CN210567527U

CN210567527U - Deep sea oil gas field oil gas production leakage false alarm experimental system

Info

Publication number: CN210567527U
Application number: CN201921073458.4U
Authority: CN
Inventors: 陈跃明
Original assignee: Diamond Energy Technology Shanghai Co ltd; American Drilling Deep Sea Energy Technology Research and Development Shanghai Co Ltd
Current assignee: Diamond Energy Technology Shanghai Co ltd; American Drilling Deep Sea Energy Technology Research and Development Shanghai Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-05-19
Anticipated expiration: 2029-07-10

Abstract

The utility model relates to a deep sea oil gas field oil gas production leakage false alarm experimental system, which arranges a first gate valve in the water in a test water pool to simulate an underwater production system; the gas source power station provides gas with corresponding pressure to the inside of the first gate valve, the underwater production system is simulated to produce oil gas, and a needle valve connected with the first gate valve is operated to release, so that the gas leaks out and generates bubbles in the water to simulate the leakage of the oil gas; the second gate valve opens and closes in the water to simulate background noise. The underwater sonar monitoring unit receives the sound signals and transmits the sound signals to the control device to analyze and process the waveform and the frequency spectrum of the sound signals. The utility model overcomes the problem that the operating mode is complicated, the test cost is high when originally testing under the on-the-spot deep water oil gas field environmental condition of ocean facility effectively accelerated the progress of system operation test, saved the test cost.

Description

Deep sea oil gas field oil gas production leakage false alarm experimental system

Technical Field

The utility model relates to a wrong report alarm experimental system is revealed in deep sea oil gas field oil gas production.

Background

In the process of exploiting deep sea oil and gas resources, because extra-large accidents caused by leakage happen occasionally, great influences are brought to production safety, economy and environment, and early warning of early leakage of a high-corrosion pipeline part and sealing connection of underwater wellhead oil extraction (gas) trees and the like which are key equipment for deep sea oil and gas field production is particularly important, so that the experimental technological process is established.

SUMMERY OF THE UTILITY MODEL

The utility model provides a false alarm experimental system is revealed in deep sea oil gas field oil gas production, experimental environment deploys easily, and the test procedure is simple, effectively saves the test cost for the test progress.

The technical scheme of the utility model is to provide a deep sea oil gas field oil gas production leaks wrong alarm experimental system, contain test pond, air supply power station, first gate valve, second gate valve, needle valve, sonar monitoring unit under water, controlling means;

the first gate valve and the needle valve connected with the first gate valve through a pipeline are placed in water in the test water pool together;

the gas source power station is communicated with the first gate valve through a pipeline, gas with set pressure is filled into the first gate valve, and when the needle valve is in a loose state, the needle valve is enabled to have gas leakage; the second gate valve and the first gate valve are arranged in the water in a neighboring mode, and background noise is generated by opening and closing the second gate valve in a simulated mode; the underwater sonar monitoring unit receives the sound signal and transmits the sound signal to the control device.

Preferably, a 1/2 inch needle valve is used, and 3 inch gate valves are used for the first gate valve and the second gate valve, respectively.

Preferably, the first gate valve is connected with the needle valve and the air source power station through a hose; and the second gate valve is not connected with the needle valve or the air source power station.

Preferably, sonar monitoring unit contains hydrophone, sonar noise meter, the noise amplifier who connects gradually, the hydrophone separates the assigned distance with the needle valve in the aquatic of experimental pond, noise amplifier is connected with controlling means.

Preferably, the frequency of the acoustic signal at leakage is between 2.5-3.2 kHz; the frequency of the simulated background noise is between 10.5-14.5 kHz.

Preferably, the control device comprises an operation platform supporting human-computer interaction, and the operation platform displays the spectral lines and the fluctuation of the spectral lines of the sound signals.

Preferably, the pressure of the insufflation gas is 2000 psi.

The utility model discloses utilize the mill experimental environment of simulation, utilize and use the most part on the production facility under water valve series and some auxiliary assembly under water as the experiment carrier, reveal the function that on-line monitoring system carries out the leakage point location of deep sea oil gas field production key equipment and reports to the police to oil gas and test, the problem that the operating mode is complicated, the test cost is high when overcoming original test under the on-the-spot deep water oil gas field environmental condition of ocean facility for system's operation test progress.

Drawings

FIG. 1 is a schematic diagram of the oil and gas production leakage false alarm experimental system for deep sea oil and gas field of the present invention;

fig. 2 is a signal spectrum diagram of the embodiment of the present invention with leakage and background noise;

fig. 3 to 6 are schematic diagrams of an alarm interface in an embodiment of the present invention, and no alarm is provided in fig. 3, 4 and 6, and an alarm indication is provided in fig. 5.

Detailed Description

As shown in figure 1, the utility model provides a false alarm experimental system is revealed in deep sea oil gas field oil gas production. The experimental system comprises a test water pool 12, an air source power station 11, a first gate valve 14, a second gate valve, a needle valve 15, an underwater sonar monitoring unit and a control device 13. For example, two 3 inch gate valves and a 1/2 inch needle valve may be used.

Wherein, the two gate valves are adjacently arranged (such as integrated or bound together) and are jointly placed in the water in the test pool 12; the first gate valve 14 is used for simulating an underwater production system (such as deep sea oil and gas field production key equipment), and the gas source power station 11 is communicated with the input end of the first gate valve 14 through a hose 19, and is filled with gas with corresponding pressure to simulate the oil and gas production condition of the underwater production system; the output end of the first gate valve 14 is connected with the needle valve 15 through a hose 19, and oil gas leakage can be simulated when the needle valve 15 is controlled to be slightly loosened. When the gas filled in the pipeline reaches a certain pressure, the gas leaked at the needle valve 15 generates bubbles in the water. The second gate valve can be not inflated and is not provided with a needle valve, and the background noise is simulated by operating the second gate valve to repeatedly open and close. The sound signals are received by a hydrophone 16 which is arranged in the pool and is not far away from the two gate valves, are processed by a sonar noise meter 17 and a noise amplifier 18 in sequence, and are transmitted to a control device 13 to perform subsequent analysis on waveforms, frequency spectrums, parameters and the like of the sound signals, and the results are displayed through an interface of an operation platform supporting man-machine interaction.

If the sound signal and the analysis result thereof measured by the underwater sonar monitoring unit are consistent with the actual arrangement and operation of relevant equipment in the experimental system for simulating oil and gas production, the functions of the underwater sonar monitoring unit and the control device 13 are complete. The underwater sonar monitoring unit and the control device 13 which are subjected to functional verification can be used for further testing whether leakage exists in the underwater production system or not and positioning the leakage point in an experimental environment or a field environment. The actual arrangement and operation of the apparatus described above is, for example, the distance between the simulated leak and the hydrophone 16, whether the gas station 11 is supplying gas to the first gate valve 14, the opening or closing operation of the needle valve 15, the opening or closing operation of the second gate valve, etc.

By analyzing the power spectrum of the sound signal, the leakage of the underwater production system or the simulation system thereof can be judged, the position of the leakage can be positioned, and whether the background noise exists can be judged. Fig. 2 shows a signal power spectrum acquired in a particular embodiment. By looking at the waveform and spectrum of the signal, it can be seen that the power spectrum is relatively flat without leakage, the spectral line changes significantly with leakage (arrow 200), and the spectral line changes significantly with background noise (arrow 200). Wherein, when leakage exists, the main energy of the sound signal is concentrated in the frequency band of 2.5-3.2kHz, and the signal in the frequency band is analyzed, so that the requirement of positioning the leakage position can be met. The main energy of the background noise is concentrated in the 10.5-14.5kHz band.

Therefore, when the experiment can be respectively in the second gate valve production or when not producing the background noise of simulation, gather the sound signal and pass through controlling means analysis through sonar monitoring unit under water. When the second gate valve generates background noise, if the control device 13 can still analyze the frequency spectrum corresponding to the sound signal when the gas leaks correspondingly, and successfully distinguish the frequency spectrum corresponding to the background noise, the system is considered to meet the relevant requirements, and false alarm is not generated.

Fig. 3 to fig. 6 are schematic diagrams of an alarm interface of an operation platform according to an embodiment of the present invention. In this example, the distance between the hydrophone and the simulated leak point of the needle valve was 1.5m, and the test pressure was 2000 psi. The early warning starting time is 14:14:20 and corresponds to the starting time or the resetting time of the control device; the amplitude of the signal at 14:17:30 is-48.53 dB and the frequency is 2543.69Hz into the range 2.5-3.2kHz (fig. 3), starting from which a sound signal is continuously acquired for a first period of time, in this case 2 minutes 10 seconds between 14:17:30 and 14:19:40 (fig. 4), the specific value of which can be set by the operator on the control device. In a second time period, judging whether the frequency of the sound signal collected in the first time period is in the range, if the frequency is basically in the range, judging that leakage exists, and performing alarm indication; the second time period in this example, from 14:19:40 to 14:23:15, at which 14:23:15 the alarm indication signal is triggered (alarm indicator light changes colour in figure 5), corresponds to a system alarm response time of 3 minutes 35 seconds. In the example of fig. 6, the signal has a frequency of 13028.41Hz and falls within the frequency band 10.5-14.5kHz corresponding to background noise, and thus no alarm is given.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. A deep sea oil and gas field oil and gas production leakage false alarm experimental system is characterized by comprising a test water pool, an air source power station, a first gate valve, a second gate valve, a needle valve, an underwater sonar monitoring unit and a control device;

the first gate valve and the needle valve connected with the first gate valve through a pipeline are placed in water in the test water pool together; the gas source power station is communicated with the first gate valve through a pipeline, gas with set pressure is filled into the first gate valve, and when the needle valve is in a loose state, the needle valve is enabled to have gas leakage; the second gate valve and the first gate valve are arranged in the water in a neighboring mode, and background noise is generated by opening and closing the second gate valve in a simulated mode; the underwater sonar monitoring unit receives the sound signal and transmits the sound signal to the control device.

2. The deep sea oil and gas field oil and gas production leakage false alarm experiment system of claim 1, wherein a 1/2 inch needle valve is used, and a 3 inch gate valve is used for the first gate valve and the second gate valve respectively.

3. The deep sea oil and gas field oil and gas production leakage false alarm experimental system of claim 1, wherein the first gate valve is connected with a needle valve and an air source power station through a hose; and the second gate valve is not connected with the needle valve or the air source power station.

4. The deep sea oil and gas field oil and gas production leakage false alarm experimental system of claim 1, characterized in that, the sonar monitoring unit under water contains hydrophone, sonar noise meter, the noise amplifier who connects gradually, the hydrophone separates the assigned distance with the needle valve in the aquatic of experimental pond, the noise amplifier is connected with controlling means.

5. The deep sea oil and gas field oil and gas production leakage false alarm experimental system of claim 1, wherein the frequency of the sound signal at the time of leakage is between 2.5-3.2 kHz; the frequency of the simulated background noise is between 10.5-14.5 kHz.

6. The deep sea oil and gas field oil and gas production leakage false alarm experimental system as claimed in claim 1 or 5, wherein the control device comprises an operation platform supporting man-machine interaction, and the operation platform displays the spectral lines and the fluctuation of the sound signals.

7. The deep sea field oil and gas production leak false alarm experimental system of claim 1, wherein the pressure of the charge gas is 2000 psi.