随钻电磁波电阻率测井视电阻率提取及正演模拟分析  

The Extraction of Apparent Resistivity and Forward Simulation for Resistivity of Logging while Drilling

作　　者：王滨涛[1,2] 吴锡令[1,2] 苑娜 丁柱 王晓星[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]大庆测井一公司研究所,大庆163412

出　　处：《科学技术与工程》2010年第13期3050-3053,共4页Science Technology and Engineering

摘　　要：随钻电磁波电阻率通过记录接收线圈之间的幅度比和相位差求取视电阻率值,反映地层物理量信息。应用有限元法对传感器测井响应特性进行了模拟。结果表明,相比于幅度差、相位差在高频率、短源距的条件下探测响应更加敏感。提取的视电阻率曲线显示,在围岩和侵入的影响下,视电阻率值和实际电阻率值之间存在差异,高频率、短源距视电阻率曲线更加接近实际电阻率值。Resistivity of logging while drilling reflects strata information by using recording amplitude ratio and phase difference of two different receiving coil.The simulation of logging by fem shows that phase difference at high frequency and short spacing detects more sensitive than amplitude ratio.The extraction of apparent resistivity shows that there are differences between apparent resistivity and real resistivity as surrounding rock and invasion zone.The apparent resistivity at high frequency and short spacing are close to real resistivity.

关 键 词：随钻电磁波电阻率 有限元 幅度比 相位差 视电阻率 

分 类 号：P631.811[天文地球—地质矿产勘探]