Reflected Sound Field Characteristics of Impulse Source in Open-hole Well during Deep Detection Based on Microscope Technology

  • Jing Zhou
Keywords: Sound Wave Depth Detection, Impulse Sound Source, Open-hole Well, Geological Interface, Microscopic Techniques

Abstract

This study which applies sound wave depth detection technology, using the simulation method which establish
the calculation model of geological interface deep detection near the borehole of impulse sound source, deeply
studied the influence of three aspects on the amplitude of reflected wave in open hole wells which are the
emission frequency of impulse sound source, horizontal spacing of geological interface and dip angle of
geological interface. The results show that the impulse source has the advantages of high power, wide frequency
band, controllable and repeatable excitation, which is more conducive to the detection of geological bodies near
wells and can detect more distances. In open hole wells, the optimal emission frequency of impulse source is
4KHz, and the conventional source distance (4m) can meet the logging requirements. The geological interface
with arbitrary dip can be detected by means of the instrument. In this paper, the impulse source is used in open
hole wells, which overcomes the shortcomings of the previous technology, such as the lack of azimuth
resolution, low power of the source and small amplitude of reflected wave, and provides important parameters
for the next step of exploring geological structures and geological bodies around wells with impulse sound
sources.

Published
2020-05-01