A method and device for picking up first arrival waves

Abstract

Embodiments of the present application provide a method and device for picking up first arrival waves. The method includes performing convolution transformation on the collected seismic data to obtain the convolved seismic data; using the collected seismic data and the convoluted seismic data to calculate and obtain the envelope of sampling points in the seismic trace; according to the The envelope of the reference sampling point at the preset position of the sampling point in the seismic trace determines the instantaneous amplitude of the sampling point in the seismic trace; the energy ratio of the sampling point in the seismic trace is calculated by using the instantaneous amplitude of the sampling point in the seismic trace and the preset energy ratio formula; Calculate the difference between the energy ratio of the sampling point in the seismic trace and the energy ratio of a sampling point after the sampling point; compare the absolute value of the difference; use the sampling point corresponding to the largest absolute value as the initial value of the seismic trace The sample point of the wave. Using the technical solution provided by the embodiment of the present application can greatly improve the accuracy of picking up the first wave.

Description

technical field [0001] The invention relates to the technical field of geophysical prospecting data processing, in particular to a method and device for picking up first arrival waves. Background technique [0002] The static correction processing technology in seismic exploration can be used to solve the problem that the change of seismic wave travel time in the near-surface medium affects the reflection wave stacking imaging. In static correction processing technology, first arrival is an important attribute of seismic data. In the process of seismic data processing, usually the attribute of first arrival can be used to solve the problem of static correction of seismic data. When an earthquake occurs, due to the different propagation speeds of various seismic waves, the time of propagation to the observation point is also sequential. The first wave received by the seismic observation point can be called the first arrival wave. [0003] The methods for picking up the fir...

AI Technical Summary

Problems solved by technology

This leads to the fact that when the method of boundary energy detection in the prior art picks up the first wave from the seismic data with a large amount of data and low signal-to-noise ratio, the seismic data itself has a large amount of energy interference information, such as the subsequent wave, etc.

Thereby reducing the accuracy of first arrival wave picking

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