Method and apparatus for generating controllable source scanning signals based on compensation

By performing spectral analysis and compensation calculations on seismic data, target scanning signals are generated, which solves the problem of low resolution of seismic data in complex surface areas, expands the bandwidth, and improves the quality of seismic exploration data.

CN117434589BActive Publication Date: 2026-05-26CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2022-07-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In areas with complex surfaces, certain frequency bands in seismic data are affected by absorption and attenuation in the near-surface medium and complex deep structures, resulting in reduced resolution and hindering seismic data processing.

Method used

By acquiring single-shot seismic record data, performing spectrum analysis, dividing the frequency segments, and performing compensation calculations based on the amplitude distribution of the theoretical scanning spectrum, a target scanning signal is generated. The scanning duration of each frequency segment is compensated to align it with the amplitude of the theoretical scanning spectrum, and then concatenated to generate the target scanning signal.

Benefits of technology

This expands the bandwidth of seismic exploration data, improves the signal-to-noise ratio, and enhances the quality of seismic exploration data, which is beneficial for subsequent processing and analysis.

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Abstract

This disclosure relates to a method and apparatus for generating a controllable source scanning signal based on compensation, which can improve the quality of seismic exploration data. The method includes: acquiring single-shot seismic record data of an exploration area; performing spectral analysis on the single-shot seismic record data to obtain an amplitude-frequency spectrum; dividing the amplitude-frequency spectrum into at least two frequency segments based on the amplitude distribution of the amplitude-frequency spectrum; calculating the compensation for the scanning duration of each frequency segment in the at least two frequency segments based on the amplitude distribution of the theoretical scanning spectrum, obtaining a reference scanning duration for each frequency segment aligned with the amplitude of the theoretical scanning spectrum; determining the target scanning duration for each frequency segment under a preset total scanning duration based on the reference scanning duration; and generating a target scanning signal for the exploration area by concatenating the start and end frequencies of each frequency segment and the corresponding target scanning duration.
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