Seismic data event detection method based on visual cognition environment suppression and contour combination model

A technology of seismic data and detection methods, applied in the field of seismic exploration, can solve problems such as difficult to solve event processing problems, and achieve the effect of reducing response

Pending Publication Date: 2021-06-25
XI'AN PETROLEUM UNIVERSITY
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  • Application Information

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Problems solved by technology

This method is also affected by noise, space and frequency interference, so it is also difficult to solve complex event processing problems

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  • Seismic data event detection method based on visual cognition environment suppression and contour combination model
  • Seismic data event detection method based on visual cognition environment suppression and contour combination model
  • Seismic data event detection method based on visual cognition environment suppression and contour combination model

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] Events are defined as the connection of phase peaks (peaks or troughs). Event picking is the basis of seismic interpretation and can be used for sequence stratigraphy research, reservoir prediction and reservoir feature extraction. The present invention performs event picking based on pre-stack seismic data. Pre-stack seismic data contains richer information than post-stack seismic data. It has not been stretched and stacked by NMO, and the amplitude and frequency information is not damaged, which can reflect some subtle formation characteristics. , but its disadvantage is low signal-to-noise ratio and large noise. Therefore, the present invention proposes a high-precision event picking method for the low signal-to-noise ratio of pre-stack seismic data, such as Figure 10 shown;

[0043] First, the seismic data are preprocessed, the pr...

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Abstract

The invention discloses a seismic data event detection method of an environment suppression and contour combination model based on visual cognition. The method comprises steps that an event is picked up based on pre-stack seismic data which contains abundant information such as amplitude and frequency, and can reflect a tiny structure of a stratum; firstly, seismic data are preprocessed, wavelet fusion of envelope peak instantaneous frequency and oblique superposition peak instantaneous amplitude of the seismic data is solved, and optimal mass data can be provided to the maximum extent. While the seismic data event contour is enhanced, anisotropy suppression is carried out on environment non-correlation noise, significant extraction of the event target contour is realized, and preparation is made for subsequent seismic interpretation, reservoir prediction and the like. Compared with an isotropic method, the anisotropic environment suppression method adopted by the invention can more accurately detect edge variation.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration, and relates to non-classical receptive field suppression of visual cognition, in particular to a seismic data event detection method based on visual cognition environment suppression and contour combination model. [0002] technical background [0003] Event picking is the basis of seismic interpretation and can be used in sequence stratigraphy research, reservoir prediction and reservoir feature extraction. An event is defined as a line connecting phase peaks (crests or troughs). When interpreting seismic records, events are marked according to the regular occurrence of similarly shaped vibrations. Events can represent seismic waves of different types or formations, and the picked-up results can be used for tomographic imaging and interpretation, and can represent stratigraphic boundaries of different lithologies, that is, sedimentary interfaces, or isochronic stratigraphic boundaries...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G06K9/62
CPCG01V1/288G01V1/28G01V1/282G06F18/25
Inventor 赵静任金昌谢非吴逸凡丁义韩桐桐陈嘉璐
Owner XI'AN PETROLEUM UNIVERSITY
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