碳酸盐岩三矿物岩石组分识别模型的建立与应用  

Building and Application of Three-mineral Rock Components Identification Model for Carbonate

作　　者：李晓辉[1] 吴庆岩[1] 庞福基 

机构地区：[1]大庆钻探工程公司测井公司,黑龙江大庆163412

出　　处：《测井技术》2017年第3期301-304,共4页Well Logging Technology

基　　金：大庆油田有限责任公司项目塔东区块下古生界碳酸盐岩储层测井评价技术研究(201505011)

摘　　要：塔里木东南区块碳酸盐岩储层岩石组分复杂,石灰岩、白云岩、硅化岩并存,含量变化大,且呈非均匀状态分布。由于不同组分具有不同的测井响应骨架值,岩石组分的变化导致岩石骨架参数的变化,从而进一步影响岩石孔隙度参数的计算精度。采用三角形图解法,经过优选岩性测井信息,确定端元特征值,建立了三矿物岩石组分识别模型和含量计算的新方法。通过与岩心分析矿物含量对比,平均绝对误差小于7%,能够满足生产需求,为储层参数精确求取奠定了基础。The components of reservoir rock are very complex for the carbonate rocks in southeast Tarim basin. Limestone, dolomite, and silicified rocks coexist and the content of these rocks vary greatly and show heterogeneous distribution. The calculation precision of porosity is affected because of different logging responses and variations of skeleton parameters which are caused by variations of rock component. A new method for calculating content of rock components and identification model of three mineral rock components are built by applying triangle-diagram, optimizing information of litho logic logging and fixing characteristic value of end member. Compared with the mineral content from core analysis, the average absolute error is less than 7% , which lays the foundation for determination of reservoir parameters.

关 键 词：测井解释 碳酸盐岩 矿物组分 岩性识别 三角形图解法 三矿物岩石组分 识别模型 

分 类 号：P631.84[天文地球—地质矿产勘探]