Integrated Geophysical and Petrophysical Studies for Some Intervals at North Alamein Area, North Western Desert, Egypt.
The main purpose of geophysical science is to rise the value of the natural powerful resources buried in our earth crust. Oil and gas are the most common energy sources which be discovered, which naturally founded in complex subsurface structure. Seismic method is the first recommended subsurface tool to image the structural and any other geological deformation features. North Alamein Field is located in the northern part of the Western Desert with about 130 Km south west of Alexandria city. This located area is situ in Dahab-Mireir Basin. This basin is located in the central remnant of the coastal basin, it trends north-eastward by bifurcated with a southeast extension. The Sharib-Sheiba high borders this basin to the south and Dabaa Ridge borders it to the northwest. Two E-NE ridges are cutting this basin namely Qattara Alamein Ridge and Washka Ridge. The Dahab-Mireir Basin is a Jurassic-L.Cretaceous basin. By the beginning of Early Cretaceous deposition, the basin started to subside more rapidly than the Alamein anticlinal area (Ibrahim, 2003). The most affected structural bone in the area is concerned between the two zones between A/R_B and Dahab Formations, which interpreted by the four main markers to get a good overview for knowing the characteristics for each one according to depositional structural settings. Structure contour maps illustrate the tectonic events which affected the studied intervals leading to formation of a graben structure which located between two major normal faults. This change in modelling capability represents a profound expansion of the modeler’s ability to comprehend the seismic response to complex structure.
The advantage of 3D modelling lies in its capability to allow the interpreter to view and evaluate a structure model by constructing a plausible cross section along any line of section and through any well. Structural 3D model building is the link between the seismic world, where the interpretation of faults, horizons, and other events in seismic data is done, and the reservoir geology world, where a 3D grid with all its properties is built for flow simulations. This structural model building is also the link between the seismic world and other fields of structural geology, such as the simulation of stresses in a field (Gerard de Jager and Raymond, 2006).