A Ghost Wave Suppression Method Based on Boundary Integral Inverse Operator

Abstract

The present invention relates to a ghost wave suppression method based on a boundary integral inverse operator. The method is characterized by comprising the following steps of 1) according to a boundary integral formula of the seismic wave propagation and the seismic depth data, calculating to obtain a boundary integral operator formula of a ghost wave; 2) according to the boundary integral operator formula of the ghost wave obtained in the step 1), utilizing the coupling relation of a ghost wave operator and a suppression ghost wave inverse operator to obtain a calculation formula of the suppression ghost wave inverse operator; 3) according to the calculation formula of the suppression ghost wave inverse operator obtained in the step 2) and the seismic data containing the ghost wave, calculating to obtain the seismic data after the ghost wave suppression. According to the present invention, the seismic data after the ghost wave suppression can be obtained according to the seismic data obtained in different acquisition manners, and a calculation method is high in efficiency, so that the method of the present invention can be widely applied to a marine seismic prospecting process.

Description

technical field [0001] The invention relates to a seismic data processing method in the field of marine seismic exploration, in particular to a ghost wave suppression method based on a boundary integral inverse operator. Background technique [0002] In the process of offshore seismic exploration, due to the influence of ghost waves, in order to obtain lower frequency seismic data in offshore streamer seismic data acquisition, generally a deeper seismic source and a larger streamer sinking depth are used. In order to obtain higher frequency seismic data Generally, a shallower seismic source and a smaller sinking depth of the streamer are used. In order to study the geological conditions of medium-deep reservoirs, the goal of seismic exploration is to obtain target imaging of medium-deep formations and high-resolution seismic data. Therefore, it is necessary to eliminate the influence of ghost waves, so as to achieve the purpose of extending the seismic frequency band and ob...

AI Technical Summary

Problems solved by technology

Aiming at different acquisition methods, a broadband seismic data processing technology that can reduce or eliminate the influence of ghost waves has been proposed, which can obtain more detailed seismic data and high-resolution seismic results sections. However, due to changes in acquisition methods, in many The acquisition cost has been increased to a great extent, and the ghost wave suppression method for the new acquisition method is complex and difficult to process, and cannot be applied to a large number of conventionally acquired seismic data.

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