الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The Western Desert is thought to be Egypt’s most productive oil region. The study area is in the northern Khalda concession, which is part of Egypt’s Western Desert, on the northeastern edge of the Shushan Basin. It is located about 460 kilometres west of Cairo and about 70 km south of the Mediterranean shore, between latitudes 30o ,51’ and 30o,48’ N and longitudes 26o,42’ and 26o,48’ E. Oil is extracted from the Bahariya, Abu Roash, and Alam El Buieb Formations at the Khalda oil field. The primary exploration objective in the research area is the Bahariya reservoir. Therefore, the primary goal of this study is to evaluate the structure pattern and hydrocarbon potential of the Bahariya reservoir by integrating 2D seismic, well logging data, and other relevant information.
The key structures and their trends are interpreted and mapped using a 2D seismic dataset in the current work. The primary goal of this effort is to develop a 3D geological model and mapping for the entire reservoir package in the Khalda oil field, which consists of the Abo Roash (F), Abo Roash (G), Upper Bahariya, and Lower Bahariya Members layers. Using a 2D seismic dataset, four interfaces were identified, selected, and interpreted. The velocity model was then utilised to translate the two-way time structural maps into depth domain.
The structural definition of the Alam EL-Bueib Formation is one of the most crucial goals. Modelling of the 3D, 3E, and 3G members of Alam EL-Bueib has been done to alter the trap’s relationship to the fault structure. To link seismic data (measured in time) and well data (measured in depth), a synthetic seismogram was built. The structural organization of the Bahariya reservoirs is depicted using seismic data from the Khalda oil field. By showing cross sections in any direction and via any well location of the model’s data base, 3D modelling can be used to show and evaluate a structure model.
Well log analysis of Bahariya reservoir was performed to identify hydrocarbon bearing zones and study reservoir properties based on data from four wells. The main petrophysical parameters needed to evaluate a reservoir are its porosity, permeability, hydrocarbon saturation and thickness. The objective of the present study deals with the determination of the lithology by using different log responses, e.g. gamma-ray logs, porosity logs and different crossplots. This integrated study aims to a qualitative interpretation of well log data and to calculate the shale volume, effective porosity, hydrocarbon saturation, and to predict the net-pay of the producible zones.
The 3D structural model of both Upper and Lower Bahariya units is built based on the seismic interpretation to show that anticlinal features are represented by the most uplifted areas for Upper and Lower Bahariya respectively which constitute the most of trapping in the study area. This feature occupies the western, southwest, and northern parts of the area. The dipping of this anticline is steeper to the East and South and gentler to the West and North, other minor anticlinal features are shown in the eastern and Northeastern corners of the area. On the other hand, synclinal features are shown in the area. The deepest syncline is shown in the south and eastern parts of the area. Other Khalda structure, fault blocks triggering mechanisms are referred to the Miocene event. Most of these fault blocks either tilted toward the depositional basin of the Bahariya Formation or rotated backward. The top of the faulted blocks is covered by alternating sand and shale sediments. The study area is dissected by several northwest-southeast trending normal faults that bound the northward tilted fault blocks of some half-grabens. Also, the N-SW direction profiles indicates the simplicity of the dominant structures represented by simple normal faults and grabens of slight throws and horizontality of the bedding planes.
A methodical analysis of the petroleum system can provide a comprehensive assessment of a basin’s hydrocarbon possibilities over time and place. The Shushan Basin represents the sole region where the Mesozoic source generation mega-sequence took place, according to modelling and experimental source-rock data. The mature source of mixed organic materials used to generate the oil from the Bahariya reservoir. Bahariya oils are believed to have originated from AEB rocks, with little to no contribution from the Khatatba Formation. Normal faults in the region provide access from deeply buried source rocks to shallow reservoirs.
Basin modelling, which also involves a study of the petroleum system, has been used to describe the spatial and temporal scope of the Shushan Basin’s petroleum system. This proof can help guide the next phase of exploration. These findings suggest that, while though oil development is currently adequately centred along the Late Cretaceous and Tertiary migratory paths, deeper areas may have reservoirs with significant untapped gas potential.
Data integration of all input data by Schlumberger’s reservoir modelling programme, PetrelTM. The exploration and development in the future field planning have been supported by the integrated model.