Fractured Carbonates as a Significant Secondary Reservoir in Qarun Field, Western Desert, Egypt

By

 Ali Khairy¹, Hossam Ibrahim¹, Wafaa A. Ali², Khaled Abu El Yazied¹

(1) Qarun Petroleum Company, N/A, Egypt (2) Ain Shams University, Cairo, Egypt

 Qarun Oil Field lies on the Southeast flank to the Kattaniya uplift and the Northwest Flank of the Gindi basin. Oil is produced from NE plunged anticlines of Cretaceous age ( L.Bahariya & Kharita sandstone), bounded by reverse faults on their North Western sides and dissected by NW-SE normal faults.

Significant high gas and oil shows were observed while drilling of Apollonia carbonates and Abu Roash C and D carbonates in some wells. Accordingly two wells were drilled specially to evaluate these secondary objectives. Oriented cores, FMS, and Petrophysical analysis showed that fracture porosity accounted for the pore space .Oil has been tested and produced from the two wells.

Oil migrated updip towards the structures of Qarun field along the leaking segments of the NW - SE faults. These faults act as conduits for oil that reached the fractured Apollonia carbonates on the up thrown side of the faults and Abu Roash C & D carbonates in the silver blocks

This paper highlights the importance of the fractured carbonates as a secondary objective in Qarun area