低渗透储层应力敏感性及其对石油开发的影响

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Abstract To deeply research the stress sensitivity of low permeability reservoir，the strong stress sensibility of low permeability reservoir is theoretically proved based on the capillary bundle model with varying diameters. The effects of effective stress，pore structure，stress loading mode on permeability are studied by laboratory experiments with varying fluid pressures，while keeping confining pressure steady. The effects of stress sensitivity on oilfield development under different formation conditions are studied by numerical simulation. The results show that：The effect of stress variation on porosity is very small，but its influence on permeability is very large. Comparing with high permeability reservoir，stress sensitivity of low permeability reservoir is stronger. Stress sensitivity is closely relative to effective stress，pore structure and stress loading mode. The stress sensitivity increases as the permeability decreases，the effective stress and the stress loading velocity increase. There exists permanent damage on permeability while the effective stress reduces，and the permeability cannot recover to the initial value. The producing pressure drop of the production well has a good exponential relationship with stress sensitive coefficient. The stronger the reservoir′s heterogeneity is and the lower the average permeability is，the larger the stress sensitivity is，and thus its effect on oil production is larger. However，the effect of rhythmicity on stress sensitivity is small. These results have guidance to develop low permeability reservoir reasonably.

Key words： rock mechanics low permeability reservoir stress sensitivity capillary bundle model laboratory experiment producing pressure drop heterogeneity

Received: 10 May 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/IS1/2697

[1] FATT I，DAVIS D H. Reduction in permeability with overburden pressure[J]. Petroleum Transactions，1952，4(12)：34–41. [2] 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. [3] DAVIES J P，DAVIES D K，DAVID K. Stress dependent permeability：characterization and modeling[C]// Proceedings of SPE Annual Technical Conference and Exhibition. Houston：[s.n.]，1999：224–235. [4] 杨锐华. 压力对低渗透岩芯渗透率测试的影响[J]. 钻采工艺，2003，26(4)：77–79.(YANG Ruihua. Effect of the pressure on the measuring of core permeability in low permeability reservoir[J]. Drilling and Production Technology，2003，26(4)：77–79.(in Chinese)) [5] MIN K，RUTQVIST J，TSANG C. Stress dependent permeability of fractured rock masses：a numerical study[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(7)：1 191–1 210. [6] ISCAN A G，KOK M V，BAGC A S. Estimation of permeability and rock mechanical properties of limestone reservoir rocks under stress conditions by strain gauge[J]. Journal of Petroleum Science and Engineering，2006，53(1)：13–24. [7] 黄远智，王恩志. 低渗透岩石渗透率对有效应力敏感系数的试验研究[J]. 岩石力学与工程学报，2007，26(2)：410–414.(HUANG Yuanzhi，WANG Enzhi. Experimental study on coefficient of sensitiveness between percolation rate and effective pressure for low permeability rock[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(2)：410–414.(in Chinese)) [8] 李闵，肖文联. 低渗砂岩储层渗透率有效应力定律试验研究[J]. 岩石力学与工程学报，2008，27(增2)：3 535–3 540.(LI Min，XIAO Wenlian. Experimental study on permeability effective stress law in low permeability sandstone reservoir[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 535–3 540.(in Chinese)) [9] 庞义辉，张勇. 三维应力下岩石渗透率试验研究[J]. 采矿与安全工程学报，2009，26(3)：367–371.(PANG Yihui，ZHANG Yong. Experimental study of rock permeability under triaxial compression[J]. Journal of Mining and Safety Engineering，2009，26(3)：367–371.(in Chinese)) [10] 程远方，智勤功，赵益忠，等. 应力敏感油藏压裂井产量动态规律研究[J]. 应用基础与工程科学学报，2010，18(2)：291–298.(CHENG Yuanfang，ZHI Qingong，ZHAO Yizhong，et al. The research on stress sensitive reservoir fracture well production dynamic rule[J]. Journal of Basic Science and Engineering，2010，18(2)：291–298.(in Chinese)) [11] 于忠良，熊伟，高树生，等. 致密储层应力敏感性及其对油田开发的影响[J]. 石油学报，2007，28(4)：96–98.(YU Zhongliang，XIONG Wei，GAO Shusheng，et al. Stress sensitivity of tight reservoir and its influence on oilfield development[J]. Acta Petrolei Sinica，2007，28(4)：96–98.(in Chinese)) [12] 王瑞飞，沈平平，宋子齐，等. 特低渗透砂岩油藏储层微观孔喉特征[J]. 石油学报，2009，30(4)：560–563.(WANG Ruifei，SHEN Pingping，SONG Ziqi，et al. Characteristic of micro-pore throat in ultra-low permeability sandstone reservoir[J]. Acta Petrolei Sinica，2009，30(4)：560–563.(in Chinese)) [13] JONES S C. Two-point determinations of permeability and PV vs. net confining stress[J]. SPE Formation Evaluation，1988，3(1)：235–241. [14] 刘建军，刘先贵. 有效压力对低渗透多孔介质孔隙度、渗透率的影响[J]. 地质力学学报，2001，7(1)：41–44.(LIU Jianjun，LIU Xiangui. The effect of effective pressure on porosity and permeability of low permeability porous media[J]. Journal of Geomechanics，2001，7(1)：41–44.(in Chinese)) [15] 石玉江，孙小平. 长庆致密碎屑岩储集层应力敏感分析[J]. 石油勘探与开发，2001，28(5)：85–87.(SHI Yujiang，SUN Xiaoping. Stress sensitivity analysis of Changqing tight classic reservoir[J]. Petroleum Exploration and Development，2001，28(5)：85–87.(in Chinese)) [16] 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)：96–100.(WANG Liqiang，LIU Huiqing，ZHEN Siguang，et al. Quantitative research on stress sensitivity of low-permeability reservoir[J]. Acta Petrolei Sinica，2009，30(1)：96–100.(in Chinese)) [17] 代平，孙良田，李闽. 低渗透砂岩储层孔隙度、渗透率与有效应力关系研究[J]. 天然气工业，2006，26(2)：93–95.(DAI Ping，SUN Liangtian，LI Min. Study on relation between porosity/ permeability and effective stress of sand reservoir with low permeability[J]. Natural Gas Industry，2006，26(2)：93–95.(in Chinese)) [18] 王增林，刘慧卿，王励强. 精细油藏数值模拟中非均质性的表征技术[J]. 西安石油大学学报：自然科学版，2004，19(3)：13–16. (WANG Zenglin，LIU Huiqing，WANG Liqiang. Characterization techniques of reservoir heterogeneity in fine reservoir numerical simulation[J]. Journal of Xi?an Shiyou University：Natural Science，2004，19(3)：13–16.(in Chinese))