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Assessment ofl-WAG for Optimnm Recovery from a Heterogeneons Reservoir Offshore Terenggann, Malaysia.

Khairul Azmi, Muhammad Hafiz (2011) Assessment ofl-WAG for Optimnm Recovery from a Heterogeneons Reservoir Offshore Terenggann, Malaysia. Universiti Teknologi Petronas. (Unpublished)

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Abstract

\Vater alternating gas, \VAG seems to be the most practical EOR for Malaysian fields considering the abundance of C02 gas and the availability of treated seawater for injection. The injected seawater is used to increase the macroscopic displacement whereas the injected C02 gas is used to mobilize the residual oil to further enhance the sweep at microscopic level. The present study evaluates the influence of voidage replacement ratio (VRR) and WAG cycles to the incremental recovery factor. A dynamic model was developed by using Eclipse 100 to assess the incremental recovery from the implementation of WAG on a heterogeneous, non-apparent fluid contact oil reservoir offshore Terengganu. The study found that the predicted incremental recovery of 7% was insensitive to both VRR and WAG cycles. This incremental recovery was almost the same with the one obtained from the secondary recovery. This could be due to the complexity of the reservoir structure itself which requires further refinement on the locations of the injectors' perforation. Early gas breakthrough was observed in almost all simulated WAG cycles cases that ranged from 3 to 12 months and VRR cases that ranged from 50% to 150%. Therefore, the present study recommends WAG optimization involving assessment of the individual producing well performance.

Item Type: Final Year Project
Academic Subject : Academic Department - Petroleum Geosciences - Petroleum Engineering - Reservoir Engineering - EOR and IOR - Enhanced oil recovery
Subject: T Technology > T Technology (General)
Divisions: Geoscience and Petroleum Engineering
Depositing User: Users 2053 not found.
Date Deposited: 24 Sep 2013 15:56
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/6867

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