EILog井径测井仪偏心校正技术研究及应用  

Eccentricity Correction Method and Application of EILog Caliper Logging Tool

作　　者：王辉[1] 杨凯 党益伟 刘李春 罗成龙 王志磊 贺剑 陈金明 吴学涛 王炜 宗飞 田博宁 WANG Hui;YANG Kai;DANG Yiwei;LIU Lichun;LUO Chenglong;WANG Zhilei;HE Jian;CHEN Jinming;WU Xuetao;WANG Wei;ZONG Fei;TIAN Boning(Central Center of Materials and Equipment China National Logging Corparation Xi′an,Shaanxi 710201,China;Changqing branch,China National Logging Corparation,Xi′an,Shaanxi 710201,China)

机构地区：[1]中国石油集团测井有限公司物资装备公司中部中心,陕西西安710201 [2]中国石油集团测井有限公司长庆分公司,陕西西安710201

出　　处：《石油管材与仪器》2023年第6期86-91,共6页Petroleum Tubular Goods & Instruments

基　　金：中国石油集团测井有限公司科技项目“EILog井径测井偏心校正技术研究”(编号:F-D62721K0.02)。

摘　　要：由于自身重量的影响,EILog井径测井仪在大斜度井、水平井中处于偏心状态,所测的井径曲线出现严重缩径现象,测量误差不满足要求。分析了误差超标的原因,采用“四点定圆”方法实现井径测井仪的偏心校正,并对测井仪的机械结构、采集电路、相关软件以及井径臂弹簧、电位器固定架和刻度器进行了改进。室内实验和现场测井结果表明,改进后的井径测井仪采集的井径值与钻头尺寸相比误差≤5%,误差达标,解决了大斜度井、水平井规则井眼测量缩径问题。In highly deviated wells and horizontal wells,the EILog caliper tool is in an eccentric state due to the weight of the tool itself.The measured caliper curves are seriously shrunk,and the measurement error does not meet the logging technical requirements.This paper analyzed the reasons for the error exceeding the standard,and adopted the four point rounding method to realize the eccentricity correction of the instrument.As a supporting measure,the caliper structure,circuit,software,spring,potentiometer fixing frame and calibrator were improved.The indoor test and field logging by the improved instrument showed that the error between the collected well diameter and the bit size was within 5%,and the error met the standard requirement.The improved instrument solved the problem of the measured caliper curves shrinkage in both regularly highly inclined wells and regularly horizontal wells.

关 键 词：井径 偏心 校正 四点定圆 

分 类 号：P631.81[天文地球—地质矿产勘探]