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.