Influence of Fluid Damage on Shale Reservoir Stress Sensitivity
Received date: 2011-05-06
Revised date: 2011-07-15
Online published: 2011-10-10
Unconventional oil and gas resources are playing an increasingly important role.Shale gas has become a hot spot and frontier in current research due to huge resources and successful exploitation in the United States.Since shale reservoir is rich in clay mineral,the damages of fluid sensitivity and stress sensitivity are two important damage factors.The coupling action of two damages will greatly decrease the permeability of reservoir and restrict the engineering effect on developing shale gas.Based on fluid sensitivity of clay shale reservoir,we carried out the stress sensitivity,in comparison with difference of stress sensitivity before and after fluid damage.The results show that the stress sensitivity coefficients after fluid damage increase by 30% for the three type reservoirs with medium-strong degree water sensitivity,strong degree alkali sensitivity and medium-strong degree acid sensitivity,indicating the strong stress sensitive degree.The discrete migration of clay mineral particle,hydrate expansion,fluid lubrication cause the decrease of rock strength,make the seepage channel become narrow,and increase the stress sensitivity damage.Therefore,it is a special significance for the protection and economic development of gas shale reservoir to reduce the invasion of incompatible fluid in the well operation.
Key words： Shale; Fluid sensitivity; Stress sensitivity; Clay minerals; Fracture.
HE Jin-Gang, KANG Yi-Li, YOU Li-Jun, CHENG Qiu-Ju . Influence of Fluid Damage on Shale Reservoir Stress Sensitivity[J]. Natural Gas Geoscience, 2011 , 22(5) : 915 -919 . DOI: 10.11764/j.issn.1672-1926.2011.05.915
［1］Jenkins D.Coalbed and shale gas reservoirs［J］.Journal of Petroleum Technology,2008,24(2):92-99.
［2］Zhang Jinchuan,Xu Bo,Nie Haikuan,et al.Exploration potential of shale gas resources in China［J］.Natural Gas Industy,2008,28(6):136-140.［张金川,徐波,聂海宽,等.中国页岩气资源勘探潜力［J］.天然气工业,2008,28(6):136-140.］
［3］Li Jianzhong,Dong Dazhong,Chen Gengsheng,et al.Prospects and strategic position of shale gas resources in China［J］.Natural Gas Industy,2009,29(5):11-16.［李建忠,董大忠,陈更生,等.中国页岩气资源前景与战略地位［J］.天然气工业,2009,29(5):11-16.］
［4］Wang Xiuli,Wang Tianjiao.The Shale Gas Potential of China［R］.SPE142304,2011.
［5］Sutton R P,Cox S A,Barree R D.Shale Gas Plays: A Performance Perspective［R］.SPE138447,2010.
［6］Vairogs.Pressure transient tests in formations having stress-sensitive permeability［J］.Journal of Petroleum Technology,1973,25(8):965-970.
［7］Thomas R D,Ward D C.Effect of over-burden pressure and water saturation on gas permeability of the tight sandstone cores［J］.Journal of Petroleum Technology,1972,24(2):120-124.
［8］Kang Yili,Zhang Hao,Chen Yijian,et al.Comprehensive research of tight sandstones gas reservoirs stress sensitivity in Daniudi gas field［J］.Natural Gas Geoscience,2006,17(3):335-338.［康毅力,张浩,陈一健,等.鄂尔多斯盆地大牛地气田致密砂岩气层应力敏感性综合研究［J］.天然气地球科学,2006,17(3):335-338.］
［9］Zhang Hao,Kang Yili,Chen Yijian,et al.Theory of rock deformation and stress sensitivity of tight sandstone reservoir［J］.Natural Gas Geoscience,2004,15(5):482-486.［张浩,康毅力,陈一健,等.致密砂岩油气储层岩石变形理论与应力敏感性［J］.天然气地球科学,2004,15(5):482-486.］
［10］You Lijun,Kang Yili,Chen Yijian,et al.Stress sensitivity of fractured tight gas sands in consideration of fractures and water saturation［J］.Journal of China University of Petroleum:Edition of Natural Science,2006,30(2):59-63.［游利军,康毅力,陈一健,等.考虑裂缝和含水饱和度的致密砂岩应力敏感性［J］.中国石油大学学报:自然科学版,2006,30(2):59-63.］
［11］You Lijun,Kang Yili,Chen Yijian,et al.Influence of water saturation and effective stress on permeability of tight sandstone［J］.Natural Gas Industry,2004,24(12):105-107.［游利军,康毅力,陈一健,等.含水饱和度和有效应力对致密砂岩有效渗透率的影响［J］.天然气工业,2004,24(12):105-107.］
［12］Yang Jian,Kang Yili,Liu Jing,et al.Reinforcement of damage caused by drilling and completion fluids on stress-sensitivity of tight sandstone［J］.Natural Gas Industry,2006,26(8):60-62.［杨建,康毅力,刘静,等.钻井完井液损害对致密砂岩应力敏感性的强化作用［J］.天然气工业,2006,26(8):60-62.］
［13］Agrawal A,Wei Y,Cheng K,et al.A Technical and Economic Study of Completion Techniques in Five Emerging US Gas Shales［R］.SPE135396,2010.
［14］Andrade J,Civan F,Sigal R,et al.Accurate Simulation of Shale-Gas Reservoirs［R］.SPE135564,2010.
［15］Kalatari Dahaghi A,Mohaghegh S D.Numerical Simulation and Multiple Realizationg for Sensitivity Study of Shale Gas Reservior［R］.SPE141058,2011.
［16］Wang Yezhong,Kang Yili,Zhang Hao,et al.Responses of carbonatite stress sensitivity to loading time under effective pressure［J］.Drilling & Production Technology,2007,30(3):105-108.［王业众,康毅力,张浩,等.碳酸盐岩应力敏感性对有效应力作用时间的响应［J］.钻采工艺,2007,30(3):105-108.］
［17］Lan Lin,Kang Yili,Chen Yijian,et al.Discussion on evaluation methods for stress sensitivities of low permeability and tight sandstone reservoirs［J］.Drilling Fluid & Completion Fluid,2005,22(3):1-4.［兰林,康毅力,陈一健,等.储层应力敏感性评价实验方法与评价指标探讨［J］.钻井液与完井液,2005,22(3):1-4.］
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号