Integration of Core, Log, and
Petrographic Data For Petrophysical Analysis of The Nubia Sandstone Reservoir
,
October Field, Gulf Of Suez
By
Gamal Ragab Gaafar1, Mahmoud Youssery Zein El-Din2
(1) GUPCO, Cairo, Egypt (2) Al-Azhar University, Cairo, Egypt
A detailed geological and petrophysical study of the Nubia sandstone
reservoir
in October Oil Field has been made to interpret the
reservoir
heterogeneity and factors affecting
reservoir
damage. Using a computer processed
log analysis program, the
reservoir
has been subdivided into six zones based on
the shale content, porosity, and permeability variations. A continuous shale
beds have been identified throughout the drilled section, which probably act as
a barrier to the vertical flow of the fluids through the
reservoir
.
The constructed reservoir
geology model shows that the water encroachment can
be explained as edge water
drive
, and is controlled by the continuous shale
beds, which prevent the vertical fluid flow.
The factors affecting reservoir
damage and variation in the petrophysical
characteristics of the
reservoir
should determine programs for efficient water
flooding which may increase the maximum oil recovery.