基于COMSOL的阵列侧向测井井眼和围岩校正程序设计  

Design of Borehole and Surrounding Rock Correction Program for Array Lateral Logging Based on COMSOL

作　　者：梁裕佳 田福斌 李飞翔 LIANG Yujia;TIAN Fubin;LI Feixiang(School of Electronic Engineering,Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西安石油大学电子工程学院,陕西西安710065

出　　处：《仪表技术》2021年第5期27-30,共4页Instrumentation Technology

摘　　要：阵列侧向测井是以三侧向测井和双侧向测井为基础,可以给出六条探测深度不同的测井曲线的测井方法。研究阵列侧向测井的井眼校正和围岩校正程序设计,即基于有限元分析软件COMSOL进行阵列侧向测井数值模拟,利用MATLAB软件进行井眼和围岩校正程序设计。从阵列侧向测井工作原理出发,根据仪器信号聚焦过程和电场叠加原理,通过测量各电极电位,列方程求得各电极电流;推导并给出了K值、视电阻率计算公式。基于阵列侧向测井模拟数据,应用MATLAB软件编程实现井眼校正和围岩校正。讨论地层电阻率、井径变化对阵列侧向测井响应的影响,为测井解释提供指导。The array lateral logging can provide 6 logging curves with different detection depths based on three lateral logging and dual lateral logging. This subject studies the program design of borehole correction and surrounding rock correction for array lateral logging, namely, the numerical simulation of array lateral logging based on the finite element analysis software COMSOL, and the program design of borehole and surrounding rock correction using MATLAB software. Starting from the working principle of the array lateral logging, according to the instrument signal focusing process and the principle of electric field superposition, the current of each electrode is obtained by measuring the potential of each electrode and solving the equations. The calculation formulas of K value and apparent resistivity are deduced and given. Based on the array lateral logging simulation data, MATLAB software programming is used to realize borehole correction and surrounding rock correction. The influence of formation resistivity and well diameter change on array lateral logging response is discussed, which provides guidance for logging interpretation.

关 键 词：阵列侧向测井 井眼校正 围岩校正 视电阻率 

分 类 号：P631.8[天文地球—地质矿产勘探]