低渗气藏储层应力敏感性原因及岩石变形机制  

RESERVOIR STRESS SENSITIVITY REASON AND ROCK DEFORMATION MECHANISM OF LOW PERMEABILITY GAS RESERVOIR

作　　者：向祖平[1] 陈中华[2] 谢峰[1] 张箭[1] 肖文联[3] 

机构地区：[1]中石化西南油气分公司勘探开发研究院,四川成都610086 [2]中石油西南油气田公司勘探开发研究院,四川成都610081 [3]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《大庆石油地质与开发》2011年第1期103-106,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油科技创新基金“含CO2高含硫气藏硫沉积预测模型及应用研究”（2008D-5006-02-09）和中国石油天然气集团公司中青年创新基金项目“注N2开发有水气藏中基于分形理论的气水两相微观渗流机理及其应用研究”（07E1016）联合资助.

摘　　要：低渗致密气藏由于其自身的地质特征，在衰竭式开发过程中表现出较强的储层渗透率应力敏感性，其对气藏开发效果的影响已有较多学者研究，但关于引起储层应力敏感性的内在原因和控制岩石变形的机制却鲜有研究。在有效应力理论及实验研究基础上，从储层介质类型、岩石组成、黏土矿物成分及含量、孔喉结构特征及有效应力定律等方面进行研究，从深层次认识清楚低渗气藏储层应力敏感性原因及岩石变形机制，为该类气藏制定合理的开发技术界限以及开发调整方案提供了有力的理论支撑。Low permeable tight gas reservoir is shown strong stress sensitivity of reservoir permeability in the depletion type development because of its geological characteristics, at present, many scholars have researched the influence to the effects of gas reservoir development, but hardly researched the reasons resulted from reservoir stress sen- sitivity and mechanism controlled rock deformation. Based on the effective stress theory and experimental research, this paper studies reservoir material type, rock composition, clay mineral component and content, characteristics of pore throat structure and effective stress rule, and understands the stress sensitivity and rock deformation mecha- nism of low permeable gas reservoir, which provide the powerful theoretical support for establishing the reasonable development technique limit and plan of this type of gas reservoir.

关 键 词：低渗气藏 应力敏感 变形机制 有效应力 响应曲面法 

分 类 号：TE311[石油与天然气工程—油气田开发工程]