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A Method for Automatic Residual Depth Picking

An automatic picking and depth technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve high picking accuracy, improve efficiency and effect.

Active Publication Date: 2017-05-10
北京网格天地软件技术股份有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: combined with the characteristics of the iterative process of tomographic inversion, two different remaining depth picking strategies are provided for the early stage and the late stage respectively, so as to solve the difficulty that the picking efficiency and picking accuracy cannot be taken into account at the same time in the current method

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  • A Method for Automatic Residual Depth Picking
  • A Method for Automatic Residual Depth Picking
  • A Method for Automatic Residual Depth Picking

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Embodiment Construction

[0038] The variation of residual depth with offset is closely related to the scale of offset. When the offset step size is small, the change is finer, and when the scale is large, the change is smoother due to the superposition relationship. Theoretically, this continuous change can be made with the curve Fitting is performed, but when the change is slightly complicated, the determination of the curve itself becomes very difficult. Even if some quadratic curves with fewer parameters are selected, additional work is required to determine the parameters of the curve. In order to further improve the automation level, a cluster of curves can be used to automatically scan the analysis points, superimpose the signal energy on each curve, and select the curve with the largest superimposed energy as the best fitting curve; one step further, it can automatically scan all depth points to construct energy Overlay map, by extracting the features of the energy overlay map, the automatic ...

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Abstract

The invention discloses an automatic pick-up method of residual depth. The automatic pick-up method of the residual depth is characterized by including full-automatic picking based on energy superposed graph, semi-automatic picking based on fixed window fourth-order cumulant estimation and determining of applying time of two pick-up strategies, the full-automatic picking is used in an earlier stage of a travel-time chromatography inversion process, capable of accelerating chromatography iteration speed without manual intervention and suitable for inversion of large scale speed features, the semi-automatic picking is used in a later stage of the travel-time chromatography inversion process, capable of increasing accuracy of residual depth picking with manual intervention and suitable for inversion of fine scale speed features, and the applying time of the two pick-up strategies can be determined through recognition of energy superposed graph features.

Description

technical field [0001] The invention relates to a method for automatically picking up remaining depths in a travel-time tomographic inversion system, and different picking strategies are designed for the early and late stages of the inversion process. Background technique [0002] Travel-time tomography is a kind of tomographic method, which uses the high-frequency approximation theory of rays to simulate the propagation of seismic waves in the ground, and uses the ray travel path and travel time to establish the relationship between observation data and underground depth and velocity. Travel-time tomography includes multiple processes and requires multiple rounds of iterations to invert target features. Residual depth picking is an important link in each round of iterations, and it is a bridge between spatial information and time information. Its picking efficiency and accuracy Sex has a great influence on the overall chromatography efficiency and effect, such as figure 1 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01V1/30G01V1/34
Inventor 张建兴杨钦孟宪海李吉刚
Owner 北京网格天地软件技术股份有限公司
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