CN206377007U - A kind of oil well interval pumping control system - Google Patents
A kind of oil well interval pumping control system Download PDFInfo
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- CN206377007U CN206377007U CN201621448166.0U CN201621448166U CN206377007U CN 206377007 U CN206377007 U CN 206377007U CN 201621448166 U CN201621448166 U CN 201621448166U CN 206377007 U CN206377007 U CN 206377007U
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Abstract
The utility model discloses a kind of oil well interval pumping control system, including oil pumper and controller, the controller is connected by motor with the oil pumper, for driving the oil pumper, load transducer and displacement transducer are provided with the oil pumper, the load transducer and displacement transducer are connected with the controller respectively, for the load of the pumping rod of well pumping unit and displacement measurement information to be sent into the controller in real time, the controller is connected with converter plant, the converter plant is connected with the motor, start and stop for motor described in VFC, control is taken out between realization.The system according to stop finding time and the oil pumping time intermittent pumping system is carried out it is preferred, pass through simulation analysis, decline boundary with reference to given allowable production rate, it is assured that and most long stops the cycle of taking out and corresponding pumping cycle, the oil well liquid-supplying situation for judging to obtain according to indicator card, automatic study, the optimal interval time of Step wise approximation oil well.
Description
【Technical field】
The utility model belongs to computer collecting system digitizer field, and in particular to a kind of beam pumping unit intermittent pumping
Control system.
【Background technology】
For feed flow is not enough and low yield inefficient well, and the exploitation middle and later periods hyposmosis well, it is continuous with strata pressure
Reduction, the not enough phenomenon of well deliverability is very universal, and because supply and discharge is uneven, oil pumper is chronically at inefficient operation shape
State, energy dissipation is serious, the invalid abrasion aggravation of equipment, causes economic benefit very low, occurs in that many inefficiencies, even " negative
The mechanical oil well of benefit ", how to allow oil pumper efficiently, energy-conservation work, into urgent problem to be solved.
From the perspective of pump efficiency and energy-conservation is improved, intermittent pumping working method is a kind of extremely effective mode, is overcome
Feed flow deficiency can not meet the problem of pumping unit continuously works, so as to improve pump efficiency, but intermittent pumping is when needing one section
Between build-up of fluid, in the process wellbore pressure raise, the thing followed is pit shaft and the reduction of ground interlayer pressure difference and ground
The reduction of layer seepage discharge.Therefore, rod-pumped well how is made to be run under efficient state, while playing stratum as much as possible again
Potentiality.
Adjusted and joined by oil well, pump setting depth is such as increased, to provide larger producing pressure differential；Lengthened stroke, trickle charge number, small pump
Footpath, can improve the liquid-extracting amount of oil well, once but oil well occur adjusting ginseng difficult, that is, when adjusting ginseng leeway less big, take out for a long time
The negative effect that oil is brought will aggravate.
【Utility model content】
Technical problem to be solved in the utility model is that there is provided a kind of walking beam for above-mentioned deficiency of the prior art
Formula oil pumper intermittent pumping control system, most rational control method is provided according to liquid situation is actually gone out, and realizes that computer collecting system is imitated
The lifting of rate and the target of energy consumption reduction.
The utility model uses following technical scheme：
A kind of oil well interval pumping control system, including oil pumper and controller, the controller are taken out by motor with described
Oil machine is connected, and load transducer and displacement transducer, the load are provided with the oil pumper, the oil pumper for driving
Sensor and displacement transducer are connected with the controller respectively, for the load of the pumping rod of well pumping unit and displacement to be surveyed
Amount information is sent to the controller in real time, and the controller is connected with converter plant, the converter plant and the motor
Connection, for the start and stop of motor described in VFC, takes out control between realization.
Further, the controller include well head collector and RTU control units, the well head collector respectively with institute
Load transducer and displacement transducer connection are stated, it is described for the information of the load transducer and displacement transducer to be sent to
RTU control units, the RTU control units are connected with the converter plant, for by being taken out described in converter plant control
Oil machine works.
Further, be provided with the motor speed probe and electricity ginseng acquisition module, the speed probe and
Electricity ginseng acquisition module is connected with the controller respectively, for the output rotating speed of the motor and Current Voltage value to be sent out
Give the controller.
Further, the speed probe is arranged on the output shaft of the motor, with the RTU control units without
Line is connected, for the rotating speed of the motor to be sent into the RTU control units.
Further, the electricity ginseng acquisition module is arranged on the motor voltage end, connects with the RTU control units
Connect, for the Current Voltage value of the motor to be sent into the RTU control units.
Further, display unit and operating unit are additionally provided with the controller, the display unit and operation are single
Member is connected with the RTU control units respectively, for display and operational control.
Further, the load transducer is arranged on the well head polished rod eye of the oil pumper.
Further, institute's displacement sensors are arranged on below the walking beam of the oil pumper.
Compared with prior art, the utility model at least has the advantages that：
A kind of oil well interval pumping control system of the utility model, by the load transducer and displacement transducer on oil pumper,
The measured value of pumping rod of well pumping unit load and displacement is gathered respectively, and controller is filled according to all information collected by frequency conversion
The start and stop of control motor are put, by controller computing and optimal control policy are provided, then operational factor is sent to converter plant,
Motor is rationally controlled by converter plant according to liquid situation is actually gone out, oil pump energy-saving operation control is finally realized, it is full
Sufficient oil well is coordinated for production, using taking out control between jig frequency adjustment and Intelligent Dynamic, thus realize oil well it is energy-saving with
And the loss of operational outfit is reduced, servo antrol meets the Precise control of oil well in a stroke cycle, further improves
Well system operational efficiency, reduces energy consumption.
Further, controller obtains the job information of motor and oil pumper using RTU control units respectively, with logical
News distance is longer, can be used in the industry spot of various bad environments, and modular structureization design is easy to extension, using extensive
Feature.
Further, the output rotating speed and electricity of motor are gathered respectively by speed probe and electricity ginseng acquisition module
Magnitude of voltage is flowed, realizes and oil pumper automatic start-stop and brake is controlled.
Further, the display unit and operating unit set on controller is easy to regular job.
Further, it is right by the displacement transducer below the load transducer and walking beam on well head polished rod eye
Pumping rod of well pumping unit load and displacement are measured, and can gather load and time, displacement and time graph, are calculated and are obtained well
Mouth indicator card.
In summary, the system passes through emulation according to stopping finding time and the oil pumping time carries out intermittent pumping system preferred
Analysis, boundary is declined with reference to given allowable production rate, it is possible to it is determined that most long stop the cycle of taking out and corresponding pumping cycle, root
The oil well liquid-supplying situation for judging to obtain according to indicator card, automatic study, the optimal interval time of Step wise approximation oil well.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
【Brief description of the drawings】
Fig. 1 is the utility model control system schematic diagram；
Fig. 2 is that the utility model control system Liquid output is corresponding ETAD expected time of arrival and departure curve map of 1t/d oil wells；
Fig. 3 be the utility model between open control flow chart.
【Embodiment】
Various sensors, converter plant and control that beam pumping unit energy-saving control system is installed on beam pumping unit
Device composition processed.Speed probe and electricity ginseng acquisition module, installed load, displacement sensing on oil pumper are installed in motor position
Device, the data that various sensors are gathered are sent to controller, by controller computing and provide optimal control policy, then will operation
Parameter is sent to converter plant, and converter plant is controlled to motor, finally realizes oil pump energy-saving operation control.
Refer to shown in Fig. 1, the utility model discloses a kind of oil well interval pumping control system, including oil pumper and control
Device, the controller is connected by motor with the oil pumper, is provided with for driving on the oil pumper, the oil pumper
Load transducer and displacement transducer, the load transducer and displacement transducer are connected with the controller respectively, for inciting somebody to action
The load and displacement measurement information of the pumping rod of well pumping unit are sent to the controller in real time, and the controller is connected with change
Frequency device, the converter plant is connected with the motor, for the start and stop of motor described in VFC, and control is taken out between realization
System.
Wherein, the controller includes well head collector, RTU control units, display unit and operating unit, the well head
Collector is connected with the load transducer and displacement transducer respectively, for by the load transducer and displacement transducer
Information is sent to the RTU control units, and the RTU control units are connected with the converter plant, for passing through the frequency conversion
Device controls the oil pumper work.Speed probe and electricity ginseng acquisition module are provided with the motor, the rotating speed is passed
Sensor and electricity ginseng acquisition module are connected with the controller respectively, for the output rotating speed and electric current of the motor is electric
Pressure value is sent to the controller, and the display unit and operating unit are connected with the RTU control units respectively, for showing
And operational control.
The speed probe is arranged on the output shaft of the motor, with the RTU control units wireless connection, is used
In the rotating speed of the motor is sent into the RTU control units.The electricity ginseng acquisition module is arranged on the electronic electromechanics
Pressure side, is connected with the RTU control units, for the Current Voltage value of the motor to be sent into the RTU control units.
The system is coordinated shaft bottom supply and discharge using control oil pumper intermittent pumping, by interval pumping mode of operation and balanced, and moves
State takes out standard and downtime between choosing oil pumper, and with the method for contrast optimization, rationally control oil pumper start and stop play oil well
Maximum capacity, makes Dlagnosis of Sucker Rod Pumping Well realize the maximization of yield, the minimum of energy expenditure and pump detection period it is longest.
A kind of specific control method of oil well interval pumping control system of the utility model is as follows：
S1, the installed load sensor on well head polished rod eye, install displacement transducer below walking beam, gather rod-pumped well
Sucker rod load and displacement information；
By the displacement transducer below the load transducer and walking beam on well head polished rod eye, rod-pumped well is taken out
Beam hanger load and displacement are measured, collection load and time, displacement and time graph.Well head indicator card is obtained by calculating,
Frequency acquisition is according to field output and goes out liquid rule, determines that every mouth oil well patrols the frequency for surveying one group of indicator card data, to low yield
Well preferably uses the frequency of 10 minutes, and the Effective power figure number gathered for one day is no less than in 110, a stroke cycle between waiting the time
200 are no less than every measuring data group points.
S2, installation speed probe and electricity ginseng acquisition module on motor, the rotating speed of synchronous acquisition motor output shaft,
Motor three-phase current and information of voltage；
Electricity ginseng acquisition module is installed on motor, by voltage and current Acquisition Circuit to the three-phase current of motor,
Voltage synchronizes constant duration in collection, a stroke cycle and measures data group points no less than 200.Pass through three-phase electricity
Can quality analysis chip calculating power of motor.Speed probe, synchronous acquisition motor output shaft are installed in motor reel output end
Constant duration measures data group points and is no less than 200 in rotating speed, a stroke cycle.
S3, step S1 and the S2 information gathered is sent to controller, controller is sent out after calculating the parameter information of motor
Converter plant is given, oil well output computation model is set up, according to pumping and stopping determination intermittent pumping system of finding time, is filled by frequency conversion
Put by control electric current frequency and working time control motor running, carry out oil well interval pumping control.
Load and displacement electric signal reach well head collector by cable, are uploaded to the progress computing of RTU control units and ask
Work(diagram data is solved, the motor power (output) of calculating is uploaded to RTU control units by electricity ginseng acquisition module, and motor reel rotating speed passes through nothing
Line transport module sends data to RTU control units.RTU control units are by computing, when calculating motor running and stopping
Between, motor speed, rotational speed omega distribution and power frequency f distribution.And parameter is sent to converter plant, converter plant passes through control
The controlled motors such as power frequency processed, working time are run, and carry out oil well interval pumping control.
Oil well interval pumping control method is specific as follows：
Refer to shown in Fig. 3, using control technology is opened between power graph method, load, displacement data are measured in real time, if oil pumper
Shut down, determine that oil pumper currently shuts down duration, if current duration, which is more than, is shut down duration, start oil pumper, otherwise return to carrying
Lotus, displacement are surveyed；If oil pumper is not shut down, it is determined that the point of load of setting is not contained in work(figure and the state is held
Whether the continuous time is more than setting time, continues to survey load, displacement if it is not greater, returning, if it is greater, then really
The relation for the time and The shortest operation time run after oil pumper starts is determined, if run time is less than most short operation after starting
Between, return and continue to survey load, displacement, if run time is more than The shortest operation time after starting, determine oil pumper
The time run after startup and the relation that the time is set, if run time is more than the setting time after starting, it is determined that shutting down duration
Duration+step-length was shut down equal to last time, shutdown of pumping machine returns to measurement load, displacement data in real time, if run time after starting
Less than the time of setting, it is determined that shutting down duration is equal to last time shutdown duration-step-length, shutdown of pumping machine returns to measurement load, position in real time
Move data.
Set up oil well and flow into characteristic curve model
According to Darcy's law, flowed for planar radial, the oil well output computation model of single phase fluid flow is：
In formula：H --- Effective thickness of formation, m；re--- oil well fuel feeding edge radius, m；rw--- well radius, m；
K --- in-place permeability, μm2；H --- core intersection, m；pwf--- stream pressure, MPa；pr--- static reservoir pressure, MPa；P --- pressure
Power, MPa；Ko--- oil relative permeability；Bo--- oil volume factor, m3/m3；μo--- stratum oil viscosity, mPa.s.
pwf＞ pbSituation it is as follows：
When only existing single-phase flow in stratum, oil well output formula is
Qo=J (pr-pwf) (2)
In formula：Qo--- oil well output, m3/d；J --- productivity index, m3/(s·Pa)。
Pb ＞ pr ＞ pwf situation is as follows：
When saturation pressure is higher than static pressure, oil well output is
In formula：QmYield when for flowing pressure being zero, m3/d。
Pr ＞ pb ＞ pwf situation is as follows：
When saturation pressure is less than static pressure, oil well output is
In formula：Qb--- stream pressure is equal to yield during saturation pressure, m3/d；pb--- saturation pressure, Pa.
Characteristic curve is flowed into for the conventional oil well shown in formula (2)~(4), it is characterized in that oil well output is with stream pressure
Drop and increase；Reduced with the increase of stream pressure.Obviously, if oil well follows tradition and flows into characteristic curve, when the intermittent pumping system of use
When spending, because build-up of fluid can cause stream pressure increase, then intermittent pumping system can reduce oil well output.
Intermittent pumping system is preferably specific as follows：
Intermittent pumping system includes two parameters：One is to stop the T that finds timeS；Two be oil pumping time TP。
Stopping taking out cycle TSInterior, well head does not produce liquid.Because well fluid level is in recovery state, therefore stream pressure is constantly in
Increase state is simultaneously higher than the stream pressure continuously pumped, and causes the liquid measure that stratum flows into oil jacket annular space to decrease；In pumping cycle TP
Interior, fluid in oil jacket annular space is pumped into oil pipe and gives rise to ground by oil well pump, well head production liquid.Lifted in oil well pump pumping former
While oily, fluid is continuously flowed into oil jacket annular space in stratum.Although oil well pump pumping liquid causes liquid level gradually to reduce,
Because in oil pumping process, liquid level is still higher than the liquid level continuously pumped, i.e. stream pressure is being taken out higher than the stream pressure continuously pumped
During oil, the liquid measure that stratum flows into pit shaft has also been reduced.
The simulation model for stopping build-up of fluid height during taking out is specific as follows：
Stopping taking out cycle TSInterior, any time liquid level meets equation below：
In formula：Hd0Hydrodynamic face during-continuous oil pumping, m；Ac- oil jacket annular space area of passage, m2；T-calculating moment, d；
Hd- moment t hydrodynamic face, m；pwf- moment t stream pressure, Pa；Q(pwf)-moment t and stream pressure pwfCorresponding stratum access wall
The instantaneous delivery of cylinder, m3/d。
Oil well stream pressure not only with hydrodynamic face HdIt is relevant, and with oil deposit parameter, stratum flow into pit shaft instantaneous delivery, well bore
Structure is relevant.This project calculates stream pressure using multiphase flow model, and circular is shown in annex I.
Build-up of fluid height H can be calculated by above-mentioned modeld, stream pressure pwf, stratum flow into pit shaft instantaneous delivery Q at any time
Between t changing rule, and then following parameter can be calculated：
A) stop stratum in the cycle of taking out and flow into the liquid measure of pit shaft relative to the percentage that continuous oil pumping inflow liquid measure is declined；
B) stop to take out the height H after all end of term build-up of fluidsdmin。
The simulation model of pumping cycle and oil well output in pumping cycle is specific as follows：
In pumping cycle TPIt is interior, any time liquid level：
In formula：psThe pump intake pressure of-moment t oil well pump, Pa；HdminRise and take out instantaneous minimum fluid depth, m；Qp
(ps)-moment t and pump intake pressure psCorresponding oil pumping pumpage, i.e. oil well instant productivity, m3/d。
Instant productivity Qp(ps) calculated by following formula：
In formula：D-oil pump plunger piston diameter, m；S-suspension point length of stroke, m；N-jig frequency, min-1；α-oil pumping pumpage
Coefficient.
Oil well pump discharge coefficient is calculated by following formula：
α=αSαFαLαV (8)
In formula：αS- plunger effective stroke coefficient；αF- coefficient of fullness；αLThe leakage factor of-pump；αV- pump intake pressure bar
The volume factor of dissolved gas crude oil under part.
Wherein：
In formula：Spump- plunger stroke length, m；K-clearance factor, K=S0/S；S0- clearance length, m；R-pumping enters
Implication liquor ratio, m3/m3；ps- oil pumping Pump Suction Nozzle pump intake pressure, MPa；pd- oil pumping pump discharge discharge pressure, MPa；N-day
Right gas polytropic process index；nw- moisture content；AP- plunger cross-sectional area, m2；Δ Q-and in a stroke procedure of plunger, liquid
Body is through the gap leakage between plunger and pump barrel, m3；BopsUnder the conditions of-Pump Suction Nozzle, the volume factor of crude oil in pump barrel；
BwpsUnder the conditions of-Pump Suction Nozzle, the volume factor of water.
Gap leakage between plunger and pump barrel is calculated by following formula：
In formula：D --- diameter of plunger, m；Δ p --- pressure difference above and below upstroke plunger, Pa；δ --- between plunger and pump barrel
Mean radius inner width, m；LC--- plungers length, m；E --- plunger center line is relative to the eccentric throw of pump barrel center line, m；
ε --- relative eccentric ratio, ε=e/ δ；Tu--- the time corresponding to one upstroke of plunger, s；μ --- the power of oil well liquid
Viscosity, Pas.
According to above-mentioned model, it may be determined that following parameter：
A) pumping cycle TP：Liquid level is by HdminDrop to the time that continuous oil pumping liquid level is undergone；
B) oil well output：Pumping cycle T is calculated firstPInterior Liquid output, and according to stopping taking out cycle TSWith pumping cycle TP
Determine the average daily fluid production rate of oil well.
Embodiment
Refer to shown in Fig. 2, control simulation model taken out according to, the oil well that daily output liquid is Q=1t/d can be calculated, it is ensured that
When Liquid output loss late is less than 5%, see that stopping incoming fluid average discharge and its rate of descent in the cycle of taking out is less than 14 hours, normally
Pumping is more than 8 hours.
By simulation analysis, decline boundary with reference to given allowable production rate, it is possible to it is determined that most long stop the cycle of taking out and institute
Corresponding pumping cycle.
It is standard to be not more than 5% with yield rate of descent, is carried out preferably taking out system different Liquid output oil wells.Difference production
Measuring interval system is：
As oil well output≤1t/d, a length of 12 hours when adding up to stop taking out；
It is accumulative to stop taking out duration 8 hours as oil well output 1t/d~1.5t/d；
It is accumulative to stop taking out duration 6 hours as oil well output 1.5t/d~2t/d.
On the basis of the initial interval time of setting, the oil well liquid-supplying situation for judging to obtain according to indicator card is automatic to learn
Habit, the optimal interval time of Step wise approximation oil well.Well deliverability changes, system also by being taken out between timely automated adjustment when
Between.
Above content is only explanation technological thought of the present utility model, it is impossible to limit protection model of the present utility model with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical scheme each falls within this reality
Within protection domain with new claims.
Claims (8)
1. a kind of oil well interval pumping control system, it is characterised in that：Including oil pumper and controller, the controller passes through motor
It is connected with the oil pumper, load transducer and displacement transducer is provided with the oil pumper, the oil pumper for driving,
The load transducer and displacement transducer are connected with the controller respectively, for by the load of the pumping rod of well pumping unit
The controller is sent in real time with displacement measurement information, and the controller is connected with converter plant, the converter plant and institute
Motor connection is stated, for the start and stop of motor described in VFC, control is taken out between realization.
2. a kind of oil well interval pumping control system according to claim 1, it is characterised in that：The controller is adopted including well head
Storage and RTU control units, the well head collector are connected with the load transducer and displacement transducer respectively, for by institute
The information for stating load transducer and displacement transducer is sent to the RTU control units, the RTU control units and the frequency conversion
Device is connected, for controlling the oil pumper to work by the converter plant.
3. a kind of oil well interval pumping control system according to claim 2, it is characterised in that：It is provided with and turns on the motor
Fast sensor and electricity ginseng acquisition module, the speed probe and electricity ginseng acquisition module are connected with the controller respectively, are used for
The output rotating speed and Current Voltage value of the motor are sent to the controller.
4. a kind of oil well interval pumping control system according to claim 3, it is characterised in that：The speed probe is arranged on
On the output shaft of the motor, and the RTU control units wireless connection, for the rotating speed of the motor to be sent into institute
State RTU control units.
5. a kind of oil well interval pumping control system according to claim 3, it is characterised in that：The electricity ginseng acquisition module is set
At the motor voltage end, it is connected with the RTU control units, for the Current Voltage value of the motor to be sent into institute
State RTU control units.
6. a kind of oil well interval pumping control system according to claim 2, it is characterised in that be additionally provided with the controller
Display unit and operating unit, the display unit and operating unit are connected with the RTU control units respectively, for show and
Operational control.
7. a kind of oil well interval pumping control system according to claim 1, it is characterised in that：The load transducer is arranged on
On the well head polished rod eye of the oil pumper.
8. a kind of oil well interval pumping control system according to claim 1, it is characterised in that：Institute's displacement sensors are arranged on
Below the walking beam of the oil pumper.
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| CN201621448166.0U CN206377007U (en) | 2016-12-27 | 2016-12-27 | A kind of oil well interval pumping control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762584A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of oil well interval pumping control system and method |
| CN108979602A (en) * | 2018-08-14 | 2018-12-11 | 西安朗信电子技术有限公司 | A kind of oil production machine energy saver and well fluid level model estimation method |
| CN110617038A (en) * | 2019-09-20 | 2019-12-27 | 中国石油化工股份有限公司 | Oil pumping drive control and detection analysis device based on self-adaptive analysis |
| CN112112604A (en) * | 2019-06-19 | 2020-12-22 | 中国石油天然气股份有限公司 | Method and device for controlling pumping rows between low-permeability oil wells |
| CN115510370A (en) * | 2022-11-21 | 2022-12-23 | 山东胜利通海集团东营天蓝节能科技有限公司 | Method for calculating oil well liquid production capacity based on ground indicator diagram |
-
2016
- 2016-12-27 CN CN201621448166.0U patent/CN206377007U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762584A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of oil well interval pumping control system and method |
| CN108979602A (en) * | 2018-08-14 | 2018-12-11 | 西安朗信电子技术有限公司 | A kind of oil production machine energy saver and well fluid level model estimation method |
| CN112112604A (en) * | 2019-06-19 | 2020-12-22 | 中国石油天然气股份有限公司 | Method and device for controlling pumping rows between low-permeability oil wells |
| CN112112604B (en) * | 2019-06-19 | 2023-02-24 | 中国石油天然气股份有限公司 | Method and device for controlling pumping rows between low-permeability oil wells |
| CN110617038A (en) * | 2019-09-20 | 2019-12-27 | 中国石油化工股份有限公司 | Oil pumping drive control and detection analysis device based on self-adaptive analysis |
| CN115510370A (en) * | 2022-11-21 | 2022-12-23 | 山东胜利通海集团东营天蓝节能科技有限公司 | Method for calculating oil well liquid production capacity based on ground indicator diagram |
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