含钙质充填节理的砂岩电阻率特性数值模拟研究  

Numerical simulation study of sandstone resistivity characteristics of calcium-bearing flling joints

作　　者：万昊民 周萌 赵亚栋 龚守捍 王世贸 齐兴华[1] Wan Haomin;Zhou Meng;Zhao Yadong;Gong Shouhan;Wang Shimao;Qi Xinghua

机构地区：[1]新疆工程学院新疆 [2]中国石油测井公司天津分公司

出　　处：《国外测井技术》2024年第6期54-61,2,共9页World Well Logging Technology

基　　金：该研究受新疆工程学院大学生创新创业项目(编号S202310994008);地球物理科学技术工作室经费资助。

摘　　要：钙质充填节理是一种填隙物以钙元素为主的节理,节理的存在会影响到砂岩储层孔隙度估算和渗透率的准确度。本文利用COMSOL Multiphysics软件模拟钙质充填节理在砂岩中的发育情况,研究节理厚度,节理角度,平行节理间距及交错节理交叉点偏心位置对砂岩电阻率的影响。结果表明,节理厚度与节理角度的改变对砂岩电阻率的影响较大,节理厚度的增大和节理角度的增大分别导致砂岩电阻率呈近线性的上升和二次函数的下降;平行节理间距与交错节理的交叉点偏心位置的改变对砂岩电阻率影响很小。本文为探究节理在岩石中的电阻率响应特征提供了有益参考。Calcarefilling is a joint dominated by calcium element.The existence of joints will affect the accuracy of porosity estimation and permeability of sandstone reservoir.In this paper,COMSOL Multiphysics software was used to simulate the development of calcareous filling joints in sandstone,and the effects of joint thickness,joint Angle,parallel joint spacing and staggered joint intersection eccentric position on sandstone resistivity were investigated.The results show that the change of joint thickness and the increase of the sandstone resistivity and the decrease of quadratic function respectively;the change of parallel joint spacing and intersection has litle influence on the sandstone resistivity.This paper provides a useful reference for exploring the resistivity response characteristics of joints in rocks.

关 键 词：含钙质充填节理 砂岩 电阻率 有限元 COMSOL Multiphysics 

分 类 号：TU4[建筑科学—土工工程]