A Comprehensive Seepage Model of Shale Gas Reservoir and Pressure Behavior Analysis

Expand
  • College of Petroleum Engineering,China University of Petroleum,Qingdao 266580,China

Received date: 2013-07-17

  Revised date: 2013-09-24

  Online published: 2014-04-10

Abstract

Different from conventional gas reservoir,shale reservoir′s seepage mechanism is controlled by adsorption,diffusion,cross flow and Dracy flow,and consequently its seepage mechanism is very complicated.In this paper,desorption is taken into consideration.Considering the existence of pressure difference,except for diffusion,cross flow is introduced.In order to describe diffusion and cross flow respectively,two new parameters are introduced respectively to represent influences of the two factors.Then a comprehensive model for multi-stage fractured horizontal wells in shale gas reservoirs has been built.And on this basis,by means of the modified Lord Kelvin point source function and principle of superposition the expression of the solution has been obtained.Using Laplace inversion and Stehfest integral transformation,the bottomhole pressure of multi-stage fractured horizontal wells can be calculated,and the typical pressure curve and the contrast of the new and old mathematical model can be obtained,which can provide theoretical references for shale reservoir′s well testing and transient production evaluation.

Cite this article

DU Dian-fa,WANG Yan-yan,ZHANG Qiong,QIAO Ni,LIU Yang . A Comprehensive Seepage Model of Shale Gas Reservoir and Pressure Behavior Analysis[J]. Natural Gas Geoscience, 2014 , 25(4) : 612 -617 . DOI: 10.11764/j.issn.1672-1926.2014.04.612

References

[1]Liu Qingquan,Wang Xinhai,Yin Hu,et al.Simulation of shale-gas reservoirs and dynamic analysis of bottom hole pressure[J].Journal of Northeast Petroleum University,2013,37(1):91-96.[李清泉,王新海,尹虎,等.页岩气藏数值模拟及井底压力动态分析[J].东北石油大学学报,2013,37(1):91-96.]

[2]]Cheng Yuanfang,Dong Bingxiang,Shi Xian,et al.Seepage mechanism of a triple-porosiy/dual permeability model for shale gas reservoirs[J].Natural Gas Industry,2012,32.(9):44-47.[程远方,董丙响,时贤,等.页岩气藏三孔双渗模型的渗流机理[J].天然气工业,2012,32(9): 44-47.]

[3]Duan Yonggang,Wei Mingqiang,Li Jianqiu,et al.Shale gas seepage mechanism and fractured wells′ production evaluation[J].Journal of Chongqing University,2011,34(4):62-66.[段永刚,魏明强,李建秋,等.页岩气藏渗流机理及压裂井产能评价[J].重庆大学学报,2011,34(4):62-66.]

[4]Wang Xiang,Liu Yuhua,Zhang Min,et al.Condition of formation and accumulation for shale gas[J].Natural Gas Geoscience,2010,21(2):350-356.[王祥,刘玉华,张敏,等.页岩气形成条件及成藏影响因素研究[J].天然气地球科学,2010,21(2):350-356.]

[5]Wang Weifeng,Liu Peng,Chen Chen,et al.The study of shale gas reservoir theory and resources evaluation[J].Natural Gas Geoscience,2013,24(3):429-438.[王伟锋,刘鹏,陈晨,等.页岩气成藏理论及资源评价方法[J].天然气地球科学,2013,24(3):429-438.]

[6]Wei Mingqiang,Duan Yonggang,Fang Quantang,et al.Current research situation of porosity & permeability characteristics and seepage mechanism of shale gas reservoir[J].Reservoir Evaluation and Development,2011,1(4):73-77.[魏明强,段永刚,方全堂,等.页岩气藏孔渗结构特征和渗流机理研究现状[J].油气藏评价与开发,2011,1(4):73-77.]

[7]Deng Jia,Zhu Weiyao,Liu Jinxia,et al.A new method of preducting gas wells′ productivity of fractured horizontal well of fractured horizontal well of low-permeability tight gas reservoir[J].Natural Gas Geoscience,2013,24(3):456-460.[邓佳,朱维耀,刘锦霞,等.考虑应力敏感性的页岩气产能预测模型[J].天然气地球科,2013,24(3):456-460.]

[8]Zheng Junwei,Sun Deqiang,Li Xiaoyan,et al.Shale gas technical progress of exploration and development[J].Natural Gas Geoscience,2011,22(3): 511-517.[郑军卫,孙德强,李小燕,等.页岩气勘探开发技术进展[J].天然气地球科学,2011,22(3):511-517.]

[9]Guo Jingjing,Zhang Liehui,Wang Haitao,et al.Pressure transient analysis for multi-stage fractured horizontal wells in shale gas reservoirs[J].Transport in Porous Media,2012,93(3):635-653.

[10]Guan Fujia,Wu Enjiang,Qiu Zhengke,et al.Effect of shale gas flow mechanism on development of gas reservoir[J].Petroleum Geology and Oilfield Development in Daqing,2011,30(2):80-83.[关富佳,吴恩江,邱争科,等.页岩气渗流机理对气藏开采影响[J].大庆石油地质与开发,2011,30(2):80-83]

[11]Brown M,Ozkan E,Raghavan R,et al.Practical solutions for pressure transient responses of fractured horizontal wells in unconventional reservoirs[C]//SPE Annual Technical Conference and Exhibition,4-7 October,New Orleans,Louisiana.SPE125043.Richardson,Texas: Society of Petroleum Engineers,2009:1-18.

[12]Tong Dengke,Chen Qinlei.Some annotation about Stehfest method of Laplace numerical inversion[J].Acta Petrolei Sinica,2001,22(6):91-92.[同登科,陈钦雷.关于Laplace数值反演Stehfest方法的一点注记[J].石油学报,2001,22(6):91-92.]

Outlines

/