Pre and Post Simulation
of Shagar
Reservoir
in North Geisum Field, Egypt
By
Ali Mohamed Taha1
(1) Geisum Oil Company, N/A, Egypt
North Geisum is located in the southern entrance of the Gulf of Suez, Egypt.
The field started oil production in April, 1995. One year after, peripheral two
water flooding injectors were implemented in the field. A Two - phase integrated
reservoir
study
was performed on the two main sand reservoirs (Shagar and Rahmi).
The first phase was basically intended to understand the different complications
in both characteristics and performance of each
reservoir
. In this pre-modeling
phase, all conventionally known
reservoir
engineering approaches were applied,
including the pressure and production performance calculations (material
balance), aquifer strength, and decline curve analysis.
In the simulation
phase, a geostatical technique to integrate the 2D seismic
data, geological interpretation, petrography, and log data were used and a
representative model was eventually developed.
Another technique was applied via the hydraulic zonation (FZI) in order to
define the distinct zones with similar fluid flow characteristics within the
reservoir
and to predict the permeability in the uncored wells. This is based on
core analysis and application of a methodology developed by Jude Amaefule and
others.
This paper addresses the importance of applying the classical reservoir
engineering approaches/techniques before performing the costly full field
reservoir
simulation
work.