CN105239967A - Automatic control method of plunger gas-lift liquid drainage production of oil-gas well - Google Patents
Automatic control method of plunger gas-lift liquid drainage production of oil-gas well Download PDFInfo
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- CN105239967A CN105239967A CN201510682884.8A CN201510682884A CN105239967A CN 105239967 A CN105239967 A CN 105239967A CN 201510682884 A CN201510682884 A CN 201510682884A CN 105239967 A CN105239967 A CN 105239967A
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Abstract
The invention discloses an automatic control method of plunger gas-lift liquid drainage production of an oil-gas well. The automatic control method includes that a buffering clamping and fixing device and a plunger are lowered into an oil pipe after drifting, a gas production tree of the oil-gas well is connected with a blowout preventing pipe, a pneumatic membrane valve is arranged between a ground pipeline and the blowout preventing pipe and electrically connected with a plunger controller, the plunger controller realizes opening and closing of the gas well by controlling opening and closing of the pneumatic membrane valve, and a pressure sensor is arranged in a wellhead gas production chamber and electrically connected with the plunger controller; a casing pressure value when the plunger controller controls the oil-gas well to be open is set, a casing pressure value when the plunger controller controls the oil-gas well to be closed is set, the plunger controller receives casing pressure value signals measured by the pressure sensor, and opening and closing of the oil-gas well are controlled according to set well opening and closing conditions of the oil-gas well. Well opening or well closing of the oil-gas well is controlled according to changing circumstance of wellhead casing pressure and oil pressure of the oil-gas well, the changing circumstance is closely combined with liquid accumulating circumstance of the oil-gas well, optimal liquid lift quantity is guaranteed, and automated control management of the process of plunger gas-lift liquid drainage gas production is realized.
Description
Technical field
The invention belongs to oil gas field oil recovery production gas technology field, be specifically related to the autocontrol method that a kind of Oil/gas Well plunger lift discharge opeing is produced.
Background technology
Plunger lift fluid-discharge technology is the technical method utilizing gas well self-energy liquid to be discharged pit shaft.Plunger as the mechanical interface between gas-liquid, is utilized the gas of gas well output by this technology, promotes plunger and periodically moves up and down in oil pipe, and then periodically the liquid of stratum output is lifted to ground, and extraction gas.As the plunger of gas-liquid interface, effectively can stop on gas and alter and liquid falling, reduce liquid moves to this process of well head " slippage " effect from shaft bottom, significantly improve the efficiency of gas lifting liquid.This technique is mainly applicable to the gas well having certain production capacity, water yield per day is less than 25m3.
This technology needs the control realizing running plunger, automatically sets the working system of Oil/gas Well, effectively could play the effect of liquid discharging gas producing according to Oil/gas Well production status.The running of plunger is with closing well---and driving a well is a cycle of operation, and during closing well, plunger is free-falling in oil pipe, also falls after rise on the plunger buffer spring being fixed on down-hole through fluid column; Shaft bottom hydrops drives a well after being increased to setting height, and gas push plunger and plunger upper part hydrops move upward, and after plunger arrives well head, top hydrops is all lifted to surface line, completes a discharge opeing cycle.
And traditional plunger lift run system mainly engineer utilize Oil/gas Well data to judge, artificially arrange the time cycle of switch well, time switch well, therefore need to pay close attention to the Oil/gas Well condition of production frequently, workload is larger.
At present, the time-optimized method formed can realize Oil/gas Well and automatically run, but method is single, and be combined not tight with the actual hydrops situation of Oil/gas Well, applicable surface is limited.
Summary of the invention
The object of the invention is to overcome existing plunger lift discharge opeing is combined not tight with the actual hydrops situation of Oil/gas Well, the problem that applicable surface is limited.
For this reason, the invention provides the autocontrol method that a kind of Oil/gas Well plunger lift discharge opeing is produced, comprise the steps:
1) drifting, then enters to cushion fastener and plunger down successively in Oil/gas Well oil pipe, connects lubricator at well head christmas tree or wellhead tree treetop portion, and plunger is movable between buffering fastener and lubricator; Between surface line and lubricator, arrange the Pneumatic diaphragm valve controlling Oil/gas Well switch, Pneumatic diaphragm valve is connected to plunger controller by electric wire simultaneously, and plunger controller realizes Oil/gas Well opening or closing operation by controlling air bladder threshold switch;
2) arrange oil, casing pressure sensor at well head, measure Oil/gas Well oil, cover overpressure by pressure sensor, pressure sensor is connected with the plunger controller electric wire controlling Oil/gas Well switch, and the oil of measurement, casing pressure are transferred to plunger controller;
3) the casing pressure value that plunger controller control Oil/gas Well drives a well is set;
4) set the casing pressure value that plunger controller controls Oil/gas Well closing well, this casing pressure value is that after Oil/gas Well drives a well, casing pressure turns the rise range value after rising by falling;
5) plunger controller receives the casing pressure value signal that pressure sensor is measured, and then driving a well according to the Oil/gas Well of setting controls the switch of Oil/gas Well with closing well condition.
Above-mentioned steps 3) in, if the first production cycle controlled to drive a well, described casing pressure value is any setting value, if other production cycles control to drive a well, described casing pressure value is 1.5 times of last production cycle well shut-in period surface line pressure.
Above-mentioned steps 4) in the rise range value P=ρ gh of casing pressure, wherein, ρ is the density of hydrops in pit shaft, and g is constant, and h is hydrops height in pit shaft.
Beneficial effect of the present invention: the autocontrol method that this Oil/gas Well plunger lift discharge opeing provided by the invention is produced controls driving a well or closing well of Oil/gas Well according to the situation of change of Oil/gas Well surface casing pressure and oil pressure, combine closely with the hydrops situation of Oil/gas Well, guarantee best act liquid measure, realize the control and management to the automation of plunger gas lift liquid drainage gas recovery.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is that in the autocontrol method of Oil/gas Well plunger lift discharge opeing of the present invention production, pressure optimizes microlitre schematic diagram.
Fig. 2 is pressure microlitre value curve map in the autocontrol method of Oil/gas Well plunger lift discharge opeing of the present invention production.
Detailed description of the invention
Embodiment 1:
Be combined not tight with the actual hydrops situation of Oil/gas Well in order to overcome existing plunger lift discharge opeing, the problem that applicable surface is limited, present embodiments provides the autocontrol method that a kind of Oil/gas Well plunger lift discharge opeing is produced, comprises the steps:
1) drifting, then enters to cushion fastener and plunger down successively in Oil/gas Well oil pipe, connects lubricator at well head christmas tree or wellhead tree treetop portion, and plunger is movable between buffering fastener and lubricator; Between surface line and lubricator, arrange the Pneumatic diaphragm valve controlling Oil/gas Well switch, Pneumatic diaphragm valve is connected to plunger controller by electric wire simultaneously, and plunger controller realizes Oil/gas Well opening or closing operation by controlling air bladder threshold switch;
2) arrange oil, casing pressure sensor at well head, measure Oil/gas Well oil, cover overpressure by pressure sensor, pressure sensor is connected with the plunger controller electric wire controlling Oil/gas Well switch, and the oil of measurement, casing pressure are transferred to plunger controller;
3) the casing pressure value that plunger controller control Oil/gas Well drives a well is set;
In this step, if the first production cycle controlled to drive a well, described casing pressure value is any setting value, if other production cycles control to drive a well, described casing pressure value is 1.5 times of last production cycle well shut-in period surface line pressure.
4) set the casing pressure value that plunger controller controls Oil/gas Well closing well, this casing pressure value is that after Oil/gas Well drives a well, casing pressure turns the rise range value after rising by falling;
The rise range value P=ρ gh of casing pressure in this step, wherein, ρ is the density of hydrops in pit shaft, and g is constant, and h is hydrops height in pit shaft.
5) plunger controller receives the casing pressure value signal that pressure sensor is measured, and then driving a well according to the Oil/gas Well of setting controls the switch of Oil/gas Well with closing well condition.
The present invention arranges open and close well condition according to the variation tendency of Oil/gas Well casing pressure; Meanwhile, well opening time, closed-in time are equally by the constraint of maximum open and close well time, minimum open and close well time.
As shown in Figure 1, when casing pressure go back up to drive a well pressure set points time, plunger controller automatically performs the operation that drives a well.After driving a well, plunger is with the oil pipe of upper part, connect with the gas well external transport pipeline of operating pressure lower than casing pressure, certain pressure reduction is defined in the top and the bottom of plunger, the liquid that this pressure reduction just promotes plunger and top thereof moves to well head, until liquid is given rise to ground and discharges pit shaft, meanwhile, the gas that in this cycle, down-hole is assembled also output in the lump, enters the external transport pipeline of gas well.
After driving a well, casing pressure will decline fast in advance, and the change of progressively trickle rise appears in the later stage, and concrete reason is continuing along with the process of driving a well, and will start the hydrops of a new round in oil pipe, and now casing pressure is by stoppings decline, and starts trickle rise.
As shown in Figure 2, according to the production operation situation of Oil/gas Well, to realize maximum gas production, the most effectively to lift premised on liquid measure, for the situation of the trickle rise of casing pressure, provide a pressure microlitre occurrence; General under the state of driving a well, need shut in build up pressure when about 10m hydrops appears in pit shaft, the rise range value P=ρ gh of casing pressure, wherein, ρ is the density of hydrops in pit shaft, and g is constant, and h is hydrops height in pit shaft, i.e. the closing well when pressure microlitre 0.1MPa.When the pressure microlitre value arranged under casing pressure rise amplitude exceedes this pattern, plunger controller cuts out gas well, until the next production cycle drives a well again.
Embodiment 2:
On the basis of embodiment 1, the present embodiment is by observing the pressure microlitre value in closing well moment, and when setting plunger controller is pressure microlitre Optimizing Mode, the pressure that drives a well is 2.4MPa, and microlitre pressure is set to 0.015MPa.
Namely bring into operation after being provided with, and after plunger lift control system runs 3 days, derive the production report data stored in plunger controller, as shown in table 1,
Table 1:
As can be seen from Table 1, the casing pressure in the moment that drives a well is 2.4MPa, meets and presets the condition that drives a well; Closing well moment casing pressure microlitre value is 0.015MPa, meets default closing well condition.In this mode, controller adjusts the open and close well time automatically according to the situation of change of casing pressure, and production system is in Automatic Optimal state.
In sum, the autocontrol method that this Oil/gas Well plunger lift discharge opeing provided by the invention is produced controls driving a well or closing well of Oil/gas Well according to the situation of change of Oil/gas Well surface casing pressure and oil pressure, combine closely with the hydrops situation of Oil/gas Well, guarantee best act liquid measure, realize the control and management to the automation of plunger gas lift liquid drainage gas recovery.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (3)
1. an autocontrol method for Oil/gas Well plunger lift discharge opeing production, is characterized in that: comprise the steps:
1) drifting, then enters to cushion fastener and plunger down successively in Oil/gas Well oil pipe, connects lubricator at well head christmas tree or wellhead tree treetop portion, and plunger is movable between buffering fastener and lubricator; Between surface line and lubricator, arrange the Pneumatic diaphragm valve controlling Oil/gas Well switch, Pneumatic diaphragm valve is connected to plunger controller by electric wire simultaneously, and plunger controller realizes Oil/gas Well opening or closing operation by controlling air bladder threshold switch;
2) arrange oil, casing pressure sensor at well head, measure Oil/gas Well oil, cover overpressure by pressure sensor, pressure sensor is connected with the plunger controller electric wire controlling Oil/gas Well switch, and the oil of measurement, casing pressure are transferred to plunger controller;
3) the casing pressure value that plunger controller control Oil/gas Well drives a well is set;
4) set the casing pressure value that plunger controller controls Oil/gas Well closing well, this casing pressure value is that after Oil/gas Well drives a well, casing pressure turns the rise range value after rising by falling;
5) plunger controller receives the casing pressure value signal that pressure sensor is measured, and then driving a well according to the Oil/gas Well of setting controls the switch of Oil/gas Well with closing well condition.
2. the autocontrol method of Oil/gas Well plunger lift discharge opeing production as claimed in claim 1, it is characterized in that: step 3) in, if the first production cycle controlled to drive a well, described casing pressure value is any setting value, if the control of other production cycles drives a well, described casing pressure value is 1.5 times of last production cycle well shut-in period surface line pressure.
3. the autocontrol method of Oil/gas Well plunger lift discharge opeing production as claimed in claim 1, it is characterized in that: described step 4) in the rise range value P=ρ gh of casing pressure, wherein, ρ is the density of hydrops in pit shaft, g is constant, and h is hydrops height in pit shaft.
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| CN201510682884.8A CN105239967A (en) | 2015-10-20 | 2015-10-20 | Automatic control method of plunger gas-lift liquid drainage production of oil-gas well |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804701A (en) * | 2016-03-18 | 2016-07-27 | 河南方舟新能源股份有限公司 | Automatic control method of intermittent production of coal-bed gas well |
| CN106703747A (en) * | 2016-12-12 | 2017-05-24 | 中国石油天然气股份有限公司 | Remote automatic control digital needle valve device and method and application thereof |
| CN107608246A (en) * | 2017-09-22 | 2018-01-19 | 中国石油集团西部钻探工程有限公司 | Automatically control gas well switch board and its autocontrol method |
| CN107780919A (en) * | 2017-09-22 | 2018-03-09 | 中国石油集团西部钻探工程有限公司 | Long-range gas well switch board and its long-range control method |
| CN109025901A (en) * | 2018-09-18 | 2018-12-18 | 中国石油集团西部钻探工程有限公司 | Wellhead assembly is opened between gas well automation |
| CN109209304A (en) * | 2018-11-02 | 2019-01-15 | 西安安森智能仪器股份有限公司 | A kind of well plunger control system |
| CN109209305A (en) * | 2018-11-13 | 2019-01-15 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of gas well Intelligent Plunger mining device and construction method |
| CN109343380A (en) * | 2018-08-29 | 2019-02-15 | 西安安森智能仪器股份有限公司 | A kind of electronic command control device |
| CN109469460A (en) * | 2018-05-14 | 2019-03-15 | 中国石油集团西部钻探工程有限公司 | Wellhead assembly is opened between gas well automation |
| CN111075400A (en) * | 2018-10-18 | 2020-04-28 | 中国石油化工股份有限公司 | Inter-well gas lift intelligent gas injection method and system |
| CN111075399A (en) * | 2018-10-18 | 2020-04-28 | 中国石油化工股份有限公司 | Oil and gas well plunger gas lift control method and system |
| CN111577245A (en) * | 2020-05-19 | 2020-08-25 | 成都佳广知科技有限公司 | Intelligent water lifting gas production system and method for natural gas well |
| CN112593901A (en) * | 2021-03-03 | 2021-04-02 | 西南石油大学 | Shale gas well full production cycle production system and drainage and extraction process intelligent optimization method |
| CN113027382A (en) * | 2020-08-18 | 2021-06-25 | 陕西中良智能科技有限公司 | Machine learning device, intermittent gas well switching intelligent control system and control method |
| CN114165220A (en) * | 2020-08-21 | 2022-03-11 | 中国石油天然气股份有限公司 | Method and device for controlling plunger lifting system to open and close well |
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| CN105804701A (en) * | 2016-03-18 | 2016-07-27 | 河南方舟新能源股份有限公司 | Automatic control method of intermittent production of coal-bed gas well |
| CN105804701B (en) * | 2016-03-18 | 2018-03-23 | 河南方舟新能源股份有限公司 | A kind of autocontrol method opened between coal bed gas well |
| CN106703747A (en) * | 2016-12-12 | 2017-05-24 | 中国石油天然气股份有限公司 | Remote automatic control digital needle valve device and method and application thereof |
| CN107608246A (en) * | 2017-09-22 | 2018-01-19 | 中国石油集团西部钻探工程有限公司 | Automatically control gas well switch board and its autocontrol method |
| CN107780919A (en) * | 2017-09-22 | 2018-03-09 | 中国石油集团西部钻探工程有限公司 | Long-range gas well switch board and its long-range control method |
| CN107608246B (en) * | 2017-09-22 | 2024-03-26 | 中国石油天然气集团有限公司 | Automatic control gas well control cabinet and automatic control method thereof |
| CN109469460A (en) * | 2018-05-14 | 2019-03-15 | 中国石油集团西部钻探工程有限公司 | Wellhead assembly is opened between gas well automation |
| CN109343380B (en) * | 2018-08-29 | 2024-01-26 | 西安安森智能仪器股份有限公司 | Electronic command control device |
| CN109343380A (en) * | 2018-08-29 | 2019-02-15 | 西安安森智能仪器股份有限公司 | A kind of electronic command control device |
| CN109025901A (en) * | 2018-09-18 | 2018-12-18 | 中国石油集团西部钻探工程有限公司 | Wellhead assembly is opened between gas well automation |
| CN111075400A (en) * | 2018-10-18 | 2020-04-28 | 中国石油化工股份有限公司 | Inter-well gas lift intelligent gas injection method and system |
| CN111075399A (en) * | 2018-10-18 | 2020-04-28 | 中国石油化工股份有限公司 | Oil and gas well plunger gas lift control method and system |
| CN109209304B (en) * | 2018-11-02 | 2024-01-16 | 西安安森智能仪器股份有限公司 | Control method of well plunger control system |
| CN109209304A (en) * | 2018-11-02 | 2019-01-15 | 西安安森智能仪器股份有限公司 | A kind of well plunger control system |
| CN109209305B (en) * | 2018-11-13 | 2023-10-13 | 中国石油化工股份有限公司 | Intelligent plunger drainage and production device for gas well and construction method |
| CN109209305A (en) * | 2018-11-13 | 2019-01-15 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of gas well Intelligent Plunger mining device and construction method |
| CN111577245A (en) * | 2020-05-19 | 2020-08-25 | 成都佳广知科技有限公司 | Intelligent water lifting gas production system and method for natural gas well |
| CN111577245B (en) * | 2020-05-19 | 2023-03-28 | 成都佳广知科技有限公司 | Intelligent water lifting gas production system and method for natural gas well |
| CN113027382A (en) * | 2020-08-18 | 2021-06-25 | 陕西中良智能科技有限公司 | Machine learning device, intermittent gas well switching intelligent control system and control method |
| CN113027382B (en) * | 2020-08-18 | 2023-02-10 | 陕西中良智能科技有限公司 | Machine learning device, intermittent gas well switching intelligent control system and control method |
| CN114165220A (en) * | 2020-08-21 | 2022-03-11 | 中国石油天然气股份有限公司 | Method and device for controlling plunger lifting system to open and close well |
| CN112593901A (en) * | 2021-03-03 | 2021-04-02 | 西南石油大学 | Shale gas well full production cycle production system and drainage and extraction process intelligent optimization method |
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