Broadband fusion modeling method based on full waveform inversion

A technology of full waveform inversion and modeling method, which is applied in the field of broadband fusion modeling based on full waveform inversion, can solve the problems of FWI data volume processing, etc., achieves rich frequency components, helpful frequency bandwidth and good fidelity Effect

Pending Publication Date: 2021-11-02
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, this patent improved the FWI algorithm by introducing constraints, and did not deal with the shortcomings of the obtained FWI data body.

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  • Broadband fusion modeling method based on full waveform inversion
  • Broadband fusion modeling method based on full waveform inversion
  • Broadband fusion modeling method based on full waveform inversion

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Embodiment Construction

[0048] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0049] In describing the spatial characteristics of underground reservoirs, different geophysical data have different advantages, but also have corresponding defects. For example, seismic interpretation horizons can reflect the lateral changes of structures and have practical geological significance. The disadvantage is that there is only interface information and no volume information; logging data is broadband information with high vertical resolution, but the disadvantage is that it is sparse laterally; The information has stable low-frequency information, but its disadvantages are that its stratigraphic occurrence is inconsistent with the actual seismic data occurrence, the frequency range is narrow, and there are only P-wave data. Therefore, it is...

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Abstract

The invention provides a broadband fusion modeling method based on full waveform inversion. The method comprises the steps of 1 constructing a broadband well building model which accords with the occurrence of seismic data, correcting the stratum occurrence of FWI data in a time-frequency domain, and obtaining the FWI data with the corrected occurrence; 2 according to the frequency change trend of the broadband well building model, compensating medium and high frequency information of occurrence correction FWI data in the time-frequency domain to obtain a broadband fusion three-dimensional longitudinal wave velocity data volume; and 3 according to logging data and a three-parameter empirical relation formula, carrying out hierarchical statistics and fitting on a relation formula between the longitudinal wave speed and the transverse wave speed and a relation formula between the longitudinal wave speed and the density of the research area, and further predicting a three-dimensional transverse wave speed and density data volume by utilizing the broadband fusion three-dimensional longitudinal wave speed data volume. According to the broadband fusion modeling method based on full waveform inversion, stable low-frequency characteristics in the FWI data are reserved, the fidelity is better, and the method has popularization and application values for improving the precision and the fidelity of pre-stack seismic multi-parameter inversion.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a broadband fusion modeling method based on full waveform inversion. Background technique [0002] The discreteness and band-limitation of seismic data determine the multiple solutions of pre-stack seismic inversion, and other prior information (for example, logging data, geological data, velocity spectrum data, etc.) Multi-solution performance improves the accuracy and fidelity of pre-stack seismic inversion. As an important prior information, the inversion initial model determines the accuracy and fidelity of the inversion results to a certain extent, and the construction of an initial model that is highly consistent with the actual situation is helpful to obtain the real underground inversion results. [0003] At present, the methods commonly used in the industry to construct the inversion initial model can be divided into two categories. The first method is to...

Claims

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Application Information

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IPC IPC(8): G01V1/28G01V1/40G06F30/20
CPCG01V1/282G01V1/40G06F30/20G01V2210/665
Inventor 王希萍王玉梅王振涛周子群余鹏代磊苗永康
Owner CHINA PETROLEUM & CHEM CORP
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