Method for realizing minimum phase of vibroseis seismic data zero-phase wavelet

A zero-phase wavelet and seismic data technology, applied in the fields of development, exploitation, and oilfield exploration, can solve problems such as the effect of deconvolution processing

Active Publication Date: 2009-09-30
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Although the result of deconvolution processing can be obtained in this way, the effect of deconvolution processing will be greatly affected

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  • Method for realizing minimum phase of vibroseis seismic data zero-phase wavelet
  • Method for realizing minimum phase of vibroseis seismic data zero-phase wavelet
  • Method for realizing minimum phase of vibroseis seismic data zero-phase wavelet

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Embodiment Construction

[0056] The vibroseis seismic record is the seismic data excited by the vibrator and received by the ground receiver, which is the convolution of the scanning signal of the vibroseis and the reflection coefficient sequence. The autocorrelation of the vibroseis scanning signal is the zero-phase seismic wavelet of the vibrator. The seismic data of the zero-phase wavelet of the vibrator is obtained by autocorrelating the seismic record of the vibrator with the scanning signal of the vibrator, which is the convolution of the zero-phase wavelet of the vibrator and the reflection coefficient sequence, and the excitation of the explosive source, the ground The seismic data received by the geophones have the same meaning and are comparable.

[0057] Before the zero-phase wavelet minimum phase processing of the vibroseis seismic data, the necessary autocorrelation processing has been performed on the vibroseis seismic records, and the seismic data is already the vibroseis seismic data o...

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Abstract

The invention relates to the technologies of prospecting, development and exploration in an oil field, in particular to a method for realizing the minimum phase of a vibroseis seismic data zero-phase wavelet, which can provide a high-resolution seismic pattern. The realizing steps are as follows: seismic data is processed and transformed into vibroseis zero-phase wavelet seismic data, a vibroseis zero-phase wavelet and an autocorrelation function are calculated, an inverse filter factor is solved, phase-only factor, calibration factor and phase transformation factor are calculated, the phase transformation factor is used for transforming the zero-phase wavelet into a minimum-phase wavelet, and a phase-corrected seismic data section plane is drawn by corrected seismic data. The method can effectively transform the vibroseis zero-phase wavelet seismic data into the minimum-phase seismic data by a common seismic data processing system, thereby providing necessary input seismic data for seismic data processings such as deconvolution, and the like.

Description

technical field [0001] The invention relates to oil field exploration, development and production technology, in particular to a zero-phase wavelet minimum phase method of vibroseis seismic data to provide high-resolution seismic graphics for reflecting underground formation layers and oil reservoirs. Background technique [0002] The process of seismic exploration is to artificially excite seismic waves at a series of points on the ground, and the seismic waves propagate underground. When the wave impedance of the upper and lower strata is not equal), the seismic wave reflects on the wave impedance interface, the direction of seismic wave propagation changes, and the seismic wave begins to propagate upward. Receivers are placed on a series of receiving points on the ground to receive the upwardly propagating seismic wave data to complete field exploration. When the artificially excited seismic wave is excited by a vibrator, the vibroseis excitation instrument excites and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/32G01V1/40
Inventor 高少武赵波周兴元杜书奎
Owner BC P INC CHINA NAT PETROLEUM CORP
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