Earthquake speed automatic pickup method and device

Abstract

The invention discloses an earthquake speed automatic pickup method and device. The method comprises the steps of obtaining a velocity spectrum of a target work area with an earthquake speed to be picked up; specifying a time-seismic velocity pair picked up from a target seismic trace as a reliable time-seismic velocity pair, and searching an energy group in a set time range and a set velocity range from the velocity spectrum by taking the reliable time-seismic velocity pair as a center; and picking up the time-seismic velocity pair from the central position of the searched maximum energy group, and taking the time-seismic velocity pair as the seismic velocity of the seismic trace adjacent to the target seismic trace. According to the invention, on the basis of ensuring the seismic velocity pickup accuracy, the seismic velocity pickup time is reduced, and the seismic velocity pickup efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of exploration geophysics, in particular to a method and device for automatically picking up seismic velocity. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] The correctness of the seismic velocity is related to the subsequent processing effect. In the current conventional seismic data processing, the seismic velocity is usually picked up manually. The manual picking of the seismic velocity can synthesize various information, such as avoiding multiple wave energy clusters. , Combined information such as whether the event is aligned or not to pick up the velocity, the ability to distinguish the velocity is strong, and it has certain flexibility, but there are defects such as low efficiency and too l...

AI Technical Summary

Problems solved by technology

[0003] The correctness of the seismic velocity is related to the subsequent processing effect. In the current conventional seismic data processing, the seismic velocity is usually picked up manually. The manual picking of the seismic velocity can synthesize various information, such as avoiding multiple wave energy clusters. , Combined information such as whether the event is aligned or not to pick up the velocity, the ability to distinguish the velocity is strong, and it has certain flexibility, but there are defects such as low efficiency and too long time-consuming; especially for 3D seismic data, processing personnel need to consume a lot of time time for speed pickup

[0004] With the advancement of seismic processing technology, some scholars use the optimization algorithm and the maximum similarity metric criterion to pick up the velocity, take the layer velocity model as the initial velocity model and disturb it, automatically find the energy group of the velocity spectrum, and then obtain a reasonable velocity model. Strictly speaking, this method is a method of finding energy clusters, not a method of picking up velocity. It is difficult to pick up the correct seismic velocity by this method

Some scholars have studied the automatic picking method of seismic stacking velocity based on deep learning, but the learning process takes too long, and there is no manual intervention or quality monitoring in the middle, which is prone to errors

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