Wavelet zero-phasing treatment method and device

A processing method and processing device technology, applied in measuring devices, seismic signal processing, geophysical measurement, etc., can solve problems caused by interpreters, lack of uniform standards, lack of stability, etc., and achieve the effect of improving reservoir prediction accuracy

Active Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The degree of phase shift in processing is generally obtained based on processing experience or statistics of regional processing data, lacks stability, and

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  • Wavelet zero-phasing treatment method and device
  • Wavelet zero-phasing treatment method and device

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[0016] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0017] The stacking and migration results of seismic data processing require high vertical resolution, and the corresponding relationship between the seismic reflection isotropic axis and the real reflection information of the formation in terms of energy and phase is accurate. However, the raw data in the field are mixed-phase seismic wavelets, which cannot fully satisfy the assumptions of deconvolution processing. After deconvolution of se...

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Abstract

The invention provides a wavelet zero-phasing treatment method and a device. The method comprises the following steps of 1) for some well-logging record position-contained data volumes among all superimposed or offset seismic data, extracting a wavelet set comprising wavelets having the same amplitude spectrum and diversified in phase spectrum based on a statistics time window; 2) based on the wavelet set, estimating an optimal wavelet; 3) taking the inverse solution of the estimated optimal wavelet as a filtering operator; 4) filtering sampled data among the above superimposed or offset seismic data by using the filtering operator; 5) comparing an obtained filtering result and an obtained logging synthetic record with the existing geological knowledge, and judging whether the phases and the energies of reflecting interfaces are consistent or not; if consistent, adopting the estimated optimal wavelet as a zero-phase seismic wavelet; otherwise, adjusting the statistics time window and repeating the above steps 1) to 5); 6) adopting the inverse solution of the estimated optimal wavelet as the filtering operator and filtering the superimposed or offset seismic data by using the filtering operator so as to obtain zero-phased final superimposed or offset seismic data.

Description

technical field [0001] The present invention relates to the field of geophysical exploration seismic data processing, and more specifically, to a wavelet zero-phase processing method and device Background technique [0002] With the deepening of seismic exploration and development, the requirements for reservoir prediction accuracy are getting higher and higher. In some areas with thin reservoirs or thin interbeds, higher requirements are put forward for the longitudinal resolution of basic seismic data and the degree of correspondence between reflection horizons and real underground reflection information, which is convenient for precise prediction of reservoir locations and efficient development. [0003] Methods for improving longitudinal resolution in seismic data processing generally include pre-stack and post-stack deconvolution processing, spectral whitening processing, inverse Q filter compensation processing, etc. These processing methods can improve the main freque...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/362G01V1/366
Inventor 张印堂徐春梅
Owner CHINA PETROLEUM & CHEM CORP
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