Productivity Prediction Model of Shale Gas Considering Stress Sensitivity

DENG Jia，ZHU Wei-yao，LIU Jin-xia，ZHANG Zhen，MA Qian，ZHANG Meng，DENG Kai，MA Li

doi:10.11764/j.issn.1672-1926.2013.03.456

Natural Gas Geoscience >

2013 , Vol. 24 >Issue 3: 456 - 460

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.03.456

Productivity Prediction Model of Shale Gas Considering Stress Sensitivity

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1.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China; 2.Well Logging Technology Center,CNPC Greatwall Drilling and Exploration Engineering Company,Beijing 100176, China;3.Engineering Department,CNOOC Hainan Gas Co.Ltd.,Yangpu 578101,China;4.Offshore Oil Engineering(Zhuhai) Co.Ltd.,Zhuhai 519055,China;5.Oil Refinery of Huabei Oilfield,Renqiu 062552,China

Received date: 2012-09-04

Revised date: 2013-01-09

Online published: 2013-06-10

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Abstract

According to the gas accumulation mechanism and flow mechanism of shale gas reservoir,a mathematical model of shale gas productivity prediction was established,considering the effect of desorption,diffusion and seepage flow in shale gas reservoir.The pressure distribution and productivity equation were obtained by solving the controlling equation under different boundary conditions.The results show that,the more the desorption quantity is,the slower the formation pressure decrease.The production and the pressure square difference are linearly correlated.The productivity prediction model considering stress sensitivity was solved with new pseudo-pressure function.Production decreases with the increase of stress sensitivity of shale gas reservoir,which guide that controlling the pressure difference reasonably is able to protect the reservoir from damage.The productivity prediction model in this paper provides a theoretical foundation for shale gas reservoir evaluation and development design.

Key words： Shale gas; Desorption; Productivity prediction; Mathematical model; Stress sensitivity

Cite this article

DENG Jia，ZHU Wei-yao，LIU Jin-xia，ZHANG Zhen，MA Qian，ZHANG Meng，DENG Kai，MA Li . Productivity Prediction Model of Shale Gas Considering Stress Sensitivity[J]. Natural Gas Geoscience, 2013 , 24(3) : 456 -460 . DOI: 10.11764/j.issn.1672-1926.2013.03.456

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