徐家围子断陷沙河子组砂砾岩储层岩性测井识别方法  

Identification of lithology logging in glutenite reservoir in Shahezi group of Xujiaweizi fault

作　　者：金雪英[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《东北石油大学学报》2013年第4期47-54,121,共9页Journal of Northeast Petroleum University

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB219300)

摘　　要：针对徐家围子断陷沙河子组地层岩性复杂、非均质性强、岩性识别精度较低的现状,根据取心、黏土、薄片分析等资料,利用岩心刻度测井资料,将沙河子组岩性归类:首先,由岩石成分分析各类岩性的常规测井响应特征,建立解释图版;然后,采用电导率异常对比法,利用Bortex模块从电成像测井资料中提取能够定量表征地层砾石含量的结构指示参数;最后,利用常规测井和成像测井,选择对岩性反映敏感的测井参数,建立"成分加结构"主成分分析的岩性识别方法,实现岩性计算机自动识别.研究区10口井的岩性解释结果表明,经过32个取心段岩性验证,岩性识别符合率为90.6%.该方法不但解决成像测井定量识别岩性的难题,而且提高沙河子组地层岩性解释的精度和效率,为储层测井评价奠定基础.Shahezi group of Xujiaweizi fault has complex lithology,significant heterogeneity,resulting in poor lithologic recognition accuracy.Therefore,this paper combines core,clay analysis and slice analysis data,through the method that logging data scaled by core data,divide lithology into three categories.Firstly,analyze conventional logging response of different lithology.Secondly,apply electric conductivity abnormally contrast method to process the imaging logging data by BorTex module,and get quantitative structure identification parameters of sandstone and glutenite.Finally,through comprehensive application of conventional logging data and imaging logging data,select the sensitive parameters to lithology variation,and apply principal component analysis method to set up lithology identification method,and realize automotive lithology identification by compiling program.Through the application of lithology identification to 10 wells in the study area,the coincidence rate of lithology interpretation by the method is 90.6%.This method not only solves the problem of quantitative lithology identification by imaging logging,but also improves lithologic interpretation precision and efficiency of Shahezi,it lays a foundation for reservoir logging evaluation with good application prospect.

关 键 词：砂砾岩 岩性识别 电成像测井 砾石含量 主成分分析 

分 类 号：TE55[石油与天然气工程—油气田开发工程]