alexa Comparative Study on Oil Recovery Enhancement by WAG Injection Technique in a Fractured Oil Reservoir in the Southwest of Iran

Journal of Petroleum & Environmental Biotechnology
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Research Article

Comparative Study on Oil Recovery Enhancement by WAG Injection Technique in a Fractured Oil Reservoir in the Southwest of Iran

Hajnajafi Reza1*, Amid Arman2 and Hajnajafi Ghazal3
1Department of Petroleum Engineering, University of New South Wales, Sydney, Australia
2Department of Environmental Management HSE, Tehran North branch of Islamic Azad University, Tehran, Iran
3Department of Geology, University of Science and Research of Islamic azad university, Tehran, Iran
*Corresponding Author : Hajnajafi Reza
Department of Petroleum Engineering
University of New South Wales
Sydney, Australia
E-mail: [email protected]
Received: December 11, 2015 Accepted: January 13, 2016 Published: January 23, 2016
Citation: Reza H, Arman A, Ghazal H (2016) Comparative Study on Oil Recovery Enhancement by WAG Injection Technique in a Fractured Oil Reservoir in the Southwest of Iran. J Pet Environ Biotechnol 7:263. doi:10.4172/2157-7463.1000263
Copyright: © 2016 Reza H, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Water alternating gas injection (WAG) and simultaneous water and gas injection (SWAG) are injection techniques used to enhance oil recovery. Gas injection is today regarded as the second method for increasing oil recovery. While very little oil remains in the areas swept by gas, the amount of volumetric displacement by injected gas has always drawn much concern. This is due to high mobility ratio of the gas injected to reservoir oil. To solve this problem, WAG and SWAG injection techniques are used to control fluid flow profile. High microscopic displacement efficiency of gas (in whole scale) and high volumetric displacement efficiency of water (in microscopic scale) considerably increases oil recovery in the front space of water. In this paper, we investigate various WAG injection methods using Eclipse and compare the results to determine the best injection scenario for the reservoir under study.


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