相对介电常数对电磁波电阻率测量值的影响及校正方法  

The Impact of Dielectric on MWD Array Electromagnetic Wave Resistivity Tools and Correction Method

作　　者：杨锦舟[1] 林楠[1] 张海花[1] 魏宝君[2] 

机构地区：[1]胜利石油管理局钻井工艺研究院,山东东营257017 [2]中国石油大学(华东)物理科学与技术学院,山东东营257061

出　　处：《石油钻探技术》2009年第1期29-33,共5页Petroleum Drilling Techniques

基　　金：国家高技术研究发展计划(“863”计划)项目“随钻测井核心探测器关键技术研究”(编号:2006AA060105)部分研究成果

摘　　要：在精度要求较高和频率较高的随钻电磁波电阻率测量值的计算中,相对介电常数的影响通常不能被忽略。介绍了相对介电常数求取的常用方法——特殊值法、近似计算法和均值法,并对各方法的特点进行了对比分析。比较了贝克休斯、哈里伯顿等国际五大油田技术服务公司的相对介电常数取值方法,进行了相对介电常数的选择。实例分析表明,相对介电常数的选取和测量仪器有密切关系,应根据实际的仪器参数进行计算获得相对介电常数的估计值,并在实验室建立相对介电常数校正图版,以供现场校正需要。The impact of dielectric value cannot be ignored when true formation resistivity values are required with high accracy or high resistant formations are measured. This paper systematically demonstrates dielectric effects on the MWD array electromagnetic propagation resistivity tools. Several methods such as special value, approximative formula, medium- value formula etc. are compared and analyzed. The dielectric constant of five worldwide companies was compared and the dielectric constant was selected. It shows dielectric constant is closely related with tools used. The dielectric constant should be estimated based on the tools used. Correction plots of dielectric constant were prepared for field measurement and calibration.

关 键 词：介电常数 电磁波传播测井 电阻率 随钻测井 校正 

分 类 号：TE271[石油与天然气工程—油气井工程]