Seismic prospecting method between azimuth borehole

Abstract

This invention relates to one well direction earthquake explore method, which comprises the following steps: a, distributing the combination arc sound wave radiators onto emission wells to set at least one receive probe into the receive well; b, changing the work phase control combination arc radiator element combination and exerting the proper excitation to realize down well side wave; c, sending the sound wave by one less threshold angle into certain side wall medium; d, changing incidence angle size and processing scan on earth layer to realize the well layer scan and whole angle measurement; e, each receive probes receive the above sound signals only composed of emission well and common information; f, processing the receive signals of different source distance to realize the sound evalution in the well plane.

Description

Technical field [0001] The invention belongs to the field of applied geophysics and relates to an azimuth cross-well seismic exploration method Background technique [0002] Cross-well seismic exploration technology refers to the arrangement of a sound source in the launch well and the arrangement of several receiving transducers in the adjacent receiving wells. The acoustic signal sent by the launch probe is received by the receiving probe after propagating through the interwell stratum. Move up and down to realize the measurement and evaluation of the formation between wells. Cross-well seismic exploration technology is a kind of formation evaluation technology with high measurement resolution, and it has important application value in the dynamic detection of oil reservoirs in the middle and late stages of oilfield development. In the current cross-well seismic exploration technology, such as figure 1 As shown, the sound source in the launch well uses a sound source with a ra...

AI Technical Summary

Problems solved by technology

For example, if figure 1 As shown, assuming that both the transmitting well and the receiving well are located in the yz plane, the acoustic signal emitted by the transmitting probe will propagate in all directions in the formation next to the transmitting well, and the directivity of the yz plane and the xz plane cannot be controlled

The sound waves propagating in all directions in the interwell formation may become multiple reflected waves, refracted waves or scattered waves and then be received by the receiving probe, making the received signal very complicated

[0003] The use of point sound sources makes the data processing and inversion of cross-well seismic exploration complex and multi-solution, and also restricts its detection distance.

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