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Geomechanics and Engineering Volume 18, Number 2, June10 2019 , pages 205-213 DOI: https://doi.org/10.12989/gae.2019.18.2.205 |
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Study on the distribution law and influencing factors of pressure field distribution before exploitation in heavy oilfield |
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Xing Zhang, Ting T. Jiang, Jian H. Zhang, Bo Li, Yu B. Li, Chun Y. Zhang, Bing B. Xu and Peng Qi
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| Abstract | ||
| A calculation model of reservoir pressure field distribution around multiple production wells in a heavy oil reservoir is established, which can overcome the unreasonable uniform-pressure value calculated by the traditional mathematical model in the multiwell mining areas. A calculating program is developed based on the deduced equations by using Visual Basic computer language. Based on the proposed mathematical model, the effects of drainage rate and formation permeability on the distribution of reservoir pressure are studied. Results show that the reservoir pressure drops most at the wellbore. The farther the distance away from the borehole, the sparser the isobaric lines distribute. Increasing drainage rate results in decreasing reservoir pressure and bottom-hole pressure, especially the latter. The permeability has a significant effect on bottom hole pressure. The study provides a reference basis for studying the dynamic pressure field distribution before thermal recovery technology in heavy oilfield and optimizing construction parameters. | ||
| Key Words | ||
| thermal recovery; reservoir pressure; stress sensitivity; exploitation; numerical simulation | ||
| Address | ||
| Xing Zhang: Research Institute of Petroleum Engineering Technology, Shengli Oilfield,SINOPEC, Xisan Road No. 306, Dongying, 257000, Shandong, People\'s Republic of China Ting T. Jiang, Jian H. Zhang, Yu B. Li, Chun Y. Zhang,Bing B. Xu and Peng Qi: Hubei Province Key Laboratory of Processing of Mineral Resources and Environment, School of Resource and Environmental Engineering, Wuhan University of Technology, Luoshi road No.122, Wuhan 430070, Hubei, People\'s Republic of China Bo Li: Key Laboratory Geotechnical Mechanics and Engineering of the Mechanics and Engineering of the Minister of Water Resources, Changjiang River Scientific Research Institute, Huangpu Road No.23, Wuhan, 430070, Hubei, People\'s Republic of China | ||