Sector Model Simulation of Water and Gas Injection Performance of Ilam Oil Reservoir (JOFIER Oilfield) in Compare with Natural Depletion

Document Type : Review Paper

Authors
Mohammad Beigi 1
Zahra Arab Aboosaadei 2, 2
1 Department of Chemical Engineering, Islamic Azad University, Marvdasht,, Iran,
2 Department of Chemical Engineering, Islamic Azad University, Marvdasht,, Iran
Abstract
In this study, a brief description of modeling process to reach the proposed scenarios, main results, conclusions and recommendations will be presented. WAG as an EOR method is being considered for Ilam reservoir, an onshore oilfield located in south- west Iran.
The reservoir is one with high amount of H2S and asphaltene. The only drive mechanism is Solution gas drive and it has no active aquifer, so although it had good flow potential. By using new reservoir management techniques and enhanced oil recovery in order to pressure maintenance, one can extract a lot more oil.
The scope of this project was to evaluate the impact of surface facilities, reserves and recovery factor by:

Natural deletion
Water injection
Gas injection
Water alternating gas

There are several wells in model and, if needed, it was possible to change function of production well to injector.
Sector model was run for different scenarios and realizations and the best EOR method was selected by considering the reservoir rock and fluid data and different injecting fluid composition and different injection pressure. After thorough studies and technical evaluations it was found that Gas injection was the best scenario, allowing longer plateau compared to Natural depletion and other scenarios.

Keywords

Subjects

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  • Receive Date 13 May 2018
  • Revise Date 25 May 2018
  • Accept Date 04 July 2018