CN211315808U - Oil gas pipeline fault early warning and leakage monitoring system - Google Patents
Oil gas pipeline fault early warning and leakage monitoring system Download PDFInfo
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- CN211315808U CN211315808U CN201922122488.6U CN201922122488U CN211315808U CN 211315808 U CN211315808 U CN 211315808U CN 201922122488 U CN201922122488 U CN 201922122488U CN 211315808 U CN211315808 U CN 211315808U
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Abstract
The utility model relates to an oil gas pipeline trouble early warning and leakage monitoring system. One fiber core in the layer stranded communication optical cable is used as a vibration sensing optical cable, the other two fiber cores of the layer stranded communication optical cable are used as temperature sensing optical cables, the BOTDA stress and temperature monitoring host, the phi-OTDR vibration monitoring host and the comprehensive alarm server are connected through a local area network, and the comprehensive alarm server and the comprehensive monitoring platform are connected through the local area network. The utility model discloses collect stress, temperature, vibration monitoring oil gas pipeline trouble early warning and leakage monitoring system as an organic whole, acquire vibration, temperature and stress information around the oil gas pipeline, realize the early warning of trouble according to the change of stress and vibration to realize leakage monitoring and location according to temperature variation information, realize omnidirectional oil gas pipeline safety precaution and leakage monitoring.
Description
Technical Field
The utility model relates to an optical fiber sensing device technical field, specifically speaking relate to an oil gas pipeline trouble early warning and leakage monitoring system.
Background
Petroleum and natural gas are used as main energy substances and play an important role in national economic development and daily life of people. The oil and gas pipelines are used for conveying oil and natural gas, which is a more convenient, environment-friendly, safe and low-cost transportation mode, and become the most important way of oil and gas transportation. Most of oil gas pipelines are buried underground, so that the monitoring of the oil gas pipelines is very difficult, and meanwhile, the oil gas pipelines face the problems of artificial theft, construction damage, geological disasters, natural environments, oil gas pipeline aging and the like. Early monitoring methods mainly include manual patrol, and then leakage and perforation monitoring methods mainly include a negative pressure wave method, a sound wave method, a mass balance method, a stress wave method, a transient model method and the like. In recent years, distributed optical fiber sensing has the advantages of long sensing distance, distributed measurement, electromagnetic interference resistance, no source of the sensor, intrinsic safety, convenience in arrangement, good environmental adaptability and the like, and thus a brand-new head angle is exposed in the field of oil and gas pipeline monitoring. Distributed vibration sensing technologies, represented by Mach-Zehnder, Sagnac interferometer, phi-OTDR, DAS, have been used in the theft excavation and leakage monitoring of oil and gas pipelines. However, the oil and gas pipeline monitoring means represented by the vibration equipment is mainly used for external force damage of large-scale machinery and vibration events caused by leakage of a large amount of crude oil. However, the vibration system cannot sense the deformation of the oil-gas pipeline caused by soil displacement such as landslide and surface subsidence, and cannot perform early warning on a fault area. In patent CN 209415059 published in 2018, a long-distance oil and gas pipeline leakage monitoring system based on the BOTDA principle is introduced, and the oil and gas pipeline leakage is detected through temperature, so that the early warning of hidden troubles of pipeline deformation caused by geological disasters and the like still cannot be performed.
Disclosure of Invention
An object of the utility model is to solve above-mentioned problem, provide an oil gas pipeline trouble early warning and leakage monitoring system.
In order to solve the above problem, the utility model discloses a technical scheme as follows:
an oil and gas pipeline fault early warning and leakage monitoring system is characterized by comprising an integrated monitoring platform, an integrated warning server, a phi-OTDR vibration monitoring host, a BOTDA stress and temperature monitoring host, a time division multiplexing channel expander, a layer stranded communication optical cable, an oil and gas pipeline, a stress sensing optical cable, a temperature compensation sensing optical cable and a splice closure, wherein one fiber core in the layer stranded communication optical cable is used as the vibration sensing optical cable, the other two fiber cores of the layer stranded communication optical cable are used as the temperature sensing optical cable, the BOTDA stress and temperature monitoring host, the phi-OTDR vibration monitoring host and the integrated warning server are connected through a local area network, and the integrated warning server and the integrated monitoring platform are connected through the local area network;
the phi-OTDR vibration monitoring host is connected with a vibration sensing optical cable;
the BOTDA stress and temperature monitoring host is connected with a time division multiplexing channel expander;
the time division multiplexing channel expander is connected with the stress sensing optical cable, the temperature compensation sensing optical cable and the temperature sensing optical cable.
The stress sensing optical cable is characterized in that a tight sleeve optical cable is respectively arranged in the 3 o ' clock, 9 o ' clock and 12 o ' clock directions of an oil-gas pipeline, the stress sensing optical cable is tightly attached to the oil-gas pipeline through epoxy resin glue, and is in high-strength coupling with the oil-gas pipeline, so that strain information is acquired;
the temperature compensation sensing optical cable adopts a loose optical cable, is laid in the 12 o' clock direction and is pasted on the wall of the pipeline together with the stress sensing optical cable, so that the interference of stress is relieved;
the BOTDA stress and temperature monitoring host monitors six optical fiber links to realize the collection of stress information and temperature information, and the six optical fiber links form three optical fiber loops due to the double-end working mode of the BOTDA: the first loop is formed by connecting two stress sensing optical cables in the directions of 3 o 'clock and 9 o' clock; a stress sensing optical cable of which the loop II is in the 12 o' clock direction is connected with a temperature compensation sensing optical cable; and the third loop is formed by connecting two fiber cores serving as a temperature sensing optical cable in the layer-stranded communication optical cable.
Compared with the prior art, the utility model has the beneficial characteristics that:
the utility model discloses an oil gas pipeline trouble early warning and leakage monitoring system as an organic whole of collection stress, temperature, vibration monitoring acquires vibration, temperature and stress information around the oil gas pipeline, realizes the early warning of trouble according to the change of stress and vibration to realize leakage monitoring and location through temperature variation information, realize omnidirectional oil gas pipeline safety precaution and leakage monitoring, realize the early location and the salvage of trouble, reduce potential safety hazard and economic loss. The distributed optical fiber sensing system has the advantages of long sensing distance, distributed measurement, electromagnetic interference resistance, safety, reliability, convenience in installation, no need of power supply for a circuit, strong expansion capability and the like, and is particularly suitable for fault early warning and leakage monitoring of oil and gas pipelines.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a distributed optical fiber sensing system for monitoring a natural gas pipeline according to an embodiment;
FIG. 2 is a schematic diagram of a distributed optical fiber sensing system for monitoring a petroleum pipeline according to an exemplary embodiment;
FIG. 3 is a schematic diagram of a relationship between a layer stranded cable and a vibration sensing cable and a temperature sensing cable according to an embodiment;
FIG. 4 is a diagram of a layout of a distributed optical fiber sensing optical fiber of a natural gas pipeline according to an embodiment;
FIG. 5 is a diagram of a petroleum pipeline distributed optical fiber sensing fiber layout according to an embodiment.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
An oil and gas pipeline fault early warning and leakage monitoring system comprises an integrated monitoring platform 1, an integrated alarm server 2, a phi-OTDR vibration monitoring host 3, a BOTDA stress and temperature monitoring host 4, a time division multiplexing channel expander 5, a layer stranded communication optical cable 6, an oil and gas pipeline 7, a stress sensing optical cable 8, a temperature compensation sensing optical cable 9 and a splice closure 12, as shown in figure 1. As shown in fig. 2, a BOTDA stress and temperature monitoring host 4, a phi-OTDR vibration monitoring host 3 and an integrated alarm server 2 are connected through a local area network, and the integrated alarm server 2 and an integrated monitoring platform 1 are connected through the local area network;
the comprehensive monitoring platform 1 stores and displays alarm data of data analyzed by the comprehensive alarm server 2, the comprehensive alarm server performs alarm analysis and forwarding according to monitoring data of the BOTDA stress and temperature monitoring host 4 and the phi-OTDR vibration monitoring host 3, GIS information, an alarm list and alarm positioning of an oil-gas pipeline 7 are displayed on the comprehensive monitoring platform 1, and an alarm display function is realized and is issued to related management personnel. The comprehensive alarm server 2 performs comprehensive analysis according to the stress, temperature and vibration test data to realize safety diagnosis, fault early warning and leakage monitoring of the oil and gas pipeline.
The BOTDA stress and temperature monitoring host 4 and the phi-OTDR vibration monitoring host 3 are communicated with the comprehensive alarm server 2 through a TCP/IP protocol.
The BOTDA stress and temperature monitoring host 4 is used for monitoring stress and temperature information of a pipeline, and the phi-OTDR vibration monitoring host 3 is used for monitoring vibration information.
The BOTDA stress and temperature monitoring host monitors six optical fiber links in total and is used for acquiring stress information and temperature information respectively. Due to the double-end working mode of the BOTDA, six optical fiber links form three optical fiber loops. The first loop is formed by connecting a 3 o 'clock cable with two stress sensing optical cables 8 in the 9 o' clock direction; a stress sensing optical cable 8 with a loop II in the 12 o' clock direction is connected with a temperature compensation sensing optical cable 9; and the third loop is formed by connecting two fiber cores serving as the temperature sensor optical cable 11 in the layer-stranded communication optical cable 6. The first loop and the second loop are used for monitoring the stress condition of the pipeline, and the third loop is used for monitoring the temperature change of the soil body.
Wherein, the system for stress information acquisition includes:
the system for measuring the stress of the BOTDA stress and temperature monitoring host comprises: the BOTDA stress and temperature monitoring system comprises a BOTDA stress and temperature monitoring host 4, a time division multiplexing channel expander 5, three stress sensing optical cables 8, a temperature compensation sensing optical cable 9 and a junction box 12.
The laying mode of the stress sensing optical cable is as follows:
the stress sensing optical cable comprises three stress sensing optical cables 8 and a temperature compensation sensing optical cable 9. The three stress sensing optical cables 8 adopt tight-sleeved optical cables and are respectively laid in the directions of 3 o ' clock, 9 o ' clock and 12 o ' clock of the pipeline; the temperature compensation sensing optical cable 9 adopts a loose optical cable, and is laid in the 12 o 'clock direction of the pipeline together with the stress sensing optical fiber 8 in the 12 o' clock direction during laying; the three stress sensing optical cables 8 and the temperature compensation sensing optical cable 9 are adhered to the surface of the pipeline by epoxy resin glue. As shown in fig. 5.
The stress sensing optical cable connection mode is as follows:
the two stress sensing optical cables 8 in the 3 o 'clock and 9 o' clock directions and the stress sensing optical cables 8 in the 12 o 'clock direction and the tail ends of the temperature compensation sensing optical cables 9 are respectively welded in a splicing box 12, the optical fiber joints at the head ends of the two stress sensing optical cables 8 in the 3 o' clock and 9 o 'clock directions are connected with the input and output ends of a first channel of a time division multiplexing channel expander 5, the optical fiber joints at the head ends of the stress sensing optical cables 8 in the 12 o' clock direction and the temperature compensation sensing optical cables 9 are connected with the input and output ends of a second channel of the time division multiplexing channel expander 5, and a BOTDA stress and temperature monitoring host 4 is connected with the time division multiplexing channel expander 5 by adopting optical fiber jumpers to form two sensing loops. Because the BOTDA stress and temperature monitoring host is sensitive to temperature and stress at the same time, the stress data is decoupled by adopting the test data of the temperature compensation sensing optical cable 9, the stress information acquisition of the pipeline is realized, and the fault early warning is carried out according to the data of the stress information.
The stress sensing system can realize multidimensional stress information acquisition of the oil and gas pipeline and early fault early warning of the oil and gas pipeline.
Wherein, be used for temperature sensing system includes:
the system for the BOTDA stress and temperature monitoring host computer to measure the temperature comprises: a BOTDA stress and temperature monitoring host 4, a time division multiplexing channel expander 5, a temperature sensing optical cable 11 and a splice closure 12.
The temperature sensing optical cable is laid in the following way:
as shown in fig. 4, the temperature sensing optical cable 11 is located above the natural gas pipeline 7 when monitoring the same; as shown in fig. 5, the temperature sensing optical cable 11 is located below the petroleum pipeline 7 when monitoring it. The temperature sensing optical cable 11 is two fiber cores of the layer stranded communication optical cable 6, and the arrangement position of the temperature sensing optical cable is the arrangement position of the layer stranded communication optical cable 6.
This embodiment will the utility model is used for among the petroleum pipeline monitoring, because oil is the transportation that heats in the pipeline, so when the oil leaks, the temperature of leak department can be higher than the temperature of the soil body on every side, simultaneously, the temperature of the soil body of leak moment also is higher than the soil body temperature of pipeline normal during operation, through the time domain with the dual false alarm rate of distinguishing the lowering system of space domain. Crude oil can seep towards the underground direction under the action of gravity when petroleum leaks, so that the temperature sensing optical cable 11, namely the layer stranded communication optical cable 6 is buried under the petroleum pipeline in the 6 o' clock direction during the monitoring of the petroleum pipeline. Meanwhile, the protective layer stranded communication optical cable 6 is not in direct contact with an oil and gas pipeline, sand is filled between the oil and gas pipeline and the layer stranded communication optical cable 6, the sand filling thickness is recommended to be 10 cm-20 cm, and the temperature conduction can be facilitated. In the natural gas pipeline monitoring, as the natural gas in the pipeline is generally conveyed at high pressure, once small hole leakage occurs, the temperature of the natural gas pipeline can be rapidly reduced and exchanges heat with soil, and the natural gas pipeline leakage is monitored by monitoring the temperature reduction of the soil. Because the gas quality is lighter, can rise upwards naturally in the place of leaking, consequently, when monitoring natural gas line, temperature sensing optical cable 11 promptly layer stranded communication optical cable 6 should place on natural gas line, is located natural gas line's 12 o' clock directions, for protective layer stranded communication optical cable 6, it should have a certain distance with oil gas pipeline, can promote the speed of gas diffusion through the backfill sand, backfill degree of depth 10~20 cm.
The temperature sensing system is used for monitoring leakage of an oil or natural gas pipeline, leakage monitoring is achieved according to temperature change of surrounding soil, and double judgment is conducted from a time domain and a space domain to reduce the false alarm rate of the system through the temperature difference between the leakage position and the surrounding soil and the temperature difference between the leakage position at the leakage moment and the soil in normal working.
Wherein the vibration sensing system comprises:
the system for the phi-OTDR vibration monitoring host machine to measure vibration comprises: a phi-OTDR vibration monitoring host and a vibration sensing optical cable 10. The vibration sensing optical cable 10 adopts a fiber core of the layer-stranded communication optical cable 6, and a joint of the vibration sensing optical cable 10 close to the monitoring room end is connected into an interface of a phi-OTDR vibration monitoring host.
The BOTDA stress and temperature monitoring host and the phi-OTDR vibration monitoring host upload acquired information to a comprehensive alarm server through a local area network, the comprehensive alarm server receives strain, temperature and vibration data, gives out comprehensive evaluation, carries out fault pre-judgment and alarm, and the comprehensive alarm server is connected with a comprehensive display platform through local area network signals. The comprehensive display platform simultaneously pushes the alarm information to the mobile phones of related personnel according to the alarm information provided by the comprehensive alarm server, so that early processing of faults is realized.
The strain optical cable of the vibration sensing optical cable connected with the phi-OTDR vibration monitoring host is a core of the communication optical cable, so that the acquisition of vibration information is realized, the hidden danger caused by vibration events such as stealing excavation and vehicles is monitored, and the early warning function of faults is realized.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred embodiments of the present invention, and the present invention is not limited by the above preferred embodiments, and various changes and modifications can be made without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the present invention as claimed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. An oil and gas pipeline fault early warning and leakage monitoring system is characterized by comprising an integrated monitoring platform, an integrated warning server, a phi-OTDR vibration monitoring host, a BOTDA stress and temperature monitoring host, a time division multiplexing channel expander, a layer stranded communication optical cable, an oil and gas pipeline, a stress sensing optical cable, a temperature compensation sensing optical cable and a splice closure, wherein one fiber core in the layer stranded communication optical cable is used as the vibration sensing optical cable, the other two fiber cores of the layer stranded communication optical cable are used as the temperature sensing optical cable, the BOTDA stress and temperature monitoring host, the phi-OTDR vibration monitoring host and the integrated warning server are connected through a local area network, and the integrated warning server and the integrated monitoring platform are connected through the local area network;
the phi-OTDR vibration monitoring host is connected with a vibration sensing optical cable;
the BOTDA stress and temperature monitoring host is connected with a time division multiplexing channel expander;
the time division multiplexing channel expander is connected with the stress sensing optical cable, the temperature compensation sensing optical cable and the temperature sensing optical cable.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112697301A (en) * | 2021-01-27 | 2021-04-23 | 南京嘉兆仪器设备有限公司 | Fully-distributed pipeline erosion monitoring system and method based on optical fiber sensing |
| CN112729688A (en) * | 2021-01-12 | 2021-04-30 | 南京大学 | Oil-gas pipeline leakage detection method based on vibration and temperature double parameters |
| CN113669638A (en) * | 2021-08-06 | 2021-11-19 | 西安石油大学 | Petroleum pipeline leakage monitoring device |
| CN113884247A (en) * | 2021-12-09 | 2022-01-04 | 南京派光智慧感知信息技术有限公司 | Comprehensive monitoring system and method for oil and gas pipeline |
| CN114088241A (en) * | 2021-10-21 | 2022-02-25 | 武汉理工大学 | Weak fiber grating array temperature/vibration composite sensing optical cable and use method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729688A (en) * | 2021-01-12 | 2021-04-30 | 南京大学 | Oil-gas pipeline leakage detection method based on vibration and temperature double parameters |
| CN112729688B (en) * | 2021-01-12 | 2022-08-19 | 南京大学 | Oil-gas pipeline leakage detection method based on vibration and temperature double parameters |
| CN112697301A (en) * | 2021-01-27 | 2021-04-23 | 南京嘉兆仪器设备有限公司 | Fully-distributed pipeline erosion monitoring system and method based on optical fiber sensing |
| CN113669638A (en) * | 2021-08-06 | 2021-11-19 | 西安石油大学 | Petroleum pipeline leakage monitoring device |
| CN114088241A (en) * | 2021-10-21 | 2022-02-25 | 武汉理工大学 | Weak fiber grating array temperature/vibration composite sensing optical cable and use method thereof |
| CN113884247A (en) * | 2021-12-09 | 2022-01-04 | 南京派光智慧感知信息技术有限公司 | Comprehensive monitoring system and method for oil and gas pipeline |
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