低渗透储层应力敏感性研究进展及展望  

Review and Prospect about Study on Stress-Sensitivity of Low-Permeability Reservoir

作　　者：陈金辉[1] 康毅力[1] 游利军[1] 方俊伟[1] 

机构地区：[1]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：《天然气地球科学》2011年第1期182-189,共8页Natural Gas Geoscience

基　　金：国家"973"课题(编号:2010CB226705);国家科技重大专项(编号:2008ZX05022-004-04HZ2008ZX05045-003-01)联合资助

摘　　要：随着常规油气资源量日益减少,低渗透储层已逐渐成为油气勘探开发的重点。低渗透储层具有较强的应力敏感性,严重制约着其经济开发与管理。主要从实验评价方法、流固耦合模型及油气藏产能方程3个方面对国内外低渗透储层应力敏感性研究进展进行总结。分析表明,基于原地应力的评价方法和多项式本构关系具有较高的评价精度;融合流固耦合理论和油气藏产能方程的数值模拟软件开发及注水能力预测将是未来发展之热点。指出仅基于唯象学和纯粹的理论推导无法从本质上揭示应力敏感机理,应着力把实验数据、理论公式及储层物性耦合起来,建立一个全面的应力敏感性评价系统;对于裂缝性储层,构建合理的裂缝面结构模型及缝面接触计算机模拟方法,由单条裂缝逐渐过渡到裂缝网络,并考虑天然裂缝与水力裂缝之间的相互作用机理是目前该领域亟待突破的瓶颈。Low-permeability reservoir has been paid more attention to in exploration and development as conventional reserve decreases,while economical development and management for low-permeability reservoir are severely restricted by stress-sensitivity.A summary about previous on stress-sensitivity was made from evaluation method,fluid-solid coupling model and deliverability equation.It is indicated through analyzing that method based on in-situ stress compound with multinomial equation has a desirable accuracy in stress-sensitivity assessment;Development of numerical simulation softwares with regard to fluid-solid coupling and deliverability equation and water injectivity prediction will be the research priorities in this field.It is also pointed out that in no way can stress-sensitive mechanism be revealed merely based on phenomenology or theoretical derivation.It＇s proposed that a comprehensive evaluation system should be obtained taking into account experimental data,theoretical formula and reservoir characteristic;Establishing appropriate structural model of fracture plane and computer simulation method considering interaction between fracture network comprised of natural and hydraulic fractures is the choke point for fracture stress-sensitivity yet to be broken.

关 键 词：低渗透储层 应力敏感性 流固耦合 产能方程 裂缝面结构 裂缝网络 

分 类 号：TE348[石油与天然气工程—油气田开发工程]