Four-dimensional specific resistance cross-hole CT monitoring imaging method based on priori gradient constraint

An imaging method and resistivity technology, applied in the field of four-dimensional resistivity trans-hole CT monitoring imaging based on prior gradient constraints, to achieve the effect of timely evolution of time characteristics and strengthening correlation

Active Publication Date: 2018-12-14
SHANDONG UNIV
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Problems solved by technology

However, when actually monitoring some specific processes, such as groundwater migration, grouting process, etc., people can often prejudge the main direction of its migration, and this prior information is not added to the inversion equation

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  • Four-dimensional specific resistance cross-hole CT monitoring imaging method based on priori gradient constraint
  • Four-dimensional specific resistance cross-hole CT monitoring imaging method based on priori gradient constraint
  • Four-dimensional specific resistance cross-hole CT monitoring imaging method based on priori gradient constraint

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a four-dimensional specific resistance cross-hole CT monitoring imaging method based on priori gradient constraint. Detecting is conducted through multi-element physical geography means, geological structure and environmental state information is determined, and a key monitoring area is divided according to the detecting result; drill holes are laid in the selected key monitoring area according to site conditions, electrodes are laid in the drill holes, and an observation space for four-dimensional cross-hole specific resistance CT is formed; the range of a forward andinversion model is determined in the observation space, and the distance between the electrodes and the grid size of the model constructed through forward and inversion are determined according to theneeded precision and time requirements; a full-space four-dimensional specific resistance cross-hole CT method is carried out for monitoring, and a four-dimensional specific resistance inversion objective function and the inversion equation are constructed; and an initial model of the inversion process is determined with a detected geological structure as guidance, the main moving direction of anobjective body is judged in advance to serve as priori information, inversion iteration is conducted continuously, a set of specific resistance inversion results is obtained, and a specific conductance image of dynamic change of the monitored area is obtained.

Description

technical field [0001] The invention relates to a four-dimensional resistivity trans-hole CT monitoring imaging method based on prior gradient constraints. Background technique [0002] In recent years, the four-dimensional resistivity monitoring method has been widely used in environmental monitoring, engineering construction and hydrogeophysical research and other fields. Cross-hole survey techniques provide higher resolution and depth penetration than surface surveys. The measurement sensor is arranged in the borehole, and the signal does not attenuate with the depth, effectively avoiding the interference of random noise in the work site. The four-dimensional cross-hole resistivity CT monitoring method combines the advantages of cross-hole survey and four-dimensional resistivity tomography technology, and is a good means of fine monitoring. [0003] At present, the research on four-dimensional electrical monitoring has achieved certain results, but there are still the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 刘斌庞永昊刘征宇刘沈华王宁
Owner SHANDONG UNIV
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