Integrated Seismic Reservoir Description Study in Ras Fanar - Egypt

By

Hassan Hussein Sabry¹, Tarek Nafie Nafie², Stefano Volterrani³

(1) Cairo University, Giza, Moahandseen, Egypt (2) Cairo University, Giza, Moahandseen, Egypt (3) Rom University, Egypt

The Ras Fanar field is located on the western side of the Gulf of Suez, approximately 3 Km East of Ras Gharib. The field was discovered in April 1978 by exploratory well KK84-1. The field is a narrow, elongated pre-Miocene structure horst block aligned NW-SE and tilted towards the North East with an average dip of 20 degrees. The middle Miocene limestone unconformity overlies the pre-Miocene strata as a sheet like bank. This bed is directly covered by a growth of reefal build-ups of irregular and scattered configuration of Nullipore rock. Both represent the main reservoir body in the Ras Fanar field.

The SRD (Seismic Reservoir Description) approach to seismic and wireline data processing was adopted for the prediction of the lateral extent of the reservoir and the mapping of the reservoir petrophysical parameters. The high-resolution data that provided by the SRD processing has allowed the interpretation of subzonation within the Nullipore reservoir.

Petrophysical properties such as porosity are normally supplied by the available borehole information. These measurements are generally accurate in depth, but their lateral penetration is very shallow. Surface seismic measurements are laterally continuous, but of low vertical resolution and provide acoustic rather than petrophysical information. The adopted SRD method allows petrophysical parameters to be calculated from high- resolution seismic acoustic impedance. This means that quantitative petrophysical measurements can be obtained from borehole calibrated seismic data. Total integration between well and seismic data, will ensure that all steps leading to the final reservoir description volumes, are performed correctly and efficiently.