Seismic data processing method and device for keeping kinematics characteristics of seismic wave field

Abstract

The invention provides a seismic data processing method and a device for keeping kinematics characteristics of a seismic wave field. The method comprises the steps as follows: carrying out inversion on a near-surface velocity model according to preliminary wave data; calculating matching static correction values of shot detection points according to fluctuation corresponding relation of the preliminary wave data and field measurement ground surface elevation; carrying out smoothing on the field measurement ground surface elevation and establishing a smooth ground surface elevation model; calculating corresponding terrain static correction values of the shot detection points when the field measurement ground elevation is changed into the smooth ground surface elevation, and combining the terrain static correction values of the shot detection points to carry out small disturbance time shifting processing on seismic data; embedding the near-surface velocity model into a whole velocity model to obtain a shallow velocity model; carrying out depth domain medium-deep velocity modeling based on the smooth ground surface elevation model and the shallow velocity model; establishing a new common imaging point or a common reflection angle set; establishing iteration of the common imaging point or the common reflection angle set to obtain the whole velocity model including shallow and medium-deep velocities; and carrying out prestack depth migration imaging through a prestack depth migration algorithm from the smooth ground surface elevation.

Description

technical field [0001] The invention relates to the field of seismic data processing, in particular to a seismic data processing method and device for maintaining kinematic characteristics of seismic wave field. Background technique [0002] The conventional seismic data processing process is based on the horizontal stacking of multiple coverage events, assuming that the surface and subsurface structures are horizontal, layered, and homogeneous media. For seismic data that do not meet this assumption (such as mountainous terrain), a series of processing methods such as terrain correction, low-velocity zone correction, and reflected wave residual static correction are used to correct it, and finally meet the needs of horizontal stacking. Therefore, terrain correction, low-speed zone correction and reflected wave residual static correction are the core of the routine processing flow. [0003] In the conventional seismic data processing flow, the purpose of topography and low-...

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the embodiments of the present invention is to provide a seismic data processing method and device that maintains the kinematic characteristics of the seismic wave field, so as to solve the problem that the existing seismic data processing flow cannot effectively maintain the kinematic characteristics of the seismic wave field, thereby reducing the seismic data Dealing with Accuracy Issues

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