特低渗储层不同渗流介质应力敏感特征及其评价方法研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (347 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要地层岩石的渗透率应力敏感特征对于地下油气资源开发、核废料地下处置等具有极为重要的影响。选取大庆油田外围特低渗油藏及长庆油田某露头储层砂岩岩石进行不同渗流介质(氮气、盐水、煤油)渗透率应力性试验，分析岩样渗透率、孔喉变形、流体压缩性及流固耦合作用机制等因素对应力敏感性的影响。试验结果表明，特低渗储层岩石不同渗流介质渗透率应力敏感性具有明显的差异，气测渗透率与束缚水状态下的油相有效渗透率在有效应力增加初期(2～16 MPa变化区间)急剧减小，但有效应力增加后期水测与油测渗透率仍具有较为明显的减小趋势。1×10－3 μm2是特低渗岩石气测与水测渗透率应力敏感性强弱对比发生变化的临界渗透率。有效应力作用下作为主要渗流通道的较大孔喉首先被压缩变形是导致渗透率在有效应力加载初期急剧减小的主要原因，不同渗流介质压缩性和流固耦合作用机制差异是导致气、液渗透率应力敏感性差异的主要原因。特低渗油藏储层应力敏感性评价中应以油相作为渗流介质进行评价试验。提出区分岩芯与油气储层2种不同的渗透率应力敏感性试验及其评价方法。在实际油藏储层有效应力变化范围内，特低渗储层渗透率应力敏感性较弱。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：流体力学, 特低渗储层, 渗透率应力敏感性, 渗流介质, 孔隙结构, 评价方法

Abstract：Understanding the permeability stress-sensitivity characteristics is vital for effective development of oil and gas reservoirs and nuclear waste underground disposal. Different types of fluid media(nitrogen，brine and kerosene) permeability stress-sensitivity have been comparatively studied in ultra-low permeability reservoir and outcrop sandstone rock samples obtained from Daqing oilfield and Changqing outcrop reservoir，respectively. Those factors including rock permeability，pore throat deformation fluid compressibility and fluid-solid coupling were also analyzed on the effect of permeability stress-sensitivity. The experimental results indicate that the magnitude of permeability stress-sensitivity of different types of fluid media is significantly different. Gas permeability and oil effective permeability at irreducible water saturation dramatically declined during the early increase of effective stress. The comparative results also suggest that water permeability stress-sensitivity is stronger than that of gas permeability when the rock gas permeability is larger than 1×10－3 μm2. But the gas permeability stress-sensitivity is stronger than that of water permeability when the rock gas permeability is less than 1×10－3 μm2. That the larger pore throats were firstly compressively deformed is the main factor causing the permeability dramatically decreased during the early increase of effective stress. Fluid compressibility and fluid-solid coupling differences among different types of fluid media cause different magnitudes of gas，water and oil permeability reduction. Oil phase should be used as the flow media in oil reservoir permeability stress-sensitivity evaluation. A clear distinction between rock core and petroleum reservoir permeability stress-sensitivity experiment and evaluation method were also proposed. The permeability stress-sensitivity of ultra-low permeability reservoir is weaker when the reservoir effective stress range is considered.

Key words： fluid mechanics ultra-low permeability reservoir permeability stress-sensitivity fluid media pore structure evaluation method

收稿日期: 2012-08-13

引用本文:

孙军昌1，杨正明1，2，刘学伟1，2，于荣泽2，冯骋1. 特低渗储层不同渗流介质应力敏感特征及其评价方法研究[J]. 岩石力学与工程学报, 2013, 32(2): 324-332.
SUN Junchang1，YANG Zhengming1，2，LIU Xuewei1，2，YU Rongze2，FENG Cheng1. STUDY OF PERMEABILITY STRESS-SENSITIVITY CHARACTERISTICS AND ITS EVALUATION METHOD OF ULTRA-LOW PERMEABILITY RESERVOIR USING DIFFERENT TYPES OF FLUID MEDIA. , 2013, 32(2): 324-332.

链接本文:

http://www.rockmech.org/CN/Y2013/V32/I2/324

[1]	FATT I，DAVIS D H. Reduction in permeability with overburden pressure[J]. Journal of Petroleum Technology，1952，4(12)：16. " target="_blank">
[3]	LORENZ J C. Stress-sensitive reservoirs[J]. Journal of Petroleum Technology，1999，51(1)：61-63. " target="_blank">
[4]	刘建军，刘先贵，胡雅礽，等. 低渗透储层流-固耦合渗流规律的研究[J]. 岩石力学与工程学报，2002，21(1)：88-92.(LIU Jianjun，LIU Xiangui，HU Yareng，et al. Study of fluid-solid coupling flow in low permeability oil reservoir[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(1)：88-92.(in Chinese))
[6]	董平川，江同文，唐明龙. 异常高压气藏应力敏感性研究[J]. 岩石力学与工程学报，2008，27(10)：2 087-2 092.(DONG Pingchuan，JIANG Tongwen，TANG Minglong. Research on stress-sensitivity in abnormal high pressure gas reservoir[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(10)：2 087-2 092.(in Chinese)) " target="_blank">
[14]	常宗旭，赵阳升，胡耀青，等. 裂隙岩体渗流与三维应力耦合的理论与试验研究[J]. 岩石力学与工程学报，2004，23(增2)：4 907-4 911.(CHANG Zongxu，ZHAO Yangsheng，HU Yaoqing，et al. Theoretic and experimental studies of the coupling of seepage flow and 3D stress in fractured rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(Supp.2)：4 907-4 911.(in Chinese)) " target="_blank">
[17]	徐轩，刘学伟，杨正明，等. 特低渗透砂岩大型露头模型单相渗流特征试验[J]. 石油学报，2012，33(3)：453-458.(XU Xuan，LIU Xuewei，YANG Zhengming，et al. An experimental study on single-phase seepage characteristics with a large-scale model made of ultra-low permeability sandstone outcrops[J]. Acta Petrolei Sinica， 2012，33(3)：453-458.(in Chinese)) " target="_blank">
[8]	HOLT R M，BRIGNOLI M，KENTER C J. Core quality：quantification of coring-induced rock alteration[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(6)：889-907. " target="_blank">
[11]	WANG S，ELSWORTH D. Permeability evolution in fractured anthracite：the roles of crack geometry and water-content[C]// Proceedings of the 45th U. S. Rock Mechanics Geomechanics Symposium. Fraccisco，USA：[s. n.]，2011：4-11. " target="_blank">
[13]	高建，吕静，王家禄. 储层条件下低渗透岩石应力敏感评价[J]. 岩石力学与工程学报，2009，28(增2)：3 899-3 902.(GAO Jian，LU Jing，WANG Jialu. Evaluation on stress sensibility of low permeability rock under reservoir condition[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.2)：3 899-3 902.(in Chinese)) " target="_blank">
[15]	李传亮. 低渗透储层不存在强应力敏感[J]. 石油钻采工艺，2005，27(4)：61-63.(LI Chuanliang. Low permeability rocks are less sensitive to stress[J]. Oil Drilling and Production Technology，2005，27(4)：61-63.(in Chinese)) " target="_blank">
[16]	罗瑞兰，程林松，彭建春，等. 确定低渗岩芯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.(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：Natural Science，2007，31(2)：87-90. (in Chinese)) " target="_blank">
[18]	杨正明，张英芝，郝明强，等. 低渗透油田储层综合评价方法[J]. 石油学报，2006，27(2)：64-67.(YANG Zhengming，ZHANG Yingzhi， HAO Mingqiang，et al. Comprehensive evaluation of reservoir in low-permeability oilfields[J]. Acta Petrolei Sinica，2006，27(2)：64-67.(in Chinese)) " target="_blank">
[19]	CHEN Q，YE C，KINZELBACH W，et al. Variations of permeability and pore size distribution of porous media with pressure[J]. Journal of Environmental Quality，2002，31(2)：500-505. " target="_blank">
[21]	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.(LUO Ruilan，FENG Jinde，TANG Minglong，et al. Probe into evaluation methods for stress sensitivity of low permeability reservoirs[J]. Journal of Southwest Petroleum University：Science and Technology， 2008，30(5)：161-164.(in chinese))
[2]	DAVIES J，DAVIES D. Stress-dependent permeability：characterization and modeling[J]. Society of Petroleum Engineer Journal，2001，6(2)：224-235. " target="_blank">
[5]	焦春艳，何顺利，谢全，等. 超低渗透砂岩储层应力敏感性试验[J]. 石油学报，2011，32(3)：489-494.(JIAO Chunyan，HE Shunli，XIE Quan，et al. An experimental study on stress-dependent sensitivity of ultra-low permeability sandstone reservoirs[J]. Acta Petrolei Sinica，2011，32(3)：489-494.(in Chinese)) " target="_blank">
[20]	SINCOCK K，WILLIAMS J. On the effect of reservoir confining stress on mercury intrusion-derived pore frequency distribution[C]// International Symposium of the Society of Core Analysts. Pau，France：[s. n.]，2003：1-15. " target="_blank">
[7]	贺玉龙，杨立中. 围压升降过程中岩体渗透率变化特性的试验研究[J]. 岩石力学与工程学报，2004，23(3)：415-419.(HE Yulong，YANG Lizhong. Testing study on variational characteristics of rockmass permeability under loading-unloading of confining pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(3)：415-419.(in Chinese))
[9]	李传亮. 储层岩石的应力敏感性评价方法[J]. 大庆石油地质与开发，2006，25(1)：40-42.(LI Chuanliang. Evaluation method for stress sensitivity of reservoir rock[J]. Petroleum Geology and Oil Field Development in Daqing，2006，25(1)：40-42.(in Chinese)) " target="_blank">
[12]	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)：95-98.(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)：95-98.(in Chinese)) " target="_blank">
[10]	盛金昌，李凤滨，姚德生，等. 渗流-应力-化学耦合作用下岩石裂隙渗透特性试验研究[J]. 岩石力学与工程学报，2012，31(5)： 1 016-1 025.(SHENG Jinchang，LI Fengbin，YAO Desheng，et al. Experimental study of seepage properties in rocks fracture under coupled hydro-mechano-chemical process[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(5)：1 016-1 025.(in Chinese)) " target="_blank">