随钻测井环境中地层横波速度测量的数值研究  

Numerical Study for Measurement of Shear Wave Velocity in Logging-while-drilling Environment

作　　者：杨勇[1] 车小花[1] 李俊[1] 张菲[1] 

机构地区：[1]中国石油大学(北京),油气资源与探测国家重点实验室,北京102249

出　　处：《科学技术与工程》2009年第5期1233-1235,共3页Science Technology and Engineering

基　　金：国家自然科学基金重点项目(10534040);国家自然科学基金面上项目(40874097和40574049);高等学校博士学科点专项科研基金(20070425028)的资助

摘　　要：由于慢地层横波速度测量困难,数值考察了多极子声源在裸眼井和随钻测井环境中激发的声场波形。随钻测井环境中,偶极子和四极子声源都能在快地层井孔中激发出携带地层横波信息的地层振型。研究表明在慢地层,偶极子声源激发的钻铤振型严重干扰地层横波波速的测量,低频四极子声源在慢地层井眼中则不会激发出钻铤振型。source is inv Since it is difficult to measurement the velocity of shear wave, the full waveform of LWD multi-pole estigated numerically. In LWD environment,dipole and of shear wave in fast formations. In quadrupole source could measurement velocity excites the collar mode wave disturbing the measurement of shear wave, while quadrupole source could excite the mode wave of formations to measurement the velocity of shear wave.

关 键 词：时域有限差分 声波 随钻测井 速度测量 数值研究 

分 类 号：P631.814[天文地球—地质矿产勘探]