普光气田须家河组黏土矿物及胶结物对致密砂岩储层的影响  

Effect of clay minerals and cements in Xujiahe formation of Puguang gasfield, Sichuan Basin on tight sandstone reservoir formation

作　　者：颜其彬[1] 陈培元[1] 杨辉廷[1] 杨新涛[1] 何超红[1] 刘欣[2] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]中石化中原油田分公司勘探开发科学研究院,河南濮阳457001

出　　处：《中南大学学报（自然科学版）》2014年第5期1574-1582,共9页Journal of Central South University:Science and Technology

基　　金：中国石油科技创新基金资助项目(2011D-5006-0105);国家重点基础研究发展计划("973"计划)项目(2012CB214803);"十二五"国家科技重大专项(2011ZX05017-001;2011ZX05049);四川省重点建设学科项目(SZD0414)

摘　　要：普光气田须家河组属于典型的特低孔、特低渗致密砂岩储层,在储层常规薄片、X线衍射、阴极发光和扫描电镜分析的基础上,研究黏土矿物和胶结物的主要类型、赋存方式及其对储集性能的影响。研究结果表明:须家河组黏土矿物主要为高岭石、伊利石与绿泥石,其中高岭石与伊利石随埋深的增加逐渐减少,而绿泥石则相反;受砂岩成熟度影响,黏土矿物绝对含量对储层物性影响不大,仅起填隙的作用,绿泥石对储层的发育具有积极性影响,且搭桥式的赋存方式对储层渗透率影响显著。须家河组储层中的胶结物主要包括泥质、碳酸盐与硅质胶结物,其中,碳酸盐胶结物纵向均有发育,硅质胶结物自上而下分布逐渐减少,碳酸盐胶结物与硅质胶结物均不利于储层的发育。The Upper Triassic Xujiahe Formation of the Puguang gasfield, northeastern Sichuan Basin belongs to a typical type of tight sandstone reservoir, with ultra-low porosities and permeabilities. Based on conventional thin section, X-ray diffraction, cathode luminescence and scanning electronic microscope analyses, the types, occurrence of clay minerals and cements and their influence on reservoir properties of Xujiahe Formation were studied. The result shows that the clay minerals in Xujiahe Formation mainly consist of kaolinite, chlorite and illite. The content of kaolinite and illite gradually degrades with the increase of buried depth, but the chlorite is just the opposite. The influence of clay mineral absolute content on the sandstone properties is slight on account of the sandstone maturation, only with the effect of filling. In contrast, the chlorite is beneficial to the reservoir develop, and the occurrence of pore bridging has the biggest influence on reservoir permeability. The cements mainly consist of argillaceous, carbonate and siliceous cements. Among them, the carbonate cement can be found on the vertical. The distribution of siliceous cement gradually decreases from top to base. Carbonate cement and siliceous cement are detrimental to the development of the reservoir.

关 键 词：黏土矿物 胶结物 储层物性 须家河组 普光气田 

分 类 号：TE122[石油与天然气工程—油气勘探]