CN210920975U

CN210920975U - Deep sea oil gas field oil gas production leakage point positioning and alarming experiment system

Info

Publication number: CN210920975U
Application number: CN201921074214.8U
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: 2020-07-03
Anticipated expiration: 2029-07-10

Abstract

The utility model provides a deep sea oil and gas field oil gas production leakage point positioning and alarming experiment system, which arranges a gate valve in the water in an experiment water pool to simulate an underwater production system; the gas source power station provides gas with corresponding pressure to the inside of the gate valve, the underwater production system is simulated to produce oil gas, and a needle valve connected with the gate valve is operated to loosen, so that the gas leaks out in water to generate bubbles, and the oil gas leakage is simulated; the underwater sonar monitoring unit receives sound signals emitted by the bubbles and transmits the sound signals to the control device to analyze and process waveforms and frequency spectrums 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 point positioning and alarming experiment system

Technical Field

The utility model relates to a deep sea oil gas field oil gas production point location and warning experimental system.

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 deep sea oil gas field oil gas production leak point location and warning experimental system, experimental environment deploys easily, and the test procedure is simple, effectively saves the test cost for the test progress.

The utility model provides a technical scheme for providing a deep sea oil gas field oil gas production leakage point positioning and alarming experiment system, which comprises a test pool, an air source power station, a gate valve, a needle valve, an underwater sonar monitoring unit and a control device;

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

the gas source power station is communicated with the gate valve through a pipeline, gas with set pressure is filled into the gate valve, and when the needle valve is in a loose state, the gas leakage exists at the needle valve; the underwater sonar monitoring unit receives the sound signal and transmits the sound signal to the control device.

Preferably, a 3 inch gate valve and an 1/2 inch needle valve are used.

Preferably, the gate valve is connected with the needle valve and the air source power station through a hose.

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.

Preferably, the control device comprises an operation platform supporting human-computer interaction, spectrum lines of the sound signals are displayed, and the spectrum lines in gas leakage correspondingly fluctuate.

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 view of the oil and gas production leakage point positioning and alarming experiment system of the deep sea oil and gas field of the utility model;

FIG. 2 is a power spectrum with a leak in an embodiment of the present invention;

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 deep sea oil gas field oil gas production leakage point location and warning experimental system. The experimental system comprises a test water pool 12, an air source power station 11, a gate valve 14, a needle valve 15, an underwater sonar monitoring unit and a control device 13. For example, a 3 "gate valve and an 1/2" needle valve may be used.

Wherein, the gate valve 14 is arranged in the water in the test water tank 12 and is used for simulating an underwater production system (such as a key production device of a deep-sea oil and gas field); the gas source power station 11 is communicated with the input end of the gate valve 14 through a hose 19, and gas with corresponding pressure is filled into the gas source power station for simulating the oil gas production condition of the underwater production system; the output end of the 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 from the needle valve 15 generates bubbles in the water, the generated sound signal can be received by the hydrophone 16 arranged in the pond at a short distance, and is transmitted to the control device 13 to perform subsequent analysis on the waveform, frequency spectrum, parameters and the like of the sound signal after being processed by the sonar noise meter 17 and the noise amplifier 18 in sequence, and the result is 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 supplies gas to the gate valve 14, the opening or closing operation of the needle valve 15, etc.

By analyzing the power spectrum of the sound signal, the existence of leakage of the underwater production system or the simulation system thereof can be judged and the position of the leakage can be positioned. Fig. 2 shows a signal power spectrum acquired in a particular embodiment. By checking the waveform and frequency spectrum of the signal, it can be seen that the main energy of the sound signal is concentrated in the frequency band of 2.5-3.2kHz when leaking, and the signal in the frequency band is analyzed, so that the requirement of positioning the leaking position can be met.

The utility model discloses detecting to have the leakage to exist the back, carrying out the multiple acquisition and carrying out the time delay estimation to the sound signal when leaking, can further confirm the leak source position. As can be seen from fig. 2, the power spectrum is relatively flat without leakage (below 60dB in magnitude and negligible), the spectral lines change significantly when leakage occurs, and the energy is concentrated between 2.5 and 5kHz, preferably between 2.5 and 3.2 kHz. At this time, the cut-off frequency of the digital filter can be set, after denoising processing, the sound signal during leakage is analyzed by a generalized cross-correlation method, the time delay value is 2.687ms, the distance between the leakage point and the hydrophone is calculated to be 1.492m, the distance is close to the leakage point simulated by the hydrophone and the needle valve during actual arrangement, the above process is repeated for 10min, and the measured spectral lines during all leakage are basically consistent.

Ten measurements were made under the same conditions in this example to obtain ten sets of data, as shown in the following table:

time delay value for positioning test of leakage point of meter

The average value 2.745ms of time delay value is got, leak source distance sonar 1.521m is worked out, and is very identical with actual conditions, and the error is approximately apprxed 1.18%, explains that the generalized cross-correlation method is effective, through the utility model discloses a system location leak source is successful.

Fig. 3 to fig. 6 are schematic diagrams of an alarm interface of an operation platform according to an embodiment of the present invention. 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 frequency of the signal is 13028.41Hz, outside the above range, 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 point positioning and alarming experiment system is characterized by comprising a test pool, an air source power station, a gate valve, a needle valve, an underwater sonar monitoring unit and a control device;

the gas source power station is communicated with the gate valve through a pipeline and transmits gas to the gate valve, so that the gas is transmitted to the needle valve through the gate valve and leaks out through the needle valve; the underwater sonar monitoring unit receives the sound signal and transmits the sound signal to the control device.

2. The deep sea field oil and gas production leak source positioning and alarm experiment system of claim 1, wherein 3 "gate valve and 1/2" needle valve are used.

3. The deep sea oil and gas field oil and gas production leakage point positioning and alarm experiment system of claim 1, wherein the gate valve is connected with the needle valve and the gas source power station through a hose.

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

5. The deep sea field oil and gas production leak source locating and alarm experiment system of claim 1, wherein the frequency of the sound signal at the time of leak is between 2.5 kHz and 3.2 kHz.

6. The deep sea oil and gas field oil and gas production leakage point positioning and alarm experiment system as claimed in claim 1 or 5, wherein the control device comprises an operation platform supporting man-machine interaction, and a display interface is arranged on the operation platform for displaying the spectral lines of sound signals and the spectral line fluctuation in gas leakage.