Determination of Some Reservoir Characteristics of the Bahariya Formation in Bed-1 Field, Western Desert, Egypt, by Using the Repeat Formation Tester

Abstract

Repeat formation tester (RFT) data are used for interpreting some reservoir characteristics such as the nature of fluids and permeability for the Bahariya formation by using five wells in the Bed-1 Field in the Western Desert of Egypt. The Schlumberger RFT is an open hole wireline device showing a continuous recording of the pressure leads to construct the pressure gradient. These gradients give information about the fluid density and then the nature of fluids (gas, oil, and water). Also the depths of contacts between water and hydrocarbon products can be located by the abrupt change in the pressure gradients. The permeabilities of Bahariya formation are evaluated qualitatively by the direct interpretation of the pressure curve recorded at each test and quantitatively by the analysis of drawdown pressure data. Moreover, the porosities of reservoir rocks were determined by using the available logs of density and neutron. These porosities were corrected for the effect of shale. Also, the saturation of hydrocarbon is determined and then these values of porosities and saturation of hydrocarbon are presented zonewise to show their vertical variation within the wells.