CN111577253A - Safe and environment-friendly unconventional gas well effusion testing device and method - Google Patents
Safe and environment-friendly unconventional gas well effusion testing device and method Download PDFInfo
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- CN111577253A CN111577253A CN202010446674.XA CN202010446674A CN111577253A CN 111577253 A CN111577253 A CN 111577253A CN 202010446674 A CN202010446674 A CN 202010446674A CN 111577253 A CN111577253 A CN 111577253A
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 69
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Geochemistry & Mineralogy (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a safe and environment-friendly unconventional gas well effusion testing device and method, wherein the device comprises a pipeline system, an explosion-proof case, a buffer tank, a switch valve, a sensing system and a control unit, wherein the buffer tank, the switch valve, the sensing system and the control unit are positioned in the explosion-proof case. Compared with the prior art, the invention can realize continuous monitoring on the accumulated liquid in the oil pipe and the sleeve well casing of the high-pressure gas well at the same time, utilizes the gas of the high-pressure gas well, generates pulse sound waves by controlling the pressure difference naturally formed in the oil pipe sleeve, realizes the measurement of the accumulated liquid in the well by detecting the pulse reflected sound waves, and has the advantages of no exhaust of tail gas in the test process, safety and environmental protection.
Description
Technical Field
The invention relates to the technical field of unconventional oil and gas resources such as tight sandstone gas, shale gas, natural gas hydrate and the like, in particular to a safe and environment-friendly unconventional gas well effusion testing device and method.
Background
With the increasing energy crisis and the increasing severity of environmental pollution, the demand of people on clean energy is increasingly urgent, and the drainage and production requirements of high-pressure gas wells such as shale gas, sandstone gas and natural gas wells are higher and higher. However, with the development of high-pressure gas wells, when the gas well gas production rate is less than the critical flow rate of the liquid carried in the shaft, liquid loading is formed in the shaft, and the production yield of the gas well is influenced.
For the daily management of high-pressure gas wells, the condition of accumulated liquid in a sleeve and an oil pipe needs to be tested in time. At present, the technology and equipment for continuously testing the accumulated liquid in the casing or the oil pipe in the market are mostly realized by high-pressure gas in an exhaust well, the compact high-pressure gas generally contains corrosive gas components such as hydrogen sulfide, and the like, and an exhaust gas testing mode is gradually forbidden to be used along with the increasing environmental protection requirements.
At present, the technology which meets the requirement of environmental protection and continuously monitors the accumulated liquid in the well casing of the oil pipe of the gas well still belongs to the technical blank. At present, a pressure gauge is generally used for testing a pressure section by descending from an oil pipe, whether the shaft accumulates liquid is judged according to the change of pressure gradient, and the method has the following defects: the test cost is high, the well condition needs frequent tests after being changed, the workload is large, and the field requirements of unconventional oil and gas extraction cannot be met.
Disclosure of Invention
The invention aims to provide a safe and environment-friendly unconventional gas well effusion testing device and method, which are used for realizing automatic and continuous monitoring of gas well wellbore effusion, reducing testing cost and solving the problem of testing high-pressure gas well effusion.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a safe and environment-friendly unconventional gas well effusion testing device which comprises a pipeline system, an explosion-proof case, a buffer tank, a switch valve, a sensing system and a control unit, wherein the buffer tank, the switch valve, the sensing system and the control unit are positioned in the explosion-proof case, the pipeline system comprises an oil pipe connecting pipe, a switch valve air inlet pipe and a sleeve communicating pipe which are positioned in the explosion-proof case, and an oil pipe interface device, a high-pressure pipeline and a sleeve interface device which are positioned outside the explosion-proof case, the oil pipe interface device, the oil pipe connecting pipe, the switch valve air inlet pipe, the buffer tank, the sleeve connecting pipe, the high-pressure pipeline and the sleeve interface device are sequentially communicated, the oil pipe interface device is used for being communicated with an oil pipe opening of a field high-pressure gas well, the sleeve interface device is used for being, The oil pipe pressure sensor, the sleeve pressure sensor and the sleeve microphone are mounted on the sleeve connecting pipe, all parts of the sensing system are electrically connected with the input end of the control unit through control signal lines, and the switch valve is electrically connected with the output end of the control unit through the control signal lines.
Preferably, the control unit includes a battery power supply, a control circuit and a wireless communication module, the control circuit is used for analyzing and calculating the signals collected by the sensing system and controlling the opening and closing of the switch valve, and the wireless communication module is used for receiving an external test instruction.
Preferably, the flameproof chassis is made of stainless steel.
Preferably, the volume of the buffer tank is 300-.
Preferably, the installation position of the air inlet pipe of the switch valve on the buffer tank is higher than that of the sleeve connecting pipe.
The invention also discloses a safe and environment-friendly unconventional gas well effusion testing method, and the safe and environment-friendly unconventional gas well effusion testing device comprises the following steps:
s1, introducing gas in the sleeve into a buffer tank through a sleeve interface device, a high-pressure pipeline and a sleeve connecting pipe, buffering in the buffer tank, connecting an oil pipe interface device with an oil pipe, measuring the pressure in the oil pipe through an oil pipe pressure sensor, and measuring the pressure in the sleeve through a sleeve pressure sensor;
s2, taking the pressure difference in the sleeve pipe higher than the pressure in the oil pipe as a sound wave gas source for testing, controlling the pulse opening time of the switch valve and quickly closing the switch valve according to the difference value between the oil pressure and the sleeve pressure after the testing device receives a testing command, enabling the gas in the buffer tank at the rear end of the switch valve to quickly enter the oil pipe through the switch valve at the moment, and instantly compressing the gas in the annular space at the wellhead of the oil pipe to generate compression shock waves; the acoustic pulse is transmitted to the underground along the oil pipe annulus, and is reflected when encountering an oil pipe coupling and a gas-liquid interface, the acoustic pulse is received by an oil pipe microphone and converted into an electric signal, the electric signal is digitally processed by a control unit, the oil pipe liquid level depth is automatically calculated, and a test result and a curve graph are stored in a data memory of the control unit, so that the test of the oil pipe liquid level is realized;
at the same time, at the other end of the switch valve, because the gas in the buffer tank enters the oil pipe, the volume of the gas in the buffer tank is reduced and the pressure is reduced, the gas consumption is quickly supplemented through a high-pressure pipeline, the gas in the annular space at the well opening of the casing is instantaneously expanded to generate expansion shock waves, the expansion sound waves are reflected at the casing opening and then downwards spread along the annular space of the casing, reflected sound wave pulses are generated when the casing meets a coupling of the oil pipe and a gas-liquid interface, the sound pulses are received by a casing microphone and converted into electric signals, digital processing is performed through a control unit, the depth of the liquid level of the casing is automatically calculated, and a test result and a curve graph are stored in a data memory of the control unit, so that.
Compared with the prior art, the invention has the following technical effects:
1. the testing device provided by the invention has the advantages that the casing gas of the high-pressure gas well is used as a percussion gas source, the test tail gas is discharged into the oil pipe of the well, the liquid level of the casing of the gas well, the liquid level of the oil pipe and the structure of the pipe column can be tested at the same time, and one-shot two-shot testing is realized;
2. the tail gas of the testing device is not discharged outside, so that the gas for testing is circulated in the well, and the gas source is inexhaustible, thereby saving the testing cost and being safe and environment-friendly;
3. the two ends of the testing device are respectively connected with the oil pipe and the casing of the high-pressure gas well, and the one-driving-two mode has the advantages of simple structure, convenient operation, realization of long-term continuous monitoring and great significance for analyzing and mastering the change rule of the accumulated liquid of the gas well;
4. the testing device has two functions of measuring pressure and effusion, the oil pipe and the casing pipe are simultaneously monitored, four parameters can be provided, and the testing device is suitable for various well conditions such as compact and ultra-compact sandstone oil gas, shale oil gas, coal bed gas, water-soluble gas, natural gas and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a safe and environment-friendly unconventional gas well effusion testing device in the embodiment;
description of reference numerals: 1. an oil pipe interface device; 2. an oil pipe connecting pipe; 3. an oil pipe microphone; 4. an oil pipe pressure sensor; 5. an on-off valve; 6. an air inlet pipe of the switch valve; 7. a buffer tank; 8. a casing pressure sensor; 9. a casing microphone; 10. a casing connecting pipe; 11. a control unit; 12. a control signal line; 13. a high pressure line; 14. a cannula interface device; 15. explosion-proof machine case.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a safe and environment-friendly unconventional gas well effusion testing device and method, which are used for realizing automatic and continuous monitoring of gas well wellbore effusion, reducing testing cost and solving the problem of testing high-pressure gas well effusion.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the embodiment provides a safe and environment-friendly unconventional gas well effusion testing device, which includes a pipeline system, an explosion-proof case 15, and a buffer tank 7, a switch valve 5, a sensing system and a control unit 11 which are located in the explosion-proof case 15. The flameproof chassis 15 is preferably made of stainless steel and is used for protecting each device loaded inside.
The pipeline system comprises an oil pipe connecting pipe 2, a switching valve air inlet pipe 6 and a sleeve communicating pipe which are positioned in the flameproof case 15, and an oil pipe interface device 1, a high-pressure pipeline 13 and a sleeve interface device 14 which are positioned outside the flameproof case 15. One end of the oil pipe connecting pipe 2 extends out of the flameproof case 15 and is communicated with the oil pipe interface device 1, the other end of the oil pipe connecting pipe 2 is communicated with one opening of the switch valve 5, the other opening of the switch valve 5 is communicated with one end of the switch valve air inlet pipe 6, the other end of the switch valve air inlet pipe 6 is communicated with one opening of the buffer tank 7, the other opening of the buffer tank 7 is communicated with one end of the sleeve communicating pipe 10, the other end of the sleeve communicating pipe 10 extends out of the flameproof case 15 and is communicated with one end of the high-pressure pipeline 13, and the other end of the high-pressure pipeline 13 is. The high pressure pipeline 13 is preferably a high pressure resistant stainless steel pipe, and the specific length and shape of the high pressure pipeline are different according to the well conditions of the high pressure gas well site. The oil pipe interface device 1 is used for being communicated with an oil pipe opening of a field high-pressure gas well, and the sleeve pipe interface device 14 is used for being communicated with a sleeve pipe opening of the field high-pressure gas well.
Specifically, the buffer tank 7 is used for storing a certain amount of casing gas of the high-pressure gas well, and can instantly provide a sufficient amount of casing high-pressure gas when the switch valve 5 is opened, so as to form pulse impact sound waves. The volume of the buffer tank 7 is preferably 300-400 ml, and the volume of the buffer tank 7 is 350 ml in the embodiment. In order to prevent condensed water of gas in the buffer tank 7 from entering the on-off valve 5 when the temperature is low, in the present embodiment, the on-off valve inlet pipe 6 connected to the buffer tank 7 is installed at a position higher than the bushing connecting pipe 10 connected to the buffer tank 7.
The sensing system comprises an oil pipe microphone 3 arranged on an oil pipe connecting pipe 22, an oil pipe pressure sensor 4, a sleeve pressure sensor 8 and a sleeve microphone 9 which are arranged on a sleeve connecting pipe 10, all the components of the sensing system are electrically connected with the input end of a control unit 11 through a control signal line 12, and a switch valve 5 is electrically connected with the output end of the control unit 11 through the control signal line 12.
Specifically, the tubing microphone 3 and the casing microphone 9 are respectively configured to convert the received pulse wave in the tubing and the received pulse wave in the casing into electrical signals, and the tubing pressure sensor 4 and the casing pressure sensor 8 are respectively configured to collect and measure the pressure in the tubing and the pressure in the casing.
The control unit 11 comprises a battery power supply, a control circuit and a wireless communication module, and the control unit 11 is provided with embedded software. The control circuit is used for collecting reflected sound wave electric signals generated by the oil pipe microphone 3 and the casing pipe microphone 9, analyzing and calculating the electric signals, and finishing the functions of storing, analyzing, automatically calculating depth and the like; on the other hand, for controlling the opening and closing of the on-off valve 5; the wireless communication module is used for receiving an external test instruction and completing various field works. The wireless communication modules are of various types, such as GPRS, Zigbee, WiFi, Bluetooth and the like, and 485 field communication buses, and can be flexibly selected by a person skilled in the art according to actual needs.
The embodiment also provides a safe and environment-friendly unconventional gas well effusion testing method, which uses the safe and environment-friendly unconventional gas well effusion testing device and comprises the following steps:
s1, introducing the gas in the casing into the buffer tank 7 through the casing interface device 14, the high-pressure pipeline 13 and the casing connecting pipe 10, buffering in the buffer tank 7, wherein the pressure in the buffer tank 7 is equal to the casing pressure, connecting the oil pipe interface device 1 with the oil pipe, measuring the pressure in the oil pipe through the oil pipe pressure sensor 4, and measuring the pressure in the casing through the casing pressure sensor 8.
S2, taking the pressure difference in the sleeve higher than the pressure in the oil pipe as a sound wave gas source for testing, controlling the pulse opening time of the switch valve 5 and quickly closing the switch valve according to the difference between the oil pressure and the sleeve pressure after the testing device receives a testing command, enabling the gas in the buffer tank 7 at the rear end of the switch valve 5 to quickly enter the oil pipe through the switch valve 5, and instantly compressing the gas in the annular space at the wellhead of the oil pipe to generate compression shock waves. The acoustic pulse is transmitted underground along the tubing annulus, and when encountering tubing coupling and gas-liquid interface, the acoustic pulse is reflected, and is received by the tubing microphone 3 and converted into an electric signal, the electric signal is digitally processed by the control unit 11, the oil outlet pipe liquid level depth is automatically calculated, and the test result and the curve graph are stored in the data memory of the control unit 11, so that the oil pipe liquid level is tested;
at the same time, at the other end of the switch valve 5, because the gas in the buffer tank 7 enters the oil pipe, the gas pressure in the buffer tank 7 is reduced, the high-pressure gas in the casing rapidly supplements the gas consumption through the high-pressure pipeline 13, and the gas in the annular space at the cased well head is expanded instantaneously to generate expansion shock waves. The expansion sound wave is reflected at the casing opening and then is transmitted downwards along the casing annulus, reflected sound wave pulses are generated when the expansion sound wave meets an oil pipe coupling and a gas-liquid interface, the sound pulses are received by the casing microphone 9 and converted into electric signals, digital processing is carried out through the control unit 11, the casing liquid level depth is automatically calculated, a test result and a curve graph are stored in a data storage device of the control unit 11, and the casing liquid level is tested.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The safe and environment-friendly unconventional gas well effusion testing device is characterized by comprising a pipeline system, a flameproof case, a buffer tank, a switch valve, a sensing system and a control unit, wherein the buffer tank, the switch valve, the sensing system and the control unit are positioned in the flameproof case, the pipeline system comprises an oil pipe connecting pipe, a switch valve air inlet pipe, a sleeve communicating pipe which are positioned in the flameproof case, and an oil pipe interface device, a high-pressure pipeline and a sleeve interface device which are positioned outside the flameproof case, the oil pipe interface device is communicated with the oil pipe connecting pipe, the switch valve air inlet pipe, the buffer tank, the sleeve connecting pipe, the high-pressure pipeline and the sleeve interface device in sequence, the oil pipe interface device is communicated with an oil pipe opening of a field high-pressure gas well, the sleeve interface device is communicated with the sleeve opening of the field high-pressure gas well, the oil pipe pressure sensor, the sleeve pressure sensor and the sleeve microphone are mounted on the sleeve connecting pipe, all parts of the sensing system are electrically connected with the input end of the control unit through control signal lines, and the switch valve is electrically connected with the output end of the control unit through the control signal lines.
2. The safe and environment-friendly unconventional gas well effusion testing device according to claim 1, wherein the control unit comprises a battery power supply, a control circuit and a wireless communication module, the control circuit is used for analyzing and calculating signals collected by the sensing system and controlling the opening and closing of a switch valve, and the wireless communication module is used for receiving an external test instruction.
3. The safe and environment-friendly unconventional gas well effusion testing device of claim 1, wherein the flameproof chassis is made of stainless steel.
4. The safe and environment-friendly unconventional gas well effusion testing device of claim 1, wherein the volume of the buffer tank is 300-.
5. The safe and environment-friendly unconventional gas well effusion testing device according to claim 1, characterized in that the mounting position of the switch valve inlet pipe on the buffer tank is higher than that of the casing connecting pipe.
6. The safe and environment-friendly unconventional gas well effusion testing method is characterized by using the safe and environment-friendly unconventional gas well effusion testing device as claimed in any one of claims 1-4, and comprises the following steps:
s1, introducing gas in the sleeve into a buffer tank through a sleeve interface device, a high-pressure pipeline and a sleeve connecting pipe, buffering in the buffer tank, connecting an oil pipe interface device with an oil pipe, measuring the pressure in the oil pipe through an oil pipe pressure sensor, and measuring the pressure in the sleeve through a sleeve pressure sensor;
s2, taking the pressure difference in the sleeve pipe higher than the pressure in the oil pipe as a sound wave gas source for testing, controlling the pulse opening time of the switch valve and quickly closing the switch valve according to the difference value between the oil pressure and the sleeve pressure after the testing device receives a testing command, enabling the gas in the buffer tank at the rear end of the switch valve to quickly enter the oil pipe through the switch valve at the moment, and instantly compressing the gas in the annular space at the wellhead of the oil pipe to generate compression shock waves; the acoustic pulse is transmitted to the underground along the oil pipe annulus, and is reflected when encountering an oil pipe coupling and a gas-liquid interface, the acoustic pulse is received by an oil pipe microphone and converted into an electric signal, the electric signal is digitally processed by a control unit, the oil pipe liquid level depth is automatically calculated, and a test result and a curve graph are stored in a data memory of the control unit, so that the test of the oil pipe liquid level is realized;
at the same time, at the other end of the switch valve, because the gas in the buffer tank enters the oil pipe, the volume of the gas in the buffer tank is reduced and the pressure is reduced, the gas consumption is quickly supplemented through a high-pressure pipeline, the gas in the annular space at the well opening of the casing is instantaneously expanded to generate expansion shock waves, the expansion sound waves are reflected at the casing opening and then downwards spread along the annular space of the casing, reflected sound wave pulses are generated when the casing meets a coupling of the oil pipe and a gas-liquid interface, the sound pulses are received by a casing microphone and converted into electric signals, digital processing is performed through a control unit, the depth of the liquid level of the casing is automatically calculated, and a test result and a curve graph are stored in a data memory of the control unit, so that.
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| CN115045649A (en) * | 2022-08-16 | 2022-09-13 | 成都铭鉴知源油田工程科技有限公司 | Unconventional gas reservoir oil jacket liquid level continuous monitoring system and method |
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| CN112983395A (en) * | 2021-02-07 | 2021-06-18 | 中国石油天然气股份有限公司 | Differential pressure driven gas well liquid level continuous monitoring system and method |
| CN115045649A (en) * | 2022-08-16 | 2022-09-13 | 成都铭鉴知源油田工程科技有限公司 | Unconventional gas reservoir oil jacket liquid level continuous monitoring system and method |
| CN115045649B (en) * | 2022-08-16 | 2022-10-28 | 成都铭鉴知源油田工程科技有限公司 | Unconventional gas reservoir oil jacket liquid level continuous monitoring system and method |
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