基于常规动态电法测定岩石类别的测井方法来测定含水饱和度的一种新技术  

A new technique for measuring water saturation based on the logging method of conventional dynamic electrical method

作　　者：齐国锋 仝涛 张建辉 张凯 Qi Guofeng;Tong Tao;Zhang Jianhui;Zhang Kai

机构地区：[1]中国石油集团测井有限公司天津分公司 [2]中国石油集团测井有限公司青海分公司 [3]中国石油集团测井有限公司天津制造厂

出　　处：《国外测井技术》2024年第1期47-54,M0002,共9页World Well Logging Technology

摘　　要：油气藏流体饱和度是评价油气藏资源最重要的参数。虽然已经提出了许多方法来预测饱和指数,但大多数没有根据岩石孔隙结构的电学特性,将储层岩石样品划分为具有相同电性的组分,这样可以提高预估饱和度精度。本文提出了一种新技术,根据电学动态变量(ηele,D),将岩石样品分为不同的电学岩石类型。使用这种方法,可以在整个储层深度内估计含水饱和度。本文使用了25个岩芯样品,根据提出的电学岩石分类方法将其分为四组。测定电学动态变量的高值和其附近的离散因子证实了该方法的应用。因此,可以得出结论,电学动态变量是分组不同电学岩石最合适的工具。结合岩性分类方法,通过不同取芯深度的岩心电性参数、以及测井数据相关性分析,可有效预测不同深度地层岩石的初始含水饱和度。fluid saturation is the most important parameter to evaluate reservoir resources.Although many methods have been proposed to predict the saturation index,most do not classify the reservoir rock samples into components with the same electrical properties of the rock pore structure,which can improve the estimated saturation accuracy.This paper presents a new technique to divide the rock samples into different electrical rock types according to the electrical dynamic variables(ηele,D).Using this method,water saturation can be estimated over the entire reservoir depth.This paper used 25 core samples that were divided into four groups according to the proposed electrical rock classification method.The determination of high values of the electrical dynamic variables and their nearby discrete factors confirmed the application of the method.Therefore,it can be concluded that the electrical dynamical variables are the most appropriate tool for grouping different electrical rocks.Combined with the lithology classification method,the initial water saturation of rocks at different depths can be effectively predicted by the electrocore parameters of different core depths and the correlation analysis of logging data.

关 键 词：含水饱和度 地层电阻率系数 电阻率指数 电阻率测井 

分 类 号：G63[文化科学—教育学]