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Document Type

Original Article

Subject Areas

Earth science

Keywords

Sidi Rahman; reservoir characterization; 3D reservoir modelling; fault seal analysis; Western Desert; Egypt

Abstract

Sidi Abdel-Rahman oil field is represented in this study by four wells, two of these wells are oil-productive wells (Sidi Rahman-1 and Sidi Rahman-2) while the other two wells are considered dry wells (Sidi Rahman-3 and Sidi Rahman-4). The main object of the study is to illustrate the differentiation of oil potentiality between the four wells. The main reservoirs lie in Bahariya and Kharita Formations. The workflow started by picking selected horizons from the seismic data and detecting the geological structures. Two sets of normal faults represented in this area the first is (F1, F3 and F4) which have downthrown side northward, and the second set is (F2 and F5) and have downthrown side southward (Figures 3, 4 and 5). Then by using the electric logs the petrophysical parameters are calculated for the reservoirs in the study area and correlated between these reservoirs in the different wells. By using the seismic interpretation and petrophysical analysis we could build 3D reservoir modelling and use the fault seal analysis technique to justify the hydrocarbon distribution around the NW-SE fault (F2) and define its role in sealing or discharging. The results are interpreting seismic sections, horizon maps to represent the geological structure of the study area, a 3D reservoir model with different intersections showing the petrophysical parameters differentiation, and fault seal analysis diagrams. It found that Sidi Rahman-3 reservoirs are deeper than the other wells, while Sidi Rahman-4 is close to (F2) which is likely to be sealed but intersected by another fault (F1) that might be the discharging factor.

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