Research Article | OPEN ACCESS
An Analysis Method of Gas Injection Development Effect in the Single well Fractured-Vuggy System
1Baohua Chang, 1, 3Wei Xiong, 2Daiyu Zhou, 1, 3Shusheng Gao, 2Xingliang Deng and 2Junfeng Liu
1Institute of Porous Fluid Mechanics Chinese Academy of Sciences, Langfang, Hebei 065007
2Exploration and Development Research Institute of Tarim Oilfield Company
Kuerle Xinjiang 841000
3Institute of Petroleum Exploration and Development Petro China, Langfang, Hebei 065007
Research Journal of Applied Sciences, Engineering and Technology 2013 19:4615-4618
Received: September 07, 2012 | Accepted: October 25, 2012 | Published: May 10, 2013
Abstract
In this study, we propose an analysis method of gas injection development effect in the single well fractured-vuggy system. The fractured-vuggy reservoir has a complex spatial structure, oil-water relations and connectivity, of which single well fractured-vuggy system is a simpler model. Aiming at the problems of low recovery rate and production difficulties, based on the elasticity theory and fluid mechanics in porous, the elastic expansion energy and oil-water interface change before and after gas injection in the single well developing fractured-vuggy system are analyzed. And a theoretical mode of development effect after gas injection is built. Then an example analysis of Tarim Oilfield is conducted. The results show that: mining after repeated gas injection, water cut significantly decreased, yield and water free production increases gradually and the replacement rate increases with the gas injection. This shows that gas injection can effectively inhibit the rise of oil-water interface and improve the development effect of fractured-vuggy system.
Keywords:
Cave, effect, fracture-vuggy, gas injection, recovery,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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