An Application Method of Imaging Gather

Abstract

The invention provides an application method of an imaging trace gather and belongs to the geophysical exploration seismic data acquisition and processing field. The method includes the following steps that: S1, required seismic data are prepared: input data for an observation system which is not implemented include a seismic acquisition observation system, an underground medium speed model, and the structural form of the target layer to be analyzed or an imaginary layer, and input data for an acquisition system which has already completed acquisition include the seismic acquisition and observation system, the underground medium speed model, the structural form of the target layer to be analyzed or the imaginary layer, and a seismic observation record trace; S2, an imaging trace gather is generated; and S3, the observation system is analyzed and evaluated: the acquisition effect of key points and the acquisition effect of a target interface are evaluated.

Description

technical field [0001] The invention belongs to the field of acquisition and processing of geophysical exploration seismic data, and in particular relates to an application method of imaging gathers. Background technique [0002] In the 1990s, Delft University in the Netherlands, inspired by the wave field propagation operator theory of Professor Berkhout of Van Velhuizen et al., proposed a seismic observation system evaluation method based on double focusing of shot point and receiver point wave field. [0003] The essence of the double-focusing method of the wave field is to simplify the imaging processing process, aiming at the underground target point, through the arrangement of the observations according to the distribution of the shot point and the distribution of the receiver point, the wave field is extended to form the image from the shot point and the receiver point. Focusing wavefields, performing imaging correlation processing on these two focused wavefields, for...

AI Technical Summary

Problems solved by technology

What it uses is the imaging velocity model, the two-way wave simulates the propagation of seismic waves, and reflects the imaging contribution of the observation data with real local imaging, which solves the problem of assumptions and approximations in previous evaluation methods

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