 md and 1052 md with a mean value of 524.6 md and
Standard .
The bulk density for the selected samples of at BED15-3 Oil Field
indicated that the bulk density varies from 2.63 gm/c3 to 2.86 gm/ c3 with
a mean value of 2.66 g/c3.