利用多测井参数预测致密砂岩脆性指数方法研究  

Research on prediction method of tight sandstone brittleness index using multiple logging parameters

作　　者：袁思乔 刘之的 王鼎涵 YUAN SiQiao;LIU ZhiDi;WANG DingHan(College of the Geoscience and Engineeringy Xi'an Shiyou University,Xi'an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an 710065,China;Petroleum Engineering Institute,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]陕西省油气成藏地质学重点实验室,西安710065 [3]中国石油大学(北京)石油工程学院,北京102249

出　　处：《地球物理学进展》2022年第1期312-319,共8页Progress in Geophysics

基　　金：陕西省教育厅重点科学研究计划项目(20JY056)资助。

摘　　要：致密砂岩储层脆性指数精准预测直接关系到储层压裂方案设计和施工效果.本文以吉林大情字井油田青一段致密砂岩储层为研究对象,充分利用测井和脆性指数室内分析测试资料,在岩心归位的基础上,采用交会图相关性分析法开展了脆性指数的敏感性测井参数优选,并结合层次分析法构建了适用于研究区致密砂岩储层的脆性指数测井预测模型.研究结果表明,声波、密度测井能够较好地反映脆性指数,电阻率次之,补偿中子和自然伽马则相对较差,因此在构建脆性指数测井预测模型时,应首选声波、密度测井,其次考虑电阻率等测井参数;该法所构建的模型能够较准确地预测研究区的致密砂岩脆性指数,预测结果与弹性参数法较为一致,可为未测横波时差的储层脆性指数预测提供一种新途径.Accurate prediction of brittleness index of tight sandstone reservoir is directly related to the design of reservoir fracturing scheme and operation effect. In this paper, taking the tight sandstone reservoir of Qing1 member in Daqingzijing oilfield in Jilin Province as the research object, the sensitivity logging parameters optimization of brittle index is carried out by using cross plot correlation analysis method on the basis of core homing by making full use of logging and laboratory analysis and test data of brittle index, Combined with the analytic hierarchy process, the brittle index logging prediction model for tight sandstone reservoirs in the study area is established. The results show that acoustic and density logging can better reflect the brittleness index, followed by resistivity, while compensated neutron and natural gamma are relatively poor. The new brittleness index model can accurately predict the brittleness index of tight sandstone, and the prediction results are consistent with the elastic parameter method, which can provide a new way for predicting the brittleness index of reservoir without measuring S-wave time difference.

关 键 词：脆性指数 致密储层 敏感性分析 测井预测 层次分析法 

分 类 号：P631[天文地球—地质矿产勘探]