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Seismic source ghost wave suppression method and system of marine seismic data

A technology of seismic data and source ghost waves, applied in the field of marine geophysical exploration, to achieve the effects of widening the frequency band, making up for the lack of spectrum, and continuous spectrum

Inactive Publication Date: 2020-02-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

That is to say, in the process of processing marine seismic data in the past, only the ghost wave of the receiver is generally suppressed

Method used

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  • Seismic source ghost wave suppression method and system of marine seismic data
  • Seismic source ghost wave suppression method and system of marine seismic data
  • Seismic source ghost wave suppression method and system of marine seismic data

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Embodiment Construction

[0054] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present invention and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0055] Based on wave theory and scattering theory, Yang Jinlong et al. (2017) introduced the ghost wave suppression method of Green's theory in detail

[0056]

[0057] Among them, P(r,r s ,ω) is the seismic wave field, G 0 (r' g ,r,ω) is the Green's function in the background medium. In order to obtain the vertical derivative operator of the geophone. r g ' is the position of the predic...

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Abstract

The invention relates to a seismic source ghost wave suppression method and system of marine seismic data. In ocean seismic exploration, ghost waves suppress the low-frequency and high-frequency energy of seismic data, generate trapped waves, and reduce the frequency bandwidth and resolution of the seismic data. To eliminate influence of the ghost waves and broaden the frequency band, the invention provides a green-theory seismic source ghost wave suppression method and a system for executing the method based on the shot-geophone interchange principle. The method and system are completely driven by data, it is not required to know any information of the underground structure, and the method and system are suitable for complex marine topography and geological conditions. According to the invention, the trap wave effect caused by seismic source ghost waves in seismic data can be effectively eliminated, the frequency spectrum loss is compensated, and the data frequency band width is broadened.

Description

technical field [0001] The invention belongs to the technical field of marine geophysical exploration, and in particular relates to a method and system for suppressing source ghost waves of marine seismic data. Background technique [0002] In marine seismic exploration, due to the existence of sea level, ghost waves will be generated in the excitation and reception links. The existence of ghost waves suppresses the low-frequency energy of seismic reflection signals and creates notch points, which reduces the bandwidth and bandwidth of seismic data. resolution. In order to eliminate the influence of ghost waves and broaden the frequency band to improve signal resolution, Hill et al. (2006) proposed a broadband acquisition technology for up and down cables to suppress ghost waves; Tenghamn et al. Polar characteristics to suppress ghost waves and widen the frequency band; Soubaras (2010) proposed an oblique cable broadband acquisition technology, using the diversity of obliqu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/32
Inventor 杨金龙
Owner CHINA PETROLEUM & CHEM CORP
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