西南石油大学学报（自然科学版）Issue(6)：1-8,8.DOI:10.3863/j.issn.1674-5086.2013.06.001
井中偶极声源激励下的反射横波实验研究
Experimental Study on Shear Wave Reflection of a Borehole Dipole Source Excitation
摘要
Abstract
Through related experimental studies on dipole shear wave remote detection measurement-mode,we study shear wave reflection of a borehole dipole source excitation from near-borehole formation interface,and measure full waveform in-side and outside borehole under different source positions,different polarization directions and different formation interface characteristics. The experimental results show that a dipole source in a fluid-filled borehole excites direct flexural wave prop-agating along borehole and outside borehole,but also radiates two types of shear wave,which are SH-wave and SV-wave, respectively. Along with the dipole polarization direction from 0° to 90°,reflected shear wave amplitude gradually decreases, and verified that the dipole source for near-borehole reflector has obvious azimuthal directivity characteristics,which can be used for determining near-borehole geological structure strike. Under the solid-liquid or solid-gas formation interface charac-teristic,total reflection of SH-wave at the reflector interface will happen,and mode conversion occurs to SV wave,so SH-wave reflection helps to remote detection imaging,and has unique advantages for fractures.关键词
偶极声源/反射横波/物理模拟/振动方向/界面特性Key words
dipole source/reflected shear wave/physical simulation/polarization directions/interface properties分类
能源科技引用本文复制引用
魏周拓,陈雪莲..井中偶极声源激励下的反射横波实验研究[J].西南石油大学学报（自然科学版）,2013,(6):1-8,8.基金项目
山东省自然科学基金（ZR2011DQ020）。 （）
