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 inside
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 propagating
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 characteristic,
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.