Observation system variable-layout design evaluation method and observation system variable-layout design evaluation device based on actual seismic data

Abstract

The invention relates to an observation system variable-layout design evaluation method and an observation system variable-layout design evaluation device based on actual seismic data. The method comprises the following steps: the shot-geophone distance distribution of each surface element is calculated according to a variable-layout observation system of an obstacle in an exploration area; seismic channel set data representing the features of a target layer of the exploration area is selected from actual seismic data of the exploration area, the selected seismic channel set data forms a model super channel set, and the shot-geophone distance of the super channel set is distributed uniformly; a seismic channel with smallest offset distance is extracted from the model super channel set according to the shot-geophone distance for each surface element to obtain channel set data of the surface element; the channel set data of the surface elements is superimposed to obtain a seismic data body of the exploration area; and a seismic profile or horizontal slice is extracted from the seismic data body to analyze shallow seismic data loss and remedy, thus realizing observation system variable-layout design evaluation.

Description

technical field [0001] The invention relates to the technical field of petroleum geophysical prospecting data processing, in particular to a method and device for variable-observation design evaluation of an observation system based on actual seismic data. Background technique [0002] With the rapid development of my country's urbanization and national economy, large-scale buildings, factories and mines, farms, road networks, etc. are increasing year by year, coupled with naturally formed mountains, lakes, etc., in seismic exploration, these areas cannot be deployed shot points And the receiver point is the obstacle area of ​​seismic exploration. Due to these obstacle areas, the shot points and receiver points in seismic exploration cannot be arranged regularly according to the designed observation system, resulting in the lack of shallow layers in the final processed seismic data, which affects the overall understanding of structural blocks and resource evaluation of sags. ...

AI Technical Summary

Problems solved by technology

[0003] The above method is an evaluation method of the observation system based on the number of coverages. Since the number of coverages cannot truly represent the lack of seismic data, especially the missing length and width of shallow seismic data, it is impossible to truly predict the size of the seismic section gap and the imaging effect.

This method is not combined with actual seismic data, and the degree of missing data is often estimated based on experience. The results vary from person to person, and the error is large. Using this method to evaluate the observation system variable design lacks scientific and reasonable basis

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