CN107939378A - A kind of surface drive screw pump wells hydrodynamic face real time acquiring method - Google Patents
A kind of surface drive screw pump wells hydrodynamic face real time acquiring method Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/047—Liquid level
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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Abstract
The invention belongs to technical field of petroleum extraction, more particularly to a kind of surface drive screw pump wells hydrodynamic face real time acquiring method.This method includes：Obtain well data, collection ground driving electrical motor for screw pump input active power and related oilwell parameter；Obtain polished rod moment of torsion Mr, the polished rod moment of torsion be by surface drive screw pump wells motor as obtained by deceleration transmission equipment passing power；Obtain the moment of torsion M needed for subsurface progressive cavity lifting fluid1；Obtain pump discharge pressure pout；According to above-mentioned recycling formula, you can obtain well fluid level value.The present invention only needs the surface drive screw pump wells motor input active power surveyed according to ground and related oilwell parameter, the real-time monitoring of face driving screw pump well dynamic liquid level over the ground can be achieved, with higher precision, the analysis of oil well real-time working condition can be improved and intelligent and information system management is horizontal, correspondingly reduce labour's material resources and production management cost, production efficiency is improved, has saved production cost.
Description
Technical field
The invention belongs to technical field of petroleum extraction, more particularly to a kind of surface drive screw pump wells hydrodynamic face to obtain in real time
Take method.
Background technology
In oilfield exploitation, well fluid level data are an important oil well management basic datas, it directly reflects
The fluid supply capacity of oil well, reflects stratum fluid production force situation and supply-discharge coordination relation, is surface drive screw pump wells production pipe
Reason evaluation and the important parameter optimized and revised.
In the implementation of the present invention, it is found by the applicant that at least having the following disadvantages in the prior art：
At present, each elephant usual acoustic ripple method and pressure bomb method etc. carry out dynamic liquid level monitoring.The former is in well head profit
Medication bullet explosion sounding or gas cylinder pass downwards as sound source, the vibration wave of generation along the annular space in oil pipe, casing
Broadcast, run into liquid level and produce back wave, receive back wave using well head microphone and calculate the depth of liquid level.Although this method work
Skill is simple, easy to implement, but time-consuming and laborious, poor in timeliness, and the cycle is grown, in addition, gas and oil is higher or viscous crude production
In well, " foam section " or " dead oil block " influences existing at tubing and casing annular space so that the test result error of acquisition is very
Greatly, some heavy oil wells can not even be tested, and have impact on the correct evaluation to oilfield producing well.The latter is according to oil well ring
Aerial barometric gradient mutation determines level, although this method precision is higher, construction is complicated, measures long in time limit, technology
It is required that it is high, it is difficult in maintenance and of high cost, can not large-scale promotion application.
Above two mode can not realize the real-time monitoring of well fluid level, it is impossible to meet the letter of current oil well production
The needs of breathization, intelligent construction.
The content of the invention
For the above-mentioned prior art there are problem, the present invention provides a kind of ground for surface drive screw pump wells and drives
Dynamic screw pump well dynamic liquid level real time acquiring method, to realize the real-time monitoring of well fluid level.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of surface drive screw pump wells hydrodynamic face real time acquiring method, the acquisition methods include：
Obtain well data, collection ground driving electrical motor for screw pump input active power and related oilwell parameter；
Obtain polished rod moment of torsion Mr, the polished rod moment of torsion is to pass through deceleration transmission equipment by surface drive screw pump wells motor
Obtained by passing power；
Obtain the moment of torsion M needed for subsurface progressive cavity lifting fluid1；
Obtain pump discharge pressure pout；
According to formula 1) obtain well fluid level value, the formula 1) be：
Formula 1) in, hfFor well fluid level, m；hpumpFor lower-continuous mapping, m；PNFor surface drive screw pump wells Rated motor
Power, kW；PmFor the active power of surface drive screw pump wells motor input, kW； n0Spiral shell is driven for the ground under light condition
Bar pump sump motor speed, r/min；nNFor the surface drive screw pump wells Rated motor rotating speed under light condition, r/min；ρlFor
Lift the averag density of fluid, g/cm3；MrFor polished rod moment of torsion, N.m；QtFor oil well daily fluid production rate, t/d；igFor the biography of reduction box
Dynamic ratio, zero dimension；ib(it is related with driving head type to whether there is belt transmission, when there is no belt transmission for belt transmission ratio
When, acquiescence belt transmission ratio is 1) zero dimension；pgfAnnular pressure at hydrodynamic face, MPa；ρoFor oil density, g/cm3；； g
For acceleration of gravity, g=9.8m/s2。
Further, the acquisition polished rod moment of torsion MrIncluding：
Utilize formula 2) obtain polished rod moment of torsion Mr, the formula 2) be：
Formula 2) in, MrFor polished rod moment of torsion, N.m；PmFor the active power of motor input, kW；PNFor motor rated power,
kW；ηmFor electric efficiency, decimal；ηgFor reduction box transmission efficiency, decimal；ηb(passed for Belt Transmission Efficiency with the presence or absence of belt
It is dynamic related with driving head type, when there is no during belt transmission, acquiescence Belt Transmission Efficiency is 1) decimal；igFor reduction box
Gearratio, zero dimension；ib(it is related with driving head type to whether there is belt transmission for belt transmission ratio, to be passed when there is no belt
When dynamic, acquiescence belt transmission ratio is 1) zero dimension；n0For the motor speed under light condition, r/min；nNTurn for Rated motor
Speed, r/min.
Further, the formula 2) determination mode be：
Utilize formula 3) obtain polished rod horsepower Pr, the formula 3) be
Pr=Pm·ηm·ηg·ηbFormula 3)；
Formula 3) in, PrFor the polished rod horsepower of surface drive screw pump wells, kW；PmFor the active power of motor input, kW；ηm
For electric efficiency, decimal；ηgFor reduction box transmission efficiency, decimal；ηbIt is that Belt Transmission Efficiency (with the presence or absence of belt transmission and is driven
Dynamic head type is related, when there is no during belt transmission, acquiescence Belt Transmission Efficiency is 1) decimal；
Utilize formula 4), formula 5) and formula 6), then composite type 3) can determine that formula 2), the formula 4), formula 5) and formula 6) respectively
For：
Formula 4), formula 5) and formula 6) in, MrFor polished rod moment of torsion, N.m；nrFor polished rod rotating speed, r/min；igFor the transmission of reduction box
Than zero dimension；ib(it is related with driving head type to whether there is belt transmission, when there is no belt transmission for belt transmission ratio
When, acquiescence belt transmission ratio is 1) zero dimension；nmFor motor output shaft rotating speed, r/min；PNFor motor rated power, kW；n0
For the motor speed under light condition, r/min；nNFor Rated motor rotating speed, r/min.
Further, the moment of torsion M obtained needed for subsurface progressive cavity lifting fluid1Including：
Utilize formula 7) obtain subsurface progressive cavity lifting fluid needed for moment of torsion M1, the formula 7) be：
Wherein,
M4=91.3 δo-n0.45+ 46.5 formulas 10)；
Formula 7), formula 8), formula 9), formula 10) and formula 11) in, M1The moment of torsion needed for fluid, N.m are lifted for subsurface progressive cavity；M2
The moment of torsion needed for the fluid friction in oil pipe, N.m are overcome for rod string；M3For rod string overcome roofbolt and centralizer and
Tube wall occurs friction, collides required moment of torsion, N.m；M4Overcome for rod string and rub between subsurface progressive cavity internal rotor, stator
Required moment of torsion, N.m；M5The inertia torque overcome needed for sucker rod is driven (to disregard under normal operating conditions for startup stage
Enter to consider), N.m；μiFor the average viscosity of the lifting fluid on the oil pipe corresponding to i-th section of sucker rod, mPa.s；D is oil pipe
Internal diameter, mm；D for oil pumping shank diameter, mm；LiGrown for i-th with sucker rod bar, m；K is sucker rod division number；DjgFor sucker rod
The box cupling diameter of column, m；F is friction coefficient；G is every meter of rod string weight, N/m；LtiFor i-th section of roofbolt top-to-bottom
Length, m；LfiFor the length of centralizer, m；hfDynamic oil level, m；DbFor pump rotor diameter, cm；For in i-th section of roofbolt
Representatively a well rake angle, degree；kfFor the number of centralizer；δoFor the initial interference between pumping of screw pump inner stator and rotor,
mm；N is screw pump rotor rotating speed (consistent with sucker rod rotating speed during normal operation), r/min；NrTo drive the work(of rod string
Rate, W； GriFor the rod weight of i-stage rod string unit length, N/m；LriFor the length of i-stage sucker rod, m.
Further, the acquisition pump discharge pressure poutUsing Beggs-Brill methods or Orkiszewski methods
Obtain.
Further, the formula 1) determination mode be：
Establish based on moment of torsion M needed for lifting fluid1Submergence computation model, the computation model is：
Formula 12) in, NbThe power needed for fluid, W are lifted for screw pump；nrFor polished rod rotating speed, r/min； ΔpBFor screw rod
Pump pump inlet outlet pressure differential, MPa；QtFor oil well daily fluid production rate, t/d；ρlTo lift the averag density of fluid, g/cm3；
Utilize formula 12) obtain pumping of screw pump inlet outlet pressure differential：
Formula 13) in, Δ pBFor pumping of screw pump inlet outlet pressure differential, MPa；nrFor polished rod rotating speed, r/min；ρlTo lift fluid
Averag density, g/cm3；M1The moment of torsion needed for fluid, N.m are lifted for subsurface progressive cavity；QtFor oil well daily fluid production rate, t/d；
According to formula 12), formula 13), formula 5) and formula 6), establish formula 14), to obtain pump inlet pressure pin, the formula 14) be：
Formula 14) in, pinFor pressure at Pump Suction Nozzle, MPa；poutFor pressure at pump discharge；
Analyzed by oil jacket annular pressure, oil well annular space is divided into air column section and oil column section by boundary of hydrodynamic face, according to air column
Pressure is distributed and utilizes formula 15), calculate the annular pressure at hydrodynamic face, the formula 15) be：
Formula 15) in, pgfAnnular pressure at hydrodynamic face, MPa；pcFor casing pressure, MPa；ρg0For gas density under mark condition, kg/
m3；T0For temperature under mark condition, K；p0For pressure under mark condition, MPa；TavFor mean temperature, K；ZavFor mean temperature and average pressure
Under Gas Compression Factor, decimal；G is acceleration of gravity, g=9.8m/s2；
Composite type 14) and formula 15) dynamic oil level calculating formula 16 can be obtained), the formula 16) be：
Formula 16) in, hfFor well fluid level, m；hpumpFor lower-continuous mapping, m；PNFor surface drive screw pump wells motor volume
Determine power, kW；PmFor the active power of surface drive screw pump wells motor input, kW； n0For the ground driving under light condition
Electrical motor for screw pump rotating speed, r/min；nNFor the surface drive screw pump wells Rated motor rotating speed under light condition, r/min；ρl
To lift the averag density of fluid, g/cm3；MrFor polished rod moment of torsion, N.m；QtFor oil well daily fluid production rate, t/d；igFor reduction box
Gearratio, zero dimension；ib(it is related with driving head type to whether there is belt transmission for belt transmission ratio, to be passed when there is no belt
When dynamic, acquiescence belt transmission ratio is 1) zero dimension；pgfAnnular pressure at hydrodynamic face, MPa；ρoFor oil density, g/cm3；；
G is acceleration of gravity, g=9.8m/s2。
The beneficial effects of the invention are as follows：
A kind of surface drive screw pump wells hydrodynamic face real time acquiring method of the present invention, it is only necessary to surveyed according to ground
Surface drive screw pump wells motor inputs active power and related oilwell parameter, you can surface drive screw pump wells are moved in realization
The real-time monitoring of liquid level, has higher precision, can improve the analysis of oil well real-time working condition and intelligent and information system management water
It is flat, labour's material resources and production management cost are correspondingly reduced, improve production efficiency, have saved production cost.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, required in being described below to embodiment
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of flow signal of surface drive screw pump wells hydrodynamic face real time acquiring method of the embodiment of the present invention
Figure.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained without making creative work it is all its
His embodiment, belongs to the scope of protection of the invention.
Fig. 1 is a kind of flow signal of surface drive screw pump wells hydrodynamic face real time acquiring method of the embodiment of the present invention
Figure.Referring to Fig. 1, which includes：
S1：Obtain well data, collection ground driving electrical motor for screw pump input active power and related oilwell parameter；
S2：Obtain polished rod moment of torsion Mr, polished rod moment of torsion is to be transmitted by ground driving screw pump motor by deceleration transmission equipment
Obtained by power；
S3：Obtain the moment of torsion M needed for subsurface progressive cavity lifting fluid1；
S4：Obtain pump discharge pressure pout；
S5：According to formula 1) obtain well fluid level value, the formula 1) be：
Formula 1) in, hfFor well fluid level, m；hpumpFor lower-continuous mapping, m；PNFor surface drive screw pump wells Rated motor
Power, kW；PmFor the active power of surface drive screw pump wells motor input, kW； n0Spiral shell is driven for the ground under light condition
Bar pump sump motor speed, r/min；nNFor the surface drive screw pump wells Rated motor rotating speed under light condition, r/min；ρlFor
Lift the averag density of fluid, g/cm3；MrFor polished rod moment of torsion, N.m；QtFor oil well daily fluid production rate, t/d；igFor the biography of reduction box
Dynamic ratio, zero dimension；ib(it is related with driving head type to whether there is belt transmission, when there is no belt transmission for belt transmission ratio
When, acquiescence belt transmission ratio is 1) zero dimension；pgfAnnular pressure at hydrodynamic face, MPa；ρoFor oil density, g/cm3；； g
For acceleration of gravity, g=9.8m/s2。
Further, in the embodiment of the present invention, polished rod moment of torsion M is obtainedrIncluding：
Electrical motor for screw pump is driven to establish and inputted based on ground motor to the moment of torsion transfer study between polished rod to ground
Active power and polished rod torque relationship model, which is formula 2), utilize formula 2) obtain polished rod moment of torsion Mr, the formula 2)
For：
Formula 2) in, MrFor polished rod moment of torsion, N.m；PmFor the active power of motor input, kW；PNFor motor rated power,
kW；ηmFor electric efficiency, decimal；ηgFor reduction box transmission efficiency, decimal；ηb(passed for Belt Transmission Efficiency with the presence or absence of belt
It is dynamic related with driving head type, when there is no during belt transmission, acquiescence Belt Transmission Efficiency is 1) decimal；igFor reduction box
Gearratio, zero dimension；ib(it is related with driving head type to whether there is belt transmission for belt transmission ratio, to be passed when there is no belt
When dynamic, acquiescence belt transmission ratio is 1) zero dimension；n0For the motor speed under light condition, r/min；nNTurn for Rated motor
Speed, r/min.
Further, the formula 2 of the embodiment of the present invention) determination mode be：
Utilize formula 3) obtain polished rod horsepower Pr, the formula 3) be
Pr=Pm·ηm·ηg·ηbFormula 3)；
Formula 3) in, PrFor the polished rod horsepower of surface drive screw pump wells, kW；PmFor the active power of motor input, kW；ηm
For electric efficiency, decimal；ηgFor reduction box transmission efficiency, decimal；ηbIt is that Belt Transmission Efficiency (with the presence or absence of belt transmission and is driven
Dynamic head type is related, when there is no during belt transmission, acquiescence Belt Transmission Efficiency is 1) decimal；
Utilize formula 4), formula 5) and formula 6), then composite type 3) can determine that formula 2), the formula 4), formula 5) and formula 6) respectively
For：
Formula 4), formula 5) and formula 6) in, MrFor polished rod moment of torsion, N.m；nrFor polished rod rotating speed, r/min；igFor the transmission of reduction box
Than zero dimension；ib(it is related with driving head type to whether there is belt transmission, when there is no belt transmission for belt transmission ratio
When, acquiescence belt transmission ratio is 1) zero dimension；nmFor motor output shaft rotating speed, r/min；PNFor motor rated power, kW；n0
For the motor speed under light condition, r/min；nNFor Rated motor rotating speed, r/min.
The polished rod moment of torsion of the embodiment of the present invention provides total torsion of the underground sucker rod column needed for screw pump rotor rotation
Square, moment of torsion, the rod string that underground moment of torsion mainly includes needed for screw pump lifting fluid are overcome needed for the fluid friction in oil pipe
Moment of torsion, rod string overcomes roofbolt and centralizer and friction occurs for tube wall, the moment of torsion needed for collision, rod string overcome well
The lower required moment of torsion that rubs between inner rotor of screw pump and stator, drive the inertia torque overcome needed for sucker rod in startup stage.
Therefore, lift the moment of torsion needed for fluid and subtract other each several part moments of torsion composition equal to polished rod moment of torsion, based on above-mentioned theory, this hair
In bright embodiment, the moment of torsion M needed for subsurface progressive cavity lifting fluid is obtained1Including：
Utilize formula 7) obtain subsurface progressive cavity lifting fluid needed for moment of torsion M1, the formula 7) be：
Wherein,
M4=91.3 δo-n0.45+ 46.5 formulas 10)；
Formula 7), formula 8), formula 9), formula 10) and formula 11) in, M1The moment of torsion needed for fluid, N.m are lifted for subsurface progressive cavity；M2
The moment of torsion needed for the fluid friction in oil pipe, N.m are overcome for rod string；M3For rod string overcome roofbolt and centralizer and
Tube wall occurs friction, collides required moment of torsion, N.m；M4Overcome for rod string and rub between subsurface progressive cavity internal rotor, stator
Required moment of torsion, N.m；M5The inertia torque overcome needed for sucker rod is driven (to disregard under normal operating conditions for startup stage
Enter to consider), N.m；μiFor the average viscosity of the lifting fluid on the oil pipe corresponding to i-th section of sucker rod, mPa.s；D is oil pipe
Internal diameter, mm；For shank diameter of pumping, mm；LiGrown for i-th with sucker rod bar, m；K is sucker rod division number；DjgFor rod string
Box cupling diameter, m；F is friction coefficient；G is every meter of rod string weight, N/m；LtiFor i-th section of roofbolt top-to-bottom
Length, m；LfiFor the length of centralizer, m；hfDynamic oil level, m；DbFor pump rotor diameter, cm；For generation in i-th section of roofbolt
The hole deviation angle of table, degree；kfFor the number of centralizer；δoFor the initial interference between pumping of screw pump inner stator and rotor, mm；
N is screw pump rotor rotating speed (consistent with sucker rod rotating speed during normal operation), r/min；NrTo drive the power of rod string,
W； GriFor the rod weight of i-stage rod string unit length, N/m；LriFor the length of i-stage sucker rod, m.
In the embodiment of the present invention, the pump discharge pressure poutUsing Beggs-Brill methods or Orkiszewski side
Method obtains.
In the embodiment of the present invention, formula 1) determination mode be：
Establish based on moment of torsion M needed for lifting fluid1Submergence computation model, the computation model is：
Formula 12) in, NbThe power needed for fluid, W are lifted for screw pump；nrFor polished rod rotating speed, r/min； ΔpBFor screw rod
Pump pump inlet outlet pressure differential, MPa；QtFor oil well daily fluid production rate, t/d；ρlTo lift the averag density of fluid, g/cm3；
Utilize formula 12) obtain pumping of screw pump inlet outlet pressure differential：
Formula 13) in, Δ pBFor pumping of screw pump inlet outlet pressure differential, MPa；nrFor polished rod rotating speed, r/min；ρlTo lift fluid
Averag density, g/cm3；M1The moment of torsion needed for fluid, N.m are lifted for subsurface progressive cavity；QtFor oil well daily fluid production rate, t/d；
According to formula 12), formula 13), formula 5) and formula 6), establish formula 14), be discharged into a mouthful pressure p to obtain pumpin, the formula 14)
For：
Formula 14) in, pinFor pressure at Pump Suction Nozzle, MPa；poutFor pressure at pump discharge；
Analyzed by oil jacket annular pressure, oil well annular space is divided into air column section and oil column section by boundary of hydrodynamic face, according to air column
Pressure is distributed and utilizes formula 15), calculate the annular pressure at hydrodynamic face, the formula 15 of the embodiment of the present invention) be：
Formula 15) in, pgfAnnular pressure at hydrodynamic face, MPa；pcFor casing pressure, MPa；ρg0For gas density under mark condition, kg/
m3；T0For temperature under mark condition, K；p0For pressure under mark condition, MPa；TavFor mean temperature, K；ZavFor mean temperature and average pressure
Under Gas Compression Factor, decimal；G is acceleration of gravity, g=9.8m/s2；
Composite type 14) and formula 15) dynamic oil level calculating formula 16 can be obtained), the formula 16) be：
Formula 16) in, hfFor well fluid level, m；hpumpFor lower-continuous mapping, m；PNFor surface drive screw pump wells motor volume
Determine power, kW；PmFor the active power of surface drive screw pump wells motor input, kW； n0For the ground driving under light condition
Electrical motor for screw pump rotating speed, r/min；nNFor the surface drive screw pump wells Rated motor rotating speed under light condition, r/min；ρl
To lift the averag density of fluid, g/cm3；MrFor polished rod moment of torsion, N.m；QtFor oil well daily fluid production rate, t/d；igFor reduction box
Gearratio, zero dimension；ib(it is related with driving head type to whether there is belt transmission for belt transmission ratio, to be passed when there is no belt
When dynamic, acquiescence belt transmission ratio is 1) zero dimension；pgfAnnular pressure at hydrodynamic face, MPa；ρoFor oil density, g/cm3；；
G is acceleration of gravity, g=9.8m/s2。
Example calculation
Calculating analysis is carried out by taking live a bite surface drive screw pump wells J1 wells as an example, the relevant parameter of the oil well is shown in Table 1,
Table 2 is well actual measurement active power data interior for a period of time, since electrical parameter has slight fluctuations, with 100 points
The active power that the average value of actual measurement active power is inputted as motor in clock time section, its average value is 1.56kW.
Table 1
According to above-mentioned parameter, surface drive screw pump wells software for calculation is worked out using Visual Basic language, into action
Liquid level calculates.It is as follows to calculate correlated results：
Table 2
According to table 2, hydrodynamic face result of calculation is 498.3m, and actual measurement dynamic oil level is 465m, its relative error is
7.16%, absolute error 33.3m, in the error range that engineering allows, show that the model possesses practicality, can be existing
Field provides theoretical and technical support.
In conclusion a kind of surface drive screw pump wells hydrodynamic face real time acquiring method of the embodiment of the present invention, compared to
Acquisition methods of the prior art, it is only necessary to according to ground survey surface drive screw pump wells motor input active power and
Related oilwell parameter, you can realize the real-time monitoring to ground driving screw pump well dynamic liquid level, there is higher precision, can carry
High oil well real-time working condition analysis and intelligent and information system management are horizontal, correspondingly reduce labour's material resources and production management
Cost, improves production efficiency, has saved production cost.
Embodiment provided above is the better embodiment of the present invention, is only used for the convenient explanation present invention, not to this hair
The limitation of bright work in any form, any those of ordinary skill in the art, if putting forward skill not departing from the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from the technical feature content of the present invention, in the range of still falling within the technology of the present invention feature.
Claims (6)
1. a kind of surface drive screw pump wells hydrodynamic face real time acquiring method, it is characterised in that the acquisition methods include：
Obtain well data, collection ground driving electrical motor for screw pump input active power and related oilwell parameter；
Obtain polished rod moment of torsion Mr, the polished rod moment of torsion is to be moved by surface drive screw pump wells motor by deceleration transmission equipment transmission
Obtained by power；
Obtain the moment of torsion M needed for subsurface progressive cavity lifting fluid1；
Obtain pump discharge pressure pout；
According to formula 1) obtain well fluid level value, the formula 1) be：
Formula 1) in, hfFor well fluid level, m；hpumpFor lower-continuous mapping, m；PNFor surface drive screw pump wells motor rated power,
kW；PmFor the active power of surface drive screw pump wells motor input, kW；n0For the surface drive screw pump wells under light condition
Motor speed, r/min；nNFor the surface drive screw pump wells Rated motor rotating speed under light condition, r/min；ρlTo lift fluid
Averag density, g/cm3；MrFor polished rod moment of torsion, N.m；QtFor oil well daily fluid production rate, t/d；igFor the gearratio of reduction box, it is no because
It is secondary；ibFor belt transmission ratio (it is related with driving head type with the presence or absence of belt transmission, when there is no during belt transmission, acquiescence skin
V belt translation ratio is 1) zero dimension；pgfAnnular pressure at hydrodynamic face, MPa；ρoFor oil density, g/cm3；；G accelerates for gravity
Degree, g=9.8m/s2。
A kind of 2. surface drive screw pump wells hydrodynamic face real time acquiring method according to claim 1, it is characterised in that institute
State and obtain polished rod moment of torsion MrIncluding：
Utilize formula 2) obtain polished rod moment of torsion Mr, the formula 2) be：
Formula 2) in, MrFor polished rod moment of torsion, N.m；PmFor the active power of motor input, kW；PNFor motor rated power, kW；ηmFor
Electric efficiency, decimal；ηgFor reduction box transmission efficiency, decimal；ηbIt is that Belt Transmission Efficiency (with the presence or absence of belt transmission and drives
Head type is related, when there is no during belt transmission, acquiescence Belt Transmission Efficiency is 1) decimal；igFor the gearratio of reduction box, nothing
Dimension；ibFor belt transmission ratio (it is related with driving head type with the presence or absence of belt transmission, when there is no during belt transmission, giving tacit consent to
Belt transmission ratio is 1) zero dimension；n0For the motor speed under light condition, r/min；nNFor Rated motor rotating speed, r/min.
A kind of 3. surface drive screw pump wells hydrodynamic face real time acquiring method according to claim 2, it is characterised in that institute
State formula 2) determination mode be：
Utilize formula 3) obtain polished rod horsepower Pr, the formula 3) be
Pr=Pm·ηm·ηg·ηbFormula 3)；
Formula 3) in, PrFor the polished rod horsepower of surface drive screw pump wells, kW；PmFor the active power of motor input, kW；ηmFor electricity
Engine efficiency, decimal；ηgFor reduction box transmission efficiency, decimal；ηb(it whether there is belt transmission and driving head for Belt Transmission Efficiency
Type is related, when there is no during belt transmission, acquiescence Belt Transmission Efficiency is 1) decimal；
Utilize formula 4), formula 5) and formula 6), then composite type 3) can determine that formula 2), the formula 4), formula 5) and formula 6) be respectively：
Formula 4), formula 5) and formula 6) in, MrFor polished rod moment of torsion, N.m；nrFor polished rod rotating speed, r/min；igFor the gearratio of reduction box,
Zero dimension；ibFor belt transmission ratio (it is related with driving head type with the presence or absence of belt transmission, it is silent when there is no during belt transmission
It is 1) zero dimension to recognize belt transmission ratio；nmFor motor output shaft rotating speed, r/min；PNFor motor rated power, kW；n0For zero load
Motor speed under state, r/min；nNFor Rated motor rotating speed, r/min.
A kind of 4. surface drive screw pump wells hydrodynamic face real time acquiring method according to claim 3, it is characterised in that institute
State the moment of torsion M obtained needed for subsurface progressive cavity lifting fluid1Including：
Utilize formula 7) obtain subsurface progressive cavity lifting fluid needed for moment of torsion M1, the formula 7) be：
Wherein,
M4=91.3 δo-n0.45+ 46.5 formulas 10)；
Formula 7), formula 8), formula 9), formula 10) and formula 11) in, M1The moment of torsion needed for fluid, N.m are lifted for subsurface progressive cavity；M2To take out
Beam hanger column overcomes the moment of torsion needed for the fluid friction in oil pipe, N.m；M3Roofbolt is overcome to be sent out with centralizer and tube wall for rod string
Moment of torsion needed for raw friction, collision, N.m；M4Overcome the required torsion that rubs between subsurface progressive cavity internal rotor, stator for rod string
Square, N.m；M5The inertia torque (being not counted in consideration under normal operating conditions) overcome needed for sucker rod is driven for startup stage,
N.m；μiFor the average viscosity of the lifting fluid on the oil pipe corresponding to i-th section of sucker rod, mPa.s；D is pipe aperture, mm；d
For shank diameter of pumping, mm；LiGrown for i-th with sucker rod bar, m；K is sucker rod division number；DjgIt is straight for the box cupling of rod string
Footpath, m；F is friction coefficient；G is every meter of rod string weight, N/m；LtiFor the length of i-th section of roofbolt top-to-bottom, m；
LfiFor the length of centralizer, m；hfDynamic oil level, m；DbFor pump rotor diameter, cm；For representatively a well in i-th section of roofbolt
Rake angle, degree；kfFor the number of centralizer；δoFor the initial interference between pumping of screw pump inner stator and rotor, mm；N is screw pump
Rotor speed (consistent with sucker rod rotating speed during normal operation), r/min；NrTo drive the power of rod string, W；GriFor i-stage
The rod weight of rod string unit length, N/m；LriFor the length of i-stage sucker rod, m.
A kind of 5. surface drive screw pump wells hydrodynamic face real time acquiring method according to claim 1, it is characterised in that institute
State pump discharge pressure poutObtained using Beggs-Brill methods or Orkiszewski methods.
A kind of 6. surface drive screw pump wells hydrodynamic face real time acquiring method according to claim 3, it is characterised in that institute
State formula 1) determination mode be：
Establish based on moment of torsion M needed for lifting fluid1Submergence computation model, the computation model is：
Formula 12) in, NbThe power needed for fluid, W are lifted for screw pump；nrFor polished rod rotating speed, r/min；ΔpBFor pumping of screw pump into
Export pressure difference, MPa；QtFor oil well daily fluid production rate, t/d；ρlTo lift the averag density of fluid, g/cm3；
Utilize formula 12) obtain pumping of screw pump inlet outlet pressure differential：
Formula 13) in, Δ pBFor pumping of screw pump inlet outlet pressure differential, MPa；nrFor polished rod rotating speed, r/min；ρlFor being averaged for lifting fluid
Density, g/cm3；M1The moment of torsion needed for fluid, N.m are lifted for subsurface progressive cavity；QtFor oil well daily fluid production rate, t/d；
According to formula 12), formula 13), formula 5) and formula 6), establish formula 14), be discharged into a mouthful pressure p to obtain pumpin, the formula 14) be：
Formula 14) in, pinFor pressure at Pump Suction Nozzle, MPa；poutFor pressure at pump discharge；
Analyzed by oil jacket annular pressure, oil well annular space is divided into air column section and oil column section by boundary of hydrodynamic face, according to air column pressure
It is distributed and utilizes formula 15), calculate the annular pressure at hydrodynamic face, the formula 15) be：
Formula 15) in, pgfAnnular pressure at hydrodynamic face, MPa；pcFor casing pressure, MPa；ρg0For gas density under mark condition, kg/m3；T0
For temperature under mark condition, K；p0For pressure under mark condition, MPa；TavFor mean temperature, K；ZavFor the gas under mean temperature and average pressure
Body compressibility factor, decimal；G is acceleration of gravity, g=9.8m/s2；
Composite type 14) and formula 15) dynamic oil level calculating formula 16 can be obtained), the formula 16) be：
Formula 16) in, hfFor well fluid level, m；hpumpFor lower-continuous mapping, m；PNFor surface drive screw pump wells Rated motor work(
Rate, kW；PmFor the active power of surface drive screw pump wells motor input, kW；n0For the ground driving screw pump under light condition
Hole motor rotating speed, r/min；nNFor the surface drive screw pump wells Rated motor rotating speed under light condition, r/min；ρlFlowed for lifting
The averag density of body, g/cm3；MrFor polished rod moment of torsion, N.m；QtFor oil well daily fluid production rate, t/d；igFor the gearratio of reduction box, nothing
Dimension；ibFor belt transmission ratio (it is related with driving head type with the presence or absence of belt transmission, when there is no during belt transmission, giving tacit consent to
Belt transmission ratio is 1) zero dimension；pgfAnnular pressure at hydrodynamic face, MPa；ρoFor oil density, g/cm3；；G accelerates for gravity
Degree, g=9.8m/s2。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374867A (en) * | 2019-05-31 | 2019-10-25 | 承德石油高等专科学校 | A kind of revolving speed calculation method based on single screw rod pump sump submergence |
| CN111119794A (en) * | 2019-11-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Method for calculating supply and production balance rotating speed of electric submersible direct-drive screw pump oil production well |
| CN115859530A (en) * | 2023-01-18 | 2023-03-28 | 西南石油大学 | Oil well pump health state evaluation method based on dimensionless pump efficiency |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996691A (en) * | 1996-10-25 | 1999-12-07 | Norris; Orley (Jay) | Control apparatus and method for controlling the rate of liquid removal from a gas or oil well with a progressive cavity pump |
| CA2303983A1 (en) * | 1999-04-12 | 2000-10-12 | Kudu Industries Inc. | Method and apparatus for controlling the liquid level in a well |
| CN1782389A (en) * | 2004-12-01 | 2006-06-07 | 中国石油天然气股份有限公司 | Leakage diagnosing method for ground driving screw pump oil production well |
| CN1851268A (en) * | 2006-06-13 | 2006-10-25 | 大庆油田有限责任公司 | Screw pump well pump condition electric parameter detecting method |
| CN201381846Y (en) * | 2009-03-24 | 2010-01-13 | 深圳市新爱达自动化仪表有限公司 | Screw pump well dynamic liquid level monitoring device |
| CN102072151A (en) * | 2010-12-31 | 2011-05-25 | 大庆油田有限责任公司 | Method for controlling operation of screw pump well by utilizing dynamic control chart of screw pump well |
| CA2841412A1 (en) * | 2011-07-14 | 2013-01-17 | Unico, Inc. | Estimating fluid levels in a progressing cavity pump system |
| US20140088875A1 (en) * | 2011-05-06 | 2014-03-27 | Schneider Electric USA, Inc. | Pumpjack torque fill estimation |
| CN105134178A (en) * | 2015-08-31 | 2015-12-09 | 中国石油化工股份有限公司 | Oil well liquid level measuring method and device |
| CN106777709A (en) * | 2016-12-21 | 2017-05-31 | 中国石油大学(华东) | The method that submerged electric oil pump well hydrodynamic face based on ground actual measurement electrical parameter calculates |
-
2017
- 2017-11-30 CN CN201711237859.4A patent/CN107939378B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996691A (en) * | 1996-10-25 | 1999-12-07 | Norris; Orley (Jay) | Control apparatus and method for controlling the rate of liquid removal from a gas or oil well with a progressive cavity pump |
| CA2303983A1 (en) * | 1999-04-12 | 2000-10-12 | Kudu Industries Inc. | Method and apparatus for controlling the liquid level in a well |
| CN1782389A (en) * | 2004-12-01 | 2006-06-07 | 中国石油天然气股份有限公司 | Leakage diagnosing method for ground driving screw pump oil production well |
| CN1851268A (en) * | 2006-06-13 | 2006-10-25 | 大庆油田有限责任公司 | Screw pump well pump condition electric parameter detecting method |
| CN201381846Y (en) * | 2009-03-24 | 2010-01-13 | 深圳市新爱达自动化仪表有限公司 | Screw pump well dynamic liquid level monitoring device |
| CN102072151A (en) * | 2010-12-31 | 2011-05-25 | 大庆油田有限责任公司 | Method for controlling operation of screw pump well by utilizing dynamic control chart of screw pump well |
| US20140088875A1 (en) * | 2011-05-06 | 2014-03-27 | Schneider Electric USA, Inc. | Pumpjack torque fill estimation |
| CA2841412A1 (en) * | 2011-07-14 | 2013-01-17 | Unico, Inc. | Estimating fluid levels in a progressing cavity pump system |
| CN105134178A (en) * | 2015-08-31 | 2015-12-09 | 中国石油化工股份有限公司 | Oil well liquid level measuring method and device |
| CN106777709A (en) * | 2016-12-21 | 2017-05-31 | 中国石油大学(华东) | The method that submerged electric oil pump well hydrodynamic face based on ground actual measurement electrical parameter calculates |
Non-Patent Citations (7)
| Title |
|---|
| 吴晓东等: "地面驱动螺杆泵井节点系统优化设计技术", 《石油大学学报(自然科学版)》 * |
| 李大龙: "螺杆泵高流压现状及电参数推算液面方法", 《化学工程与装备》 * |
| 王旱祥等: "地面驱动单螺杆泵杆柱的组合设计", 《石油机械》 * |
| 罗 敏等: "地面驱动螺杆泵动液面高度控制方法研究", 《钻采工艺》 * |
| 罗 敏等: "地面驱动螺杆泵恒液面控制方法", 《石油钻采工艺》 * |
| 陈 实等: "螺杆泵井电参数法工况诊断技术", 《石油矿场机械》 * |
| 陈伟刚: "螺杆泵井动液面的电功率计深方法研究与应用", 《石油工业技术监督》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374867A (en) * | 2019-05-31 | 2019-10-25 | 承德石油高等专科学校 | A kind of revolving speed calculation method based on single screw rod pump sump submergence |
| CN111119794A (en) * | 2019-11-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Method for calculating supply and production balance rotating speed of electric submersible direct-drive screw pump oil production well |
| CN111119794B (en) * | 2019-11-18 | 2022-05-10 | 中国石油天然气股份有限公司 | Method for calculating supply and production balance rotating speed of electric submersible direct-drive screw pump oil production well |
| CN115859530A (en) * | 2023-01-18 | 2023-03-28 | 西南石油大学 | Oil well pump health state evaluation method based on dimensionless pump efficiency |
| CN115859530B (en) * | 2023-01-18 | 2023-08-11 | 西南石油大学 | Oil pump health state evaluation method based on dimensionless pump efficiency |
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