Geophysical studies in East Abu Gharadig Basin, Western Desert, Egypt Utilizing Seismic Interpretations and Well Logging Analysis.

Abstract

Abu Gharadig Basin is one of the most prolific basins in the northern part of the Egyptian Western Desert. It attracted the attention of 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. The study area; Amana Field is located in the western part of East Bahariya Concession. It is bounded by latitudes 29º 30' 15" N and 29º 33' 51" N and by longitudes 29º 23' 40" E and 29º 29' 15" E. East Bahariya Concession lies in the northeastern portion of the Western Desert of Egypt in south of the northeast Abu Gharadig Basin and west of Qarun Oil Field. East Bahariya Concession is located between latitudes 29° 20' N and 29° 40' N and between longitudes 29° 20' E and 29° 40' E. It covers gross surface area of 74,000 acres. It is located southwest of Cairo along the Wahat (Bahariya) Road (around 170 kilometers south west of Cairo). East Bahariya Concession, in which the study area is located, is valuable for all petroleum companies due to the availability of petroleum system elements. Where, the primary source rock is interpreted to be the Jurassic Khatatba Shales, with possible contribution from Late Cretaceous Abu Roash “F” Carbonates. The main objectives are the

Bahariya and Abu Roash “G” Sandstones. The shale and carbonate sections of Abu Roash Formation and Upper Bahariya Formation, would provide a top and lateral seals for the main objectives. The main purpose of this study is to evaluate Amana Field by studying subsurface geologic structural features and hydrocarbon trapping of the area using 3D seismic reflection cube through picking and identification of the major structure elements and the horizon packages on seismic sections including interested reservoir markers; Abu Roash “G” Member and Bahariya Formation. Then available well logging analysis is conducted to evaluate the petrophysical parameters of the studied intervals to evaluate the interested formation and reservoir characteristics. It has been carried to determine the volume of shale, effective porosity, lithology identification (sand and carbonate) and fluid saturations (water and hydrocarbon) of Abu Roash “G” Member and Bahariya Formation. The study is subdivided into the following chapters