基于多复合测井参数的复杂岩性核主元识别方法——以开鲁盆地陆西凹陷九佛堂组储层为例  

Kernel principal component identification method for complex lithology based on multi⁃composite logging parameters:A case study of reservoirs in Jiufotang Formation of Luxi Sag in Kailu Basin

作　　者：裴家学[1] 郭晗 周立国[1] 张甲明[1] 田涯 李皓[1] 李雪英[2] 隋强 PEI Jiaxue;GUO Han;ZHOU Liguo;ZHANG Jiaming;TIAN Ya;LI Hao;LI Xueying;SUI Qiang(PetroChina Liaohe Oilfield Company,Panjin 124010,China;School of Earth Sciences,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]中国石油辽河油田公司,辽宁盘锦124010 [2]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《大庆石油地质与开发》2025年第2期136-146,共11页Petroleum Geology & Oilfield Development in Daqing

基　　金：黑龙江省自然科学基金联合引导项目“基于马尔科夫链的厚度随机分布薄互层时频响应机理研究”(LH2021D010)。

摘　　要：开鲁盆地陆西凹陷九佛堂组储层复杂岩性与测井曲线之间存在非线性响应关系,致使常规岩性识别方法存在多解性和不确定性。为此引入4个与储层岩性相关的复合测井参数,增强测井曲线描述复杂岩性非线性响应特征能力;结合高斯核函数和多项式核函数各自的优良特性,构建组合核函数,改善核主元分析方法的全局识别能力;采用K-折交叉验证法确定合理的核半径参数,从而建立一套基于多复合测井参数表征的复杂岩性核主元识别方法。实际岩性数据测试分析结果表明,引入多复合测井参数后,复杂岩性数据在核主元空间具有显著的线性可分性,岩性相对位置集中、固定且区带划分标准明确,表明该岩性划分方法具有良好的稳定性,后验识别符合率92.7%以上,证明该方法在复杂岩性识别中的有效性。研究成果为开鲁盆地复杂岩性区的岩性精确识别提供了一种新的技术思路。Nonlinear response relationship between complex lithology and logging curves of Jiufotang Formation res-ervoir in Luxi Sag of Kailu Basin causes ambiguity and uncertainty of conventional lithology identification methods.Therefore,4 composite logging parameters related to reservoir lithology are introduced to enhance the capability of logging curves to describe nonlinear response characteristics of complex lithology.Combining with excellent charac-teristics of Gaussian kernel function and polynomial kernel function,a composite kernel function is constructed to improve global identification capability of kernel principal component analysis method.K-fold cross validation meth-od is used to determine rational kernel radius parameters,thereby establishing a set of complex lithology kernel principal component identification methods based on characterization of multi-composite logging parameters.Analy-sis results of actual lithology data test show that,after introduction of multi-composite parameters,complex litholo-gy data have significant linear separability in kernel principal component space,with lithology relative position con-centrated,fixed and zones division criteria clear,indicating high stability of this lithology classification method.Posteriori identification coincidence rate is>92.7%,proving the effectiveness of this method in complex lithology identification.The research provides new technical idea for accurate identification of lithologies in complex lithologi-cal zone of Kailu Basin.

关 键 词：核主元分析 岩性识别 复合测井参数 组合核函数 K-折交叉验证法 

分 类 号：P631[天文地球—地质矿产勘探]