CN114577412A - Oil gas leakage monitoring system - Google Patents
Oil gas leakage monitoring system Download PDFInfo
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- CN114577412A CN114577412A CN202011392385.2A CN202011392385A CN114577412A CN 114577412 A CN114577412 A CN 114577412A CN 202011392385 A CN202011392385 A CN 202011392385A CN 114577412 A CN114577412 A CN 114577412A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 107
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000011148 porous material Substances 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 7
- 239000003673 groundwater Substances 0.000 claims description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 23
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- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2846—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for tubes
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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- Environmental & Geological Engineering (AREA)
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- Examining Or Testing Airtightness (AREA)
Abstract
The application discloses oil gas leakage monitoring system belongs to oil gas leakage monitoring technical field. Oil gas leakage monitoring system includes: the system comprises an underground water monitoring well, a combustible gas detector and an alarm controller. The combustible gas detector is in communication connection with the alarm controller. The underground water monitoring well comprises a well pipe, a derrick and an explosion-proof well lid, wherein the side wall of the well pipe is provided with a pore area, the bottom of the well pipe is provided with a bottom seal, the derrick is arranged around a well head of the well pipe, the explosion-proof well lid is arranged on the derrick, the explosion-proof well lid is matched with the derrick to form a closed space, and the well head of the well pipe is positioned in the closed space. The combustible gas detector is used for detecting the concentration of combustible gas in the well pipe. The alarm controller is used for sending out an alarm signal when the concentration of the combustible gas in the well pipe reaches a first threshold value. The oil gas leakage monitoring system can detect the oil gas leakage condition of a leakage source in soil, and enriches the monitoring mode of oil gas leakage.
Description
Technical Field
The application relates to the technical field of oil gas leakage monitoring, in particular to an oil gas leakage monitoring system.
Background
In the production and storage processes of oil gas, oil gas leakage can be caused by construction defects, corrosion in equipment or unqualified equipment quality and the like. The oil gas leakage mainly occurs at the positions of the oil storage tank area, the process area, the pump shed, the valve group area, the oil mixing processing area, the flange joint of the oil-containing sewage processing area and the like. Leaking hydrocarbons can corrode equipment involved in the above-mentioned locations, which will further promote hydrocarbon leakage. Once the oil gas leakage accident happens, great potential safety hazard is brought, and meanwhile uncontrollable pollution is caused to the ecological environment. Therefore, the parts which are easy to leak oil gas need to be monitored in real time, and further timely processing can be carried out according to the oil gas leakage condition.
Currently, combustible gas detectors are typically provided in areas where leakage sources, which are prone to oil and gas leakage, are located. A combustible gas detector is typically fixedly positioned in the area of the source of the leak for detecting the concentration of combustible gas in the air in the area. And when the concentration of the combustible gas in the air in the area is detected to be greater than the preset concentration, indicating that the oil gas leakage occurs in the leakage source.
However, the combustible gas detector can only detect the concentration of oil gas in air in the region where the leakage source is located, but cannot detect the leakage source in soil, and the limitation is high.
Disclosure of Invention
The application provides an oil gas leakage monitoring system can solve the problem that the oil gas of leaking the leakage source in the unable detection soil leaks among the correlation technique. The technical scheme is as follows:
there is provided a hydrocarbon leak monitoring system comprising: the system comprises an underground water monitoring well, a combustible gas detector and an alarm controller, wherein the combustible gas detector is in communication connection with the alarm controller;
the underground water monitoring well comprises a well pipe, a derrick and an explosion-proof well cover, wherein the side wall of the well pipe is provided with a fine hole area, the bottom of the well pipe is provided with a bottom seal, the derrick is arranged around a well head of the well pipe, the explosion-proof well cover is arranged on the derrick, the explosion-proof well cover is matched with the derrick to form a closed space, and the well head of the well pipe is positioned in the closed space;
the combustible gas detector is used for detecting the concentration of combustible gas in the well pipe;
the alarm controller is used for sending out an alarm signal when the concentration of the combustible gas in the well pipe reaches a first threshold value.
Optionally, the explosion-proof well lid is made of a resin material.
Optionally, the combustible gas detector is disposed at a wellhead of the well tubular.
Optionally, the combustible gas detector comprises one or more of a diesel detector, a gasoline detector or an oil film detector.
Optionally, the well casing has a bottom seal, the outside of well casing has filter material section, quartz sand section, clay section and cement section from the bottom up set gradually, the well casing includes sedimentation tube, filter tube and casing pipe that connect gradually from the bottom up, the pore zone is located filter material section with the quartz sand section.
Optionally, the pore region has an open porosity ranging from 60% to 80%.
Optionally, the length of the fine pore region ranges from 4 to 18 meters.
Optionally, the combustible gas detector is connected with the alarm controller through a cable;
the combustible gas detector is used for converting the detected combustible gas concentration into an electric signal and transmitting the electric signal to the alarm controller through the cable, and the strength of the electric signal is positively correlated with the combustible gas concentration;
the alarm controller is used for sending the alarm signal when the intensity of the electric signal received by the cable reaches a second threshold value.
Optionally, the groundwater monitoring well is located downstream of a target leak source.
Optionally, the hydrocarbon leakage monitoring system further comprises: the station control platform is in communication connection with the alarm controller;
the alarm controller is further used for sending an alarm signal to the station control platform when the concentration of the combustible gas in the well pipe reaches the first threshold value.
The beneficial effect that technical scheme that this application provided brought includes:
the underground water monitoring well is arranged in soil to collect leaked oil gas, the combustible gas detector is arranged at a well mouth of a well pipe of the underground water monitoring well to detect the concentration of combustible gas in the well pipe of the underground water monitoring well, the combustible gas detector sends the detected concentration of the combustible gas to the alarm controller, the alarm controller sends out an alarm signal when the concentration of the combustible gas is larger than a first threshold value, and real-time monitoring of the oil gas leakage condition of a target leakage source is achieved. When the concentration of the combustible gas is greater than the first threshold value, the alarm controller can also send an alarm signal to the station control platform to prompt maintenance personnel that the target leakage source is leaked, so that the subsequent treatment efficiency can be improved. In addition, the groundwater monitoring well among the oil gas leakage monitoring system can set up in soil and the explosion-proof well lid of this groundwater monitoring well cooperation derrick of this groundwater monitoring well can form the enclosure space, compares with the correlation technique, and this oil gas leakage monitoring system can detect the oil gas leakage condition of leaking the leakage source in the soil to this oil gas leakage monitoring system receives external influence little, makes the reliability of having improved the detection when richening the monitoring mode of oil gas leakage.
Drawings
FIG. 1 is a schematic structural diagram of an oil and gas leakage monitoring system provided by an embodiment of the present application;
FIG. 2 is a schematic view of a well tubular according to an embodiment of the present application;
FIG. 3 is a schematic view of another well tubular configuration provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another hydrocarbon leakage monitoring system provided by an embodiment of the present application;
FIG. 5 is a schematic structural diagram of another oil and gas leakage monitoring system provided by the embodiment of the application;
FIG. 6 is a schematic structural diagram of another oil and gas leakage monitoring system provided in the embodiments of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of an oil and gas leakage monitoring system provided by an embodiment of the application. As shown in fig. 1, the hydrocarbon leakage monitoring system includes: a groundwater monitoring well 10, a combustible gas detector 20 and an alarm controller 30. Wherein, the combustible gas detector 20 is in communication connection with the alarm controller 30. Optionally, the combustible gas detector 20 and the alarm controller 30 are connected by a cable 40.
The cable in the embodiment of the application is a special cable, and the quality of the cable and the installation quality of the cable should be guaranteed in the actual use process.
Optionally, the groundwater monitoring well 10 is located downstream of a target leak source. Wherein the target leakage source is a leakage source located under soil. The underground water monitoring well 10 should be set in consideration of the conditions of the devices installed around the target leakage source, the distribution of unit buildings (structures), the pollution prevention, the sensitivity of the underground water environment, the aquifer and the potential pollution source, and in consideration of the topography and the soil (such as the low topography, the filling in the soil or the underground river under the soil) so as to ensure that the underground water monitoring well 10 is set in the oil and gas leakage area after the leakage of the target leakage source, so that the underground water monitoring well 10 can collect the oil and gas leaked by the target leakage source.
In the embodiment of the application, the underground water monitoring well is positioned at the downstream of the target leakage source, and can effectively collect oil gas leaked by the target leakage source.
The well depth of the groundwater monitoring well 10 is determined based on the properties of the aquifer where the target leakage source is located, and the specific determination method is as follows (the position where the lowest end of the groundwater monitoring well 10 is located is explained):
in the first case, when the aquifer where the target leakage source is located is the phreatic layer and the thickness of the aquifer is less than or equal to 30 meters, the lowest end of the groundwater monitoring well 10 should be located 12 meters below the known lowest groundwater level and should not be lower than the lower end of the water-barrier roof below the phreatic layer.
In the second case, when the aquifer where the target leakage source is located is a confined water layer and the thickness of the confined water layer is less than or equal to 10 meters, the lowest end of the groundwater monitoring well 10 is located at a position lower than the lowest end of the confined water layer.
In the third case, when the aquifer where the target leakage source is located is a confined water layer and the thickness of the confined water layer is greater than 10 meters, the lowest end of the groundwater monitoring well 10 is located 10 meters below the top plate of the confined water layer.
In the fourth case, the depth of water in the underground water monitoring well 10 should be greater than 12 meters given the maximum groundwater level burial depth.
Referring to fig. 1, the groundwater monitoring well 10 comprises a well pipe 101, a derrick 102 and an explosion-proof well cover 103, wherein the side wall of the well pipe 101 is provided with a fine hole area, the bottom of the well pipe 101 is provided with a bottom seal 104, the derrick 102 is arranged around the wellhead of the well pipe 101, the explosion-proof well cover 103 is arranged on the derrick 102, the explosion-proof well cover 103 forms a closed space together with the derrick 102, and the wellhead of the well pipe 101 is positioned in the closed space.
In this application embodiment, the explosion-proof well lid of groundwater monitoring well cooperation this explosion-proof well lid's derrick forms the enclosure space, can prevent that oil gas from volatilizing to the external world for the detection ring border that oil gas leaked receives external influence lessly, and then has improved the detection reliability that the oil leaked.
Alternatively, the final hole diameter of the groundwater monitoring well 10 is greater than or equal to 108 mm, and the opening hole diameter of the groundwater monitoring well 10 is determined according to requirements of well section diameter variation, well pipe type, filling thickness of soil and the like, and is greater than or equal to 250 mm.
Optionally, the well tubular 101 has a bottom seal 104. The outside of the well pipe 101 is provided with a filter material section 105, a quartz sand section 106, a clay section 107 and a cement section 108 from bottom to top in sequence. The filtering material section 105 is used for filtering suspended particle impurities in the oil-water mixture. The quartz sand section 106 is used for intercepting, filtering and intercepting impurities such as silt in the oil-water mixture. The clay section 107 is used to prevent collapse in the well and to prevent loss of water from the well. The cement section 108 is used to prevent surface water or water adjacent to the formation from entering and acting as a cementing function.
Alternatively, the well pipe 101 should be made of a material that is non-polluting, corrosion resistant and non-toxic, and the material of the well pipe is selected according to the well depth of the groundwater monitoring well 10. Alternatively, the material of the well pipe 101 is rigid polyvinyl chloride (PVC-U), resin, or stainless steel.
Optionally, the material of the bottom seal 104 is PVC-U, stainless steel or cement.
Optionally, the filter media segment 105 is packed with natural quartz sand.
Alternatively, the silica sand section 106 is packed with fine silica sand having a size of 0.1 mm to 0.2 mm.
Optionally, the clay section 107 is filled with clay balls and/or bentonite.
Optionally, the casing 101 comprises a settling pipe 1011, a filtering pipe 1012 and a casing pipe 1013 connected in series from bottom to top, and the fine pore areas on the side wall of the casing 101 are located at least in the filter section 105 and the silica sand section 106.
Alternatively, the type of filter tube 1012 may be a wire wrapped filter tube or a mesh-wrapped filter tube. The type of the filtering pipe 1012 can be determined according to the groundwater type of an aquifer where a target leakage source is located and the lithology around the aquifer, and the filtering pipe should meet the relevant requirements of the existing national standard water supply well technical specification GB 50296.
The aquifer penetrated by the groundwater monitoring well 10 is completely provided with the filtering pipe 1012, the bottom of the filtering pipe 1012 is at least 12 meters lower than the groundwater level, and the length of the well wall pipe 1013 is more than 2 meters. Wherein, the ground water level refers to a diving place and can be obtained through measurement.
The design of the well depth of the groundwater monitoring well 10, the ending well diameter and the opening well diameter of the groundwater monitoring well 10, the type of the filtering pipe 1012 and the length of the type of the filtering pipe 1012 also should meet the design principles in the technical specification of groundwater monitoring engineering (GB/T51040-2014) and the technical guide for groundwater environment monitoring well construction. In order to ensure that leaked oil gas can enter the underground water monitoring well 10 at the first time, the bottommost end of the underground water monitoring well 10 should be lower than the water level in the dry season, and then the oil gas leakage monitoring system can be used for effectively monitoring the oil gas leakage condition all the year round.
Optionally, with continued reference to figure 1, the lower end of the wellbore tubular 101 is in contact with the bottom seal 104, and the sides of the wellbore tubular 101 are in contact with the filter section 105, the silica sand section 106, the clay section 107, and the cement section 108. The casing 1013 is in contact with a filter material section 105, a quartz sand section 106, a clay section 107, and a cement section 108. The filter tube 1012 is lower than the filter material section 105 and contacts the filter material section 105 for passing the oil-water mixture and preventing the inflow of particles of the surrounding soil or rock. The settling pipe 1011 is in contact with the bottom seal 104 and the filtering material section 105, and is used for storing impurities settled by the self-gravity in the oil-water mixture. The side wall of casing 1013 that contacts filter material section 105 and quartz sand section 106, the side wall of settling tube 1011, and the side wall of filter tube 1012 are provided with fine holes.
In the embodiment of the application, whether oil gas leakage occurs in the target leakage source is monitored by installing the underground water monitoring well near the target leakage source in the soil. Because the lateral wall of well casing is provided with the pore region, can get into in this well casing through the oil water mixture of filter material section and quartz sand section through the pore region, oil water mixture can form the layering of oil reservoir, water layer and impurity layer because of the reason of self gravity, and the impurity layer deposits the impurity in the sedimentation tube promptly. Because the oil layer has volatility, the oil layer can volatilize into the well wall pipe. Therefore, whether the target leakage source has oil gas leakage or not can be judged by detecting the concentration of combustible gas in the well casing.
Optionally, the open porosity of the fine pore region ranges from 60% to 80%.
Optionally, the length of the fine pore region ranges from 4 to 18 meters.
Optionally, the pore shape of the pore region comprises at least one of a circle, a triangle, a rectangle, a diamond, a hexagon, an octagon, or an irregular pattern.
Illustratively, fig. 2 is a side expanded view of a pore region of a well tubular according to an embodiment of the present disclosure. As shown in fig. 2, the length of the fine pore zone is 8 meters, the fine pores on the side wall of the well casing are triangular, and each row and each column are arranged at equal intervals, so that the stable structure of the well casing can be ensured on the basis of underground water and oil gas.
By way of further example, FIG. 3 is a side expanded view of a pore zone of another well tubular provided by an embodiment of the present application. As shown in fig. 3, the length of the fine pore region was 12 m, and the fine pores on the side wall of the well casing were hexagonal and arranged at equal intervals in each row and each column.
Optionally, the length of the well pipe 101 is the same as the well depth of the groundwater monitoring well 10, or the length of the well pipe 101 is greater than the well depth of the groundwater monitoring well 10.
Optionally, a combustible gas detector 20 is provided at the wellhead of the well tubular 101. The explosion-proof well lid 103 may be in contact with the well pipe 101, or the explosion-proof well lid 103 may not be in contact with the well pipe 101. When the explosion-proof well cover 103 is contacted with the wellhead of the well pipe 101, the explosion-proof well cover 103 is matched with the well pipe 101 to form a closed space. When the explosion-proof well cover 103 is not in contact with the wellhead of the well pipe 101, the explosion-proof well cover 103 is matched with the derrick 102 to form a closed space.
Alternatively, referring to fig. 1, the combustible gas detector 20 may be suspended from the explosion-proof manhole cover 103; alternatively, referring to FIG. 4, the combustible gas detector 20 may be placed on a platform on which the derrick 102 is located; still alternatively, referring to FIG. 5, the combustible gas detector 20 may be fixedly disposed on the wall of the well casing. The combustible gas detector can be arranged at any position in the closed space formed by the explosion-proof well cover 103 and the derrick 102, and the arrangement position of the combustible gas detector is not limited in the embodiment of the application.
In the embodiment of the application, the explosion-proof well lid forms the enclosure space with the derrick cooperation and can prevent that the oil gas in the well casing from being diluted by external air, and can also reduce the potential safety hazard brought when combustible gas concentration is higher.
Optionally, a passage for passing a cable, i.e. a cable passage, is buried between the derrick 102 and the cement section 108 of the groundwater monitoring well 10. A cable 40 may be connected through the cable passage to the combustible gas detector 20 located in the groundwater monitoring well 10 and to the alarm controller 30 located outside the groundwater monitoring well 10.
Alternatively, the explosion-proof well cover 103 is made of a resin material.
The combustible gas detector 20 is used to detect the concentration of combustible gas in the well pipe 101. The alarm controller 30 may be an alarm display for displaying the concentration value of the combustible gas in the well pipe 101 in real time.
Optionally, the combustible gas detector 20 is adapted to convert the detected combustible gas concentration into an electrical signal and transmit the electrical signal to the alarm controller 30 via the cable 40. The intensity of the electric signal is positively correlated with the concentration of the combustible gas. That is, the higher the combustible gas concentration detected by the combustible gas detector 20, the greater the intensity of the electric signal flowing through the cable 40.
Illustratively, the combustible gas detector 20 converts the detected combustible gas concentration into a current signal and transmits the current signal to the alarm controller 30 through the cable 40. The higher the combustible gas concentration, the greater the signal strength of the current flowing through the cable 40, i.e., the greater the current value.
The alarm controller 30 is configured to issue an alarm signal when the concentration of combustible gas in the well pipe 101 reaches a first threshold value. The first threshold may be preset, and the first threshold is a combustible gas concentration threshold. When the concentration value of the combustible gas in the well pipe 101 is detected to be smaller than the first threshold value, the alarm controller 30 does not send out an alarm signal; when the value of the combustible gas concentration in the well pipe 101 is detected to be greater than or equal to the first threshold value, the alarm controller 30 issues an alarm signal.
Optionally, alarm controller 30 is configured to issue an alarm signal when the strength of the electrical signal received via cable 40 reaches a second threshold. The second threshold may be preset, and the second threshold is an electrical signal intensity threshold. When the strength value of the electric signal converted from the combustible gas concentration in the well pipe 101 is detected to be smaller than the second threshold value, the alarm controller 30 does not send out an alarm signal; when it is detected that the value of the intensity of the electric signal converted from the concentration of the combustible gas in the well pipe 101 is greater than or equal to the second threshold value, the alarm controller 30 issues an alarm signal.
Illustratively, the electrical signal received by the alarm controller via the cable is a current signal. When the received current value is larger than the set current threshold value, the alarm controller sends out an alarm signal.
Alternatively, the alarm controller 30 is installed in a duty room with a duty person on duty, and the duty person can check the combustible gas concentration value in the well pipe 101 displayed by the alarm controller 30 in real time.
Optionally, the combustible gas detector 20 is a pump-storage self-priming combustible gas detector. The combustible gas detector 20 can rapidly collect the gas in the well pipe 101 by using a built-in pump and detect the concentration of the combustible gas in the gas.
Optionally, the combustible gas detector 20 includes one or more of a diesel detector, a gasoline detector, or an oil film detector. The diesel detector can detect the concentration of diesel gas in the air in the well pipe 101. The gasoline detector can detect the concentration of gasoline gas in the air in the well pipe 101. The oil film detector can detect the concentration of diesel gas, gasoline gas, or the like in the air in the well pipe 101.
In the embodiment of the application, different types of combustible gas detectors can be arranged according to the type of oil gas to detect the combustible gas concentration of the oil gas of the corresponding type; alternatively, a combustible gas detector capable of detecting various types of oil gas can be arranged to detect the combustible gas concentration of various types of oil gas; or, a plurality of combustible gas detectors can be arranged to detect the combustible gas concentration of different types of oil gas respectively.
Optionally, fig. 6 is a schematic structural diagram of another oil and gas leakage monitoring system provided in the embodiment of the present application. As shown in fig. 6, the hydrocarbon leakage monitoring system includes: the system comprises a groundwater monitoring well 10, a combustible gas detector 20, an alarm controller 30 and a station control platform 50, wherein the station control platform 50 is in communication connection with the alarm controller 30. The wellhead of a well pipe 101 of the underground water monitoring well 10 is not in contact with the explosion-proof well cover 103, the combustible gas detector 20 is hung on the explosion-proof well cover 103, and the combustible gas detector 20 is connected with the alarm controller 30 through a cable 40.
Optionally, the station control platform 50 is connected to the alarm controller 30 by a cable 60.
Optionally, the alarm controller 30 is configured to send an alarm signal to the station platform 50 when the combustible gas concentration in the well tubular 101 reaches a first threshold. That is, when the detected combustible gas concentration in the well pipe 101 is equal to or higher than the first threshold value, the alarm controller sends an alarm signal and transmits the alarm signal to the station control platform 50 through the cable 60.
Optionally, the alarm controller 30 is configured to send an alarm signal to the station control platform 50 via the cable 60 when the strength of the electrical signal received via the cable 40 reaches a first threshold value. That is, when it is detected that the intensity of the electrical signal converted from the combustible gas concentration in the well pipe 101 is greater than or equal to the second threshold value, the alarm controller 30 issues an alarm signal and transmits the alarm signal to the station control platform 50 through the cable 60.
Optionally, the station control platform 50 is installed in a control center. After receiving the alarm signal, the station control platform 50 may display related alarm information. Such as the location of groundwater monitoring wells 10 communicatively connected to alarm controller 30. The maintenance personnel of the control center can judge the target leakage source of oil gas leakage according to the related alarm information.
In this application embodiment, the alarm signal that alarm controller sent can be received to the accuse platform of standing to show alarm information, maintenance personal can confirm the target according to alarm information and leak the source, and then can in time handle the oil gas leakage condition, fall to minimumly with environmental pollution and fire explosion risk etc..
The working principle of the oil gas leakage monitoring system provided by the embodiment of the application is as follows: when oil gas leakage occurs in underground equipment, the leaked oil gas can permeate into soil and the pollution range is expanded through underground water systems, underground rivers and the like; because the underground water monitoring well is positioned at the downstream of a target leakage source, leaked oil gas can enter the underground water monitoring well at the first time, namely, the leaked oil gas enters a well pipe in the underground water monitoring well through a fine hole area of a well pipe after passing through a filter material section and a quartz sand section in the underground water monitoring well; an oil layer in the oil-water mixture volatilizes into a well wall pipe to form combustible gas, a combustible gas detector detects the concentration of the combustible gas in the well wall pipe, converts a combustible gas concentration signal into an electric signal, and transmits the electric signal to an alarm controller connected with the cable through the cable; when the intensity of the electric signal received by the alarm controller is greater than the second threshold value, an alarm signal is sent out, the alarm signal is transmitted to the station control platform connected with the cable through the cable, and at the moment, a maintenance worker can determine a target leakage source according to alarm information displayed by the station control platform, so that the oil gas leakage condition can be timely processed.
To sum up, the oil gas leakage monitoring system that this application provided collects the oil gas of leaking through setting up the groundwater monitoring well in soil, sets up the combustible gas detector through the well head of the well casing at the groundwater monitoring well and detects the combustible gas concentration in the well casing of this groundwater monitoring well, and the combustible gas detector sends the combustible gas concentration that detects to alarm controller via the cable, and alarm controller sends alarm signal when combustible gas concentration is greater than first threshold value, has realized the real-time supervision to the oil gas leakage condition of target leakage source. When the concentration of the combustible gas is larger than the first threshold value, the alarm controller can also send an alarm signal to the station control platform to prompt maintenance personnel that the target leakage source is leaked, so that the subsequent treatment efficiency can be improved. In addition, the groundwater monitoring well among the oil gas leakage monitoring system can set up in soil and the explosion-proof well lid of this groundwater monitoring well cooperation derrick of this groundwater monitoring well can form the enclosure space, compares with the correlation technique, and this oil gas leakage monitoring system can detect the oil gas leakage condition of leaking the leakage source in the soil to this oil gas leakage monitoring system receives external influence little, makes the reliability of having improved the detection when richening the monitoring mode of oil gas leakage.
Exemplarily, the following is an installation method of the oil and gas leakage monitoring system provided by the embodiment of the application:
1. drilling by using a drilling tool according to the set well depth of the underground water monitoring well, the stop well diameter and the opening well diameter of the underground water monitoring well;
2. setting a bottom seal at the bottom of the underground water monitoring well;
3. installing a steel pipe and a well pipe which have the same diameter as the underground water monitoring well, wherein the well pipe comprises a sedimentation pipe, a filter pipe and a well wall pipe which are sequentially connected from bottom to top, and the lower parts of the sedimentation pipe, the filter pipe and the well wall pipe are provided with a fine hole area;
4. sequentially filling: firstly, filling a filter material in a filter material section, then filling quartz fine sand with the thickness of 0.1 mm-0.2 mm in the quartz sand section, and filling clay balls or bentonite in a clay section, wherein the filter material section is higher than the filter pipe, and the quartz sand section is flush with the pore area;
5. cement is poured into the cement section, so that the upper surface of the cement section is flush with the ground, and a cable pipeline is reserved on the upper surface of the cement section;
6. surrounding a derrick on a wellhead arranged on a well pipe;
7. placing a combustible gas detector on a platform of a derrick, connecting one end of a cable to the combustible gas detector, and connecting the other end of the cable to an alarm controller outside an underground water monitoring well through a reserved cable pipeline;
8. arranging an explosion-proof well cover on the derrick, wherein the explosion-proof well cover is matched with the derrick to form a closed space;
9. one end of a cable is connected with the alarm controller, and the other end of the cable is connected with the station control platform.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The term "and/or" in the embodiment of the present application is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The above description is only exemplary of the present application and is not intended to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (10)
1. An oil and gas leakage monitoring system, characterized in that, oil and gas leakage monitoring system includes: the system comprises an underground water monitoring well, a combustible gas detector and an alarm controller, wherein the combustible gas detector is in communication connection with the alarm controller;
the underground water monitoring well comprises a well pipe, a derrick and an explosion-proof well cover, wherein the side wall of the well pipe is provided with a fine hole area, the bottom of the well pipe is provided with a bottom seal, the derrick is arranged around a well head of the well pipe, the explosion-proof well cover is arranged on the derrick, the explosion-proof well cover is matched with the derrick to form a closed space, and the well head of the well pipe is positioned in the closed space;
the combustible gas detector is used for detecting the concentration of combustible gas in the well pipe;
the alarm controller is used for sending out an alarm signal when the concentration of the combustible gas in the well pipe reaches a first threshold value.
2. The hydrocarbon leak monitoring system of claim 1, wherein the explosion-proof well cover is made of a resin material.
3. The hydrocarbon leak monitoring system of claim 1, wherein the combustible gas detector is disposed at a wellhead of the well tubular.
4. The hydrocarbon leak monitoring system of claim 1, wherein the combustible gas detector comprises one or more of a diesel detector, a gasoline detector, or an oil film detector.
5. The system for monitoring oil and gas leakage according to claim 1, wherein the well casing is provided with a bottom seal, a filter material section, a quartz sand section, a clay section and a cement section are sequentially arranged on the outer side of the well casing from bottom to top, the well casing comprises a settling pipe, a filter pipe and a casing pipe which are sequentially connected from bottom to top, and the fine pore area is positioned in the filter material section and the quartz sand section.
6. The hydrocarbon leak monitoring system of claim 1 or 5, wherein the open porosity of the fine pore region ranges from 60% to 80%.
7. The hydrocarbon leak monitoring system of claim 1 or 5, wherein the length of the perforated region ranges from 4 to 18 meters.
8. The hydrocarbon leakage monitoring system of claim 1, wherein the combustible gas detector is connected to the alarm controller by a cable;
the combustible gas detector is used for converting the detected combustible gas concentration into an electric signal and transmitting the electric signal to the alarm controller through the cable, and the strength of the electric signal is positively correlated with the combustible gas concentration;
the alarm controller is used for sending the alarm signal when the intensity of the electric signal received by the cable reaches a second threshold value.
9. The hydrocarbon leak monitoring system of claim 1, wherein the groundwater monitoring well is located downstream of a target leak source.
10. The hydrocarbon leak monitoring system of claim 1, further comprising: the station control platform is in communication connection with the alarm controller;
the alarm controller is further used for sending an alarm signal to the station control platform when the concentration of the combustible gas in the well pipe reaches the first threshold value.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481927A (en) * | 1993-09-24 | 1996-01-09 | Lockheed Idaho Technologies Company | Vapor port and groundwater sampling well |
| CN102491603A (en) * | 2011-12-29 | 2012-06-13 | 北京市环境保护科学研究院 | Air injection system and method for in situ restoration of volatile pollutant in underground water |
| CN104074507A (en) * | 2014-07-02 | 2014-10-01 | 北京航天易联科技发展有限公司 | Underground detection device, underground detection system and well lid |
| CN204182671U (en) * | 2014-10-24 | 2015-03-04 | 武汉绿之地环保节能科技有限公司 | For the heterogeneous extracting prosthetic device of single pump hydrocone type that contaminated site is repaired |
| CN105954464A (en) * | 2016-04-21 | 2016-09-21 | 北京中地泓科环境科技有限公司 | Method for constructing soil gas and underground water monitoring wells |
| CN106323381A (en) * | 2016-09-22 | 2017-01-11 | 湖南优图信息技术有限公司 | Manhole cover detection device and method |
| WO2017138451A1 (en) * | 2016-02-12 | 2017-08-17 | 博 堀江 | Device for predicting combustible gas eruption during earthquake |
| KR20170099491A (en) * | 2016-02-24 | 2017-09-01 | (주)엔지오스 | Groundwater level monitoring of soil and oil leakage detection system |
| CN210950814U (en) * | 2019-10-23 | 2020-07-07 | 江苏红光仪表厂有限公司 | Online monitoring and networking alarm device for petroleum and natural gas pipeline leakage |
| WO2020189867A1 (en) * | 2019-03-21 | 2020-09-24 | 주식회사 효림 | Real-time underground volatile organic compound leakage detection system |
-
2020
- 2020-12-01 CN CN202011392385.2A patent/CN114577412A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481927A (en) * | 1993-09-24 | 1996-01-09 | Lockheed Idaho Technologies Company | Vapor port and groundwater sampling well |
| CN102491603A (en) * | 2011-12-29 | 2012-06-13 | 北京市环境保护科学研究院 | Air injection system and method for in situ restoration of volatile pollutant in underground water |
| CN104074507A (en) * | 2014-07-02 | 2014-10-01 | 北京航天易联科技发展有限公司 | Underground detection device, underground detection system and well lid |
| CN204182671U (en) * | 2014-10-24 | 2015-03-04 | 武汉绿之地环保节能科技有限公司 | For the heterogeneous extracting prosthetic device of single pump hydrocone type that contaminated site is repaired |
| WO2017138451A1 (en) * | 2016-02-12 | 2017-08-17 | 博 堀江 | Device for predicting combustible gas eruption during earthquake |
| KR20170099491A (en) * | 2016-02-24 | 2017-09-01 | (주)엔지오스 | Groundwater level monitoring of soil and oil leakage detection system |
| CN105954464A (en) * | 2016-04-21 | 2016-09-21 | 北京中地泓科环境科技有限公司 | Method for constructing soil gas and underground water monitoring wells |
| CN106323381A (en) * | 2016-09-22 | 2017-01-11 | 湖南优图信息技术有限公司 | Manhole cover detection device and method |
| WO2020189867A1 (en) * | 2019-03-21 | 2020-09-24 | 주식회사 효림 | Real-time underground volatile organic compound leakage detection system |
| CN210950814U (en) * | 2019-10-23 | 2020-07-07 | 江苏红光仪表厂有限公司 | Online monitoring and networking alarm device for petroleum and natural gas pipeline leakage |
Non-Patent Citations (1)
| Title |
|---|
| 苏佳林等: "《中华人民共和国国家标准 地下水监测工程技术规范 GB/T 51040-2014》", 30 April 2015, 中国计划出版社, pages: 9 - 10 * |
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