A method to improve the efficiency and accuracy of the first arrival wave by using the static correction iterative method of the detection point

Abstract

The invention discloses a method for improving first arrival wave picking efficiency and accuracy by a detection point static correction iteration method. The method includes the steps: roughly calculating a reference surface static correction quantity by the aid of automatically picked first arrival; performing detection point static correction on an original single shot record according to the reference surface static correction quantity; manually correcting exceptional points and exceptional sections of a detection point static correction quantity; opening a time window in a single shot again after detection point static correction and manual correction to automatically pick the first arrival; modifying the exceptional points of the first arrival; preprocessing the modified first arrival and manually monitoring residual exceptional points on the single shot after detection point static correction and manual correction; subtracting the detection point static correction quantity and a manual static correction quantity from manually monitored qualified first arrival, and then restoring the first arrival to original data. First arrival wave picking efficiency and accuracy of high-precision three-dimensional seismic data with large original record first arrival boundary shape change and low signal-to-noise ratio can be remarkably improved under near surface complex geologic conditions.

Description

technical field [0001] The invention relates to the technical field of geophysical prospecting measurement information processing, in particular to a method for improving the efficiency and accuracy of first-arrival wave picking by using the iterative method of static correction of detection points. Background technique [0002] With the rapid development of seismic field acquisition production capacity and technology, high-precision exploration projects under complex surface conditions are increasing, and the requirements for seismic data processing are also increasing. Base level static correction is a key link in seismic signal processing, and its accuracy depends on the accuracy of the first arrivals involved in statistics. Therefore, how to pick up the first arrivals accurately and quickly is of great significance. To ensure quality, first arrival picks must be manually monitored. There are many arrays of 3D seismic data, and the workload of manual monitoring is huge....

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a method for improving the efficiency and accuracy of first-arrival wave picking by using the iterative method of static correction of the detection point, which can be used in conjunction with the existing first-arrival automatic picking method, and has a very wide range of applications, and solves the complex surface conditions in actual production The problem that the first arrival wave of the low signal-to-noise ratio recording track cannot be picked up accurately

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