摘要
随钻电阻率测井具有预测井周围和钻头前方各种地质情况的能力,能为科学化钻井提供有利的依据。在对随钻电阻率测井原理分析的基础上,给出了电磁场量与地层电阻率之间的转换关系,计算得到了随钻电阻率测井仪器的探测特性,包括探测深度和纵向分辨率。分析结果表明:衰减电阻率比相移电阻率的探测深度要大;而相移电阻率比衰减电阻率的纵向分辨率要高。这些结论可以用来判断地层侵入和围岩情况,以及在随钻电阻率测井资料解释时参考。
Resistivity logging-while-drilling method can predict various geologic situations around the borehole and ahead of the drill bit, and can provide favorable evidences for optimizing the drill scheme. On the basis of the analysis of resistivity logging-while-drilling theory, the paper presented the conversion relationship between the electromagnetic field amount and resistivity of the stratum, and computed the prospecting properties of the instrument for logging-while-drilling, including prospecting depth and vertical resolution. The analysis results indicate, compared with phase-shift resistivity logging, attenuation resistivity logging has deeper prospecting depth, but poorer vertical resolution. These conclusions can be used to judge stratum invasion and the surrounding rock situations, and can be referred for data interpretation of resistivity logging-while-drilling.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2007年第5期61-62,共2页
Natural Gas Industry
关键词
随钻测井
电阻率测井
探测
非均匀介质
数值分析
logging-while-drilling, resistivity logging, prospect, heterogeneous medium, numerical analysis
