CN113701062A - Monitoring method and monitoring device for oil and gas stealing during drilling of oil and gas pipeline - Google Patents
Monitoring method and monitoring device for oil and gas stealing during drilling of oil and gas pipeline Download PDFInfo
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- CN113701062A CN113701062A CN202010434563.7A CN202010434563A CN113701062A CN 113701062 A CN113701062 A CN 113701062A CN 202010434563 A CN202010434563 A CN 202010434563A CN 113701062 A CN113701062 A CN 113701062A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 183
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 238000005553 drilling Methods 0.000 title claims abstract description 13
- 238000004080 punching Methods 0.000 claims abstract description 84
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000004210 cathodic protection Methods 0.000 claims description 17
- 238000013024 troubleshooting Methods 0.000 claims description 9
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- 229930195733 hydrocarbon Natural products 0.000 claims description 4
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- 239000003209 petroleum derivative Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 17
- 239000002184 metal Substances 0.000 description 14
- 238000005070 sampling Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 238000011835 investigation Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
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- 238000005536 corrosion prevention Methods 0.000 description 1
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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Abstract
The invention provides a monitoring method and a monitoring device for oil and gas theft during drilling of an oil and gas pipeline, and belongs to the field of petroleum gas pipeline theft prevention. The monitoring method comprises the following steps: dividing the oil and gas transmission pipeline into a plurality of monitoring sections; monitoring the pipe-to-ground potential offset on each monitoring section, wherein the potential offset comprises positive offset and negative offset; if the monitoring section has positive offset and negative offset, determining the corresponding monitoring section as a suspected punching oil-gas stealing section according to the characteristics of the monitored pipe-to-ground potential offset condition; and checking all suspected punching oil and gas stealing sections to determine the actual punching oil and gas stealing sections. The method can accurately find out the position of the punching oil stealing operation and avoid the problem of less measurement and missing measurement.
Description
Technical Field
The disclosure belongs to the field of petroleum gas pipeline theft prevention, and particularly relates to a monitoring method and a monitoring device for drilling and oil gas stealing of a petroleum gas pipeline.
Background
The oil and gas pipeline is an important part of petroleum gas transportation and is used for conveying petroleum gas.
The punching and oil and gas stealing are one of the prominent security risks faced by domestic pipeline operation enterprises. According to statistics, the pipeline safety accidents reported in the domestic nearly 10 years are public, and external risk factors are the main reasons for pipeline accidents, wherein the accidents caused by human influence (stealing oil gas) account for 10%. Common punching and oil gas stealing operation modes include a welding mode, a hoop mode, a steel drill mode and a bonding mode.
The risk brought to the pipeline enterprise by the problem of punching and stealing oil gas mainly comprises the following three aspects of (1) serious potential safety hazard brought to the pipeline enterprise by punching and stealing oil gas. The oil and gas stealing welding operation implemented by tapping oil and gas stealing molecules is often short in time, low in welding quality and easy to cause oil and gas leakage accidents, so that serious environmental protection events are caused. (2) Perforating and oil and gas theft events can result in significant direct economic losses. (3) The punching and oil and gas stealing events can cause companies to face huge social public opinion pressure and generate severe social influence.
In the related art, in order to solve the problem of oil and gas stealing due to punching, the following technical measures are mainly adopted: pipeline operation parameters such as pressure, flow and the like of each station and valve chamber along the oil and gas pipeline are collected through a pipeline leakage monitoring system. The leakage event of the oil and gas transmission pipeline is identified and positioned by utilizing negative pressure waves and flow transmission difference generated by monitoring the leakage of the oil and gas transmission pipeline.
However, the pipeline leakage monitoring system has high real-time alarming and positioning accuracy for the leakage of a large amount of oil gas, but the sensitivity to small leakage needs to be improved, and the problem of less leakage detection exists.
Disclosure of Invention
The embodiment of the disclosure provides a method for monitoring oil and gas stealing during drilling of an oil and gas pipeline, which can avoid the problem of less measurement and missing measurement. The technical scheme is as follows:
on the one hand, the embodiment of the disclosure provides a monitoring method for oil and gas stealing during drilling of an oil and gas transmission pipeline, which comprises the following steps:
dividing the oil and gas transmission pipeline into a plurality of monitoring sections;
monitoring the potential offset on each monitoring section, wherein the potential offset comprises positive offset and negative offset;
if the monitoring section has positive offset and negative offset, determining the corresponding monitoring section as a suspected punching oil-stealing gas section;
and checking all suspected punching oil and gas stealing sections to determine the actual punching oil and gas stealing sections.
Optionally, the monitoring the amount of potential offset on each monitoring section includes:
setting the cathodic protection potential of the oil and gas transmission pipeline as a reference potential value of each monitoring section;
measuring the actual potential value of each of the monitoring sections;
and calculating to obtain the potential offset of each monitoring section according to the actual potential value and the reference potential value of each monitoring section.
Optionally, the checking all the suspected punched oil and gas stealing sections includes:
acquiring the potential offset moment of the suspected punched oil-stealing gas section;
if the potential offset time of the suspected punched oil-gas stealing section is over-overlapped within 48 hours, and the potential offset time of the suspected punched oil-gas stealing section is within the operation time of rail transit, the corresponding suspected punched oil-gas stealing section is not determined as the actual punched oil-gas stealing section.
Optionally, the checking all the suspected punched oil and gas stealing sections includes:
and if the potential offset of the suspected punching oil-gas stealing section is not larger than the potential offset threshold, not determining the corresponding suspected punching oil-gas stealing section as the actual punching oil-gas stealing section.
Optionally, the checking all the suspected punched oil and gas stealing sections includes:
and if the potential offset time of the suspected punching and oil gas stealing section is not overlapped within 48 hours, and the potential offset of the suspected punching and oil gas stealing section is larger than the potential offset threshold, determining the corresponding suspected punching and oil gas stealing section as the actual punching and oil gas stealing section.
On the other hand, this disclosed embodiment provides a monitoring devices that oil gas was stolen in oil transportation pipeline punching, monitoring devices includes:
the segmentation module is used for dividing the oil and gas transmission pipeline into a plurality of monitoring segments;
the monitoring module is used for monitoring the potential offset on each monitoring section, and the potential offset comprises positive offset and negative offset;
the primary selection module is used for determining the corresponding monitoring section as a suspected punching oil and gas stealing section if the monitoring section has positive offset and negative offset;
and the checking module is used for checking all suspected punching oil and gas stealing sections so as to determine the actual punching oil and gas stealing sections.
Optionally, the monitoring module comprises:
the reference setting module is used for setting the cathodic protection potential of the oil and gas pipeline as the reference potential value of each monitoring section;
the measuring module is used for measuring the actual potential value of each monitoring section;
and the calculation module is used for calculating the potential offset on each monitoring section according to the actual potential value and the reference potential value of each monitoring section.
Optionally, the troubleshooting module comprises:
the time module is used for acquiring the potential offset time of the suspected punching oil-stealing gas section;
and the first checking submodule is used for not determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section if the potential offset time of the suspected punched oil-gas stealing section is overlapped within 48 hours and the potential offset time of the suspected punched oil-gas stealing section is within the operation time of rail transit.
Optionally, the troubleshooting module comprises:
and the second checking submodule is used for not determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section if the potential offset of the suspected punched oil-gas stealing section is not greater than a potential offset threshold value.
Optionally, the troubleshooting module comprises:
and the third checking submodule is used for determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section if the potential offset time of the suspected punched oil-gas stealing section is not overlapped within 48 hours and the potential offset of the suspected punched oil-gas stealing section is greater than the potential offset threshold value.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
according to the monitoring method provided by the embodiment of the disclosure, when the oil and gas stealing and punching of the oil and gas transmission pipeline are monitored, the plurality of oil and gas transmission pipelines are firstly divided into the plurality of monitoring sections, so that each monitoring section is conveniently and subsequently monitored, and the monitoring accuracy is further improved. And then, monitoring the potential offset on each monitoring section, namely monitoring the positive offset and the negative offset of the potential on each monitoring section, so that whether the monitoring section has a suspected punching oil and gas stealing section or not can be judged in the subsequent steps. Then, when a metal valve is welded on the punched and stolen oil gas, positive offset and negative offset are generated on the corresponding monitoring section at the same time, if the monitoring section has the positive offset and the negative offset, the corresponding monitoring section is determined as a suspected punched and stolen oil gas section for further examination in subsequent steps. And finally, checking all suspected punching oil-gas stealing sections to determine the actual punching oil-gas stealing sections, namely the monitoring sections with the punching oil-stealing operation.
That is to say, because the monitoring method that this disclosure embodiment provided locates to exist and punches the monitoring section of stealing oil operation through the electric potential skew that produces on the monitoring oil gas pipeline, and as long as weld the metal valve that steals oil on the oil gas pipeline, the electric potential skew that produces when can certainly monitoring welding. Therefore, the monitoring method provided by the embodiment of the disclosure can solve the problem of leakage detection.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating the flow of electrical current through a hydrocarbon pipeline provided by an embodiment of the present disclosure;
fig. 2 is a flowchart of a method for monitoring perforation and oil and gas theft of an oil and gas pipeline according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of another monitoring method for oil and gas theft during drilling of an oil and gas pipeline according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a monitoring device for oil and gas theft during drilling of an oil and gas pipeline according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The embodiment of the disclosure provides a monitoring method for oil and gas stealing by punching in an oil and gas pipeline, which utilizes the characteristic that a metal valve for oil stealing is welded on the oil and gas pipeline, and the potential deviation is inevitably generated. The actual punching and oil-gas stealing section is determined by monitoring the potential deviation generated on the oil and gas pipeline, namely the monitoring section for punching and oil-stealing operation exists.
Referring to fig. 1, the flow direction of current when a metal valve for stealing oil is welded on an oil and gas pipeline is described as follows:
and a metal valve 2 is welded on the oil and gas transmission pipeline 1 so as to connect the pipeline to steal the oil and gas transmitted in the oil and gas transmission pipeline 1. During welding, welding current flows to both sides of the welding point (I)1、I2) And flows to both ends along the oil and gas transmission pipeline 1, thereby causing the potential offset of the oil and gas transmission pipeline.
Fig. 2 is a flowchart of the monitoring method for oil and gas theft during drilling of the oil and gas transmission pipeline, and with reference to fig. 2, the monitoring method includes:
step 201: the oil and gas pipeline is divided into a plurality of monitoring sections.
When the monitoring sections are divided, the oil and gas transmission pipelines can be divided into the monitoring sections with different quantities and lengths according to actual requirements. It will be readily appreciated that the lengths of the monitoring segments may be the same or different, and the present disclosure is not limited thereto.
Step 202: and monitoring the potential offset on each monitoring section, wherein the potential offset comprises positive offset and negative offset.
In order to realize corrosion prevention of oil and gas pipelines, cathodic protection is usually performed on the oil and gas pipelines, that is, cathodic protection current (I) flows on the pipelines3). In order to monitor whether the cathodic protection is normal, an automatic potential collector is usually provided.
For example, the automatic potential collector with the specification CDP-S-OGP-AC-025-2018-1 is introduced in technical Specification for cathodic protection automatic potential collector of the automatic potential collector, and the automatic potential collector supports 24-hour continuous sampling with a minimum sampling interval of 1 second. The potential sampling range of the potential automatic acquisition instrument has three types, which are respectively: -5.0V- +5.0V, -20.0V- +20.00V or-100.0V- +100.0V, and the three potential sampling ranges can be automatically switched.
Generally speaking, the cathodic protection potential (no IR drop) of the oil and gas pipeline is generally between-085V and-1.25V. The sampling interval with electric potential automatic acquisition appearance is 1 second, carries out once sampling every second promptly, can gather the less electric potential skew on the oil gas pipeline to accord with this open embodiment to the product requirement of electric potential automatic acquisition appearance. That is to say, the implementation of the monitoring method provided by the embodiment of the present disclosure does not require additional devices, so that the implementation cost of the monitoring method is low.
Step 203: and judging whether the monitoring section has positive offset and negative offset simultaneously.
If the monitoring section has both positive offset and negative offset, the corresponding monitoring section is determined as the suspected punching oil-gas stealing section, and step 204 is executed. If the monitoring sections do not have positive offset and negative offset at the same time, the corresponding monitoring section is not determined as the suspected punching oil-gas stealing section, and the step 202 is continuously executed.
It should be noted that if there is only one potential offset (positive offset and negative offset) on the monitoring section, this may be caused by interference from an external interference source such as the hvdc transmission system. Therefore, it is not considered as a suspected hole-stealing section.
Step 204: and checking all suspected punching oil and gas stealing sections to determine the actual punching oil and gas stealing sections.
It should be noted that the suspected perforation and oil gas stealing section is not equal to the actual perforation and oil gas stealing section. Because there may be other factors besides welding metal valves to the oil and gas pipeline that result in both positive and negative offsets to the oil and gas pipeline. Therefore, all suspected punching oil-gas stealing sections need to be checked, so that the actual punching oil-gas stealing sections can be accurately determined.
According to the monitoring method provided by the embodiment of the disclosure, when the oil and gas stealing and punching of the oil and gas transmission pipeline are monitored, the plurality of oil and gas transmission pipelines are firstly divided into the plurality of monitoring sections, so that each monitoring section is conveniently and subsequently monitored, and the monitoring accuracy is further improved. And then, monitoring the potential offset on each monitoring section, namely monitoring the positive offset and the negative offset of the potential on each monitoring section, so that whether the monitoring section has a suspected punching oil and gas stealing section or not can be judged in the subsequent steps. Then, when a metal valve is welded on the punched and stolen oil gas, positive offset and negative offset are generated on the corresponding monitoring section at the same time, if the monitoring section has the positive offset and the negative offset, the corresponding monitoring section is determined as a suspected punched and stolen oil gas section for further examination in subsequent steps. And finally, checking all suspected punching oil-gas stealing sections to determine the actual punching oil-gas stealing sections, namely the monitoring sections with the punching oil-stealing operation.
That is to say, because the monitoring method that this disclosure embodiment provided locates to exist and punches the monitoring section of stealing oil operation through the electric potential skew that produces on the monitoring oil gas pipeline, and as long as weld the metal valve that steals oil on the oil gas pipeline, the electric potential skew that produces when can certainly monitoring welding. Therefore, the monitoring method provided by the embodiment of the disclosure can solve the problem of leakage detection.
Fig. 3 is another monitoring method for oil and gas theft by drilling a hole in an oil and gas pipeline according to an embodiment of the present disclosure, and with reference to fig. 3, the monitoring method includes:
step 301: the oil and gas pipeline is divided into a plurality of monitoring sections.
The manner of dividing the oil and gas pipeline is the same as that in step 201, and is not described herein.
Step 302: and setting the cathodic protection potential of the oil and gas transmission pipeline as the reference potential value of each monitoring section.
It can be known from the foregoing that the oil and gas pipeline is often provided with cathodic protection electricity, so that a cathodic protection potential can be often monitored at a monitoring point of the potential automatic acquisition instrument. If a potential shift occurs in the oil and gas pipeline, the potential shift should be based on the cathodic protection potential. Therefore, setting the cathodic protection potential of the oil and gas pipeline to the reference potential value of each monitoring section can facilitate accurate calculation of the actual potential offset in step 304.
It should be noted that according to GB/T21448-2017 technical Specification for cathode protection of buried steel pipelines, the effective cathode protection potential range of oil and gas pipelines is (without IR drop) -085V-1.25V.
Step 303: the actual potential value of each monitored segment is measured.
The actual potential value may be measured by an automatic potential collector, which may facilitate accurate calculation of the actual potential offset in step 304.
Step 304: and calculating to obtain the potential offset on each monitoring section according to the actual potential value and the reference potential value of each monitoring section.
In the above implementation, the potential offset amount may be calculated by subtracting the actual potential value from the reference potential value. And if no potential offset exists on the oil and gas pipeline, the potential offset is zero. If the positive potential deviation exists on the oil and gas transmission pipeline, the difference value between the actual potential value and the reference potential value is an integer, and in this case, the difference value is directly used as the positive deviation amount. If negative potential deviation exists on the oil and gas transmission pipeline, the difference value between the actual potential value and the reference potential value is a negative number, and in this case, for convenience of comparison, the absolute value of the difference value is used as the negative deviation amount.
Step 305: and judging whether the monitoring section has positive offset and negative offset simultaneously.
If the monitoring section has both positive offset and negative offset, the corresponding monitoring section is determined as the suspected perforated oil-gas stealing section, and step 306 is executed. If the monitoring sections do not have positive offset and negative offset at the same time, the corresponding monitoring section is not determined as the suspected punching oil-gas stealing section, and the step 303 is continuously executed.
The determination method is the same as that in step 203, and is not described herein again.
Step 306: and checking all suspected punching oil and gas stealing sections to determine the actual punching oil and gas stealing sections.
In this embodiment, three methods are adopted to check the suspected perforation and oil-gas stealing section, and the following are introduced in sequence:
(1) and acquiring the potential offset time of the suspected punched oil-gas stealing section, and if the potential offset time of the suspected punched oil-gas stealing section is overlapped within 48 hours and the potential offset time of the suspected punched oil-gas stealing section is within the operation time of the rail transit, not determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section.
For example, the potential offset time is within the operation time of rail transit (5: 30-23: 00), and within two times of 48 hours, 6: 00 is the time of potential shift, two times 7: 00 are all potential offset times, etc. Under the condition, potential deviation appearing on the oil and gas transmission pipeline is caused by interference of branch power supply equipment of the rail transit. Therefore, the corresponding suspected perforated oil and gas stealing section is not determined as the actual perforated oil and gas stealing section.
(2) And if the potential offset of the suspected punching oil-gas stealing section is not larger than the potential offset threshold, the corresponding suspected punching oil-gas stealing section is not determined as the actual punching oil-gas stealing section.
For example, if the potential offset threshold is 1V, if the potential offset generated on the oil and gas pipeline is less than 1V, the potential offset is caused by interference of the cathodic protection system of other adjacent oil and gas pipelines. Therefore, the corresponding suspected perforated oil and gas stealing section is not determined as the actual perforated oil and gas stealing section.
Of course, the specific value of the potential offset threshold may be adjusted according to actual requirements, for example, 0.5V, 1.5V, etc., and the disclosure is not limited thereto.
(3) And if the potential offset time of the suspected punched oil-gas stealing section is not overlapped within 48 hours, and the potential offset of the suspected punched oil-gas stealing section is greater than a potential offset threshold value, determining the corresponding suspected punched oil-gas stealing section as an actual punched oil-gas stealing section.
For example, the potential shift timing is dispersed and irregular, and the potential shift amount is within a range of ± 1V to ± 5V, which is larger than the potential shift threshold. Under the condition, the influence of rail transit and the influence of other oil and gas pipelines are eliminated, the welding operation on the oil and gas pipelines is caused with high probability, but whether the welding operation is the metal valve for welding and stealing oil or not cannot be determined.
In order to further distinguish whether the suspected punching oil-stealing section has punching oil-stealing operation or not, the further investigation can be carried out through the following steps:
A. and looking up a maintenance operation plan of the oil and gas pipeline, and judging whether the suspected punched oil and gas stealing section has maintenance operation at the potential offset moment. And if the suspected punched oil-gas stealing section is subjected to maintenance operation during potential deviation, the corresponding suspected punched oil-gas stealing section is not determined as the actual punched oil-gas stealing section. If the suspected punching oil-stealing gas section has no maintenance operation at the time of potential deviation, further investigation is carried out.
B. And informing operators on duty of the station to which the suspected punching oil and gas stealing section belongs to go to the site for investigation. The field investigation range is the range within 2km of the suspected punched oil and gas stealing section upstream and downstream, and is within 2km of the two sides of the suspected punched oil and gas stealing section. During on-site exploration, attention is paid to whether the surrounding earth surface is changed (excavation and backfilling) or not, and whether oil stains or oil odor exist. The surrounding of the oil and gas pipeline has suspicious personnel, vehicle activities and the like. Meanwhile, lawless persons who perform drilling and oil stealing operations often use abandoned plants to perform illegal operations, so that the surrounding idle plants and rental houses of the important concerns of oil and gas pipelines have suspicious signs. In addition, the suspected punching oil-gas stealing section is subjected to anticorrosive layer leakage detection through a multi-frequency pipe medium current method (PCM), and the position of a welding point of a metal valve is found out so as to determine the actual punching oil-gas stealing section.
The following introduces a monitoring method provided by the embodiment of the present disclosure with reference to an actual scene:
the existing finished oil pipeline has the total length of 22km, the pipe diameter of phi 406.4mm, the steel grade of the pipeline is L360, the outer anti-corrosion coating adopts three layers of PE, 6 potential automatic acquisition instruments are arranged on the pipeline and are respectively arranged on 6 monitoring sections, and the labels are respectively k0, k13, k16, k17, k20 and k 22. When the monitoring method provided by the embodiment of the disclosure is not implemented, the sampling frequency of the automatic potential collector is 1 time/24 hours. When the pipeline normally runs, the cathodic protection potential of the monitoring section is-1.20V.
After the monitoring method provided by the embodiment of the present disclosure is implemented, the sampling frequency of the automatic potential collector is set to 1 time/second, that is, the collection interval is 1 second. The potential shift threshold is set to 1V.
The monitoring data collected in 48 hours are analyzed, and potential offsets occur at pipelines k0, k13, k16, k17, k20 and k22, and the pipelines all have positive offset and negative offset at the same time, so that the pipelines are used as suspected perforated oil and gas stealing sections, and detailed table 1 shows the sections.
TABLE 1
As can be seen from Table 1, the positive and negative offsets of the three pipes both exceed 1V. The amount of potential shift at the pipe k17 was the largest, and no overlapping occurred at the time of potential shift within 48 hours, and it was estimated that there was a welding operation near the pipe k 17. By consulting the maintenance operation plan of the oil and gas pipeline, the welding operation of the B-type sleeve for repairing the pipeline defect is carried out near the pipeline k17, so that the punching and oil stealing operation does not occur at the pipeline.
According to the monitoring method provided by the embodiment of the disclosure, when the oil and gas stealing and punching of the oil and gas transmission pipeline are monitored, the plurality of oil and gas transmission pipelines are firstly divided into the plurality of monitoring sections, so that each monitoring section is conveniently and subsequently monitored, and the monitoring accuracy is further improved. And then, monitoring the potential offset on each monitoring section, namely monitoring the positive offset and the negative offset of the potential on each monitoring section, so that whether the monitoring section has a suspected punching oil and gas stealing section or not can be judged in the subsequent steps. Then, when a metal valve is welded on the punched and stolen oil gas, positive offset and negative offset are generated on the corresponding monitoring section at the same time, if the monitoring section has the positive offset and the negative offset, the corresponding monitoring section is determined as a suspected punched and stolen oil gas section for further examination in subsequent steps. And finally, checking all suspected punching oil-gas stealing sections to determine the actual punching oil-gas stealing sections, namely the monitoring sections with the punching oil-stealing operation.
That is to say, because the monitoring method that this disclosure embodiment provided locates to exist and punches the monitoring section of stealing oil operation through the electric potential skew that produces on the monitoring oil gas pipeline, and as long as weld the metal valve that steals oil on the oil gas pipeline, the electric potential skew that produces when can certainly monitoring welding. Therefore, the monitoring method provided by the embodiment of the disclosure can solve the problem of leakage detection.
Fig. 4 is a block diagram of a monitoring device for drilling and stealing oil and gas in a gas transmission pipeline according to an embodiment of the present disclosure, and with reference to fig. 4, the monitoring device includes:
the segmentation module 100 is used for dividing the oil and gas pipeline into a plurality of monitoring segments.
And the monitoring module 200 is configured to monitor a potential offset on each monitoring segment, where the potential offset includes a positive offset and a negative offset.
And the initial selection module 300 is configured to determine the corresponding monitoring section as a suspected punched oil and gas stealing section if the monitoring section has both a positive offset and a negative offset.
And the checking module 400 is used for checking all suspected punching oil and gas stealing sections so as to determine the actual punching oil and gas stealing sections.
Optionally, the monitoring module 200 comprises:
and the reference setting module 210 is used for setting the cathodic protection potential of the oil and gas pipeline as the reference potential value of each monitoring section.
And a measuring module 220 for measuring the actual potential value of each monitoring section.
And the calculating module 230 is configured to calculate a potential offset on each monitoring segment according to the actual potential value and the reference potential value of each monitoring segment.
Optionally, the troubleshooting module 400 includes:
and the time module 410 is used for acquiring the potential offset time of the suspected punching oil-stealing gas section.
The first checking sub-module 420 is configured to, if the potential offset time of the suspected punched oil-gas stealing section is over-overlapped within 48 hours, and the potential offset time of the suspected punched oil-gas stealing section is within the operation time of the rail transit, not determine the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section.
Optionally, the troubleshooting module 400 includes:
and the second checking sub-module 430 is configured to, if the potential offset of the suspected punched oil-gas stealing section is not greater than the potential offset threshold, not determine the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section.
Optionally, the troubleshooting module 400 includes:
and the third checking submodule 440 is configured to determine the corresponding suspected punched oil-gas stealing section as an actual punched oil-gas stealing section if the potential offset time of the suspected punched oil-gas stealing section does not overlap within 48 hours and the potential offset of the suspected punched oil-gas stealing section is greater than a potential offset threshold value.
Through the monitoring devices that this disclosed embodiment provided, punch and steal oil gas to the oil gas transmission pipeline and monitor, at first divide into a plurality of monitoring sections with a plurality of oil gas transmission pipelines through segmentation module 100 to convenient follow-up separately monitors every monitoring section, and then improves the degree of accuracy of monitoring. Next, the monitoring module 200 monitors the potential offset of each monitoring segment, that is, the positive offset and the negative offset of the potential of each monitoring segment, so as to determine whether the monitoring segment has a suspected perforated oil-gas stealing segment in the subsequent steps. Then, when the metal valve is welded on the oil and gas pipeline, a positive offset and a negative offset are generated on the corresponding monitoring section at the same time, so if the monitoring section has the positive offset and the negative offset, the corresponding monitoring section is determined as a suspected punching oil and gas stealing section through the primary selection module 300, and further investigation is performed in subsequent steps. Finally, all suspected punching oil-gas stealing sections are checked through the checking module 400 to determine the actual punching oil-gas stealing sections, namely the monitoring sections with the punching oil-gas stealing operation.
That is to say, because the monitoring method that this disclosure embodiment provided locates to exist and punches the monitoring section of stealing oil operation through the electric potential skew that produces on the monitoring oil gas pipeline, and as long as weld the metal valve that steals oil on the oil gas pipeline, the electric potential skew that produces when can certainly monitoring welding. Therefore, the monitoring method provided by the embodiment of the disclosure can solve the problem of leakage detection.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A monitoring method for oil and gas stealing during drilling of an oil and gas pipeline is characterized by comprising the following steps:
dividing the oil and gas transmission pipeline into a plurality of monitoring sections;
monitoring the potential offset on each monitoring section, wherein the potential offset comprises positive offset and negative offset;
if the monitoring section has positive offset and negative offset, determining the corresponding monitoring section as a suspected punching oil-stealing gas section;
and checking all suspected punching oil and gas stealing sections to determine the actual punching oil and gas stealing sections.
2. The method of claim 1, wherein said monitoring an amount of potential shift on each of said monitoring segments comprises:
setting the cathodic protection potential of the oil and gas transmission pipeline as a reference potential value of each monitoring section;
measuring the actual potential value of each of the monitoring sections;
and calculating to obtain the potential offset of each monitoring section according to the actual potential value and the reference potential value of each monitoring section.
3. The monitoring method according to claim 1, wherein said checking all of said suspected perforated hydrocarbon theft segments comprises:
acquiring the potential offset moment of the suspected punched oil-stealing gas section;
if the potential offset time of the suspected punched oil-gas stealing section is over-overlapped within 48 hours, and the potential offset time of the suspected punched oil-gas stealing section is within the operation time of rail transit, the corresponding suspected punched oil-gas stealing section is not determined as the actual punched oil-gas stealing section.
4. The monitoring method according to claim 3, wherein said checking all of said suspected perforated hydrocarbon theft segments comprises:
and if the potential offset of the suspected punching oil-gas stealing section is not larger than the potential offset threshold, not determining the corresponding suspected punching oil-gas stealing section as the actual punching oil-gas stealing section.
5. The monitoring method according to claim 4, wherein said checking all of said suspected perforated hydrocarbon theft segments comprises:
and if the potential offset time of the suspected punching and oil gas stealing section is not overlapped within 48 hours, and the potential offset of the suspected punching and oil gas stealing section is larger than the potential offset threshold, determining the corresponding suspected punching and oil gas stealing section as the actual punching and oil gas stealing section.
6. The utility model provides a monitoring devices that oil gas was stolen in oil transportation pipeline punching, its characterized in that, monitoring devices includes:
the segmentation module is used for dividing the oil and gas transmission pipeline into a plurality of monitoring segments;
the monitoring module is used for monitoring the potential offset on each monitoring section, and the potential offset comprises positive offset and negative offset;
the primary selection module is used for determining the corresponding monitoring section as a suspected punching oil and gas stealing section if the monitoring section has positive offset and negative offset;
and the checking module is used for checking all suspected punching oil and gas stealing sections so as to determine the actual punching oil and gas stealing sections.
7. The monitoring device of claim 6, wherein the monitoring module comprises:
the reference setting module is used for setting the cathodic protection potential of the oil and gas pipeline as the reference potential value of each monitoring section;
the measuring module is used for measuring the actual potential value of each monitoring section;
and the calculation module is used for calculating the potential offset on each monitoring section according to the actual potential value and the reference potential value of each monitoring section.
8. The monitoring device of claim 6, wherein the troubleshooting module comprises:
the time module is used for acquiring the potential offset time of the suspected punching oil-stealing gas section;
and the first checking submodule is used for not determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section if the potential offset time of the suspected punched oil-gas stealing section is overlapped within 48 hours and the potential offset time of the suspected punched oil-gas stealing section is within the operation time of rail transit.
9. The monitoring device of claim 8, wherein the troubleshooting module comprises:
and the second checking submodule is used for not determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section if the potential offset of the suspected punched oil-gas stealing section is not greater than a potential offset threshold value.
10. The monitoring device of claim 9, wherein the troubleshooting module comprises:
and the third checking submodule is used for determining the corresponding suspected punched oil-gas stealing section as the actual punched oil-gas stealing section if the potential offset time of the suspected punched oil-gas stealing section is not overlapped within 48 hours and the potential offset of the suspected punched oil-gas stealing section is greater than the potential offset threshold value.
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