Automatic first break picking method based on edge detection

A technology of automatic picking and boundary detection, applied in seismic signal processing and other directions, which can solve the problems of low accuracy and low efficiency of first arrival wave picking technology.

Inactive Publication Date: 2009-10-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low efficiency and low precision of the existi

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  • Automatic first break picking method based on edge detection
  • Automatic first break picking method based on edge detection
  • Automatic first break picking method based on edge detection

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Embodiment Construction

[0020] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0021] An automatic first-arrival picking method based on boundary detection, mainly based on the first-arrival automatic picking technology based on boundary detection, firstly input the original seismic data, process the seismic data in gray scale, and then use the spatial differential operator to process the seismic data Edge detection is accomplished by convolving the corresponding template with the image; finally, the boundary tracking technology is used to correct the edge detection results, and the first wave of seismic data is automatically picked up, and the picking results are output; the steps for boundary tracking are:

[0022] a. Define the edge point as the starting point,

[0023] b. According to the appropriate algorithm and search mechanism, determine the new boundary point on the basis of finding the boundary point,

[0024] c. Search the whol...

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Abstract

The invention relates to an automatic first break picking method based on edge detection, in particular to an automatic first break picking technology based on edge detection, which comprises the steps of: first, inputting original seismic data and conducting graying processing on the seismic data, and then, carrying out seismic data edge detection by virtue of airspace differential operators and finishing the edge detection by corresponding templates and image convolution, finally, correcting the edge detection results with an edge tracking technology, completing the automatic picking of seismic data of the first break and outputting picking results; a manual selection method is used for selecting an edge point as a starting point; and the edge tracking technology mainly utilizes tracking 'bug' for tracking. When being used for picking up the first break from three-dimensional seismic data, the automatic first break picking technology based on edge detection can reduce time by 7 days to 10 days. Compared with the existing automatic first break picking technology with the accuracy rate of 80 percent, the automatic first break picking technology based on edge detection can realize the accuracy rate of 99 percent.

Description

Technical field: [0001] The invention belongs to the field of seismic data processing, and relates to a method for automatically picking up first arrival waves of seismic data. Background technique: [0002] The existing first-arrival picking is mainly manual picking, but with the deepening of exploration, the data volume of seismic data is increasing, and manual picking of first-arrivals in the 3D work area often takes dozens of working days, which seriously affects the efficiency of processing. Although some first-arrival automatic picking technologies have appeared in recent years, due to inaccurate tracking of first-arrivals, the picking-up accuracy of first-arrivals often fails to meet the requirements. Invention content: [0003] The object of the present invention is to provide an automatic first arrival picking method based on boundary detection to solve the problems of low efficiency and low precision of the existing first arrival picking technology. [0004] The...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 单联瑜尚新民赵胜天
Owner CHINA PETROLEUM & CHEM CORP
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