FAULTING—INDUCED PERMEABILITY CHANGE IN SHIRAHAMA SANDSTONE AND IMPLICATION FOR CO2AQUIFER STORAGE岩石力学与工程学报论文
【题名】：FAULTING—INDUCED PERMEABILITY CHANGE IN SHIRAHAMA SANDSTONE AND IMPLICATION FOR CO2AQUIFER STORAGE岩石力学与工程学报论文(FAULTING—INDUCED PERMEABILITY CHANGE IN SHIRAHAMA SANDSTONE AND IMPLICATION FOR CO2AQUIFER STORAGEYanShiLiXueYuGongChengXueBaoLunWen) 【关键词】：CO2 砂岩 渗透 含水层 隔离 【keywords】：CO2 ShaYan ShenTou HanShuiCeng GeLi 【作者】：LiXiaochun,TakahashiManabu,WuZhishen,KoideHitoshi,OhsumiTakashi,      【来源】： 知识词典 【期刊名称】：岩石力学与工程学报(YanShiLiXueYuGongChengXueBao) 【国际标准刊号】：1000-6915        【国内统一刊号】：42-1397 【作者单位】：[1]CO2StorageResearchGroup,ResearchInnovativeTechnologyfortheEarth,Kyoto619-0292Japan [2]ResearchCenterforDeepGeologicalEnvironments,AIST,Tsukuba605-8567Japan [3]DepartmentofCivilandUrbanEngineering,IbarakiUniversity,Hitachi316-0033Japan([1]CO2StorageResearchGroup,ResearchInnovativeTechnologyfortheEarth,Kyoto619-0292Japan [2]ResearchCenterforDeepGeologicalEnvironments,AIST,Tsukuba605-8567Japan [3]DepartmentofCivilandUrbanEngineering,IbarakiUniversity,Hitachi316-0033Japan) 【分类号】：P588.212      【页码】：-995-1001      【出版年】：2003.6 【下载地址】：下载pdf全文         The long-term safety assessment of CO2 aquifer storage requires a deep understanding o permeability evolution during inelastic deformations in sedimentary rocks.The permeability change has been measured in the entire process from elastic,plastic,post-failure to axial stress unloading for Shirahama sandstone subjected to triaxial compressions under various confining pressures.The measurements revealed that the confining pressure plays an important role in controlling inelastic deformation behavior and the tendency of the permeability evolution.In the brittle faulting regime under a low confining pressure,significant increase in permeability accompanied by dilatancy can be observed.In brittle-ductile transition regime and ductile regime,faulting or inelastic deformation does not necessarily and significantly enhance the permeability,and the permeability during deformation is lower than their corresponding initial values.Microscopic observations revealed that the two mechanisms:(1)shear-enhanced cracking,and (2)grain crushing,are responsible for these inelastic deformation and permeability evolution tendency.The presented results suggested that storing CO2 in those sites where ductile deformation prevails may be more safe.
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