基于自然伽马能谱测井信息的黏土矿物纵向分布特征研究  

Longitudinal distribution characteristics of clay minerals based on natural gamma-ray spectrum logging information

作　　者：袁枫 高楚桥[1,2] 刘建新 赵彬[1,2] YUAN Feng;GAO ChuQiao;LIU JianXin;ZHAO Bin(College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,China;Key Laboratory of Oil and Gas Resources and Exploration Technology,Ministry of Education,Wuhan 430100,China;CNOOC China Limited,Shanghai Branch,Shanghai 200335,China)

机构地区：[1]长江大学地球物理与石油资源学院,武汉430100 [2]油气资源与勘探技术教育部重点实验室,武汉430100 [3]中海石油(中国)有限公司上海分公司,上海200335

出　　处：《地球物理学进展》2023年第6期2633-2641,共9页Progress in Geophysics

基　　金：国家重大科技专项“低渗-致密气层测井识别及综合评价技术”(2016ZX05027-002-002)资助。

摘　　要：对地层中黏土矿物的种类和含量进行预测,进而分析得到黏土矿物的纵向分布特征,可以为研究区的油层保护、勘探与开发提供较为可靠的基础分析资料.在前人的研究基础上,分析了研究区黏土矿物含量与自然伽马能谱测井响应特征值的相关性,随后利用Th-K交会图版法确定了研究区L1井黏土矿物的大致组成,并建立了多元回归拟合和多矿物反演两种数学模型对研究区L1井黏土矿物的具体含量进行计算,最后对研究区L1井黏土矿物含量沿井轴的纵向分布特征进行分析,发现研究区L1井在深度约3000~3300 m处主要发生了黏土矿物的转化反应,在整个深度剖面上研究区的黏土矿物纵向分布特征符合地层中黏土矿物的一般演变规律.通过对研究区L1井黏土矿物含量的计算和纵向分布特征进行分析,发现应用效果较好,在该地区具有一定的可行性,为利用测井信息研究黏土矿物起到了一定的参考价值.By predicting the types and contents of clay minerals in the formation,and then analyzing the vertical distribution characteristics of clay minerals,it can provide reliable basic analysis data for oil layer protection,exploration and development in the study area.On the basis of previous studies,the correlation between clay mineral content in the study area and the characteristic value of natural gamma-ray spectrum logging response was analyzed,and then the approximate composition of clay minerals in well L1 in the study area was determined by thorium-potassium crossplot method,and two mathematical models of multiple regression fitting and multi-mineral inversion were established to calculate the specific content of clay minerals in well L1 in the study area,and finally the research was conducted The longitudinal distribution characteristics of clay mineral content along the shaft of well L1 in the study area are analyzed,and it is found that the conversion reaction of clay mineral mainly occurs at the depth of about from 3000 to 3300 meters in well L1 in the study area.The longitudinal distribution characteristics of clay mineral in the whole depth profile in the study area are in line with the general evolution law of clay mineral in the formation.Through the calculation of clay mineral content and the analysis of vertical distribution characteristics of well L1 in the study area,it is found that the application effect is good,and it has certain feasibility in this area,and it plays a certain reference value for the study of clay minerals by using logging information.

关 键 词：自然伽马能谱测井 黏土矿物 多元回归拟合 多矿物反演 

分 类 号：P631[天文地球—地质矿产勘探]