CN117231176A - Intelligent alcohol injection system and method for natural gas well - Google Patents
Intelligent alcohol injection system and method for natural gas well Download PDFInfo
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- CN117231176A CN117231176A CN202311510945.3A CN202311510945A CN117231176A CN 117231176 A CN117231176 A CN 117231176A CN 202311510945 A CN202311510945 A CN 202311510945A CN 117231176 A CN117231176 A CN 117231176A
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- 238000000034 method Methods 0.000 title claims abstract description 97
- 238000002347 injection Methods 0.000 title claims abstract description 89
- 239000007924 injection Substances 0.000 title claims abstract description 89
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000002343 natural gas well Substances 0.000 title claims abstract description 76
- 239000007789 gas Substances 0.000 claims abstract description 117
- 230000001105 regulatory effect Effects 0.000 claims abstract description 95
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 60
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003345 natural gas Substances 0.000 claims abstract description 15
- 230000001276 controlling effect Effects 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims description 17
- 230000007613 environmental effect Effects 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
The invention provides an intelligent alcohol injection system and a method thereof for natural gas wells, wherein the alcohol injection system comprises a data acquisition control unit, the data acquisition control unit is connected with an electric regulating valve, the output end of the electric regulating valve is respectively connected with a plurality of natural gas wells through alcohol injection pipelines, and each natural gas well is connected into a gas collecting station through a gas collecting pipeline; methanol is conveyed to a natural gas well for injecting alcohol through an electric regulating valve by an alcohol injection pipeline, and natural gas of the natural gas well and the methanol are conveyed to a gas collecting station through a gas collecting pipeline; the data acquisition control unit is connected with the alcohol injection pipeline and the gas collecting pipeline simultaneously and is used for acquiring a pipeline pressure value, a gas flow value and an environment temperature value, analyzing and judging the gas flow value, the environment temperature value and the pipeline pressure value, and then automatically regulating and controlling the electric regulating valve to control the alcohol injection quantity of the corresponding natural gas well. According to the invention, the pipeline pressure value, the gas flow value and the environment temperature value are taken as control target values, and the valve opening of the electric regulating valve is automatically regulated to realize accurate control of the alcohol injection quantity.
Description
Technical Field
The invention belongs to the technical field of natural gas production of oil and gas fields, and particularly relates to an intelligent alcohol injection system and method for a natural gas well.
Background
The natural gas is called green energy, is clean and high-efficiency high-quality fuel, most countries in the world use natural gas as the preferred fuel, the proportion of the natural gas in energy supply is increased, and the development speed of the natural gas is accelerated.
The winter temperature of the area where the long-term gas field is produced in China is low, the average temperature is minus 15 ℃, the duration is long, the duration is generally 11 months to 3 months in the next year, and the wellhead pressure of the natural gas well is generally high and is above 12MPa on average, so that the production pipe column and the well field pipeline of the natural gas well are easy to form hydrate to be blocked in the winter production process, and the continuous production of the natural gas well is affected.
At present, the thermodynamic conditions of the formation of the natural gas hydrate are generally changed by adopting a mode of pushing methanol, so that the equilibrium temperature and the equilibrium pressure of the formation of the hydrate are reduced to inhibit the formation of the hydrate, the formation of the hydrate in a production string and a well site pipeline of the natural gas well is often prevented by adopting a mode of transporting an injection vehicle, but the mode not only consumes time and labor, but also consumes larger injection amount and has higher injection cost.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an intelligent alcohol injection system of a natural gas well and a method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an intelligent alcohol injection system for a natural gas well is characterized in that: the system comprises a data acquisition control unit, wherein the data acquisition control unit is connected with an electric regulating valve, the input end of the electric regulating valve is connected with an alcohol injection pipeline for methanol to enter, the output end of the electric regulating valve is respectively connected with a plurality of natural gas wells through the alcohol injection pipeline, and each natural gas well is connected into a gas collecting station through a gas collecting pipeline; methanol is conveyed to a natural gas well for injecting alcohol through the electric regulating valve by an alcohol injection pipeline, and natural gas of the natural gas well and the methanol are conveyed to a gas collecting station through a gas collecting pipeline; the data acquisition control unit is connected with the alcohol injection pipeline and the gas collecting pipeline at one end of the natural gas well and is used for acquiring the pipeline pressure value of the alcohol injection pipeline, the gas flow value of the gas collecting pipeline and the environment temperature value of the gas collecting pipeline, analyzing and judging the gas flow value, the environment temperature value and the pipeline pressure value, and then operating an intelligent control algorithm to automatically regulate and control the electric regulating valve to control the alcohol injection quantity of the corresponding natural gas well.
Further, the solar energy power supply system is used for supplying power to the data acquisition control unit and the electric regulating valve.
Further, the alcohol injection pipeline is connected with a pressure gauge for monitoring the pressure value of the pipeline, and the gas collecting pipeline is connected with a gas flowmeter for monitoring the ambient temperature value and the natural gas flow value; the data acquisition control unit is electrically connected with the pressure gauge and the gas flowmeter.
Further, the invention also provides an intelligent alcohol injection method for the natural gas well, which is characterized in that: an intelligent control algorithm is operated on the data acquisition control unit to automatically regulate and control the valve opening of the electric regulating valve to control the alcohol injection quantity; the intelligent control algorithm comprises a safety threshold method, a pressure control method, a gas flow control method and a temperature control method, wherein the safety threshold method is used for controlling the valve opening of the electric regulating valve according to whether the pipeline pressure value exceeds a safety threshold or not by the data acquisition control unit, and when the pipeline pressure value exceeds the safety threshold, the valve opening of the electric regulating valve is maximum, and when the pipeline pressure value is below the safety threshold, the data acquisition control unit runs the pressure control method, the gas flow control method or the temperature control method;
the pressure control method is that a data acquisition control unit controls the valve opening of the electric regulating valve according to the change trend of the pipeline pressure value, when the pipeline pressure value is increased, the valve opening of the electric regulating valve is increased, and when the pipeline pressure value is decreased, the valve opening of the electric regulating valve is decreased;
the gas flow control method is that a data acquisition control unit controls the valve opening of the electric regulating valve according to the change trend of the gas flow value, when the gas flow value is increased, the valve opening of the electric regulating valve is reduced, and when the gas flow value is reduced, the valve opening of the electric regulating valve is increased;
the temperature control method is that a data acquisition control unit controls the valve opening of an electric regulating valve according to the change trend of an environmental temperature value; when the ambient temperature value rises, the valve opening of the electric regulating valve is reduced, and when the ambient temperature value falls, the valve opening of the electric regulating valve is increased.
Further, the safety threshold method is used for regulation and control, and specifically comprises the following steps:
the upper limit of the pipeline pressure value is a safety threshold value of the data acquisition control unit; when the pipeline pressure value exceeds the safety threshold value, the data acquisition control unit controls the valve opening of the electric regulating valve to be regulated and controlled to be maximum; and when the pipeline pressure value is below a safety threshold value, the data acquisition control unit operates a pressure control method, a gas flow control method or a temperature control method to control the valve opening of the electric regulating valve.
Further, the pressure control method specifically comprises the following steps:
when the pressure value of the pipeline gradually rises, the data acquisition control unit controls the valve opening of the electric regulating valve to increase by a stepping value;
when the pressure value of the pipeline is stable and unchanged, the data acquisition control unit controls the valve opening of the electric regulating valve to be unchanged;
when the pressure value of the pipeline gradually decreases, the data acquisition control unit controls the valve opening of the electric regulating valve to decrease by a stepping value.
Further, the gas flow control method specifically comprises the following steps:
when the gas flow value is increased and the pipeline pressure value is gradually reduced, the data acquisition control unit step-by-step controls the valve opening of the electric regulating valve to be reduced;
when the gas flow value is reduced and the pipeline pressure value is gradually increased, the data acquisition control unit step-by-step controls the valve opening of the electric regulating valve to be increased;
when the gas flow value is stable and the pipeline pressure value is stable at the same time, the data acquisition control unit controls the current valve opening of the electric regulating valve to be unchanged.
Further, the temperature control method specifically comprises the following steps:
when the environmental temperature value rises and the pipeline pressure value is kept stable, the data acquisition control unit controls the valve opening of the electric regulating valve to be reduced in a stepping way;
when the environmental temperature value is reduced and the pipeline pressure value is increased, the data acquisition control unit step-by-step controls the valve opening of the electric regulating valve to be increased;
when the environmental temperature value is stable and the pipeline pressure value is stable at the same time, the data acquisition control unit controls the valve opening of the electric regulating valve to be unchanged.
Further, the step amount of the step is 10%.
By adopting the technical scheme, the invention has the following advantages and effects:
according to the intelligent alcohol injection system and the intelligent alcohol injection method for the natural gas well, provided by the invention, the pipeline pressure value, the gas flow value and the environmental temperature value of the pipeline of the natural gas well are taken as control target values, and the valve opening of the electric regulating valve is automatically regulated and controlled by adopting a safety threshold method, a pressure control method, a gas flow control method and a temperature control method, so that the automatic regulation of the alcohol injection amount is realized, the icing of the pipeline of the natural gas well can be prevented, the accurate alcohol injection amount control is realized, the purposes of reducing the cost and enhancing the efficiency are achieved, the methanol consumption of the natural gas well in winter operation is greatly reduced, and the production economic benefit of a gas field is improved.
According to the intelligent alcohol injection system and the intelligent alcohol injection method for the natural gas well, provided by the invention, through collecting parameter data of pipeline pressure values, gas flow values and environment temperature values of a pipeline of a well site and realizing a remote transmission function of the parameter data, the parameter data can be fed back to a remote control monitoring platform, scientific basis is provided for intelligent analysis and intelligent decision-making of gas field production, meanwhile, the alcohol injection system can receive intelligent control instructions of the remote control monitoring platform or an SCADA (Supervisory Control And Data Acquisition) system of an oil field, namely data collection and monitoring control) system, and the intelligent alcohol injection system is matched with the accurate alcohol injection of the pipeline of the whole well site, so that the task requirement of simultaneous well production is realized, the whole process does not need to be manually participated, the problems that the natural gas well cannot be continuously produced in a well, and labor tension and alcohol injection equipment are low in automation degree are effectively solved, and the intelligent equipment level of gas field production is improved.
Drawings
FIG. 1 is a schematic diagram of a natural gas well intelligent alcohol injection system.
FIG. 2 is a flow chart of a safety threshold method of the intelligent alcohol injection method of the natural gas well.
FIG. 3 is a flow chart of a pressure control method of the intelligent alcohol injection method of the natural gas well.
FIG. 4 is a flow chart of a gas flow control method of the intelligent alcohol injection method of the natural gas well.
FIG. 5 is a flow chart of a temperature control method of an intelligent alcohol injection method for a natural gas well.
The reference numerals are: the system comprises a 1-solar power supply system, a 2-data acquisition control unit, a 3-electric regulating valve, a 4-pressure gauge, a 5-gas flowmeter, a 6-natural gas well and a 7-gas collecting station.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but rather are merely illustrative of the true spirit of the invention.
As shown in fig. 1. The invention provides an intelligent alcohol injection system of a natural gas well and a method thereof, wherein a data acquisition control unit 2 is connected to an electric regulating valve 3 of a well site pipeline, the data acquisition control unit 2 takes a pipeline pressure value, a gas flow value and an environment temperature value of the well site pipeline as control target values, the data acquisition control unit 2 acquires parameter data of the pipeline pressure value, the gas flow value and the environment temperature value, and the valve opening of the electric regulating valve 3 is automatically regulated and controlled by operating an intelligent control algorithm after comprehensively analyzing and judging the parameter data so as to control the alcohol injection amount of a corresponding natural gas well 6. The invention can realize accurate alcohol injection control, achieve the aims of reducing cost and enhancing efficiency, greatly reduce the consumption of methanol for the winter operation of the natural gas well and improve the production economic benefit of the gas field.
The embodiment of the invention provides an intelligent alcohol injection system for natural gas wells, which comprises a data acquisition control unit 2, wherein the data acquisition control unit 2 is connected with an electric regulating valve 3, the input end of the electric regulating valve 3 is connected with an alcohol injection pipeline for methanol to enter, the output end of the electric regulating valve 3 is respectively connected with a plurality of natural gas wells 6 through the alcohol injection pipeline, and each natural gas well 6 is connected with a gas collecting station 7 through a gas collecting pipeline; methanol is conveyed to a natural gas well 6 for injecting alcohol through an alcohol injection pipeline through an electric regulating valve 3, and natural gas produced by the natural gas well 6 is conveyed to a gas collecting station 7 through a gas collecting pipeline together with the methanol; the data acquisition control unit 2 is connected with an alcohol injection pipeline and a gas collecting pipeline at one end of the natural gas well 6 at the same time, and is used for acquiring a pipeline pressure value of the alcohol injection pipeline, a gas flow value of the gas collecting pipeline and an environment temperature value of the gas collecting pipeline, analyzing and judging the gas flow value, the environment temperature value and the pipeline pressure value, and then operating an intelligent control algorithm to automatically regulate and control the electric regulating valve 3 to control the alcohol injection quantity of the corresponding natural gas well 6.
Further, the intelligent natural gas well alcohol injection system further comprises a solar power supply system 1, the solar power supply system 1 supplies power to the data acquisition control unit 2 and the electric regulating valve 3, the electric regulating valve 3 is connected with a plurality of natural gas wells 6 in parallel through well site pipelines, and each natural gas well 6 is connected with a gas collecting station 7 after being connected in parallel through the well site pipelines.
Further, the alcohol injection pipeline and the gas collecting pipeline form a well site pipeline, the alcohol injection pipeline is connected with a pressure gauge 4 for monitoring the pressure value of the pipeline, and the gas collecting pipeline is connected with a gas flowmeter 5 for monitoring the ambient temperature value and the natural gas flow value; the data acquisition control unit 2 is electrically connected with the pressure gauge 4 and the gas flowmeter 5.
Specifically, each natural gas well 6 is connected to the electric control valve 3 through an injection line, each natural gas well 6 is connected to the gas collecting station 7 through a gas collecting line, and the injection line of each natural gas well 6 is simultaneously communicated with the gas collecting line. Connect on every annotate the alcohol pipeline manometer 4, manometer 4 is used for monitoring the pipeline pressure value of annotating the alcohol pipeline, connects the gas flowmeter 5 of monitoring natural gas flow value on every gas collecting pipe, still installs 2 temperature sensor on every gas flowmeter 5 simultaneously, and 2 temperature sensor can gather the ambient temperature value of well site pipeline, guarantees measuring temperature's accuracy and stability. The gas flowmeter 5 and the pressure gauge 4 are powered by the solar power supply system 1.
When the methanol is injected, the methanol is conveyed to a well site through the plunger pump by the methanol injection station through the methanol injection pipeline, and is respectively conveyed to the well heads of the natural gas wells 6 after passing through the electric regulating valve 3, the natural gas produced by the natural gas wells 6 is metered through the gas flowmeter 5 of the gas collecting pipeline and then is conveyed to the gas collecting station 7 through the gas collecting pipeline together with the methanol, then the gas and the liquid are separated, the natural gas enters the gas storage tank for storage, and the methanol is recycled.
Further, the data acquisition control unit 2 communicates with the pressure gauge 4 and the gas flow meter 5 through an RS485 bus. The data acquisition control unit 2 acquires parameter data of pipeline pressure values, gas flow values and environment temperature values corresponding to each natural gas well 6, and automatically regulates and controls the valve opening of the electric regulating valve 3 through operating an intelligent control algorithm after comprehensively analyzing and judging the parameter data so as to control the alcohol injection quantity of the corresponding natural gas well 6.
The data acquisition control unit 2 performs data interaction with the remote control monitoring platform at the same time, so that remote monitoring of well site data is realized, and the remote control command issued by the remote control monitoring platform can be responded, so that optimized production is realized.
Further, an intelligent control algorithm is operated on the data acquisition control unit 2, and the valve opening of the electric regulating valve 3 is automatically regulated and controlled through the intelligent control algorithm. The intelligent control algorithm comprises a safety threshold method, a pressure control method, a gas flow control method and a temperature control method, the data acquisition control unit 2 controls the electric control valve 3 by operating the safety threshold method in priority, and then the electric control valve 3 is controlled by operating the pressure control method, the gas flow control method or the temperature control method in second level.
As shown in fig. 2-5. The invention also provides an intelligent alcohol injection method for the natural gas well, which is applied to the intelligent alcohol injection system, and specifically comprises the following steps: the intelligent control algorithm is operated on the data acquisition control unit 2 to automatically regulate the electric regulating valve 3 to control the alcohol injection amount, the intelligent control algorithm comprises a safety threshold method, a pressure control method, a gas flow control method and a temperature control method, the safety threshold method is used for controlling the valve opening of the electric regulating valve 3 according to whether the pipeline pressure value exceeds the safety threshold or not by the data acquisition control unit 2, when the pipeline pressure value exceeds the safety threshold, the valve opening of the electric regulating valve 3 is maximum, and when the pipeline pressure value is below the safety threshold, the data acquisition control unit 2 is operated with the pressure control method, the gas flow control method or the temperature control method;
the pressure control method is that the data acquisition control unit 2 controls the valve opening of the electric control valve 3 according to the change trend of the pipeline pressure value, when the pipeline pressure value is increased, the valve opening of the electric control valve 3 is increased, and when the pipeline pressure value is decreased, the valve opening of the electric control valve 3 is decreased;
the gas flow control method is that the data acquisition control unit 2 controls the valve opening of the electric control valve 3 according to the change trend of the gas flow value, when the gas flow value is increased, the valve opening of the electric control valve 3 is reduced, and when the gas flow value is reduced, the valve opening of the electric control valve 3 is increased;
the temperature control method is that the data acquisition control unit 2 controls the valve opening of the electric regulating valve 3 according to the change trend of the environmental temperature value; when the ambient temperature value rises, the valve opening of the electric control valve 3 is reduced, and when the ambient temperature value falls, the valve opening of the electric control valve 3 is increased;
and the priority level is used for controlling the safety threshold method, and the second level is used for controlling the pressure control method, the gas flow control method or the temperature control method.
Further, when the safety threshold method is operated to perform regulation, an upper limit value of the pipeline pressure value of the alcohol injection pipeline corresponding to each natural gas well 6 is set first, and the upper limit value is a safety threshold value of the pipeline pressure value. The safety threshold value is issued by a remote control monitoring platform, and the priority level of the safety threshold value method is highest.
When the data acquisition control unit 2 monitors that the pipeline pressure value of the alcohol injection pipeline of the corresponding natural gas well 6 exceeds a safety threshold, the data acquisition control unit 2 controls the valve opening of the electric regulating valve 3 on the alcohol injection pipeline to be regulated and controlled to be maximum;
when the pipeline pressure value monitored by the data acquisition control unit 2 is below a safety threshold value, the data acquisition control unit 2 operates a pressure control method, a gas flow control method or a temperature control method to control the valve opening of the electric regulating valve 3.
Further, when the operation pressure control method is regulated and controlled, after the data acquisition control unit 2 acquires the pipeline pressure value of the alcohol injection pipeline corresponding to each natural gas well 6 in real time, the pipeline pressure value is firstly subjected to algorithm average filtering and then is stored and judged, and the pipeline pressure value after the algorithm average filtering is taken as a monitoring value.
When the pressure value of the pipeline gradually rises, the data acquisition control unit 2 starts to control the valve opening of the electric regulating valve 3 to be increased by a step value of 3 percent, so that the alcohol injection quantity is increased to prevent the freezing and blocking of the alcohol injection pipeline;
when the pipeline pressure value is stable and unchanged, the data acquisition control unit 2 controls the valve opening of the electric regulating valve 3 to be unchanged, so that the alcohol injection amount is kept stable and unchanged;
when the pipeline pressure value gradually decreases, the data acquisition control unit 2 controls the valve opening of the electric regulating valve 3 to decrease by a stepping value of 3 percent, so that the alcohol injection amount is saved.
The rising and falling amplitude of the pipeline pressure value and the safety threshold for triggering and starting the electric regulating valve 3 are issued by a remote control monitoring platform, the data acquisition control unit 2 can continuously learn and optimize, and automatically refresh and judge the safety threshold.
Further, when the gas flow control method is operated to regulate and control, the data acquisition control unit 2 acquires the gas flow value measured by the gas flowmeter 5 on the gas collecting pipeline corresponding to each natural gas well 6 in real time, and analyzes and judges the data of the gas flow value:
when the gas flow value is increased and the pipeline pressure value is gradually reduced, the data acquisition control unit 2 stepwise controls the valve opening of the electric regulating valve 3 to be reduced by 10% of stepping amount, so that the alcohol injection amount is reduced;
when the gas flow value is reduced and the pipeline pressure value is gradually increased, the data acquisition control unit 2 stepwise controls the valve opening of the electric regulating valve 3 to be increased by 10% of stepping amount, so that the alcohol injection amount is increased;
when the gas flow value is stable and the pipeline pressure value is also stable and unchanged, the data acquisition control unit 2 controls the electric regulating valve 3 to keep the current valve opening unchanged.
Further, when the operation temperature control method is regulated and controlled, the data acquisition control unit 2 acquires the environmental temperature value measured by the gas flowmeter 5 on the gas collecting pipeline corresponding to each natural gas well 6 in real time, and stores and judges the environmental temperature value after the algorithm average filtration, and takes the environmental temperature value after the algorithm average filtration as a monitoring value.
When the environmental temperature value rises by 3 ℃, the data acquisition control unit 2 judges the change of the current pipeline pressure value, and when the pipeline pressure value is kept stable, the data acquisition control unit 2 controls the valve opening of the electric regulating valve 3 to be reduced by 10% of the stepping amount, so that the alcohol injection amount is reduced;
when the environmental temperature value is reduced by 3 ℃ and the pipeline pressure value is increased, the data acquisition control unit 2 controls the valve opening of the electric regulating valve 3 to be increased by 10% of the stepping amount, so that the alcohol injection amount is increased;
when the ambient temperature value is stable and the pipeline pressure value is also stable and unchanged, the data acquisition control unit 2 controls the electric regulating valve 3 to keep the current valve opening unchanged.
Claims (9)
1. An intelligent alcohol injection system for a natural gas well is characterized in that: the device comprises a data acquisition control unit (2), wherein the data acquisition control unit (2) is connected with an electric regulating valve (3), the input end of the electric regulating valve (3) is connected with an alcohol injection pipeline for methanol to enter, the output end of the electric regulating valve (3) is respectively connected with a plurality of natural gas wells (6) through the alcohol injection pipeline, and each natural gas well (6) is connected into a gas collecting station (7) through a gas collecting pipeline; methanol is conveyed to a natural gas well (6) for injecting alcohol through an alcohol injection pipeline by the electric regulating valve (3), and natural gas of the natural gas well (6) is conveyed to a gas collecting station (7) together with the methanol through a gas collecting pipeline; the data acquisition control unit (2) is simultaneously connected with an alcohol injection pipeline and a gas collecting pipeline at one end of the natural gas well (6) and is used for acquiring a pipeline pressure value of the alcohol injection pipeline, a gas flow value of the gas collecting pipeline and an environment temperature value of the gas collecting pipeline, analyzing and judging the gas flow value, the environment temperature value and the pipeline pressure value, and then operating an intelligent control algorithm to automatically regulate and control the electric regulating valve (3) to control the alcohol injection quantity of the corresponding natural gas well (6).
2. The intelligent alcohol injection system for a natural gas well according to claim 1, wherein: the solar energy power supply system (1) is used for supplying power to the data acquisition control unit (2) and the electric regulating valve (3).
3. An intelligent alcohol injection system for a natural gas well according to claim 1 or 2, wherein: the gas collecting pipeline is connected with a gas flowmeter (5) for monitoring the ambient temperature value and the natural gas flow value; the data acquisition control unit (2) is electrically connected with the pressure gauge (4) and the gas flowmeter (5).
4. An intelligent alcohol injection method for a natural gas well, which is applied to an intelligent alcohol injection system for the natural gas well as claimed in any one of claims 1 to 3, and is characterized in that: an intelligent control algorithm is operated on the data acquisition control unit (2) to automatically regulate and control the valve opening of the electric regulating valve (3) to control the alcohol injection quantity; the intelligent control algorithm comprises a safety threshold method, a pressure control method, a gas flow control method and a temperature control method, wherein the safety threshold method is used for controlling the valve opening of the electric regulating valve (3) according to whether the pipeline pressure value exceeds a safety threshold or not by the data acquisition control unit (2), and when the pipeline pressure value exceeds the safety threshold, the valve opening of the electric regulating valve (3) is maximum, and when the pipeline pressure value is below the safety threshold, the data acquisition control unit (2) operates the pressure control method, the gas flow control method or the temperature control method;
the pressure control method is that a data acquisition control unit (2) controls the valve opening of an electric control valve (3) according to the change trend of the pipeline pressure value, when the pipeline pressure value is increased, the valve opening of the electric control valve (3) is increased, and when the pipeline pressure value is decreased, the valve opening of the electric control valve (3) is decreased;
the gas flow control method is characterized in that a data acquisition control unit (2) controls the valve opening of an electric control valve (3) according to the change trend of a gas flow value, when the gas flow value is increased, the valve opening of the electric control valve (3) is reduced, and when the gas flow value is reduced, the valve opening of the electric control valve (3) is increased;
the temperature control method is that a data acquisition control unit (2) controls the valve opening of an electric regulating valve (3) according to the change trend of an environmental temperature value; when the ambient temperature value rises, the valve opening of the electric control valve (3) is reduced, and when the ambient temperature value falls, the valve opening of the electric control valve (3) is increased.
5. The intelligent alcohol injection method for the natural gas well, which is disclosed in claim 4, is characterized in that: the safety threshold method specifically comprises the following steps:
the upper limit of the pipeline pressure value is a safety threshold value of the data acquisition control unit (2); when the pipeline pressure value exceeds the safety threshold value, the data acquisition control unit (2) controls the valve opening of the electric regulating valve (3) to be regulated and controlled to be maximum;
and when the pipeline pressure value is below a safety threshold value, the data acquisition control unit (2) operates a pressure control method, a gas flow control method or a temperature control method to control the valve opening of the electric regulating valve (3).
6. The intelligent alcohol injection method for the natural gas well, which is disclosed in claim 4, is characterized in that: the pressure control method specifically comprises the following steps:
when the pressure value of the pipeline gradually rises, the data acquisition control unit (2) controls the valve opening of the electric regulating valve (3) to increase by a stepping value;
when the pressure value of the pipeline is stable and unchanged, the data acquisition control unit (2) controls the valve opening of the electric regulating valve (3) to be unchanged;
when the pressure value of the pipeline gradually decreases, the data acquisition control unit (2) controls the valve opening of the electric regulating valve (3) to decrease by a stepping value.
7. The intelligent alcohol injection method for the natural gas well, which is disclosed in claim 4, is characterized in that: the gas flow control method specifically comprises the following steps:
when the gas flow value is increased and the pipeline pressure value is gradually reduced, the data acquisition control unit (2) step-by-step controls the valve opening of the electric regulating valve (3) to be reduced;
when the gas flow value is reduced and the pipeline pressure value is gradually increased, the data acquisition control unit (2) step-by-step controls the valve opening of the electric regulating valve (3) to be increased;
when the gas flow value is stable and the pipeline pressure value is stable at the same time, the data acquisition control unit (2) controls the valve opening of the electric regulating valve (3) to be unchanged.
8. The intelligent alcohol injection method for the natural gas well, which is disclosed in claim 4, is characterized in that: the temperature control method specifically comprises the following steps:
when the environmental temperature value rises and the pipeline pressure value is kept stable, the data acquisition control unit (2) step-by-step controls the valve opening of the electric regulating valve (3) to be reduced;
when the environmental temperature value is reduced and the pipeline pressure value is increased, the data acquisition control unit (2) step-by-step controls the valve opening of the electric regulating valve (3) to be increased;
when the environmental temperature value is stable and the pipeline pressure value is stable at the same time, the data acquisition control unit (2) controls the valve opening of the electric regulating valve (3) to be unchanged.
9. The intelligent alcohol injection method for the natural gas well according to claim 7 or 8, wherein the method comprises the following steps of:
the step amount of the step is 10%.
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| CN202311510945.3A CN117231176B (en) | 2023-11-14 | 2023-11-14 | Intelligent alcohol injection system and method for natural gas well |
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| CN202311510945.3A CN117231176B (en) | 2023-11-14 | 2023-11-14 | Intelligent alcohol injection system and method for natural gas well |
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| CN117231176B CN117231176B (en) | 2024-01-30 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106869902A (en) * | 2017-02-22 | 2017-06-20 | 中国石油大学(华东) | Desanding de-watering apparatus and method during exploitation of gas hydrates |
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| CN106917960A (en) * | 2017-03-09 | 2017-07-04 | 中国石油大学(华东) | The stifled prevention robot control system(RCS) of point defeated station pressure regulator valve ice |
| CN108894762A (en) * | 2018-08-30 | 2018-11-27 | 西安长庆科技工程有限责任公司 | A kind of gas well well site note alcohol device and its application method |
| RU2687519C1 (en) * | 2018-04-17 | 2019-05-15 | Общество с ограниченной ответственностью "Газпром добыча Ямбург" | Inhibitor supply automatic control method for the hydrates formation prevention in located in the far north regions integrated / preliminary gas preparation installations gathering systems |
| CN115685910A (en) * | 2022-10-17 | 2023-02-03 | 西安思坦仪器股份有限公司 | Intelligent production control device for natural gas well |
| WO2023024510A1 (en) * | 2021-08-23 | 2023-03-02 | 维谛技术有限公司 | Control method and apparatus for opening degree of valve, and non-volatile storage medium and processor |
| US20230235635A1 (en) * | 2022-01-25 | 2023-07-27 | Southwest Petroleum University | Remote intelligent active drilling pressure control system and method |
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2023
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| CN102174882A (en) * | 2011-03-08 | 2011-09-07 | 西安长庆科技工程有限责任公司 | Medium-pressure gas collection technique based on cluster well |
| CN103968252A (en) * | 2014-04-30 | 2014-08-06 | 陕西延长石油(集团)有限责任公司研究院 | Alcohol injection process method for medium and low pressure natural gas collection |
| CN106869902A (en) * | 2017-02-22 | 2017-06-20 | 中国石油大学(华东) | Desanding de-watering apparatus and method during exploitation of gas hydrates |
| CN106869871A (en) * | 2017-02-22 | 2017-06-20 | 中国石油大学(华东) | Using the device and method of water outlet of being shaked out in bottom aerogenesis removing hydrate well |
| CN106917960A (en) * | 2017-03-09 | 2017-07-04 | 中国石油大学(华东) | The stifled prevention robot control system(RCS) of point defeated station pressure regulator valve ice |
| RU2687519C1 (en) * | 2018-04-17 | 2019-05-15 | Общество с ограниченной ответственностью "Газпром добыча Ямбург" | Inhibitor supply automatic control method for the hydrates formation prevention in located in the far north regions integrated / preliminary gas preparation installations gathering systems |
| CN108894762A (en) * | 2018-08-30 | 2018-11-27 | 西安长庆科技工程有限责任公司 | A kind of gas well well site note alcohol device and its application method |
| WO2023024510A1 (en) * | 2021-08-23 | 2023-03-02 | 维谛技术有限公司 | Control method and apparatus for opening degree of valve, and non-volatile storage medium and processor |
| US20230235635A1 (en) * | 2022-01-25 | 2023-07-27 | Southwest Petroleum University | Remote intelligent active drilling pressure control system and method |
| CN115685910A (en) * | 2022-10-17 | 2023-02-03 | 西安思坦仪器股份有限公司 | Intelligent production control device for natural gas well |
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| CN117231176B (en) | 2024-01-30 |
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