摘要
岩石电各向异性以电导率张量表征,实验室中多采用四极法与六极法测得岩石电导率,但难以一次实验完全获得电导率张量的9个分量,若多次实验易造成较大的测量误差.为此本文基于文献研究成果,针对方样岩芯设计电导率张量测量仪,该方案也适用于柱塞岩芯.通过氮气驱替完全水饱的岩芯,温控系统和围压控制系统控制岩芯夹持器内部的温度和压力,可运用上位机控制电极测量不同含水饱和度时岩芯电导率张量的9个分量.该仪器亦可用于柱塞岩芯的岩电实验,通过测得的电导率数据,确定阿尔奇公式的未知系数.通过理论与实验数据分析,验证了该电导率张量测量仪设计方案的可行性.
The electrical anisotropy of rock is characterized by conductivity tensor.The four-pole method and six-pole method are mostly used to measure rock conductivity in the laboratory,but it is difficult to fill the nine components of conductivity tensor in one experiment.And multiple experiments are easy to cause large measurement errors.For this reason,based on the existing document,this paper designs a conductivity tensor measuring instrument for square sample cores.This solution is also suitable for plunger cores.The completely water-saturated core is replaced by nitrogen.The temperature control system and the confining pressure control system control the temperature and pressure inside the core holder.The upper computer control electrode can be used to measure the core conductivity tensor at different water saturations.The instrument can also be used for rock electrical experiments of plunger cores.Through the measured conductivity data,the unknown coefficients of Archie’s formula can be determined.Through the analysis on theoretical and experimental data,the feasibility of the design scheme of the conductivity tensor measuring instrument is verified.
作者
陈延军
张智韬
仵杰
CHEN Yanjun;ZHANG Zhitao;WU Jie(School of Electronic Engineering,Xi’an Shiyou University,Xi’an 710000,China;Key Laboratory of Shaanxi Province for Photoelectric Sensing Logging,Xi’an 710065,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第2期112-117,共6页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(41474108)
陕西省教育厅专项科研计划项目(14JK1577)。
关键词
电各向异性
电导率张量
阿尔奇公式
电阻率指数
electrical anisotropy
conductivity tensor
Archie formula
resistivity index
作者简介
通信联系人:陈延军(1977-),男,河南焦作人,西安石油大学讲师,博士,E-mail:allexist@126.com。
