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A method and system for removing abnormal points in speed picking

A velocity picking and abnormal point technology, applied in the field of seismic exploration data processing, can solve the problem of low removal efficiency of abnormal picking points, achieve efficient and accurate automatic picking function of velocity spectrum, improve processing efficiency, and achieve the effect of small change trend

Active Publication Date: 2021-01-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] In order to solve the problem of low removal efficiency of abnormal points in the results of automatic velocity spectrum picking in seismic data processing, the present invention proposes a method and system for removing abnormal points in velocity picking based on small local velocity variation trends, and realizes automatic abnormal points in velocity versus data Remove, improve the processing efficiency of speed analysis, improve the processing effect of speed analysis

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  • A method and system for removing abnormal points in speed picking
  • A method and system for removing abnormal points in speed picking
  • A method and system for removing abnormal points in speed picking

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Embodiment Construction

[0034] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention 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 invention to those skilled in the art.

[0035] The invention utilizes the rule that the local velocity of the formation is stable and the velocity variation trend is small, and proposes an automatic removal method for the abnormal value of the local velocity pickup point, realizes the automatic abnormal removal processing of the velocity pickup point, and effectively removes the abnormal velocity point in the velocity pickup , which improves the effect of speed picking, liberates manual operation, and significantly improves ...

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Abstract

An abnormal speed picking point removal method and system are disclosed. The method comprises: 1) performing speed pair auto-pickup on the common center point seismic gather data to obtain the speed pair pickup data of a whole work area; 2) setting a local area centering the position of a grid point with the target speed pair based on the grid corresponding to the speed pair pickup data; 3) performing speed function fitting on the data based on all speeds in the local area; 4) removing speed pickup abnormal points based on the fitting speed function value corresponding to each picking point ofthe target speed pair; 5) moving the local area by unit grid and repeating steps 3)-4) until the entire grid is traversed. The invention greatly improves the processing efficiency of speed abnormal pickup point removal, and through combined use with the speed automatic pickup method, an efficient and accurate speed spectrum automatic pickup function is realized.

Description

technical field [0001] The present invention relates to the field of seismic exploration data processing, and more specifically, to a method and system for removing abnormal points in velocity picking. Background technique [0002] Velocity modeling is an important link in seismic data processing, and the accuracy of velocity modeling directly affects the effect of stacking and migration processing. The initial step of velocity modeling is superposition velocity analysis. The quality of superposition velocity analysis directly affects the effect and efficiency of subsequent modeling. A good initial superposition velocity model can significantly reduce the number of iterations of velocity modeling and improve processing efficiency. [0003] The process of conventional superposition velocity analysis is through manual picking velocity pair function. As the scale of seismic exploration data continues to grow, the manual velocity analysis method is time-consuming and laborious,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/28G01V1/30
Inventor 亢永敢赵改善庞世明许自龙杨祥森
Owner CHINA PETROLEUM & CHEM CORP
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