Oil gas pipeline leak intelligent on line monitoring method based on distribution type optical fibre sensor

A distributed optical fiber and sensor technology, applied in optical instrument testing, machine/structural component testing, instruments, etc., can solve the problems of small theft, low positioning accuracy, oil and gas theft, etc.

Inactive Publication Date: 2003-04-30
XI AN JIAOTONG UNIV
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Problems solved by technology

Since the loss of transient negative pressure wave propagation is particularly large, the propagation distance is limited, and the sensitivity of the pressure sensor and flowmeter itself is limited, this method is only suitable for the situation of a large amount of leakage such as pipeline rupture, and has low positioning accuracy, which cann

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  • Oil gas pipeline leak intelligent on line monitoring method based on distribution type optical fibre sensor
  • Oil gas pipeline leak intelligent on line monitoring method based on distribution type optical fibre sensor
  • Oil gas pipeline leak intelligent on line monitoring method based on distribution type optical fibre sensor

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[0024] The principle of the present invention will be further described in detail below in conjunction with the drawings and the embodiments completed by the inventor according to the technical solution, and the present invention is not limited to these embodiments.

[0025] The intelligent online monitoring method for oil and gas pipeline leakage based on distributed optical fiber sensor of the present invention includes the following steps:

[0026] 1) Lay one or several optical cables in parallel with the oil and gas pipelines near the oil and gas pipelines, and use optical fibers as sensors to monitor the oil and gas pipelines in real time;

[0027] 2) At both ends of the optical fiber, that is, the input and output ends of the oil and gas pipeline, a backscattered light detection module 3 and an optical fiber output optical power detection module 4 are provided;

[0028] At one end of the optical fiber, that is, the input end of the optical pulse, set the optical pulse genera...

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Abstract

The present invention discloses an intelligent on-line monitoring method of oil-gas pipeline leak based on distribution type optical fiber sensor. Near the oil gas pipeline, one or several optical cable is set up parallel to the oil gas pipeline and uses the optical fiber as sensor to proceed real-time monitoring of oil-gas pipeline; at two ends of the optical fiber, that is at the inlet end and outlet end of oil-gas pipeline, a set of luminous power detecting module is equipped at each end and is connected with a computer, the computer is used to proceed analysis of data and obtain the characteristic of pressure change and vibration signal around the pipeline, thereby can discover and accurately determine the position of leak of the oil-gas pipeline.

Description

1. Technical field [0001] The invention belongs to the technical field of signal detection and analysis, relates to an online monitoring method, in particular to an intelligent online monitoring method for oil and gas pipeline leakage based on distributed optical fiber sensors. 2. Background technology [0002] At present, there are many monitoring methods for oil and gas pipeline leakage, mainly through the detection of parameters such as flow and pressure at the input and output ends to determine whether the oil and gas pipeline leaks and its location. For example, when an oil and gas pipeline leaks, due to the pressure difference between the inside and outside of the pipeline, the pressure at the leakage site drops rapidly, and a transient negative pressure wave that propagates upstream and downstream will be generated, according to the propagation speed of the negative pressure wave and the time difference between the two ends. Locate the location of the leak and use the...

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Application Information

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IPC IPC(8): F16L58/00F17D3/01F17D5/02G01B11/00G01M11/00
Inventor 蒋庄德王延年赵玉龙任国栋
Owner XI AN JIAOTONG UNIV
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