Shale gas fracturing downhole accident early diagnosis and alarm method and device

A technology for early diagnosis and accident, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as high leakage alarm, false alarm delay alarm, etc., to achieve the effect of reducing harm

Active Publication Date: 2018-01-26
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

If the traditional pattern classification method is directly applied to the diagnosis of downhole acc

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  • Shale gas fracturing downhole accident early diagnosis and alarm method and device
  • Shale gas fracturing downhole accident early diagnosis and alarm method and device
  • Shale gas fracturing downhole accident early diagnosis and alarm method and device

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[0052]In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0053] Before implementing the early diagnosis and alarm method for shale gas fracturing downhole accidents in the embodiment of the present application, an accident classifier should be established in advance according to the off-line data of shale gas fracturing downhole, so that the follow-up can be based on the online monitoring of the ...

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Abstract

The embodiments of the present invention provide a shale gas fracturing downhole accident early diagnosis and alarm method and device. The method includes the following steps that: the on-line monitoring data of reference variables which reflect a shale gas fracturing downhole condition are acquired; the time window of the online data is set according to a preset width; the time window is dividedinto a plurality of time segments with the same width, and linear fitting is performed on the online monitoring data in each time segment, so that the linear relationship curve of the online monitoring data in each time segment can be correspondingly obtained; corresponding trend feature primitives are determined according to the slope of the linear relationship curve of each time segment, trend feature vectors are built according to the trend feature primitives; and the trend feature vectors are substituted into a preset accident classifier, so that accident types corresponding to the onlinemonitoring data can be predicted, and corresponding alarm information is sent. With the shale gas fracturing downhole accident early diagnosis and alarm method and device of the embodiments of the present invention adopted, shale gas fracturing downhole accident early diagnosis and alarm can be achieved.

Description

technical field [0001] The present application relates to the technical field of shale gas fracturing downhole accident diagnosis and alarm technology, in particular to an early diagnosis and alarm method and device for shale gas fracturing downhole accidents. Background technique [0002] In recent years, the large-scale fracturing operation mode of shale gas has improved construction efficiency, increased gas production, and reduced fracturing costs. However, the real-time diagnosis and alarm of underground accidents are still not well resolved. At present, at the fracturing construction site, downhole accidents are judged manually based on the change process of the fracturing construction curve on the data acquisition system, but manual analysis will lead to lag and misjudgment in accident diagnosis. Therefore, it is necessary to study the early diagnosis and alarm methods of shale gas downhole accidents. [0003] Although the pattern classification method is widely use...

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/26G06F17/30
Inventor 张来斌胡瑾秋张鑫
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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