New insights and discussions on stress sensitivity of fractured tight reservoir

Expand
  • 1.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;
    2.Key Laboratory of Petroleum Engineering of the Ministry of Education,China University of Petroleum,Beijing 102249;
    3.No.1 Oil Production Plant,Dagang Oilfield Company,PetroChina,Tianjin 300280,China;
    4.CNPC Key Laboratory of Geophysical Exploration,China University of Petroleum,Beijing 102249,China

Received date: 2015-09-10

  Revised date: 2015-10-28

  Online published: 2019-09-20

Abstract

The current insights in the applicability of stress dependent permeability and mathematical model to fracture tight reservoirs are still a controversial issue.In this paper,based on the physical meaning of Walsh model,the mathematical relationship between Walsh model and power law formula was investigated and the physical meaning of power law coefficient was analyzed and elaborated,and then the stress sensitivity tests on rock samples were conducted.Finally,the applicability of stress dependent permeability formulas was classified according to five pore types.The results show that the best regression fitting occurred in fractured tight reservoir rather than high porosity/permeability reservoir or no crack reservoir using Walsh model.Considering fracture roughness,Walsh model and power law formula are mathematically equivalent.The power law coefficient is the product of fracture “aperture term” and “tortuosity term”.The strong stress sensitivity corresponds to high fracture roughness and tortuosity.Consequently,classification result show that power law formula apply to fractured tight reservoir and microcrack reservoir,exponential formula apply to high porosity/permeability reservoir or no crack reservoir.

Cite this article

Zhang Rui, Ning Zheng-fu, Zhang Hai-shan, Xie Qian . New insights and discussions on stress sensitivity of fractured tight reservoir[J]. Natural Gas Geoscience, 2016 , 27(5) : 918 -923 . DOI: 10.11764/j.issn.1672-1926.2016.05.0918

References

[1]Xu Hongjun,Fan Mingguo,Kang Zheng,et al.A productivity prediction equation considering rock permeability stress-sensitivity in low-permeability gas reservoirs[J].Natural Gas Geoscience,2008,19(1):145-147.[胥洪俊,范明国,康征,等.考虑渗透率应力敏感的低渗气藏产能预测公式[J].天然气地球科学,2008,19(1):145-147.]
[2]Ai Shuang,Cheng Linsong,Huang Shijun,et al.Transient production forecasting model of multiply fractured horizontal wells in shale gas reservoirs[J].Natural Gas Geoscience,2014,25(10):1661-1667.[艾爽,程林松,黄世军,等.页岩气体积压裂水平井非稳态产能评价模型[J].天然气地球科学,2014,25(10):1661-1667.]
[3]Jones F O.A laboratory study of the effects of confining pressure on fracture flow and storage capacity in carbonate rocks[J].Journal of Petroleum Technolog,1975,27(1):21-27.
[4]Walsh J B.Effect of pore pressure and confining pressure on fracture permeability()[J].International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1981,18(5):429-435.
[5]Gangi A.Variation of whole and fractured porous rock permeability with confining pressure[J].International Journal of Rock Mechanics and Mining Sciences& Geomechanics Abstracts,1978,15(5):249-257.
[6]McKee C R,Bumb A C,Koenig R A.Stress-dependent permeability and porosity of coal and other geologic formations[J].SPE Formation Evaluation,1988,3(1):81-91.
[7]Dong J J,Hsu J Y,Wu W J,et al.Stress-dependence of the permeability and porosity of sandstone and shale from TCDP Hole-A[J].International Journal of Rock Mechanics and Mining Sciences,2010,47(7):1141-1157.
[8]Ruan Min,Wang Liangang.Low-permeability oilfield development and pressure-sensitive effect[J].Acta Petrolei Sinica,2002,23(3):73-76.[阮敏,王连刚.低渗透油田开发与压敏效应[J],石油学报,2002,23(3):73-76.]
[9]Luo Ruilan,Cheng Linsong,Li Xizhe,et al.The deformation characteristics of low permeability reservoir rocks under confining pressure[J].Natural Gas Industry,2009,29(9):46-49.[罗瑞兰,程林松,李熙喆,等.低渗透储层岩石覆压实验变形特征分析[J].天然气工业,2009,29(9):46-49.]
[10]Luo Ruilan,Feng Jinde,Tang Minglong,et al.probe into evaluation methods for stress sensitivity of low permeability reservoir[J].Journal of Southwest Petroleum University:Science& Technology Edition,2008,30(5):161-164.[罗瑞兰,冯金德,唐明龙,等.低渗储层应力敏感评价方法探讨[J].西南石油大学学报:自然科学版,2008,30(5):161-164.]
[11]Luo Ruilan,Cheng Linsong,Peng Jianchun,et al.A new method of determining relationship between permeability and effective overburden pressure for low-permeability reservoirs[J].Journal of China University of Petroleum:Science& Technology Edition,2007,31(2):87-90.[罗瑞兰,程林松,彭建春,等.确定低渗岩心渗透率随有效覆压变化关系的新方法[J].中国石油大学学报:自然科学版,2007,31(2):87-90.]
[12]Yang Zhaopeng,Gao Shusheng,Guo Lihui,et al.Effect of stress sensitivity on well productivity in tight gas reservoir[J].Drilling & Production Technology,2013,36(2):58-61.[杨朝蓬,高树生,郭立辉,等.致密砂岩气藏应力敏感性及其对产能的影响[J].钻采工艺,2013,36(2):58-61.]
[13]Wen Weiming,Zhu Shaopeng,Li Mao.Stress sensitivity features and productivity equations of offshore abnormal high-pressure gas reservoirs:A case study from the Yinggehai Basin[J].Natural Gas Industry,2014,34(9):59-63.[温伟明,朱绍鹏,李茂.海上异常高压气藏应力敏感特征及产能方程——以莺歌海盆地为例[J].天然气工业,2014,34(9):59-63.]
[14]Kassis S M,Sondergeld C H.Gas Shale Permeability: Effects of Roughness,Proppant,Fracture Offset,and Confining Pressure[C].International Oil and Gas Conference and Exhibition in China,8-10 June,Beijing,China.SPE131376.2010.
[15]Xue Yongchao,Cheng Linsong.Experimental comparison study on stress sensitivity of different permeability cores[J].Oil Drilling & Production Technology,2011,33(3):38-41.[薛永超,程林松.不同级别渗透率岩心应力敏感实验对比研究[J].石油钻采工艺,2011,33(3):38-41.]
[16]Wang Liqiang,Liu Huiqing,Zhen Siguang,et al.Quantitative research on stress sensitivity of low-permeability reservoir[J].Acta Petrolei Sinica,2009,30(1):96-99.[王厉强,刘慧卿,甄思广,等.低渗透储层应力敏感性定量解释研究[J].石油学报,2009,30(1):96-99.]
[17]Bernabe Y.The effective pressure law for permeability in Chelmsford granite and Barre granite[J].International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1986,23(3): 267-275.
[18]Wang Yang,Xu Wei,Li He,et al.Production performance of T1j2 gas reservoir in Moxi Gasfield[J].Natural Gas Industry,2007,27(9):71-74.[王阳,徐伟,李和,等.磨溪气田嘉二段气藏产能特征[J].天然气工业,2007,27(9):71-74.]
[19]Qin Jishun,Li Aifen.Petro-Physics[M].Dongying: China University of Petroleum Press,2003.[秦积舜,李爱芬.油层物理学[M].东营:中国石油大学出版社,2003.]

Outlines

/