Phase-control array seismic prospecting method

Abstract

The invention discloses a phased array seismic prospecting method, which adopts a plurality of vibrator sources arranged in a collinear manner at uniform intervals. By controlling the time delay or phase difference of each vibrator, the scanning signals sent by each vibrator are superimposed in the same phase in a certain direction underground, and the vibration signal is strengthened. By changing the time delay and phase difference of each seismic source, the orientation of the seismic beam is realized, making directional seismic exploration possible. The phased array seismic exploration method provides an effective method for seismic exploration of steeply inclined geological bodies, realizes directional seismic exploration, and can also improve the depth and resolution of seismic exploration, and solve the problem that the number of seismic sources in combined earthquakes cannot be limited. Too many questions.

Description

Technical field: [0001] The invention relates to a shallow layer artificial seismic exploration method, which is especially suitable for the seismic exploration environment where multiple vibrators are constructed simultaneously. Background technique: [0002] Assuming that the seismic sources vibrate at the same time, the vibration signals generated by each seismic source propagate underground independently. Due to the distance between the seismic sources, there will inevitably be a wave path difference at any observation point underground, and the phase difference caused by the wave path difference will be Strengthen the signal in some areas and weaken the signal in some areas. In the existing combined seismic exploration of reflection method, several single seismic sources with small output force are combined together to simulate a seismic source with large output force to increase the depth of seismic exploration. Combined seismic exploration refers to several single se...

AI Technical Summary

Problems solved by technology

Combined seismic exploration refers to the simultaneous vibration of several single seismic sources. Although the seismic waves generated by each seismic source can strengthen the seismic wave energy that propagates downward vertically and in the direction of the surface, it cannot generally enhance the seismic wave energy in other directions. Therefore, it is not suitable for the exploration of steeply inclined geological bodies, let alone directional exploration

Furthermore, the number of seismic sources used in combined earthquakes is limited, and generally cannot exceed 4. Too many seismic sources will cause mutual interference of seismic waves during propagation, and the effect will be worse.

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