基于MRGC聚类方法的测井相分析和岩性识别--以Z油田潜山地层为例  

Logging facies analysis and lithology identification based on MRGCclustering method--by taking buried hill formation of Z oilfield as an example

作　　者：余秋均 YU Qiujun(Exploration&Development Research Institute of Liaohe Oilfield Company,PetroChina,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《石油地质与工程》2022年第1期31-38,共8页Petroleum Geology and Engineering

摘　　要：为了解决常规岩性识别方法对于较为精细岩性识别和复杂岩性识别困难的问题,通过论述MRGC聚类方法和KNN算法传播器的基本原理,提出基于MRGC聚类方法的测井相分析和岩性识别方法及其流程。即优选能反映岩性特征的测井曲线,利用MRGC聚类方法进行测井相自动划分,并用录井及岩心等地质资料建立的岩相数据库对所划分的测井相进行标定,建立岩性识别模型;通过KNN算法传播器将模型推广应用于未取心井,实现岩性识别。该方法在Z油田潜山地层应用,有效地识别出潜山地层中的风化壳角砾岩、硅质砂岩、硅质粉砂岩、硅质泥岩、灰岩、泥质灰岩、灰质泥岩、生物灰岩共8种主要岩性,其结果与录井、取心资料符合率达80%以上,表明其在潜山等地层岩性识别中具有很好的适用性。In order to solve the difficulty of conventional lithology identification methods in fine lithology identification and complex lithology identification,by discussing the basic principle of MRGC clustering method and KNN algorithm propagator,a logging facies analysis and lithology identification method and its process based on MRGC clustering method are proposed.The logging curves that can reflect the special lithology are optimized,the logging facies are automatically divided by MRGC clustering method,and the divided logging facies are calibrated by the lithofacies database established by logging and core geological data,to establish the lithology identification model.The model is extended to non-coring wells through KNN algorithm propagator to realize lithology identification.The application of this method in buried hill formation of Z oilfield effectively identifies 8 main lithology in buried hill formation,including weathered crust breccia,siliceous sandstone,siliceous siltstone,siliceous mudstone,limestone,argillaceous limestone,calcareous mudstone and biological limestone.The coincidence rate between the results and logging and coring data is more than 80%,indicating that it has good applicability in lithology identification of buried hill and other strata.

关 键 词：MRGC聚类 测井相分析 岩性识别 风化壳 基岩 潜山 

分 类 号：P631.8[天文地球—地质矿产勘探]