Deconvolution method of multi-path double-spectral domain mixed phase wavelets

A technology of zero-phase wavelet and mixed phase, which is applied in the field of multi-path bispectral domain mixed-phase wavelet deconvolution, can solve the problems of inadvisability and large amount of calculation, and achieve suppressing noise, improving resolution, and improving estimation accuracy Effect

Active Publication Date: 2012-10-03
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

However, these solving methods have a large amount of computation, which is not advisable for massive seismic data processing.

Method used

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  • Deconvolution method of multi-path double-spectral domain mixed phase wavelets
  • Deconvolution method of multi-path double-spectral domain mixed phase wavelets
  • Deconvolution method of multi-path double-spectral domain mixed phase wavelets

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Embodiment Construction

[0057] Embodiments of the invention will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0058] Such as figure 1 As shown, in step S110, n seismic records x(ix, t) are selected from the collected reflection seismic records, where n is an integer greater than 1 and ix=1, 2, . . . , n.

[0059] In step S120, the amplitude spectrum w(f) of the wavelet is determined according to the selected n-channel seismic records. The method of determining the amplitude spectrum w(f) of the wavelet will be described in detail later.

[0060] In step S130, the phase spectrum φ(ω) of the wavelet is determined according to the selected n-channel seismic records. The method of determining the phase spectrum φ(ω) of the wavelet will be described in detail later.

[0061] In step S1...

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Abstract

The invention discloses a deconvolution method of multi-path double spectral domain mixed phase wavelets, comprising the following steps: selecting n earthquake records from the collected seismic records; determining the amplitude spectrum of the wavelet according to the selected n earthquake records; determining the phase spectrum of the wavelet according to the selected n earthquake records; implementing the inverse Fourier transform according to the amplitude spectrum and the phase spectrum of the determined wavelet to obtain the mixed phase wavelet of the time domain; determining the zero phase wavelet which is expected to output according to the amplitude spectrum of the expected output wavelet input by users based on the amplitude spectrum of the determined wavelet; adopting the mixed phase wavelet as input and adopting the zero phase wavelet as output to determine the deconvolution filter through the filter wave matching; and obtaining the earthquake records of which the resolution ratio is improved based on the deconvolution filter and the earthquake records.

Description

technical field [0001] The present invention relates to the field of petroleum exploration seismic data processing, in particular to a multi-path dual-spectrum domain mixed-phase wavelet deconvolution method capable of improving the resolution of seismic data. Background technique [0002] Seismic exploration is an exploration method that uses artificial seismic technology to detect underground structure and lithology. It excites seismic waves near the surface in a certain way to generate vibration signals called seismic wavelets. The seismic wavelets propagate from the source to the ground. After encountering the geological interface, transmission and reflection occur at the interface. The transmitted seismic wavelets The wave continues to propagate downward, while the reflected wavelet propagates upward at the reflection point of the interface, and its strength and polarity depend on the magnitude and sign of the interface reflection coefficient. Reflected wavelets from d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 张华陈爱萍何光明金德刚罗红明曹中林尹陈王珑
Owner BC P INC CHINA NAT PETROLEUM CORP
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