Encrypted reconstruction method and system for variable offset VSP shot record

Abstract

The invention provides an encrypted reconstruction method and system for a variable offset VSP shot record. The method includes steps of 1, performing elevation correction and energy balancing on thevariable offset VSP shot record; 2, converting the variable offset VSP shot record subjected to elevation correction and energy balancing to a common-depth shot gathers; 3, performing encrypted reconstruction on the common-depth shot gathers based on a compression sensing method and acquiring encrypted reconstruction shot gathers; 4, re-ranking the encrypted reconstruction shot gathers and acquiring an encrypted reconstruction variable offset VSP shot record. According to the invention, encrypted reconstruction can be performed on the practically collected variable offset VSP shot record simply, a shot record number can be increased, so that data point arrangement in an observation system is more concentrated and more uniform.

Description

technical field [0001] The invention relates to the technical field of VSP exploration acquisition and processing, in particular to a method and system for encryption and reconstruction of variable deviation VSP shot records. Background technique [0002] In seismic exploration, variable deviation VSP data has problems such as few shot points, large shot spacing, high acquisition cost, less coverage times, and low imaging accuracy. At present, through indoor VSP data processing, the encrypted shot records are reconstructed to reduce the shot distance, which can save the acquisition cost, speed up the acquisition cycle, improve the data imaging accuracy, and improve the horizontal resolution of the data; through the encryption and reconstruction of the variable deviation VSP shot records, the fixed Arrange the number of inner guns, increase the number of stacks, and improve the quality of the profile. However, since the encrypted shot records cannot be realized by simple int...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for the encryption and reconstruction of variable deviation VSP shot records, which has the problems of few shot points, large shot spacing, high acquisition cost, few coverage times, and low imaging accuracy in variable deviation VSP data, and its application is recent. The emerging compressed sensing theory proposes a VSP shot record encryption and reconstruction method, which encrypts and reconstructs the actually collected variable-deflection VSP shot records, increases the number of shot records, and makes the data points in the observation system array denser and more uniform

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