歧口凹陷滨海斜坡深层低渗油气层测井评价与识别方法  

The Method of Logging Evaluation and Identification for Deep & Low Permeability Oil and Gas Reservoir in Binhai Slope of Qikou Sag

作　　者：初广震[1,2] 王怀忠[3] 周宗良[3] 张凡磊[3] 刘东成[3] 肖建玲[3] 

机构地区：[1]中国矿业大学地球科学与工程测绘学院,北京100083 [2]中国石油勘探开发研究院,北京100083 [3]中国石油大港油田勘探开发研究院,天津300280

出　　处：《工程地球物理学报》2017年第6期640-647,共8页Chinese Journal of Engineering Geophysics

基　　金：中国石油天然气股份有限公司重大科技专项(编号:2014E-06)

摘　　要：歧口凹陷滨海斜坡深层沙二、沙三段埋深一般在3 600~4 800m,普遍发育深层低渗油气层。首先对滨海斜坡深层低渗油气层开展了系统的测井综合评价与油气层识别方法研究,并在岩心物性、毛管压力曲线分析的基础上,开展储层品质指数与测井主成分分析,将储层分为两类;然后分油藏类型和储层类型建立流体综合评价指数—孔隙度交会图版,进行油水层的判别;再运用微尺度特征参数描述储层微观孔隙结构特征,分地层水电阻率建立不同地层水电阻率范围的胶结指数、饱和度指数与微尺度特征参数之间关系;最后应用声波时差、密度、补偿中子三孔隙度曲线的测井响应,建立了三孔隙度差值识别深层气的方法,并通过试油井验证了方法的有效性。The depth of the second and third member of the Shahejie formation is generally between 3 600 m and 4 800 m in Binhai slope of Qikou sag and deep ＆ low permeability oil and gas reservoir is widely developed. In this paper, the logging comprehensive evaluation and the identification method of oil and gas reservoir are carried out for the deep ＆ low per-meability reservoir in Binhai slope. Based on the analysis of core physical properties and capillary pressure curve, the reservoir quality index and the main components of the logging are analyzed and the reservoirs are divided into two types. The cross plot of fluid compre-hensive evaluation index and porosity is established for different reservoir types to discrimi-nate oil and water layer. By using micro scale characteristic parameters to describe the mi-croscopic pore structure characteristics of reservoir, the relationship between cementing in-dex, saturation index and micro scale characteristic parameters of different formation water resistivity ranges is established. By applying the logging response of acoustic time differ-ence, density, three porosity curve of compensation neutron, the method of identification deep gas is established by the three porosity difference, and the effectiveness of the method is verified by testing the oil well.

关 键 词：测井评价 深层低渗 流体综合评价指数 微尺度特征参数 三孔隙度差值 

分 类 号：P631.8[天文地球—地质矿产勘探]