CN103726834B - A kind of sustained casing pressure diagnosis device and method - Google Patents
A kind of sustained casing pressure diagnosis device and method Download PDFInfo
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- CN103726834B CN103726834B CN201210379885.1A CN201210379885A CN103726834B CN 103726834 B CN103726834 B CN 103726834B CN 201210379885 A CN201210379885 A CN 201210379885A CN 103726834 B CN103726834 B CN 103726834B
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Abstract
The present invention proposes a kind of sustained casing pressure diagnosis device and method, and the device includes：Liquid level monitor for monitoring liquid level in annular space, the pressure sensor for monitoring pressure, the flowmeter for monitoring open flow flow.One four-way is wherein installed at surface casing pressure cock, four connect the ejecting gun for annulus liquid level monitoring, the pressure sensor for monitoring pressure, and the high pressure line valve for deflating, and flowmeter and pressure sensor are housed on high pressure line valve.Method includes：Liquid level in current annular space is monitored by liquid level monitor, and calculates the volume of current annular space apart from the altimeter of well head according to liquid level；The valve that unlatching is arranged at four-way junction of casing carries out open flow, and the volume of open flow gas is calculated by flowmeter；By pressure change after pressure sensor monitoring open flow, the stopping open flow being arranged at valve, continue through liquid level monitor and monitor the liquid level in current annular space to judge whether annular space has leakage.
Description
Technical field
The present invention relates to a kind of well performance testing technical field, a kind of sustained casing pressure diagnosis device and side are referred in particular to
Method.
Background technology
When well performance testing is carried out, in order to prevent corrosive gas (such as H in drilling well2S) leak into annular space,
Generally sleeve pipe can all be protected by the way of filling ring control protection liquid, prevent corrosive gas from corruption is gathered near well head
Erosion sleeve pipe.
But in the prior art, produce well because of general smooth gas field and generally contain H2S gases are higher, part up to more than 10%.Gao Han
Sulphur gas is leaked into annular space, is built up near well head, finally corrodes sleeve pipe.The method of the filling annular protective liquid that early stage is used,
Sleeve pipe is protected.
But this mode be likely due to situations below cause protection liquid annular space cannot be protected：Flow string oozes
Leakage causes annular protective liquid absorption well, casing string that seepage occurs causes annular protective liquid absorption well, annular protective liquid not to fill completely
Well, the unqualified well of annular protective liquid performance indications.Find there is above-mentioned leakage and let out mainly due to annular space after analysis
Leakage.Therefore how to monitor whether annular space there occurs that leakage and the degree for leaking are most important for keeping the safety in production.
The content of the invention
It is more reasonable the purpose of the present invention is to propose to a kind of structure for defect present in prior art and deficiency, it is existing
Field operation is more convenient directly perceived, and can monitor the sustained casing pressure diagnosis device and method whether annular space is revealed.
In order to achieve the above object, the present invention proposes a kind of sustained casing pressure diagnosis device, including：：For monitoring pressure
Pressure sensor, the flowmeter for monitoring open flow flow；One four-way is wherein installed at surface casing pressure cock, four lead to
Connect the ejecting gun of liquid level monitor for annulus liquid level monitoring, the pressure sensor for monitoring pressure and for deflating
High pressure line valve；Flowmeter and pressure sensor are housed on high pressure line valve.
Wherein, the liquid level monitor includes the sonic generator for launching acoustic signals, for receiving the sound for returning
The acoustic receiver of ripple signal, for the wave filter that the signal to the return is filtered, and for according to the filtering
The processor of the filtered signal acquisition level information of device.
Wherein, the wave filter is low-frequency filter and high frequency filter；The low-frequency filter and high frequency filter point
The acoustic receiver is not electrically connected so that the signal that the acoustic receiver will be received is separately sent to the low frequency filtering
Device and high frequency filter；The low-frequency filter and high frequency filter are electrically connected the processor.
Wherein, the impulse generator includes：Ejecting gun for producing sound wave pulse, ejecting gun is by pressure in annular space
Differential pressure action between ejecting gun produces sound wave.
Wherein, the ejecting gun is provided with inflation inlet, air venting mouthful, and acoustic signals emission port, the inflation inlet and
Air venting mouthful is turned on by the inner chamber, the control sound wave is provided with the ejecting gun acoustic signals emission port and is opened/is closed
The valve for closing.
The embodiment of the present invention also proposed a kind of applies that device as described in preceding any one is with pressure to annular space to be diagnosed
Method, including：
Step 1, the liquid level in current oil well pipe and annular space is monitored by liquid level monitor, and according to liquid level apart from well
The altimeter of mouth calculates the volume of current annular space；
The valve that step 2, unlatching are arranged at four-way junction of casing carries out open flow, and the body of open flow gas is calculated by flowmeter
Product
Step 3, by the pressure sensor monitoring open flow that is arranged at valve, stop open flow after pressure change, persistently lead to
Cross liquid level monitor and monitor the liquid level in current annular space to judge whether annular space has leakage.
Step 4, changed according to oil well and annular pressure, and level change in each annular space, determine oil well and each ring
Whether revealed between sky.
Step 5, according to monitoring annular space volume and pressure requirements, determine nitrogen injection amount.
The beneficial effect of technical scheme provided in an embodiment of the present invention is：Apparatus and method proposed by the present invention, can be right
Production gas well annular space is monitored, and the corrosion and damage caused to sleeve pipe is revealed to prevent annular space from giving vent to.Structure letter of the present invention simultaneously
It is single, it is easy to promote at the scene, without increasing excessive equipment.
Brief description of the drawings
Fig. 1 is liquid level monitoring operating diagram；
Fig. 2 is the structural representation of the embodiment of the present invention；
Fig. 3 is the schematic flow sheet of the annular space diagnostic method with pressure of the embodiment of the present invention.
Specific embodiment
The preferred embodiment of the present invention one is described further below in conjunction with the accompanying drawings.
The present invention proposes a kind of sustained casing pressure diagnosis device, including：Pressure sensor for monitoring pressure, for supervising
The flowmeter of measuring jet flow amount.One four-way is wherein installed at surface casing pressure cock, four connect for annulus liquid level monitoring
Ejecting gun, the pressure sensor for monitoring pressure, and for the high pressure line valve of open flow, filled on high pressure line valve
There are flowmeter and pressure sensor.
As shown in Figure 2, the system is included：
The cock 1 of four-way junction of casing：Diagnosed at from this, the wellhead equipment employed is minimum, most convenient；
Four-way 2：Interface with cock 1 will be matched, usually AC clinchings high, or 1/2 " NPT buttons；
Pressure sensor 3：For monitoring surface casing pressure.The general casing pressure that at least monitor A annular spaces and B annular spaces.Oil pressure can
Directly read out by oil pressure gauge；
Liquid level monitoring equipment 4：For monitoring liquid level, depending on monitoring number of times as needed, monitor once simultaneously within general one hour
Record analysis；
Cock 5：For monitoring during liquid level, sealing monitoring passage；
Cock 6：For adjusting flow, using with 0.5 " needle valve；
Flowmeter 7：For monitoring flow.It is accurate in order to monitor, can be with different ranges it is standby.Range ability is in 10-
5000m3/d。
Chromacoder 8：For the signal that pressure sensor and flowmeter are monitored is converted into the recognizable number of computer
Word signal；
Terminal processes 9：Mapped by computer software, Monitoring Data is shown, so as to care diagnostic.
Open flow 10：H will be contained2The gas of S guides to open flow outside well site.
Hole cover 11：Hole cover is measured to the space of four way cock, to judge whether to need to be turned to ejecting gun.
Typically, vertically it is connected on when on cock, monitoring effect is best.But during limited space, it has to which ejecting gun conversion is in a horizontal position
Ensureing that rifle can be installed.
Well site 12：Cock 6 and flowmeter 7 are guided to outside well site, convenient operation.
As shown in figure 1, the liquid level monitoring dress includes：For produce sound wave pulse ejecting gun 11, for and
The nitrogen gas cylinder or dioxide bottle 102 of the ejecting gun, the monitor 13 for reception processing acoustic signals are connected, is monitored
Instrument 13 is connected by line with ejecting gun 11.Ejecting gun 11 is fixed on four-way.
When in use, a sound wave pulse can be produced by ejecting gun, sound wave pulse is formed to gas in sleeve pipe.Sound wave
Propagated in gas in sleeve pipe, some can be anti-in the place of oil connection, tubing anchor and cased perforated uiform section change
It is emitted back towards coming；Another part is then reflected at gas-liquid interface.After the receiver pulse receiver of well head receives reflected signal,
By being sent to processor after filters filter.
Because sound wave pulse signal is propagated in gas, it is to differ to run into the energy that the barrier of Different Rule fires back
Sample.It can be low-frequency filter and high frequency filter to be set to binary channels, i.e. filter；The low-frequency filter and high frequency are filtered
Ripple device is electrically connected the acoustic receiver so that the signal that the receiver will be received is separately sent to the low frequency filter
Ripple device and high frequency filter；The low-frequency filter and high frequency filter are electrically connected the processor.Wherein, low frequency filtering
Device and high frequency filter connect an amplifying circuit respectively, to carry out signal amplification.Can thus liquid level monitoring carried out
Meanwhile, also box cupling or other barriers in monitoring well.
Wherein, the ejecting gun is provided with inflation inlet, air venting mouthful, and acoustic signals emission port, the inflation inlet and
Air venting mouthful is turned on by the inner chamber, the control sound wave is provided with the ejecting gun acoustic signals emission port and is opened/is closed
The valve for closing.
Operationally, ejecting gun is fixed on four-way, and ejecting gun sends acoustic signals by differential pressure action.Acoustic signals are anti-
It is fed back to there are two group informations, one group is sleeve pipe (drill string) box cupling signal, and one group is liquid level signal.Connect by the microphone of ejecting gun
Receive, feed back to filters filter clutter, message handler treatment amplification.Processor is dual path processor, a passage treatment
Sleeve pipe (drill string) box cupling signal, another passage processes liquid level signal.Last this two groups of signal transactings are printed into two suite money,
Engineering staff reads curve, calculates level.
Wherein, the liquid level monitor of the embodiment of the present invention, its operation principle is：
Transmission signal：Ejecting gun produces sound wave to propagate in the wellbore, reflect by differential pressure action.
Reception processing：Liquid level monitor is connected by line with ejecting gun, receives box cupling, barrier or liquid level reflected signal
And process respectively.
Signal interpretation：Liquid level position is found by monitoring curve, and calculates level.
Wherein, the mode for calculating level mainly has two methods：
Box cupling method：Liquid level signal and box cupling signal are contrasted with actual downhole pipe string.
Sound velocity method：By temperature T, pressure P and gas phase composition etc., calculate velocity of sound v, recycle on monitoring curve when
Between t, so as to calculate liquid level position H.It is from top to bottom change because of well temperature, it is considered to during gas column pressure, pressure is also change,
Accurately liquid level position is calculated, it is necessary to carry out numerical computations.
The embodiment of the present invention also includes：Four-way：Four-way is connected on cock, and its effect is as follows：By the installation position of ejecting gun
Put by vertically becoming level, to ensure that restricted clearance can install ejecting gun；Gas in annular space is carried out by connecting high pressure line
Open flow；Pressure sensor monitoring annular pressure is installed.
Four-way inner via hole 5-8mm, the anti-sulphur of material requirement.According to the general smooth existing production tree cock type in gas field, can be by four-way
Connect the button-type at cock and be processed into 1/2 " NPT, then do one 1/2 " mother NPT turn M20 × 1.5 it is male and one 1/2 " NPT is female turns 11/
8 " two AE public joints, joint material is as four-way.
Pressure gauge (pressure sensor)：The anti-sulphur of pressure gauge requirement.Pressure rank is 50MPa.Pressure gauge will have line to be connected to
Computer, can simultaneously carry out data conversion.
Gas flowmeter：At four-way connection high pressure line.When considering downhole gas column volume and being diluted in air
Flow, and open flow time, so that it is determined that flowmeter range.Because there is the adjustable governor pressure of cock before pressure gauge, the table
Bearing capacity is less demanding, 30MPa.Flowmeter range ability is according to gas volume situation in annular space and open flow speed
Fixed, the gas flowmeter that scene is ready for different ranges is standby.
High pressure line：Pressure rank 50MPa, the anti-sulphur of material.Length will enough be connected to open flow outside well site.To have three simultaneously
Lead to fill cock and flowmeter.Because gas is released by the cock on drilling spool, pipeline internal diameter 5-
8mm.Also to be furnished with high-voltage quick joint simultaneously.
Needle valve (cock)：For adjusting open flow flow.Meanwhile, requiring there is sealing passage during liquid level monitoring, the valve is used for
Block the other end of four-way.The anti-sulphur of material requirement, pressure rank is 50MPa.
The embodiment of the present invention also proposed a kind of foregoing device method that is diagnosed with pressure to annular space of application, its flow
As shown in Figure 3, including：
Step 1, the liquid level in current oil well pipe and annular space is monitored by liquid level monitor, and according to liquid level apart from well
The altimeter of mouth calculates the volume of current annular space；
The valve that step 2, unlatching are arranged at four-way junction of casing carries out open flow, and the body of open flow gas is calculated by flowmeter
Product
Step 3, by the pressure sensor monitoring open flow that is arranged at valve, stop open flow after pressure change, persistently lead to
Cross liquid level monitor and monitor the liquid level in current annular space to judge whether annular space has leakage.
Step 4, changed according to oil well and annular pressure, and level change in each annular space, determine oil well and each ring
Whether revealed between sky.
Step 5, according to monitoring annular space volume and pressure requirements, determine nitrogen injection amount.
Certainly, the present invention can also have other embodiment, in the case of without departing substantially from spirit of the invention and its essence, affiliated skill
The technical staff in art field works as can make various corresponding changes and deformation, but these corresponding changes and deformation according to the present invention
Scope of the claims of the invention should all be belonged to.
Claims (5)
1. a kind of application sustained casing pressure diagnosis device method for being diagnosed with pressure to annular space, including：
Step 1, the liquid level in current oil well pipe and annular space is monitored by liquid level monitor, and according to liquid level apart from well head
Altimeter calculates the volume of current annular space；
The valve that step 2, unlatching are arranged at four-way junction of casing carries out open flow, and the volume of open flow gas is calculated by flowmeter；
Step 3, by the pressure sensor monitoring open flow that is arranged at valve, stop open flow after pressure change, continue through liquid
Face monitor monitors the liquid level in current annular space to judge whether annular space has leakage；
Step 4, changed according to oil well and annular pressure, and level change in each annular space, determine oil well and each annular space it
Between whether reveal；
Step 5, according to monitoring annular space volume and pressure requirements, determine nitrogen injection amount：
Wherein described sustained casing pressure diagnosis device includes：Pressure sensor for monitoring pressure, for monitoring open flow flow
Flowmeter；One four-way is wherein installed at surface casing pressure cock, four-way is connected to the liquid level monitor of annulus liquid level monitoring
Ejecting gun, the pressure sensor for monitoring pressure and for deflate high pressure line valve；On high pressure line valve
Equipped with flowmeter and pressure sensor.
2. method according to claim 1, it is characterised in that the liquid level monitor is included for launching acoustic signals
Ejecting gun, the receiver for receiving the acoustic signals for returning, for the filtering that the acoustic signals to the return are filtered
Device, and for the processor according to the signal acquisition level information after the filter filtering.
3. method according to claim 2, it is characterised in that the wave filter is low-frequency filter and high frequency filter；
The low-frequency filter and high frequency filter are electrically connected the receiver for receiving the acoustic signals for returning so that institute
State and be separately sent to the low-frequency filter and high frequency for receiving the signal that the receiver of the acoustic signals for returning will be received
Wave filter；The low-frequency filter and high frequency filter are electrically connected the processor.
4. method according to claim 2, it is characterised in that also including connecting the nitrogen gas cylinder or dioxy of the ejecting gun
Change carbon gas cylinder.
5. method according to claim 4, it is characterised in that the ejecting gun is provided with inflation inlet, air venting mouthful, and
Acoustic signals emission port, the inflation inlet and gas pressure relief opening are turned on by inner chamber, at the ejecting gun acoustic signals emission port
It is provided with the valve that the control sound wave is opened/closed.
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| CN201210379885.1A CN103726834B (en) | 2012-10-10 | 2012-10-10 | A kind of sustained casing pressure diagnosis device and method |
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| CN201210379885.1A CN103726834B (en) | 2012-10-10 | 2012-10-10 | A kind of sustained casing pressure diagnosis device and method |
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| CN103726834B true CN103726834B (en) | 2017-05-31 |
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| CN104425045B (en) * | 2013-09-11 | 2017-10-17 | 中国广核集团有限公司 | One loop of nuclear power station pressurizer system information processing method and investigation method |
| CN105089591B (en) * | 2015-06-19 | 2017-09-01 | 中国石油天然气股份有限公司 | Method for determining annular gas-liquid interface of steam injection well |
| CN105971588A (en) * | 2016-06-26 | 2016-09-28 | 江苏省金峰石油机械制造有限公司 | Casing overflow monitoring device |
| CN106768157A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气集团公司 | A kind of pressure acquisition device, hydrodynamic gauge and method |
| CN106595813B (en) * | 2016-12-27 | 2023-12-05 | 中国石油天然气集团公司 | Oil-water interface detector for salt cavern gas storage cavity making and oil-water interface detection method |
| CN106761568B (en) * | 2017-03-10 | 2019-03-29 | 中国石油大学(北京) | A kind of improvement gas well annular space method with pressure |
| CN108765889B (en) * | 2018-04-17 | 2020-08-04 | 中国石油集团安全环保技术研究院有限公司 | Oil and gas production operation safety early warning method based on big data technology |
| CN108729883A (en) * | 2018-04-24 | 2018-11-02 | 中国石油天然气股份有限公司 | Method and device for controlling liquid level of protective liquid |
| CN108678727B (en) * | 2018-05-08 | 2021-08-31 | 中国石油天然气股份有限公司 | Annular space protection liquid supplementing method and device |
| CN108764729A (en) * | 2018-05-29 | 2018-11-06 | 中海油安全技术服务有限公司湛江分公司 | Oil/gas well Integrity Verification manages system |
| CN112798043B (en) * | 2020-12-31 | 2021-10-26 | 北京石油化工学院 | Nondestructive detection device and method for marine oil gas flexible hose annulus |
| US11898437B2 (en) | 2021-12-17 | 2024-02-13 | Saudi Arabian Oil Company | Method and system for determining fluid level change using pressure monitoring of annular gas |
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| US3974690A (en) * | 1975-10-28 | 1976-08-17 | Stewart & Stevenson Oiltools, Inc. | Method of and apparatus for measuring annulus pressure in a well |
| RU2286452C1 (en) * | 2005-05-14 | 2006-10-27 | Общество с ограниченной ответственностью "Астраханьгазпром" | Survey method for well tubing-casing annulus |
| CN101135236A (en) * | 2007-09-18 | 2008-03-05 | 中国石油天然气集团公司 | Collectively monitored throttling and controlling device |
| CN201696021U (en) * | 2010-07-02 | 2011-01-05 | 中国石油集团川庆钻探工程有限公司 | Intelligent centralized monitoring well control system |
| CN202215237U (en) * | 2011-02-18 | 2012-05-09 | 濮阳市百福瑞德石油科技有限公司 | Communicating vessel type well kick leakage qualitative monitor |
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| CN202926319U (en) * | 2012-10-10 | 2013-05-08 | 北京格瑞迪斯石油技术有限公司 | Annulus under-pressure diagnostic device |
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Effective date of registration: 20220701 Address after: No. 199, Huqiao Road, East Industrial District, Xindu District, Chengdu, Sichuan 610500 Patentee after: Sichuan gredis Petroleum Technology Co.,Ltd. Address before: 100102 2608, 22 floor, building 601, Wangjing garden, Chaoyang District, Beijing. Patentee before: Beijing Grand Oil Tech Co.,Ltd. |