苏77山2^3段低阻气层的形成机理与识别方法  

Geneses and dentification methods of low-resistivity gas reservoir in the second member of Shanxi Formation in S77 area of Sulige Gasfield

作　　者：陈科贵[1] 齐婷婷[1] 何太洪[2] 涂利辉[2] 张小刚[3] 曾杰[4] 

机构地区：[1]西南石油大学研究生院,四川成都610500 [2]西部钻探工程有限公司,新疆乌鲁木齐830026 [3]长庆油田公司勘探部,陕西西安710018 [4]新疆哈密石油基地吐哈油田吐鲁番采油厂,新疆哈密839009

出　　处：《西安石油大学学报（自然科学版）》2013年第4期23-27,7,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家"973"规划项目(编号:2011CB403002;2011CB403005)

摘　　要：通过对研究区块岩心的扫描电镜、X衍射、黏土矿物分析、阳离子交换容量测量、铸体薄片及水分析等资料的研究发现，高束缚水饱和度是造成苏77山2^3段低电阻的根本原因，高矿化度地层水是直接原因，导电矿物影响微弱．由于低阻气层在电性曲线上与气水层、水层差异不明显，应用常规测井技术和解释方法很难有效识别，在解释过程中容易漏掉气层．提出用孔隙度重叠法、阵列感应测井法和束缚水饱和度法进行低阻气层的识别，与常规测井解释方法相比，解释精度大幅度提高，并将上述方法应用到苏里格气田中，取得了显著效果．According to the research of the cores from S77 area by SEM,X-diffraction,clay mineral analysis,cation exchange capacity measurement,cast thin and water analysis,it is found that,high irreducible water saturation is the primary cause and the formation water of high salinity is the direct cause leading to low-resistivity of the third layer of the second member of Shanxi Formation in S77 area.Conductive minerals only produce weak influence on the resistivity of the layer.Because there is no obvious difference in the electrical resistance curve between low-resistivity gas layer and gas-water layer and water layer,they are difficult to be identified by conventional logging interpretation methods and analysis techniques so some gas layers are often missed in the interpretation section.For this reason,it is proposed to identify low-resistivity gas layers using porosity overlapping method,array induction logging and irreducible water saturation method.Compared with conventional logging interpretation methods,the interpretation accuracy of these methods is higher.They are applied to the Sulige gas field,and good interpretation effect is obtained.

关 键 词：低阻气层 高束缚水饱和度 高矿化度地层水 孔隙度重叠法 束缚水饱和度法 

分 类 号：TE121[石油与天然气工程—油气勘探] P588.247[天文地球—岩石学]