Impact of Sedimentologic Diagensis on the Petrophysical Evaluation of the Reservoir Rocks in BED-1 Field, Western Desert, Egypt

Abstract

Badr EI-Din 1 (BED-1) field is one of the most prolific areas in the Western Desert and is a part of Badr EI-Din Concession, 300 km west of Cairo, and to the west of Abu Gharadig Field. The available open hole well records contain complete logs in the form of composite (Gamma-Ray, Density, Neutron, Sonic and Resistivity of logs four wells. These wells are BED 1-2, BED 1-4, BED 1-10 St/1 and BED 1-11. The main objective of petrophysical analysis of Kharita and Bahariya reservoirs, was to evaluate the petrophysical characteristics and sedimentlogic diagnosis on hydrocarbon potentialities. The petrophysical evaluation of the Kharita and Bahariya reservoirs reveals that the shale volume, effective porosity, water saturation, hydrocarbon saturation and net-pay thickness vary from 2.20 to 9.50%, 11.70 to 26.50%, 19.70 to 52.60%, 47.40 to 80.30% and 3.20 to 61.98m respectively. The BED 1 field main reservoirs were deposited in distinctive environments, which affect the petrophysical characteristics. However, Bahariya Formation shows decreasing the shale volume and increasing the pay thickness in the northeast and south directions. Kharita Formation illustrate a discrease shale volume eastward and while increasing southeastward, by the pay thickness increasing eastward. The effective porosity and hydrocarbon saturation increasing in the same direction. Generally, the structural setting controls the distribution of the effective porosity and the hydrocarbon saturation of the BED-1 Field.