随钻双侧向电阻率测井响应数值模拟分析  

Numerical Analysis of Logging Responses for Dual Laterolog Resistivity Logging-while-drilling Tool

作　　者：朱军 杨善森 刘刚[1] 吴显 熊焱春 李留 

机构地区：[1]中国石油集团测井有限公司随钻测井中心,陕西西安710054

出　　处：《测井技术》2017年第2期146-150,共5页Well Logging Technology

基　　金：中国石油集团测井有限公司课题随钻侧向电阻率测井仪研制(CPL2012-A06)

摘　　要：一种新的随钻电极电流型电阻率测井仪即双侧向电阻率随钻测井仪DLR已进入现场试验阶段。该仪器提供深、浅2种探测深度电阻率曲线,可用于判断随钻过程中的地层侵入情况和钻后地层评价。介绍了该仪器的电极系排列和测量原理,通过数值模拟计算,分析了该仪器的仪器常数及测井响应的井眼影响、分层能力、探测深度及侵入影响等探测特性。数值模拟结果表明,与同类仪器相比较,该仪器具有更好的分层能力、更大的探测深度和较小的井眼影响。A new LWD electrode-current resistivity logging tool, i. e. , Dual Laterolog Resistivity Logging-while-drilling tool （DLR） has been developed and has begun to be tested in oilfields. DLR can provide deep ＆ shallow resistivity curves, used for identifying mud invasion and formation evaluation during drilling high angle and horizontal wells. This paper presents the DLR＇s electrode array, measurement principle, tool constant and response characteristics of borehole effect, vertical resolution, invasion by 2D and 3D numerical modeling. Compared with the other LWD laterolog resistivity tools, the numerical results show that DLR has a deeper DOI, better resolution and less borehole effect.

关 键 词：随钻双侧向测井 电阻率 电极系 井眼影响 分辨率 侵入影响 探测深度 

分 类 号：P631.84[天文地球—地质矿产勘探]