CN108223343A - A kind of pumpingh well method for controlling frequency conversion based on Dynamic Control Chart and indicator card - Google Patents
A kind of pumpingh well method for controlling frequency conversion based on Dynamic Control Chart and indicator card Download PDFInfo
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- CN108223343A CN108223343A CN201611197291.3A CN201611197291A CN108223343A CN 108223343 A CN108223343 A CN 108223343A CN 201611197291 A CN201611197291 A CN 201611197291A CN 108223343 A CN108223343 A CN 108223343A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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Abstract
The present invention relates to a kind of pumpingh well method for controlling frequency conversion based on Dynamic Control Chart and indicator card, by analyzing oil well ground work(figure, with reference to oil field actual production data and static parameter, calculate the stroke ratio of stroke above and below oil well, and compared with data before, the variation tendency of oil well effective stroke is analyzed, intelligent frequency-conversion is carried out to oil well, it is modified in combination with Anomalous character control figure as a result, becoming yupin effect to oil well.The present invention is changed in the past under traditional mode, the raising of oil well pump efficiency can not achieve the limitation of Filled function dependent on means such as maintenance activity, well stimulation, tune ginseng optimizations, and frequency control excessively relies on artificial participation, it is impossible to realize real-time the shortcomings that adjusting to jig frequency.Realization frequency conversion optimizes on the basis of playing reservoir potentiality to greatest extent, reduces oil mining energy expenditure, improves system efficiency of pumping well, realizes oil well output and system effectiveness Continuous optimization.
Description
Technical field
The present invention relates to oil field pumping well frequency conversion control technique fields, specifically a kind of to be based on Dynamic Control Chart and show
The pumpingh well method for controlling frequency conversion of work(figure.
Background technology
Pumpingh well frequency conversion control technique basic principle is exactly that by motor power side AC power, (China leads to by frequency converter
It is often power frequency 50HZ) the adjustable three-phase alternating-current supply of frequency is transformed to, so as to change the speed regulating method of its synchronous rotational speed.It shows
It is exactly the frequency control for changing jig frequency on pumpingh well.The common oil production equipment in oil field is mainly pumping unit and electric pump, and different opens
Mode is adopted, there is different requirements to converter plant control mode.
Rod-pumped well occupies large percentage in China's oilfield exploitation, relative to international most advanced level, China's pumping unit fortune
Line efficiency is generally relatively low, causes a large amount of energy waste, increases enterprise's production cost.Improve system efficiency of pumping well,
It is the consistent pursuit of each elephant.Well system efficiency can be improved to a certain extent by improving oil well pump efficiency, reduced oil field and opened
The energy expenditure adopted.Under traditional mode, the raising of oil well pump efficiency is dependent on hands such as maintenance activity, well stimulation, tune ginseng optimizations
Section, it is impossible to realize Filled function, there is larger limitation.It is answered as variable-frequency control technique obtains part in oil mining
With realizing the judicial convenience of oilwell parameter adjusting to a certain extent, improve the system effectivenesies of some oil wells, but the tune of frequency
It is whole that dependence is still remained to artificial participation, the adaptability of oil well condition variation is need to be improved.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of pumpingh well frequency conversion control based on Dynamic Control Chart and indicator card
Method processed by analyzing oil well ground work(figure, with reference to oil field actual production data and static parameter, is calculated above and below oil well
The stroke ratio of stroke, and compared with data before, the variation tendency of oil well effective stroke is analyzed, intelligent change is carried out to oil well
Frequently, it is modified in combination with Anomalous character control figure as a result, becoming yupin effect to oil well, so as to improve pumping well system effect
Rate realizes oil well output and system effectiveness Continuous optimization.
Present invention technical solution used for the above purpose is：A kind of pumping based on Dynamic Control Chart and indicator card
Oil well method for controlling frequency conversion, includes the following steps：
Oil well submergence and pump efficiency data are obtained by indicator card data；
When judging that pumpingh well is located at parameter area bigger than normal according to Dynamic Control Chart, calculated up and down according to oil well indicator card data
Stroke ratio, and frequency control is carried out to oil well；
Then frequency conversion result is modified.
The calculating up-down stroke ratio：Sc=Syx/Sm
Wherein, SyxFor indicator card effective stroke；SmFor indicator card hair stroke.
It is described that oil well progress frequency control is included the following steps：
According to this indicator card stroke ratio and last time stroke than calculating indicator card stroke ratio K, K values are judged, are divided
For three kinds of situations：1-a≤K≤1+a, K≤1-a, K >=1+a；A is the maximum permissible value of each stroke ratio；
(1) if 1-a≤K≤1+a, then it is assumed that compared with the last time, stroke ratio does not change this work(figure, reads and becomes
The adjustment state value of frequency device；
If adjustment state value be 0, i.e., frequency reducing when, stroke ratio does not change, then it is assumed that this frequency reducing do not continue increase pump
Effect, pump efficiency have reached the maximum being worth, at this point, supply frequency is raised once, return to the state before this frequency conversion, while will adjust
Nodular state value puts 1, that is, keeps upper secondary frequencies production；
If adjustment state value is 1, that is, when maintaining frequency production, work(figure stroke does not change than, at this time without any frequency conversion
Processing, continues to frequency production, and adjustment state remains as 1；
If adjustment state value be 2, i.e., raising frequency when, work(figure stroke does not change than, thinks that raising frequency amplitude is not opened temporarily completely at this time
Hair oil layer fluid supply capacity, work(figure do not occur the insufficient situation of feed flow also, need to continue raising frequency, i.e., supply frequency are turned up once, together
When adjustment state put 2；
(2) if K≤1-a, then it is assumed that compared with the last time, work(figure stroke ratio becomes smaller this work(figure, reads adjustment state value；
If adjustment state value be 0, i.e., frequency reducing when, work(figure stroke ratio becomes smaller, and thinks not meeting objective law at this time, needs to report
It is alert, while without frequency-conversion processing, adjustment state is put 1；
If adjustment state is 1, that is, when maintaining frequency production, work(figure stroke ratio becomes smaller, and means that oil reservoir feed flow declines at this time,
Frequency reducing is needed to produce, supply frequency is lowered once, while adjustment state is set to 0；
If adjustment state is 2, i.e., when supply frequency increases, work(figure stroke ratio becomes smaller, and stopping continues to improve supply frequency, and
Supply frequency is reduced to the frequency before once, returning to last adjustment, production is maintained, adjustment state is put 1；
(3) if K >=1+a, then it is assumed that compared with the last time, work(figure stroke ratio becomes larger this work(figure ratio, reads adjustment state
Value；
If adjustment state value is 0, i.e., when supply frequency reduces, work(figure stroke ratio becomes larger, then it is assumed that as oil well jig frequency drops
Low, oil well pump efficiency increases, and does not reach maximum pump efficiency at this time, need to continue frequency reducing, and supply frequency is reduced once, meanwhile, adjust shape
State is set to 0；
If adjustment state value is 1, that is, when maintaining frequency production, work(figure stroke ratio becomes larger, then it is assumed that oil reservoir feed flow increases, and needs
Frequency is turned up, supply frequency is increased once, meanwhile, adjustment state puts 2；
If adjustment state value is 2, i.e., when supply frequency rises, work(figure stroke ratio becomes larger, and thinks not meeting objective rule at this time
Rule, needs to alarm, while without frequency-conversion processing, adjustment state is put 1.
Before the calculating up-down stroke ratio according to oil well indicator card data, whether interpretation work(figure is wrong, including following step
Suddenly：
It reads oil well indicator card and calculates up-down stroke ratio, judge stroke than whether being more than 0；If no more than 0, then it represents that should
Work(diagram data mistake simultaneously terminates；Otherwise continue to judge last time work(figure stroke than whether being more than 0；If last time stroke ratio is not more than 0,
Last time indicator card stroke ratio is rewritten as this indicator card stroke ratio, terminates this flow；If last time stroke ratio is more than 0, after
Afterflow journey.
It is described that frequency conversion result is modified specially：Using Dynamic Control Chart and the running frequency of reading at this time, to becoming
Frequency result is modified：
F represents current frequency converter frequency, fminRepresent that oil pumping hole motor allows minimum frequency, fmaxRepresent that oil pumping hole motor is permitted
Perhaps maximum frequency.
After the progress frequency control to oil well, adjustment state is judged, whether judgement adjustment state is 1, i.e.,
It keeps；
If it is not, balance judgement index N is then returned 0；If so, balance judgement index N values are added 1；
Judge whether balance judgement index N reaches balance decision threshold H again；
If it is not, terminate this flow；If so, thinking that frequency conversion has reached equilibrium state, frequency reducing is primary at this time, flat to break
Weighing apparatus, while balance judgement index N is returned 0, adjustment state is set to 0, this flow terminates；Wait for subsequent cycle.
The invention has the advantages that and advantage：
1st, under current technical status, the acquisition of oil well ground work(figure has been carried out real time implementation, therefore based on Dynamic Control Chart
It can realize that oil well Real-time frequency conversion optimizes with the intelligent frequency-conversion scheme of indicator card, adapt to the change of oil well condition to greatest extent；
2nd, frequency control realizes oil well output and system effectiveness optimizes；
3rd, frequency conversion optimization is modified by Dynamic Control Chart, the falseness occurred once in a while during converting operation can be eliminated
The influence of balance and failure work(figure；
4th, judged by balancing, to reaching equilibrium state, unadjusted oil well carries out active adjusting for a long time, breaks equilibrium-like
The phenomenon that state is prevented into after equilibrium state, and the change of well deliverability can not excite intelligent frequency-conversion flow；
Description of the drawings
Fig. 1 is the frequency control strategic process figure of the present invention；
Fig. 2 is the overview flow chart of the present invention；
Fig. 3 is the method flow diagram one of Dynamic Control Chart；
Fig. 4 is the method flow diagram two of Dynamic Control Chart；
Fig. 5 is the schematic diagram of Dynamic Control Chart.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
The present invention is directed to the technical need of rod-pumped well intelligent frequency-conversion, devises a kind of new rod-pumped well intelligent frequency-conversion control
Method processed.The present invention, with reference to oil field actual production data and static parameter, calculates oil by analyzing oil well ground work(figure
The stroke ratio of stroke above and below well, and compared with data before, the variation tendency of oil well effective stroke is analyzed, oil well is carried out
Intelligent frequency-conversion, in combination with Anomalous character control figure as a result, to oil well become yupin effect be modified, the present invention by using based on
The pumpingh well method for controlling frequency conversion that Dynamic Control Chart and indicator card are combined is changed in the past under traditional mode, oil well pump efficiency
Raising dependent on maintenance activity, well stimulation, adjust ginseng optimization etc. means can not achieve the limitation of Filled function and frequency conversion control
System excessively relies on artificial participation, it is impossible to realize real-time the shortcomings that adjusting to jig frequency.The present invention to play oil reservoir to greatest extent
Frequency conversion optimization is realized on the basis of potentiality, reduces oil mining energy expenditure, improves system efficiency of pumping well, realizes oil well production
Amount and system effectiveness Continuous optimization.
As shown in Figure 1 and Figure 2, a kind of pumpingh well method for controlling frequency conversion based on Dynamic Control Chart and indicator card, by showing work(
Oil well submergence and pump efficiency data is calculated in diagram data analysis, is then based on Dynamic Control Chart and judges oil well working region, really
It is fixed whether to carry out frequency control, and frequency conversion result is modified.By to oil well indicator card Data Analysis Services, calculating up and down
Stroke ratio carries out frequency control using corresponding control strategy to oil well.
Oil well condition is judged by way of based on Dynamic Control Chart, with reference to indicator card data, determines working region, is judged
Whether frequency control is carried out.
When converter unit powers on, startup detection is first carried out, is then initialized, by last time indicator card up-down stroke ratio, originally
Secondary stroke ratio is assigned a value of 0, and balance judgement index N is assigned a value of 0, adjustment state is put 2, i.e. raising frequency state, records current electricity
Source frequency.
As soon as the unit sets a timer or clock, through detecting once whether have new work(diagram data after a period of time, such as
Fruit does not have, then waits for and detecting next time, if so, into follow-up process.
After new work(figure has been detected, the work(figure is read, calculates stroke ratio, judges to calculate stroke than whether being more than 0, if
No more than 0, then it represents that the work(diagram data mistake terminates this flow, if more than 0, then continues to judge the last time work(figure punching of record
Whether journey is than being more than 0, if last time stroke ratio is not more than 0, last time work(figure stroke is rewritten as this than record and calculates data, knot
Shu Benci flows if last time stroke ratio is more than 0, continue flow.
Calculate work(figure stroke ratio K=Sc/Sc', K values are judged, are divided into three kinds of situations：1-a≤K≤1+a, K≤1-
A, K >=1+a.
(1) during 1-a≤K≤1+a
If 1-a≤K≤1+a, then it is assumed that, this work(figure ScWith last work(figure Sc' compare, stroke ratio does not change,
It needs to read adjustment state value at this time.
If adjustment state be 0, i.e., frequency reducing when, stroke ratio does not change, then it is assumed that this frequency reducing do not continue increase pump efficiency,
Pump efficiency has reached the maximum being worth, at this point, supply frequency is raised once, returns to the state before this frequency conversion so that oil well exists
Higher jig frequency is maintained to produce under identical pump efficiency, while adjustment state value is put 1, that is, keeps upper secondary frequencies production；
If adjustment state is 1, i.e., when maintaining frequency production, work(figure stroke does not change than, at this time without any frequency conversion
Processing, continues to frequency production, and adjustment state remains as 1；
If adjustment state is 2, i.e., in raising frequency, work(figure stroke does not change than, thinks that raising frequency amplitude is not opened temporarily completely at this time
Hair oil layer fluid supply capacity, work(figure do not occur the insufficient situation of feed flow also, need to continue raising frequency, i.e., supply frequency are turned up once, together
When adjustment state put 2.
(2) during K≤1-a
If K≤1-a, then it is assumed that, compared with the last time, work(figure stroke ratio becomes smaller this work(figure, reads adjustment state at this time
Value.
If adjustment state be 0, i.e., frequency reducing when work(figure stroke ratio become smaller, think not meeting objective law at this time, need to alarm, together
When without frequency-conversion processing, adjustment state is put 1；
If adjustment state is 1, that is, when maintaining frequency production, work(figure stroke ratio becomes smaller, and means that oil reservoir feed flow declines at this time,
Frequency reducing is needed to produce, at this point, supply frequency is lowered once, while adjustment state is set to 0；
If adjustment state is 2, i.e., when supply frequency increases, work(figure stroke ratio becomes smaller, and is thought at this time with oil well jig frequency
It is turned up, Oilwell swabbing ability has been above oil reservoir fluid supply capacity, at this point, should stop continuing improving supply frequency, and by power supply
Frequency reduces the frequency before once, returning to last adjustment, maintains production, adjustment state is put 1.
(3) during K >=1+a
If K >=1+a, then it is assumed that, compared with the last time, work(figure stroke ratio becomes larger this work(figure ratio, reads adjust shape at this time
State value.If adjustment state is 0, i.e., when supply frequency reduces, work(figure stroke ratio becomes larger, then it is assumed that as oil well jig frequency reduces, oil
Well pump effect increases, and does not temporarily reach maximum pump efficiency at this time, need to continue frequency reducing, at this point, supply frequency is reduced once, meanwhile, it adjusts
State is set to 0；
If adjustment state is 1, i.e., when maintaining frequency production, work(figure stroke ratio becomes larger, then it is assumed that oil reservoir feed flow increases, and needs
Frequency is turned up, strengthens exploitation, at this point, supply frequency is increased once, meanwhile, adjustment state puts 2；
If adjustment state is 2, i.e., when supply frequency rises, work(figure stroke ratio becomes larger, and thinks not meeting objective law at this time,
It needs to alarm, while without frequency-conversion processing, adjustment state is put 1.
Wherein, K be work(figure stroke ratio, i.e., this work(figure stroke than with last time stroke than ratio；A transfinites for stroke ratio
Susceptibility, i.e., the maximum permissible value of each stroke ratio beyond thinking that stroke ratio changes, do not exceed and think stroke ratio
Constant, this numerical value can be set；N is balance judgement index, for judging whether conversion process reaches balance；H is balance decision threshold
Value, the critical value that judgement frequency conversion reaches；Adjustment state is：0- frequency reducings, 1- are constant, 2- raising frequencies.
According to indicator card calculate indicator card up-down stroke ratio be：
Sc=Syx/Sm
Wherein, SyxFor indicator card effective stroke；SmFor indicator card hair stroke.
After more than each section flow is finished, adjustment state is judged, whether judgement adjustment state is 1, that is, is protected
It holds, if it is not, balance judgement index N then is returned 0, if so, balance judgement index N values are added 1；Balance judgement index N is judged again
Whether reach balance decision threshold H, if it is not, terminating this flow, if so, thinking that frequency conversion has reached equilibrium state, drop at this time
Frequency is primary, to break balance, while balance judgement index N is returned 0, adjustment state is set to 0, this flow terminates, and waits timers
Or after clock time has arrived, downstream cycle is carried out.
Oil well condition is judged by way of based on Dynamic Control Chart, with reference to indicator card and oilfield production data, is calculated
The submergence and pump efficiency of pumpingh well, determine working region, judge whether to frequency control.
When judging that pumpingh well is located at parameter area bigger than normal with reference to Dynamic Control Chart, frequency control is taken.
When converter unit powers on, startup detection is first carried out, is then initialized, by last time indicator card up-down stroke ratio, originally
Secondary stroke ratio is assigned a value of 0, and balance judgement index N is assigned a value of 0, adjustment state is put 2, i.e. raising frequency state, records current electricity
Source frequency.
As soon as the unit sets a timer or clock, through detecting once whether have new work(diagram data after a period of time, such as
Fruit does not have, then waits for and detecting next time, if so, into follow-up process.
After new work(figure has been detected, the work(figure is read, calculates stroke ratio, judges to calculate stroke than whether being more than 0, if
No more than 0, then it represents that the work(diagram data mistake terminates this flow, if more than 0, then continues to judge the last time work(figure punching of record
Whether journey is than being more than 0, if last time stroke ratio is not more than 0, last time work(figure stroke is rewritten as this than record and calculates data, knot
Shu Benci flows if last time stroke ratio is more than 0, continue flow.
Work(figure stroke ratio K is calculated, K values are judged, are divided into three kinds of situations：1-a≤K≤1+a, K≤1-a, K >=1+
a。
(1) during 1-a≤K≤1+a
If 1-a≤K≤1+a, then it is assumed that, compared with the last time, stroke ratio does not change this work(figure, needs at this time
Read adjustment state value.
If adjustment state be 0, i.e., frequency reducing when, stroke ratio does not change, then it is assumed that this frequency reducing do not continue increase pump efficiency,
Pump efficiency has reached the maximum being worth, at this point, supply frequency is raised once, returns to the state before this frequency conversion so that oil well exists
Higher jig frequency is maintained to produce under identical pump efficiency, while adjustment state value is put 1, that is, keeps upper secondary frequencies production；
If adjustment state is 1, i.e., when maintaining frequency production, work(figure stroke does not change than, at this time without any frequency conversion
Processing, continues to frequency production, and adjustment state remains as 1；
If adjustment state is 2, i.e., in raising frequency, work(figure stroke does not change than, thinks that raising frequency amplitude is not opened temporarily completely at this time
Hair oil layer fluid supply capacity, work(figure do not occur the insufficient situation of feed flow also, need to continue raising frequency, i.e., supply frequency are turned up once, together
When adjustment state put 2.
(2) during K≤1-a
If K≤1-a, then it is assumed that, compared with the last time, work(figure stroke ratio becomes smaller this work(figure, reads adjustment state at this time
Value.
If adjustment state be 0, i.e., frequency reducing when work(figure stroke ratio become smaller, think not meeting objective law at this time, need to alarm, together
When without frequency-conversion processing, adjustment state is put 1；
If adjustment state is 1, that is, when maintaining frequency production, work(figure stroke ratio becomes smaller, and means that oil reservoir feed flow declines at this time,
Frequency reducing is needed to produce, at this point, supply frequency is lowered once, while adjustment state is set to 0；
If adjustment state is 2, i.e., when supply frequency increases, work(figure stroke ratio becomes smaller, and is thought at this time with oil well jig frequency
It is turned up, Oilwell swabbing ability has been above oil reservoir fluid supply capacity, at this point, should stop continuing improving supply frequency, and by power supply
Frequency reduces the frequency before once, returning to last adjustment, maintains production, adjustment state is put 1.
(3) during K >=1+a
If K >=1+a, then it is assumed that, compared with the last time, work(figure stroke ratio becomes larger this work(figure ratio, reads adjust shape at this time
State value.If adjustment state is 0, i.e., when supply frequency reduces, work(figure stroke ratio becomes larger, then it is assumed that as oil well jig frequency reduces, oil
Well pump effect increases, and does not temporarily reach maximum pump efficiency at this time, need to continue frequency reducing, at this point, supply frequency is reduced once, meanwhile, it adjusts
State is set to 0；
If adjustment state is 1, i.e., when maintaining frequency production, work(figure stroke ratio becomes larger, then it is assumed that oil reservoir feed flow increases, and needs
Frequency is turned up, strengthens exploitation, at this point, supply frequency is increased once, meanwhile, adjustment state puts 2；
If adjustment state is 2, i.e., when supply frequency rises, work(figure stroke ratio becomes larger, and thinks not meeting objective law at this time,
It needs to alarm, while without frequency-conversion processing, adjustment state is put 1.
Wherein, K be work(figure stroke ratio, i.e., this work(figure stroke than with last time stroke than ratio；A transfinites for stroke ratio
Susceptibility, i.e., the maximum permissible value of each stroke ratio beyond thinking that stroke ratio changes, do not exceed and think stroke ratio
Constant, this numerical value can be set；N is balance judgement index, for judging whether conversion process reaches balance；H is balance decision threshold
Value, the critical value that judgement frequency conversion reaches；Adjustment state is：0- frequency reducings, 1- are constant, 2- raising frequencies.
After more than each section flow is finished, adjustment state is judged, whether judgement adjustment state is 1, that is, is protected
It holds, if it is not, balance judgement index N then is returned 0, if so, balance judgement index N values are added 1；Balance judgement index N is judged again
Whether reach balance decision threshold H, if it is not, terminating this flow, if so, thinking that frequency conversion has reached equilibrium state, drop at this time
Frequency is primary, to break balance, while balance judgement index N is returned 0, adjustment state is set to 0, this flow terminates, and waits timers
Or after clock time has arrived, downstream cycle is carried out.
Wherein, raising frequency, frequency reducing are controlled respectively according to F=F+ △ F, F=F- △ F；F is frequency, and △ F are the frequency of setting
Rate changing value.
When the pumpingh well frequency control based on indicator card, after oil well basically reaches stabilization, using Dynamic Control Chart to oil
Well operating mode carries out comprehensive diagnos, while reads running frequency at this time, carries out Comprehensive Evaluation to frequency conversion result, is shown in Table one.
One frequency correction chart of table
The Dynamic Control Chart that this implementation uses can obtain by the following method：
It is a kind of that the method for drawing Dynamic Control Chart is combined with calculating based on statistics, include the following steps：
Under theoretical pump efficiency line a, theoretical pump efficiency upper limit b, theoretical pump efficiency that Dynamic Control Chart is determined based on oilfield production data
Limit c and fluid supply capacity margin line d；
According to the pump intake pressure and pump efficiency of pumpingh well, it is fixed statistically bar and breaks to be left out and lose line g, reasonable pump efficiency boundary
Line e, minimum blowing limit of bottomhole flowing pressure line f；
Represent that the horizontal axis of pump efficiency, the longitudinal axis of expression pump intake pressure and above-mentioned each line form Dynamic Control Chart.
It is parameter area bigger than normal by the closed area that the horizontal stroke of e, f and Dynamic Control Chart, axis of ordinates are formed；By g, d and dynamic
The closed area that the frame of control figure is formed is parameter area less than normal；It is made of the axis of ordinates of g, c, f and Dynamic Control Chart, frame
Closed area take off lost circulation zone for section；The closed area being made of the horizontal stroke of b, d and Dynamic Control Chart, reference axis, frame is waits to fall
Real area；E, the closed area that b, d, c are formed is Reasonable area.
Determine that the theoretical pump efficiency line a, theoretical pump efficiency upper limit b, theory pump efficiency lower limit c of Dynamic Control Chart include the following steps：
According to the maximum value of parameters all kinds of in oilfield production data, pump intake pressure-pump efficiency is obtained using pump efficiency calculation formula
Theoretical pump efficiency upper limit b in curve, as Dynamic Control Chart；
According to the minimum value of parameters all kinds of in oilfield production data, pump intake pressure-pump efficiency is obtained using pump efficiency calculation formula
Theoretical pump efficiency lower limit c in curve, as Dynamic Control Chart；
According to the average value of parameters all kinds of in oilfield production data, pump intake pressure-pump efficiency is obtained using pump efficiency calculation formula
Theoretical pump efficiency line a in curve, as Dynamic Control Chart.
Pump efficiency calculation formula is as follows：
η=η1·η2·η3·η4·η5
Wherein, η is pump efficiency, η1Pump efficiency when being influenced for free gas；η2Piston effective travel is reduced for gas expansion in clearance
When pump efficiency；η3Pump efficiency during loss of plunger stroke is generated for oil pipe and sucker rod elastic telescopic；η4Pump efficiency when being influenced for solution gas；
η5For the pump efficiency influenced when pump barrel, valve leakage.
η1、η2、η3、η4、η5It is obtained by following formula：
η1=1/ [1+ (1-fW)(R-Rg)·Bg]
Bg=0.000386 (ZT/ph)
η2=[S-Sl(1-fW)(R-Rg)·Bg]/S
η3=(S- λ)/S
η4=fW+(1-fW)/B0
Wherein, R is production steam oil ratio (SOR)；RgFor dissolved gas oil ratio under suction pressure；fWFor moisture content；BgFor pump intake pressure
Lower gas volume factor；Z is gas compressibility factor；T is suction inlet temperature；phFor pump intake pressure；S is stroke of polished rod length；λ is
Loss of plunger stroke length；SlFor clearance length；L is lower-continuous mapping；ρ is fluid density；frIt is averagely cut for sucker rod roofbolt length weight
Area；I, j are the rod string series of layout successively from top to bottom；LiFor i-stage rod string length；friIt pumps for i-stage
Roofbolt sectional area；LjFor j-th stage rod string length；ftjFor j-th stage oil pipe sectional area；BoFor crude oil volume system under pump intake pressure
Number；D is diameter of plunger；Gaps of the δ between plunger and pump barrel；LsFor effective plungers length；γ is liquid motion viscosity；QlTo take out
The theoretical displacement of oil pump；hdFor well fluid level；fpFor plunger sectional area；Coefficients of the K for plunger degree of eccentricity influence in pump barrel, g
For acceleration of gravity, m is total series of sucker rod；ftFor tubing length weighted average sectional area.
Clock rate includes：R is production steam oil ratio (SOR)；RgFor dissolved gas oil ratio under suction pressure；fWFor moisture content；BgFor
Gas volume factor under pump intake pressure；Z is gas compressibility factor；T is suction inlet temperature；S is stroke of polished rod length；λ is stroke
Lost length；SlFor clearance length；L is lower-continuous mapping；ρ is fluid density；frFor sucker rod roofbolt length weight averga cross section
Product；LiFor i-stage rod string length；friFor i-stage rod string sectional area；LjFor j-th stage rod string length；ftjIt is
J grades of oil pipe sectional areas；BoFor oil volume factor under pump intake pressure；D is diameter of plunger；Gaps of the δ between plunger and pump barrel；Ls
For effective plungers length；γ is liquid motion viscosity；QlTheoretical displacement for oil well pump；hdFor well fluid level；fpIt is cut for plunger
Area；Coefficients of the K for plunger degree of eccentricity influence in pump barrel, ftFor tubing length weighted average sectional area.
Determine that fluid supply capacity margin line d includes the following steps：
It is worth to rod-pumped well according to being averaged for parameters all kinds of in oilfield production data and pump intake pressure and is averaged pump intake pressure
With minimum p is pressed from jet flowdRelation line, which is the fluid supply capacity margin line d in Dynamic Control Chart：
pd=(hz·ph)/hc+pt
Wherein, hzDynamic oil level is averagely converted for rod-pumped well；phIt is averaged pump intake pressure for rod-pumped well；hcFor oil pumping
Motor-pumped well is averaged reduced submergence；ptFor rod-pumped well average flow pressure.
The determining bar, which breaks to be left out, to be lost line g, reasonable pump efficiency margin line e, minimum blowing limit of bottomhole flowing pressure line f and includes following step
Suddenly：
(1) the pump intake pressure P of oil pipe side is calculatedh：
Wherein, FpuFor pump dynagraoph up stroke load；FpdFor pump dynagraoph down stroke load；fpFor plunger sectional area；F is pump barrel
Frictional resistance between plunger；
Plunger upper part pressurePcFor tubing pressure, Δ piIt is calculated by multiphase flow algorithm
Oil pipe lateral pressure gradient；N is oil pipe segments；
(2) oil well pump efficiency η：
η=Qs/Ql
Ql=1440nc·S·π·(D/2)2
Wherein, QsFor oil well actual production；QlFor oil well theoretical yield；ncFor oil well jig frequency, S is stroke of polished rod length, D
For diameter of plunger.
(3) by the pump intake pressure P of each oil welln, pump efficiency η and diagnostic message form oil well diagnostic data；According to diagnosis
Data determine that bar breaks to be left out and lose line g, reasonable pump efficiency margin line e, minimum blowing limit of bottomhole flowing pressure line f.
The Δ piIt is obtained by following formula：
Wherein：Δ p is the total pressure head of pipeline section, and Δ h is the potential pressure of pipeline section,As Δ pi；ρnFor gas in the pipeline section
The density of liquid mixture；G is acceleration of gravity；τfFriction pressure gradient for pipeline section；G is mixture quality flow；QgFor at this
The volume flow of gas phase under the average pressure and mean temperature of pipeline section；A is the basal area of pipe；pnAverage pressure for pipeline section；n
For oil pipe segments.
It is described to determine that bar breaks to be left out according to diagnostic data and lose line g, reasonable pump efficiency margin line e, minimum blowing limit of bottomhole flowing pressure line f
Include the following steps：
The oil well of normal work is counted according to oil well diagnostic data respectively and its pump intake pressure and pump efficiency, there is disconnected be left out and lose
Oil well and its pump intake pressure and pump efficiency；It chooses pump efficiency minimum value in the oil well of normal work and exists in the disconnected oil well for being left out and losing
The two average value is chosen corresponding points by pump efficiency maximum value in Dynamic Control Chart, and the straight line perpendicular to pump efficiency is done, and only through the point
In frame, the intersection point with theoretical pump efficiency lower limit c, which is that the bar in Dynamic Control Chart breaks to be left out and loses line g；
The oil well of non-normal working and its pump intake pressure and pump efficiency, normal work are counted according to oil well diagnostic data respectively
Oil well and its pump intake pressure and pump efficiency；Choose pump efficiency maximum value and pump efficiency in the oil well of normal work in the oil well of non-normal working
The two average value is chosen corresponding points by minimum value in Dynamic Control Chart, and the straight line perpendicular to pump efficiency is done, and terminate in horizontal stroke through the point
Axis, the intersection point with theoretical pump efficiency lower limit c, which is the reasonable pump efficiency margin line e in Dynamic Control Chart；
Oil well there are feed flow deficiency and gases affect and its pump intake pressure and pump are counted according to oil well diagnostic data respectively
It imitates, there is the disconnected oil well lost and its pump intake pressure and pump efficiency of being left out；Choose the pressure that sinks in the oil well of feed flow deficiency and gases affect
Power maximum value and there is pump intake pressure minimum value in the disconnected oil well for being left out and losing, the two average value is chosen in Dynamic Control Chart pair
Ying Dian does the straight line perpendicular to pump intake pressure through the point, and terminates in the longitudinal axis and theoretical pump efficiency lower limit c intersection points, which is dynamic
Minimum blowing limit of bottomhole flowing pressure line f in state control figure.
As shown in Figure 3, Figure 4, it is a kind of that the method for drawing Dynamic Control Chart is combined with statistics based on calculating, based on oil well
The specific creation data in the oil fields such as lower-continuous mapping, water content, the theoretical pump efficiency line for calculating Dynamic Control Chart, the theoretical pump efficiency upper limit, reason
By pump efficiency lower limit and fluid supply capacity margin line.Then statistically, determine that bar breaks respectively with pump efficiency by calculating submergence
It is left out and loses line, reasonable pump efficiency margin line, minimum blowing limit of bottomhole flowing pressure line.
Determine that Reasonable area pump efficiency lower limit e lines, fluid supply capacity limit f lines and disconnected be left out loses limit g lines by the method for statistics.
According to the collected data of oil field pumping well, oilfield production data and oil field static data, each mouth well is calculated
Pump intake pressure and pump efficiency, and the method marked by reference axis, statistically find out that there are feed flows in Dynamic Control Chart
The region of insufficient and serious gases affect determines a reasonable pump efficiency value.That is Reasonable area pump efficiency lower limit e lines；Similarly, with statistics
Mode finds out the region there are feed flow deficiency and disconnected mistake of being left out in Dynamic Control Chart, determines a rational pump intake pressure value,
That is fluid supply capacity boundary f lines；Similarly, statistically analysis is located at all pumpingh wells in the high pump intake pressure area of control figure,
So that it is determined that the pump efficiency boundary of normal well and abnormal well, i.e. disconnected be left out lose line g lines.
Theoretical pump efficiency line a lines, theory pump efficiency upper limit b lines, theoretical pump efficiency lower limit c lines and minimum are obtained by way of calculating
Blowing pump intake pressure boundary d lines.
Wherein, pump intake pressure reflection is for liquid status, pump efficiency reflection drain state.The principal element for influencing pump efficiency is free
Gas, solution gas, clearance loss, loss of plunger stroke, various leakages etc., these factors are all the function of pump intake pressure again, therefore can be with
The theoretical pump efficiency upper limit, theoretical pump efficiency lower limit and the theoretical pump efficiency line of Dynamic Control Chart is determined by calculation.
Theoretical pump efficiency a lines are determined (see Fig. 5)：Take the lower-continuous mapping in oil field, the average value of the parameters such as aqueous, using pump efficiency
It is the theoretical pump efficiency line in Dynamic Control Chart that calculation formula, which calculates pump intake pressure-pump efficiency curve,.
Theoretical pump efficiency upper limit b lines are determined (see Fig. 5)：The lower-continuous mapping in oil field, the maximum value of the parameters such as aqueous are taken, is used
It is the theoretical pump efficiency upper limit curve in Dynamic Control Chart that pump efficiency calculation formula, which calculates pump intake pressure-pump efficiency curve,.
Theoretical pump efficiency lower limit c lines are determined (see Fig. 5)：The lower-continuous mapping in oil field, the minimum value of the parameters such as aqueous are taken, is used
It is the theoretical pump efficiency lower limit curve in Dynamic Control Chart that pump efficiency calculation formula, which calculates pump intake pressure-pump efficiency curve,.
Minimum blowing pump intake pressure boundary d lines are determined (see Fig. 5)：Calculating can be simplified, only consider that gravity and oil pressure influence
：
pd=(hz·ph)/hc+pt
Wherein, pdFor the minimum from jet flow pressure, i.e. d lines of rod-pumped well；hzDynamic oil level is averagely converted for rod-pumped well；
phIt is averaged pump intake pressure for rod-pumped well；hcIt is averaged reduced submergence for rod-pumped well；ptFor rod-pumped well average flow pressure.
The pump efficiency calculating process is：
η=η1·η2·η3·η4·η5
Wherein, η1Pump efficiency when being influenced for free gas；η2Pump during piston effective travel is reduced for gas expansion in clearance
Effect；η3Pump efficiency during loss of plunger stroke is generated for oil pipe and sucker rod elastic telescopic；η4Pump efficiency when being influenced for solution gas；η5For pump
The pump efficiency influenced when cylinder, valve leakage.
Pump efficiency calculation formula is：
η1=1/ [1+ (1-fW)(R-Rg)·Bg]
Bg=0.000386 (ZT/ph)
η2=[S-S1(1-fW)(R-Rg)·Bg]/S
η3=(S- λ)/S
η4=fW+(1-fW)/B0
Wherein, R is production steam oil ratio (SOR)；RgFor dissolved gas oil ratio under suction pressure；fWFor moisture content；BgFor pump intake pressure
Lower gas volume factor；Z is gas compressibility factor；T is suction inlet temperature；phFor pump intake pressure；S is stroke of polished rod length；λ is
Loss of plunger stroke length；SlFor clearance length；L is lower-continuous mapping；ρ is fluid density；E is steel elasticity modulus；frFor sucker rod bar
Column length weighted average sectional area；I, j are the rod string series of layout successively from top to bottom；LiFor i-stage sucker rod column length
Degree；friFor i-stage rod string sectional area；LjFor j-th stage rod string length；ftjFor j-th stage rod string sectional area；BoFor
Oil volume factor under pump intake pressure；D is diameter of plunger；Gaps of the δ between plunger and pump barrel；LsFor effective plungers length；γ
For liquid motion viscosity；QlTheoretical displacement for oil well pump；hdFor well fluid level；fpFor plunger sectional area；ftFor tubing length
Weighted average sectional area.
The pump intake pressure and pump efficiency of pumpingh well are sought by collected data and oilfield production data, oil field static data.
(1) the pump intake pressure P for calculating oil pipe sidenInclude the following steps：
Force analysis is carried out to plunger, then is had：
Note pump load is F before upstroke fixes after valve is opened and arrives closingpu=Pp(fp-fr)-phfp+Wp+f
Note pump is carried as F to before closing after down stroke travelling valve openingpd=Pp(fp-fr)-phfp+Wp-f
Subtract each other：
Wherein, FpuFor pump dynagraoph up stroke load；FpdFor pump dynagraoph down stroke load；PpFor plunger upper part pressure；phFor
Pump intake pressure；fp,frRespectively plunger and oil pumping rod area；WpFor rod weight；Frictions of the f between pump barrel and plunger
Resistance；
The plunger upper part pressure PpFor：
Wherein, PcFor tubing pressure, Δ piFor the oil pipe lateral pressure gradient being calculated by multiphase flow algorithm.
(2) the calculating oil well pump efficiency includes the following steps：
η=Qs/Ql
Ql=1440nc·S·π·(D/2)2
Wherein, QsFor oil well actual production；QlFor oil well theoretical yield；ncFor oil well jig frequency.
The barometric gradient that multiphase flow algorithm is calculated is：
Orkiszewski multiphase stream calculations barometric gradient is distributed：
Wherein：Δ p is the total pressure head of pipeline section；Δ h is the potential pressure of pipeline section；As Δ pi；ρnFor gas in the pipeline section
The density of liquid mixture；G is acceleration of gravity；τfFriction pressure gradient for pipeline section；G is mixture quality flow；QgFor at this
The volume flow of gas phase under the average pressure and mean temperature of pipeline section；A is the basal area of pipe；pnAverage pressure for pipeline section.
Step 1：Determined by way of calculating theoretical pump efficiency line a lines in Dynamic Control Chart, theory pump efficiency upper limit b lines,
Theoretical pump efficiency lower limit c lines and minimum blowing pump intake pressure boundary d lines.
The pump efficiency calculating process is：η=η1·η2·η3·η4·η5
Wherein, η1Pump efficiency when being influenced for free gas；η2Pump during piston effective travel is reduced for gas expansion in clearance
Effect；η3Pump efficiency during loss of plunger stroke is generated for oil pipe and sucker rod elastic telescopic；η4Pump efficiency when being influenced for solution gas；η5For pump
The pump efficiency influenced when cylinder, valve leakage.
η1=1/ [1+ (1-fW)(R-Rg)·Bg]
Bg=0.000386 (ZT/ph)
η2=[S-S1(1-fW)(R-Rg)·Bg]/S
η3=(S- λ)/S
η4=fW+(1-fW)/B0
Wherein, R is production steam oil ratio (SOR)；RgFor dissolved gas oil ratio under suction pressure；fWFor moisture content；BgFor pump intake pressure
Lower gas volume factor；Z is gas compressibility factor；T is suction inlet temperature；phFor pump intake pressure；S is stroke of polished rod length；λ is
Loss of plunger stroke length；SlFor clearance length；L is lower-continuous mapping；ρ is fluid density；E is steel elasticity modulus；frFor sucker rod bar
Column length weighted average sectional area；I, j are the rod string series of layout successively from top to bottom；LiFor i-stage sucker rod column length
Degree；friFor i-stage rod string sectional area；LjFor j-th stage rod string length；ftjFor j-th stage rod string sectional area；BoFor
Oil volume factor under pump intake pressure；D is diameter of plunger；Gaps of the δ between plunger and pump barrel；LsFor effective plungers length；γ
For liquid motion viscosity；QlTheoretical displacement for oil well pump；hdFor well fluid level；fpFor plunger sectional area；
Wherein, pump intake pressure reflection is for liquid status, pump efficiency reflection drain state.The principal element for influencing pump efficiency is free
Gas, solution gas, clearance loss, loss of plunger stroke, various leakages etc., these factors are all the function of pump intake pressure again, therefore can be with
Theoretical pump efficiency line, the theoretical pump efficiency upper limit and the theoretical pump efficiency lower limit of Dynamic Control Chart is determined by calculation.
Theoretical pump efficiency a lines are determined (see Fig. 5)：Take the lower-continuous mapping in oil field, the average value (pump intake pressure of the parameters such as aqueous
Except), by each average value substitute into pump efficiency calculation formula, obtain the relationship between pump intake pressure and pump efficiency, calculate pump intake pressure-
Pump efficiency curve is the theoretical pump efficiency line in Dynamic Control Chart.
Theoretical pump efficiency upper limit b lines are determined (see Fig. 5)：The lower-continuous mapping in oil field, the maximum value of the parameters such as aqueous are taken, similarly
It is the theoretical pump efficiency upper limit curve in Dynamic Control Chart to calculate pump intake pressure-pump efficiency curve using pump efficiency calculation formula.
Theoretical pump efficiency lower limit c lines are determined (see Fig. 5)：The lower-continuous mapping in oil field, the minimum value of the parameters such as aqueous are taken, similarly
It is the theoretical pump efficiency lower limit curve in Dynamic Control Chart to calculate pump intake pressure-pump efficiency curve using pump efficiency calculation formula.
Minimum blowing pump intake pressure boundary d lines are determined (see Fig. 5)：Calculating can be simplified, only consider that gravity and oil pressure influence
：
pd=(hz·ph)/hc+pt
Wherein, pdFor the minimum from jet flow pressure, i.e. d lines of pumpingh well；hzDynamic oil level is averagely converted for pumpingh well；phFor
Pumpingh well is averaged pump intake pressure；hcIt is averaged reduced submergence for pumpingh well；ptFor pumpingh well average flow pressure.
Step 2：Determine that Reasonable area pump efficiency lower limit e lines, fluid supply capacity boundary f lines and disconnected be left out are lost by the method for statistics
Limit g lines.
The pump intake pressure and pump efficiency of pumpingh well are sought by collected data and oilfield production data, oil field static data.
(1) the pump intake pressure P for calculating oil pipe sidenInclude the following steps：
Force analysis is carried out to plunger, then is had：
Note pump load is F before upstroke fixes after valve is opened and arrives closingpu=Pp(fp-fr)-phfp+Wp+f
Note pump is carried as F to before closing after down stroke travelling valve openingpd=Pp(fp-fr)-phfp+Wp-f
Subtract each other：
Wherein, FpuFor pump dynagraoph up stroke load；FpdFor pump dynagraoph down stroke load；PpFor plunger upper part pressure；phFor
Pump intake pressure；fp,frRespectively plunger and oil pumping rod area；WpFor rod weight；Frictions of the f between pump barrel and plunger
Resistance；
The plunger upper part pressure PpFor：
Wherein, PcFor tubing pressure, Δ piFor the oil pipe lateral pressure gradient being calculated by multiphase flow algorithm.
(2) the calculating oil well pump efficiency includes the following steps：
η=Qs/Ql
Ql=1440nc·S·π·(D/2)2
Wherein, QsFor oil well actual production；QlFor oil well theoretical yield；ncFor oil well jig frequency.
The barometric gradient that multiphase flow algorithm is calculated is：
Orkiszewski multiphase stream calculations barometric gradient is distributed：
Wherein：Δ p is the total pressure head of pipeline section；Δ h is the potential pressure of pipeline section；ρnFor in the pipeline section gas-liquid mixture it is close
Degree；G is acceleration of gravity；τfFriction pressure gradient for pipeline section；G is mixture quality flow；QgFor the mean pressure in the pipeline section
The volume flow of gas phase under power and mean temperature；A is the basal area of pipe；pnAverage pressure for pipeline section.
According to the collected data of oil field pumping well, oilfield production data and oil field static data, each mouth well is calculated
Pump intake pressure and pump efficiency, and the method marked by reference axis, statistically find out that there are feed flows in Dynamic Control Chart
The region of insufficient and serious gases affect determines a reasonable pump efficiency value.That is Reasonable area pump efficiency lower limit e lines：
2 Reasonable area pump efficiency lower limit e lines of table determine
The sub-fraction data only taken from a large amount of statistical data shown in table 2, can be closed according to statistical result
Reason area's pump efficiency lower limit e lines value be：30%.
Similarly, the region there are feed flow deficiency and disconnected mistake of being left out statistically is found out in Dynamic Control Chart, is determined
One rational pump intake pressure value, i.e. fluid supply capacity boundary f lines：
3 fluid supply capacity boundary f lines of table determine
The sub-fraction data only taken from a large amount of statistical data shown in table 3, can be supplied according to statistical result
The value of liquid capacity limits f lines is：5Mpa.
Similarly, statistically analysis is located at all pumpingh wells in the high pump intake pressure area of control figure, so that it is determined that just
The pump efficiency boundary of the abnormal wells of Chang Jingyu, i.e. disconnected be left out lose line g lines：
Disconnected be left out of table 4 loses determining for line g lines
The sub-fraction data only taken from a large amount of statistical data shown in table 4, can be broken according to statistical result
Be left out lose line g lines value be：60%.
The Dynamic Control Chart drawn out is as shown in Figure 5.The feed flow of oil well and the state of drain can be showed according to the chart, adjusted
Whole and management oil well.
Claims (6)
1. a kind of pumpingh well method for controlling frequency conversion based on Dynamic Control Chart and indicator card, it is characterised in that include the following steps：
Oil well submergence and pump efficiency data are obtained by indicator card data；
When judging that pumpingh well is located at parameter area bigger than normal according to Dynamic Control Chart, up-down stroke is calculated according to oil well indicator card data
Than, and frequency control is carried out to oil well；
Then frequency conversion result is modified.
2. the pumpingh well method for controlling frequency conversion according to claim 1 based on Dynamic Control Chart and indicator card, feature exist
In the calculating up-down stroke ratio：
Sc=Syx/Sm
Wherein, SyxFor indicator card effective stroke；SmFor indicator card hair stroke.
3. the pumpingh well method for controlling frequency conversion according to claim 1 based on Dynamic Control Chart and indicator card, feature exist
Oil well progress frequency control is included the following steps in described：
According to this indicator card stroke ratio and last time stroke than calculating indicator card stroke ratio K, K values are judged, are divided into three
Kind situation：1-a≤K≤1+a, K≤1-a, K >=1+a；A is the maximum permissible value of each stroke ratio；
(1) if 1-a≤K≤1+a, then it is assumed that compared with the last time, stroke ratio does not change this work(figure, reads frequency converter
Adjustment state value；
If adjustment state value be 0, i.e., frequency reducing when, stroke ratio does not change, then it is assumed that this frequency reducing do not continue increase pump efficiency, pump
Effect has reached the maximum being worth, at this point, supply frequency is raised once, returns to the state before this frequency conversion, while will adjust shape
State value puts 1, that is, keeps upper secondary frequencies production；
If adjustment state value is 1, that is, when maintaining frequency production, work(figure stroke does not change than, at this time without any frequency-conversion processing,
Frequency production is continued to, adjustment state remains as 1；
If adjustment state value is 2, i.e., raising frequency when, work(figure stroke does not change than, and thinking raising frequency amplitude at this time, temporarily exploitation is oily completely
Layer fluid supply capacity, work(figure do not occur the insufficient situation of feed flow also, need to continue raising frequency, i.e., supply frequency are turned up once, simultaneously will
Adjustment state puts 2；
(2) if K≤1-a, then it is assumed that compared with the last time, work(figure stroke ratio becomes smaller this work(figure, reads adjustment state value；
If adjustment state value be 0, i.e., frequency reducing when, work(figure stroke ratio becomes smaller, and thinks not meeting objective law at this time, needs to alarm, together
When without frequency-conversion processing, adjustment state is put 1；
If adjustment state is 1, that is, when maintaining frequency production, work(figure stroke ratio becomes smaller, and means that oil reservoir feed flow declines at this time, needs to drop
Frequency produces, and supply frequency is lowered once, while adjustment state is set to 0；
If adjustment state is 2, i.e., when supply frequency increases, work(figure stroke ratio becomes smaller, and stopping continues to improve supply frequency, and will be electric
Source frequency reduces the frequency before once, returning to last adjustment, maintains production, adjustment state is put 1；
(3) if K >=1+a, then it is assumed that compared with the last time, work(figure stroke ratio becomes larger this work(figure ratio, reads adjustment state value；
If adjustment state value is 0, i.e., when supply frequency reduces, work(figure stroke ratio becomes larger, then it is assumed that as oil well jig frequency reduces, oil
Well pump effect increases, and does not reach maximum pump efficiency at this time, need to continue frequency reducing, and supply frequency is reduced once, meanwhile, adjustment state is set to 0；
If adjustment state value is 1, that is, when maintaining frequency production, work(figure stroke ratio becomes larger, then it is assumed that oil reservoir feed flow increases, and needs to be turned up
Frequency increases supply frequency once, meanwhile, adjustment state puts 2；
If adjustment state value is 2, i.e., when supply frequency rises, work(figure stroke ratio becomes larger, and thinks not meeting objective law at this time, needs
Alarm, while without frequency-conversion processing, adjustment state is put 1.
4. the pumpingh well method for controlling frequency conversion according to claim 1 based on Dynamic Control Chart and indicator card, feature exist
Before the calculating up-down stroke ratio according to oil well indicator card data, whether interpretation work(figure is wrong, includes the following steps：
It reads oil well indicator card and calculates up-down stroke ratio, judge stroke than whether being more than 0；If no more than 0, then it represents that the work(figure
Error in data simultaneously terminates；Otherwise continue to judge last time work(figure stroke than whether being more than 0；If last time stroke ratio is not more than 0, will be upper
Secondary indicator card stroke ratio is rewritten as this indicator card stroke ratio, terminates this flow；If last time stroke ratio is more than 0, after afterflow
Journey.
5. the pumpingh well method for controlling frequency conversion according to claim 1 based on Dynamic Control Chart and indicator card, feature exist
Frequency conversion result is modified specially in described：Using Dynamic Control Chart and the running frequency of reading at this time, to frequency conversion result
It is modified：
F represents current frequency converter frequency, fminRepresent that oil pumping hole motor allows minimum frequency, fmaxRepresent that oil pumping hole motor allows most
Big frequency.
6. the pumpingh well method for controlling frequency conversion according to claim 1 based on Dynamic Control Chart and indicator card, feature exist
After the progress frequency control to oil well, adjustment state is judged, whether judgement adjustment state is 1, that is, is kept；
If it is not, balance judgement index N is then returned 0；If so, balance judgement index N values are added 1；
Judge whether balance judgement index N reaches balance decision threshold H again；
If it is not, terminate this flow；If so, thinking that frequency conversion has reached equilibrium state, frequency reducing is primary at this time, to break balance,
Balance judgement index N is returned 0 simultaneously, adjustment state is set to 0, this flow terminates；Wait for subsequent cycle.
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| CN112524004B (en) * | 2020-11-28 | 2022-05-06 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Submersible motor reciprocating pump and self-sensing-based intelligent decision method thereof |
| CN114718527A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气股份有限公司 | Sinking pressure control method and device, computer equipment and storage medium |
| CN114718527B (en) * | 2021-01-06 | 2024-05-28 | 中国石油天然气股份有限公司 | Sinking pressure control method and device, computer equipment and storage medium |
| CN113266318A (en) * | 2021-05-28 | 2021-08-17 | 陕西埃菲克能源科技有限公司 | Self-learning-based stroke frequency adjusting method for rod-type pumping unit well |
| CN114776268B (en) * | 2022-06-22 | 2022-09-09 | 陕西埃菲克能源科技有限公司 | Green low-carbon intelligent group control method and system for oil extraction system |
| CN114776268A (en) * | 2022-06-22 | 2022-07-22 | 陕西埃菲克能源科技有限公司 | Green low-carbon intelligent group control method and system for oil extraction system |
| CN117436319A (en) * | 2023-12-20 | 2024-01-23 | 中国石油大学(华东) | Oil pumping well production gas-oil ratio calculation method based on ground indicator diagram |
| CN117436319B (en) * | 2023-12-20 | 2024-03-19 | 中国石油大学(华东) | Oil pumping well production gas-oil ratio calculation method based on ground indicator diagram |
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