Urban two-dimensional seismic obstacle-crossing observation system optimized geometry-variable design method

Abstract

The present invention discloses an urban two-dimensional seismic obstacle-crossing observation system optimized geometry-variable design method and belongs to the urban geophysical exploration technical field. The invention aims to solve the problem that the influence of an obstacle section on a normal observation system cannot be quickly and efficiently determined in the prior art can be solved. According to the method, received permutations in a single-shot conventional seismic observation system to be processed are divided into at least one effective permutation segment according to positional relationships between the position of each detection point and the range of each of all obstacle segments; and the comprehensive planar graph of the seismic observation system is drawn according to the positions of shot points and the effective permutation segments, and the number of times of coverage of a common midpoint is put into statistics according to the planar graph of the seismic observation system, wherein the number of times of coverage of the common midpoint is the number of times of repeated observation which is formed by identical reflection points on an underground interface which are located between the shot points and the detection points.

Description

technical field [0001] The present invention relates to the technical field of urban geophysical exploration, and more specifically relates to a method for optimizing and variable-observation design of an urban two-dimensional seismic obstacle observation system. Background technique [0002] When performing seismic exploration work, the relative positional relationship between the excitation point and the receiving array is called the seismic observation system. In the process of urban two-dimensional seismic exploration, when the seismic survey line must cross some obstacle survey sections such as rivers, highways, residential alleys, etc., it is necessary to adopt a reasonable change in the observation system design (abbreviated as variable view design) to ensure that the seismic data from the underground The reflected wave event of the interface is continuously tracked. [0003] At present, the variable appearance design usually relies on experienced field production ma...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a method for optimizing the variable view design of the urban two-dimensional seismic obstacle observation system, which is used to solve the problem in the prior art that the influence of the obstacle section on the normal observation system cannot be quickly and efficiently determined

Images