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AAPG Bulletin, Vol. 90 (2006), Program Abstracts (Digital)

7th Middle East Geosciences Conference and Exhibition
Manama, Bahrain
March 27-29, 2006

ABSTRACT: Modeling a Fractured Reservoir for a Brown Previous HitFieldNext Hit by Integrating Geologic and Production Previous HitDataNext Hit

I. Fahmy1, Y.Z. Ma2, F. Allam1, E. Gomez2, S. Yousef1, S. Bustami1, A. Zeina3, A. Ali3, H. Nassar3
1 Schlumberger Logelco, Egypt. DCS-CS
2 Schlumberger DCS Denver
3 General Petroleum Company (GPC)

Ras Gharib Previous HitfieldNext Hit, located in the Gulf of Suez, Egypt, is a structurally complex Previous HitfieldNext Hit with a large number of faults and complex stratigraphy. Ras Gharib Previous HitfieldNext Hit has been producing since 1930s. The Previous HitfieldNext Hit operator has realized the need for a reservoir model to predict reservoir performance so as to optimize the recovery of the remaining reserve. Previously only limited reservoir characterization was performed, and the reservoir models that were built were unable to match the Previous HitfieldNext Hit production Previous HitdataNext Hit despite significant modifications of petrophysical properties of the models. The Previous HitfieldNext Hit development plans couldn’t confidently rely on these models, as they didn’t have an adequate history match to the production Previous HitdataNext Hit.

The factors that negatively affected the previous models were first screened. For Previous HitexampleNext Hit, it was realized that the main producing unit of the reservoir is highly fractured, and the fact that no fracture property was modeled in the previous models significantly affected the mismatch to the production history Previous HitdataNext Hit. A new modeling workflow was developed to improve the fracture characterization of the reservoir with limited Previous HitdataNext Hit. Faults were identified and faulting-induced fractures were inferred from the fault patterns in the Previous HitfieldNext Hit. The descriptive faultpatterns were further quantified and validated using the production Previous HitdataNext Hit. Because no image logs were available, production logs were used as feedback to model the fracture properties. As drilling mud losses were recorded as a qualitative indicator, a quantitative methodology based on an enhanced geostatistical technique was developed to integrate them with the production Previous HitdataNext Hit and faulting-induced fracture properties.

As a result of using a highly integrated modeling workflow that incorporates the fracture characterization and property modeling, the reservoir model has shown very good early history match to the Previous HitfieldNext Hit production Previous HitdataNext Hit. This has helped determining the remaining reserves, and is to be used for the next phase development planning of the Previous HitfieldTop.


Copyright © 2006. The American Association of Petroleum Geologists. All Rights Reserved.