Elastic reverse time migration method based on imaging energy flow vector

Abstract

The invention belongs to the field of exploration geophysics, and relates to an elastic reverse time migration method based on an imaging energy flow vector. The method comprises the following steps:on the basis of an elastic wave forward continuation operator, obtaining an elastic wave mass point vibration velocity vector field at a seismic source end; on the basis of the elastic wave reverse continuation operator, obtaining an elastic wave stress tensor field at a detection end; carrying out dot product operation on the seismic source end mass point vibration velocity vector field and the detection end stress tensor field, and performing constructing to obtain an imaging energy flow vector of each grid node at a check point moment; and imaging the constructed imaging energy flow vectoraccording to the energy flow vector divergence imaging condition to obtain an elastic wave reflection energy imaging result. According to the method, the extraction of the standardized elastic wave reflection energy imaging result is realized from the vectorized elastic wave field, and the obtained imaging result is clear in physical significance; moreover, imaging is carried out only by using theelastic wave mass point vibration velocity vector field at the seismic source end and the elastic wave stress tensor field at the detection end, so that the storage consumption is low and the storageefficiency is high.

Description

technical field [0001] The invention belongs to the field of exploration geophysics, and relates to an elastic reverse time migration method based on imaging energy flow vector. Background technique [0002] The elastic reverse time migration method can use multi-component seismic data for structural imaging of complex earth media. Reasonable imaging conditions, as an important part of the elastic reverse time migration method, can realize scalar imaging results extraction from the elastic wave fields at the source end and receiver end, thereby realizing structural imaging of complex earth media. Among them, the elastic energy cross-correlation imaging condition based on the energy density can extract the elastic wave reflection energy imaging result from the elastic particle vibration velocity-stress vector field, and the physical meaning is clear. However, the elastic energy cross-correlation imaging condition characterized by the particle vibration velocity-stress as an ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of elastic reverse time migration method based on imaging energy flow vector, which can solve the problems of low storage efficiency and poor stability of seabed data processing based on elastic energy cross-correlation imaging conditions, and improve Efficiency of Elastic Energy Reverse Time Migration Imaging Method in Practical Application

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