Vibration distortion suppression system and method based on multi-signal generator cooperative vibrator

Abstract

The invention relates to a system and method for suppressing vibration distortion of a vibroseis based on multi-signal generators in cooperation with a vibrator, including a host computer that uses sensor feedback signals to establish a vibroseis mathematical model through pre-vibration work, and updates the parameters of the vibroseis model in real time; analyzes the vibroseis The total harmonic distortion rate and signal-to-noise ratio in the feedback signal, and calculate the amplitude of the corresponding multiple harmonic components. The main control unit of the lower computer starts the corresponding base frequency signal generator and N auxiliary signal generators, and the N auxiliary signal generators output phase-reversed harmonic signals, thereby offsetting all the harmonic signals in the feedback signal when the base frequency signal generator is working. Contains high-order harmonics to suppress the distortion of the fundamental frequency vibration signal. It solves the problem that it is difficult to output high-quality standard sinusoidal signals because the output vibration signal of the vibrator is affected by the nonlinear effects of mechanical, hydraulic, electromagnetic and other structures. It can effectively suppress the harmonic distortion of the vibration signal of the vibrator.

Description

technical field [0001] The invention belongs to the field of seismic exploration, in particular to a multi-signal generator cooperative seismic controllable [0002] Source vibration distortion suppression system and method. Background technique [0003] Vibroseis is an active source widely used in land oil and gas exploration and other fields, and it is also a generation device for exploration vibration signals. The basic theory of the vibroseis is: use hydraulic, electromagnetic and other driving methods to excite continuous sinusoidal vibration signals with low energy density radiating to the earth; continuous sinusoidal vibration signals form reflection or refraction vibration signals at the interface of different formations; reflection or refraction vibration signals It is picked up by a high-sensitivity detector laid on the surface of the earth to form a recorded signal. Through processing such as cross-correlation between the recorded signal of the geophone and the ...

AI Technical Summary

Problems solved by technology

Although the above-mentioned control system and control algorithm have improved the quality of the vibration signal excited by the vibrator to a certain extent, they are still limited to the excitation control idea of ​​a single signal generator.

However, since a single signal generator can only stimulate a certain sinusoidal signal, the improvement effect is limited

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