Method and device for processing consistency of explosive source and vibroseis

By using phase-shift filtering and matched filtering techniques, the differences in phase, frequency, and amplitude between explosive sources and controllable sources are reduced, solving the problem of low signal-to-noise ratio of controllable sources in oil and gas exploration, providing a better data foundation, and improving processing results.

CN122085376APending Publication Date: 2026-05-26CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202411694831.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-25
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Controlled seismic sources have low efficiency in transmitting energy to underground rock formations during oil and gas exploration, resulting in a low signal-to-noise ratio that is difficult to meet exploration requirements, especially for deep targets. Furthermore, existing processing methods fail to effectively consider the differences between surface and underground factors during the propagation of seismic wavelets, leading to unsatisfactory processing results.

Method used

A phase-shift filtering method is used for adaptive data processing. Combined with matched filtering technology, the phase, frequency, and amplitude differences between the explosive source and the controllable source are reduced. The optimal phase-shift filtering parameters are obtained through hybrid superposition and analysis, and matched filtering correction is performed.

Benefits of technology

It improves the phase and frequency consistency of data from different source types, enhances the signal-to-noise ratio, provides better basic data, lays the foundation for subsequent processing and interpretation, reduces the uncertainty caused by human factors, and has a fast calculation speed and simple parameter selection.

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Abstract

The invention relates to the technical field of seismic signal processing, and particularly discloses an explosive source and vibroseis consistency processing method and device, and the method comprises the steps: carrying out the phase-shift filtering processing of vibroseis data, and obtaining the processing data; the processing data and the explosive source data are mixed and superposed to generate a mixed and superposed section; analyzing the mixed stack section and the explosive source data independent stack section to obtain an optimal phase shift filtering parameter; performing matched filtering based on the optimal phase shift filtering parameter to obtain a matched filtering factor; and applying the matched filtering factor to the pre-stack data, and carrying out correction processing on the controllable seismic source wavelet. According to the method, the data adaptivity of phase shift filtering is utilized, seismic data differences caused by different excitation and receiving conditions are considered, the phase difference between two kinds of seismic source data is reduced in a time-varying and space-varying mode, and the controllable seismic source data are further drawn close to explosive seismic source data from the phase, frequency and amplitude in combination with matched filtering; and good basic data is provided for subsequent data processing.
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