CN211201909U - Intelligent intermittent pumping control system of oil field beam pumping unit - Google Patents
Intelligent intermittent pumping control system of oil field beam pumping unit Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 141
- 239000003129 oil well Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000003921 oil Substances 0.000 claims description 41
- 238000006073 displacement reaction Methods 0.000 claims description 22
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000010779 crude oil Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 abstract description 148
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- 238000012544 monitoring process Methods 0.000 abstract description 2
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- 238000000605 extraction Methods 0.000 description 12
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- 238000005457 optimization Methods 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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Abstract
The utility model provides a control system is taken out between intelligence of oil field beam-pumping unit, based on to beam-pumping unit crank position, motor speed and electrical parameter monitoring analysis, through electric work diagram inversion polished rod indicator diagram and controller integrated analysis, calculate and to guarantee the system of taking out between of the high-efficient operation of low liquid volume oil well, export for the motor by the controller and carry out, realized taking out control between beam-pumping unit intelligence. In addition, the positive electric diagram is mainly corrected through the polished rod indicator diagram, the fullness of the corrected electric diagram reaches a certain lower limit value, and the proportion of the number of the electric diagrams reaching the lower limit value in all the number of the electric diagrams in the interval pumping period reaches a specific target value, so that the interval pumping system/period is reasonable.
Description
Technical Field
The utility model belongs to the technical field of the oil field oil recovery, concretely relates to control system is taken out between oil field beam-pumping unit intelligence.
Background
In the process of petroleum production operation, when the permeability of the oil well is lower than the designed oil pumping capacity of the oil pumping unit, the oil well is in a state of insufficient liquid supply. In order to save electric energy, reduce mechanical wear of the pumping unit and improve the efficiency of equipment, the currently generally adopted control method is to perform automatic intermittent control on the pumping unit, namely when an oil well is detected to be in a state of insufficient liquid supply, the pumping unit is controlled to stop running, and the oil well enters a countdown state to wait for the natural recovery of the working fluid level of the oil well; when the determined shutdown time is over, the pumping unit is controlled to start again; this is repeated.
However, compared with the oil well with high liquid yield, the problem of yield reduction or low efficiency of the mechanical extraction system is caused to a certain extent due to unscientific manual intermittent extraction system, and in addition, the existing various intermittent extraction control optimization systems cannot ensure that the low liquid yield oil well can realize high-efficiency operation of stabilizing yield and reducing energy consumption.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an intelligent intermittent pumping control system of an oil field beam pumping unit, which aims to solve the problem that the high-efficiency operation cannot be realized when a low-liquid-volume oil well pumps oil intermittently; the second purpose is to solve the problems of yield reduction and low efficiency of a mechanical extraction system caused by the intermittent extraction of oil from low-liquid-volume oil wells.
In order to solve the technical problem, the utility model provides an intelligent intermittent pumping control system of an oil field beam-pumping unit, which comprises a database server, an upper computer, a well site RTU and a controller which are electrically connected in turn, wherein the controller is electrically connected with a display and a motor;
the rotating speed sensor, the electrical parameter sensor, the crank position sensor and the load displacement sensor are respectively connected with the controller.
Further, the electrical parameter sensor includes a voltage sensor for measuring a voltage of the motor, a current sensor for measuring a current of the motor, and a power factor sensor for measuring a power factor of the motor.
Preferably, the database server has the following data stored therein: intermittent pumping and stopping allowable value P, daily production fluid V of oil wellDaily liquidVolume water content n of crude oilwDensity of water ρwDensity rho of water-free crude oiloThe inner diameter of the sleeve is phiSleeveThe outer diameter of the oil pipe is phiOilDiameter D of oil well pumppPush awayProcedure S, sprint nPunching machineLambda, loss of stroke, Q, loss of pumpLeakage netPump inlet gas-liquid ratio R, pump clearance volume coefficient K, sinking pressure P of oil-well pumpsPressure P at oil pump outletdA polytropic process exponent n.
The utility model also provides a control method of utilizing oil field beam-pumping unit intelligence to take out control system between, including following step:
step S1, the upper computer calls the data stored in the database server, and calculates the initial value of the intermittent extraction system according to the called data;
s2, sending the initial value of the intermittent pumping system to a well site RTU by the upper computer, and calling the initial value of the intermittent pumping system from the well site RTU by the controller;
step S3, the controller draws a polish rod indicator diagram according to the load displacement data transmitted by the load displacement sensor and reflects the polish rod indicator diagram on the display;
step S4, the controller draws a motor-motor diagram according to the data transmitted by the rotation speed sensor, the electrical parameter sensor and the crank position sensor and reflects the diagram on the display;
step S5, correcting the electromechanical indicator diagram according to the polish rod indicator diagram;
step S6, self-defining the standard reaching rate and the target value of the electric diagram, and if the standard reaching rate of the electric diagram is within the threshold range of the target value, indicating that the intermittent pumping system is reasonable, and the beam pumping unit can take the initial value of the intermittent pumping system as an intermittent pumping period to perform intermittent pumping oil extraction; and if the standard reaching rate of the electric diagram is outside the threshold range of the target value, indicating that the intermittent pumping system is unreasonable, adjusting the initial value of the intermittent pumping system, and continuously repeating the second step to the sixth step until the standard reaching rate of the electric diagram finally reaches the target value.
Further, the initial value of the pumping system in step S1 includes an initial value of the well shut-in time t and an initial value of the well opening time t', and is jointly calculated according to the following formula:
wherein the allowable value of P-interval pumping stop well is 0.5 × 105Pa and VDaily productLiquid for treating urinary tract infectionOil well daily fluid production, m3D; t is the upper limit value of the well stopping time, h; n isw-volumetric water content of crude oil; rhowDensity of water, kg/m3；ρoDensity of crude oil without water, kg/m3；фSleeve-the casing internal diameter, m; phi shapeOil-tubing outside diameter, m;
in the formula: dp-the oil well pump diameter, m; s-stroke, m; n isPunching machineNumber of strokes, min-1(ii) a λ -stroke loss, m; qLeakage netOil-well pump leakage, m3/d；ηCharging device-pump fill factor;
in the formula: r-gas-liquid ratio of pump suction inlet, m3/m3(ii) a K-pump clearance volume coefficient; ps-the sinking pressure of the pump, Pa; pd-pump outlet pressure, Pa; n is the polytropic process exponent, n ≈ 1.1.
Preferably, the drawing of the polished rod indicator diagram in step S3 includes:
s301, a load displacement sensor collects different polished rod positions and loads in the oil pumping process and sends the different polished rod positions and loads to a controller;
s302, the controller draws the position S of the polished rodθAnd polish rod load NθThe relationship diagram of (1), namely the polish rod indicator diagram, is reflected on the display.
Further, the step S4 of drawing the motor electrical diagram includes:
s401, collecting different crank positions theta by a crank position sensor, and collecting motor rotating speed distribution omega of different crank positions theta by a rotating speed sensorθThe electric parameter sensor collects the current distribution I of the motor at different crank positions thetaθVoltage distribution U of motor at different crank positions θθAnd a power factor distribution cos θ of the motor at different crank positions θ;
s402, calculating the torque distribution T of the motor according to the following formulaθ：
In the formula: u shapeθ-voltage distribution of the motor at different crank positions θ; i isθ-current distribution of the motor for different crank positions θ; cos θ — power factor distribution of motors at different crank positions θ; omegaθ-motor speed distribution for different crank positions θ;
s403, checking a polished rod position factor and torque factor table of the pumping unit in the using specification of the beam pumping unit, and recording the polished rod position factor gamma of the pumping unitθEstablishing different crank position theta and polish rod position S according to formula fiveθEquation five is as follows:
Sθ＝S×γθformula five
In the formula: sθ-polished rod position, m; s-stroke, m; gamma rayθ-a polished rod position factor;
s404, establishing motor torque distribution TθAnd the position S of the polished rodθDrawing the position S of the polished rodθTorque T of motorθThe relationship diagram of (1), i.e. the motor power diagram, is reflected in the display.
Preferably, the step S5 of correcting the electromechanical power diagram according to the polished rod indicator diagram specifically includes:
and viewing the display, observing the relative positions of the polished rod indicator diagram and the motor electrical diagram in the display, adjusting the stroke S of the motor electrical diagram by taking the polished rod indicator diagram as a standard so that boundary points of the polished rod indicator diagram and the motor electrical diagram are superposed, and then removing the load displacement sensor to finish the correction of the motor electrical diagram.
Further, step S6 specifically includes:
s601, defining the standard reaching rate of the electric diagrams as the proportion of the number of the electric diagrams with the electric diagram fullness degree of more than or equal to 70% in the latest pumping period to all the electric diagrams in the pumping period, wherein the electric diagram fullness degree refers to the proportion of the electric diagrams and the polished rod indicator diagrams in the same pumping period;
s602, taking the electric diagram standard-reaching rate of more than or equal to 70% in the latest interval pumping period as a target value, and if the electric diagram standard-reaching rate is within the threshold range of the target value, indicating that the interval pumping system is reasonable, wherein the beam pumping unit can take the initial value of the interval pumping system as the interval pumping period to perform interval pumping oil extraction;
s603, if the standard reaching rate of the electric diagram is outside the threshold range of the target value, the intermittent pumping system is unreasonable, the initial value of the intermittent pumping system is adjusted in a +/-5% floating range, and the steps two to six are repeated continuously to enable the standard reaching rate of the electric diagram to float in the +/-5% range until the standard reaching rate of the electric diagram finally reaches the target value.
The utility model has the advantages as follows:
the utility model discloses an oil field beam-pumping unit intelligence is taken out control system and control method between, mainly remove the correction electricity merit figure through polished rod indicator diagram, and make the fullness of the electricity merit figure after the correction reach certain lower limit value, the number that reaches the electricity merit figure of this lower limit value simultaneously accounts for than reaching specific target value in taking out all electricity merit figure numbers within a period within a definite time, it is reasonable then to show that this time takes out system/cycle, furthermore, low liquid volume oil well can take out oil according to this time take out the cycle, realize the high-efficient operation of beam-pumping unit, the problem that output descends and mechanical extraction system efficiency is low has also been solved simultaneously.
In order to make the above and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent intermittent pumping control system of an oil field beam pumping unit.
Fig. 2 is a schematic diagram of a polished rod indicator diagram and an electrical diagram before correction in the same coordinate system.
Fig. 3 is a schematic diagram of a polished rod indicator diagram and an electrical diagram after correction in the same coordinate system.
Fig. 4 is a schematic diagram of the optimization logic algorithm of step S6.
Description of reference numerals:
1. an electric motor; 2. a pumping unit; 3. a polish rod; 4. a rotational speed sensor; 5. an electrical parameter sensor; 6. a crank position sensor; 7. a load displacement sensor; 8. a controller; 9. a display; 10. a database server; 11. an upper computer; 12. and (5) well site RTU.
Detailed Description
The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
First embodiment
The utility model discloses a first embodiment relates to an oil field beam-pumping unit intelligence is taken out control system between, as shown in figure 1, including database server 10, host computer 11, well site RTU12 and the controller 8 that connects gradually the electricity, display 9 and motor 1 are connected to controller 8 electricity, and motor 1 connects and drives beam-pumping unit 2, and beam-pumping unit 2's horse head connects polished rod 3, installs tacho sensor 4 and electrical parameter sensor 5 on the motor 1, installs crank position sensor 6 on beam-pumping unit 2's the crank, installs load displacement sensor 7 on polished rod 3;
the rotating speed sensor 4, the electrical parameter sensor 5, the crank position sensor 6 and the load displacement sensor 7 are respectively connected with a controller 8.
Specifically, the base data collected by the oil field is stored in the database server 10, the upper computer 11 calls the data stored in the database server 10, an intermittent pumping degree initial value is calculated according to the called data, the intermittent pumping degree initial value is sent to the well site RTU12 by the upper computer 11, the controller 8 calls the intermittent pumping degree initial value from the well site RTU12, the controller 8 draws a polish rod indicator diagram according to the load displacement data transmitted by the load displacement sensor 7 and reflects the polish rod indicator diagram on the display 9, and meanwhile, the controller 8 draws a motor-motor indicator diagram according to the data transmitted by the rotating speed sensor 4, the electrical parameter sensor 5 and the crank position sensor 6 and reflects the motor-motor indicator diagram on the display 9.
Preferably, the utility model discloses what controller 8 adopted is the controller of the SFC cable beam-pumping unit system optimization operation integrated control appearance model that harbingsuffi electrical technology limited produced.
Therefore, the intelligent intermittent pumping control system of the oil field beam pumping unit is mainly used for collecting, transmitting and storing data, and has an important function of calculating and drawing a polished rod indicator diagram and a motor electric diagram and correcting the motor electric diagram by using the polished rod indicator diagram so as to achieve a reasonable intermittent pumping system.
Second embodiment
Unlike the first embodiment, in the present embodiment, the electrical parameter sensor 5 includes a voltage sensor for measuring the voltage of the motor 1, a current sensor for measuring the current of the motor 1, and a power factor sensor for measuring the power factor of the motor 1.
Further, the following data are stored in the database server 10: intermittent pumping and stopping allowable value P, daily production fluid V of oil wellDaily liquidVolume water content n of crude oilwDensity of water ρwDensity rho of water-free crude oiloThe inner diameter of the sleeve is phiSleeveThe outer diameter of the oil pipe is phiOilDiameter D of oil well pumppStroke S, sprint nPunching machineLambda, loss of stroke, Q, loss of pumpLeakage netPump suction inlet gas-liquid ratio R, pump clearance volume coefficient K, oil-well pumpSubmergence pressure PsPressure P at oil pump outletdA polytropic process exponent n.
The above data can be measured, assigned values or obtained by looking up tables, and are all basic data commonly used by those skilled in the art in work, and therefore, all the data can be used as known data.
Third embodiment
On the basis of pumping control system between oil field beam-pumping unit intelligence, the utility model discloses still protected an utilize oil field beam-pumping unit intelligence to take out control system's control method between, specifically included following step:
step S1, the upper computer 11 calls the data stored in the database server 10, and calculates the initial value of the thinning-out system according to the called data;
step S2, sending the intermittent pumping system initial value to a well site RTU12 by the upper computer 11, and calling the intermittent pumping system initial value from the well site RTU12 by the controller 8;
step S3, the controller 8 draws a polish rod indicator diagram according to the load displacement data transmitted by the load displacement sensor 7 and reflects the polish rod indicator diagram on the display 9;
step S4, the controller 8 draws a motor power diagram according to the data transmitted by the rotating speed sensor 4, the electrical parameter sensor 5 and the crank position sensor 6, and reflects the diagram on the display 9;
step S5, correcting the electromechanical indicator diagram according to the polish rod indicator diagram;
step S6, self-defining the standard reaching rate and the target value of the electric diagram, and if the standard reaching rate of the electric diagram is within the threshold range of the target value, indicating that the intermittent pumping system is reasonable, and the beam pumping unit 2 can take the initial value of the intermittent pumping system as an intermittent pumping period to perform intermittent pumping oil extraction; and if the standard reaching rate of the electric diagram is outside the threshold range of the target value, indicating that the intermittent pumping system is unreasonable, adjusting the initial value of the intermittent pumping system, and continuously repeating the second step to the sixth step until the standard reaching rate of the electric diagram finally reaches the target value.
The difference between the present embodiment and the conventional intermittent pumping control method is that after the polished rod indicator diagram and the motor electrical diagram are drawn, they are not used directly, but the polished rod indicator diagram is used to correct (or may be corrected) the motor electrical diagram, and the principle of the correction is that if the electrical diagram standard reaching rate is within the threshold range of the target value, it indicates that the intermittent pumping system is reasonable, and the beam-pumping unit 2 can take the initial value of the intermittent pumping system as the intermittent pumping period to perform intermittent pumping; and if the standard reaching rate of the electric diagram is outside the threshold range of the target value, indicating that the intermittent pumping system is unreasonable, adjusting the initial value of the intermittent pumping system, and continuously repeating the second step to the sixth step until the standard reaching rate of the electric diagram finally reaches the target value.
The reason why the photoelectric indicator diagram is corrected by the polished rod indicator diagram is that the numerical value of the polished rod indicator diagram is a theoretical value, and the obtained indicator diagram is also a diagram in an ideal state, so that the polished rod indicator diagram can be used as a standard diagram, and the electric diagram has certain error due to the numerical value measured by the load displacement sensor 7, if the error is corrected, the initial value of the intermittent pumping system obtained after correction is a reasonable numerical value, and further, the pumping performance of the beam pumping unit can be fully exerted after intermittent pumping.
Fourth embodiment
The utility model discloses still protected an utilize oil field beam-pumping unit intelligence to take out control system's control method within a definite time, specifically included following step:
step S1, the upper computer 11 retrieves the data stored in the database server 10, calculates an initial value of the intermittent pumping system according to the retrieved data, the initial value of the intermittent pumping system includes an initial value of the shut-in time t and an initial value of the open-in time t', and jointly obtains the initial value according to the following formula:
wherein the allowable value of P-interval pumping stop well is 0.5 × 105Pa and VDaily liquidOil well daily fluid production, m3D; t is the well stopping time, h; n isw-volumetric water content of crude oil; rhowDensity of water, kg/m3；ρoDensity of crude oil without water, kg/m3；фSleeve-the casing internal diameter, m; phi shapeOil-tubing outside diameter, m;
in the formula: dp-the oil well pump diameter, m; s-stroke, m; n isPunching machineNumber of strokes, min-1(ii) a λ -stroke loss, m; qLeakage netOil-well pump leakage, m3/d；ηCharging device-pump fill factor;
in the formula: r-gas-liquid ratio of pump suction inlet, m3/m3(ii) a K-pump clearance volume coefficient; ps-the sinking pressure of the pump, Pa; pd-pump outlet pressure, Pa; n is the polytropic process exponent, n ≈ 1.1.
Step S2, sending the intermittent pumping system initial value to a well site RTU12 by the upper computer 11, and calling the intermittent pumping system initial value from the well site RTU12 by the controller 8;
step S3, the controller 8 draws a polished rod indicator diagram according to the load displacement data transmitted by the load displacement sensor 7, and reflects the polished rod indicator diagram on the display 9, which specifically includes:
s301, the load displacement sensor 7 collects the positions and loads of different polished rods 3 in the oil pumping process and sends the positions and loads to the controller 8;
s302, the controller 8 draws the polished rod position SθAnd polish rod load NθThe relationship diagram of (a) is reflected on the display 9, i.e., the polished rod indicator diagram.
In step S4, the controller 8 draws a motor diagram according to the data transmitted by the rotation speed sensor 4, the electrical parameter sensor 5, and the crank position sensor 6, and reflects the diagram on the display 9, which specifically includes:
s401, collecting different crank positions theta by the crank position sensor 6, and collecting motor rotating speed distribution omega of different crank positions theta by the rotating speed sensor 4θThe electric parameter sensor 5 collects the current distribution I of the motor 1 at different crank positions thetaθVoltage distribution U of motor 1 at different crank positions θθAnd a power factor distribution cos θ of the motor 1 at different crank positions θ;
s402, calculating electricity according to the following formulaMachine torque distribution Tθ：
In the formula: u shapeθ-voltage distribution of the motor 1 at different crank positions θ; i isθ-current distribution of the motor 1 at different crank positions θ; cos θ — power factor distribution of the motor 1 at different crank positions θ; omegaθ-motor speed distribution for different crank positions θ;
s403, checking a polished rod position factor and torque factor table of the pumping unit in the use specification of the beam pumping unit 2, and recording the polished rod position factor gamma of the pumping unitθEstablishing different crank position theta and polish rod position S according to formula fiveθEquation five is as follows:
Sθ＝S×γθformula five
In the formula: sθ-polished rod position, m; s-stroke, m; gamma rayθ-a polished rod position factor;
s404, establishing motor torque distribution TθAnd the position S of the polished rodθDrawing the position of the polished rod according to the corresponding relation
SθTorque T of motorθThe relationship diagram of (a), i.e., the motor power diagram, is reflected on the display 9.
Step S5, the electro-mechanical diagram of the positive motor is revised according to the polish rod indicator diagram, which specifically comprises the following steps:
looking up the display 9, observing the relative positions of the optical rod indicator diagram and the motor electrical diagram in the display 9, referring to fig. 2 and 3, adjusting the stroke S of the motor electrical diagram by taking the optical rod indicator diagram as a standard so that the boundary points of the optical rod indicator diagram and the motor electrical diagram are superposed, then removing the load displacement sensor 7, and finishing the correction of the motor electrical diagram.
Step S6, self-defining the standard reaching rate and the target value of the electric diagram, and if the standard reaching rate of the electric diagram is within the threshold range of the target value, indicating that the intermittent pumping system is reasonable, and the beam pumping unit 2 can take the initial value of the intermittent pumping system as an intermittent pumping period to perform intermittent pumping oil extraction; if the standard-reaching rate of the electric diagram is outside the threshold range of the target value, it indicates that the intermittent pumping system is unreasonable, the initial value of the intermittent pumping system is adjusted, and the second step to the sixth step are continuously repeated until the standard-reaching rate of the electric diagram finally reaches the target value, as shown in fig. 4, the method specifically comprises the following steps:
s601, defining the standard reaching rate of the electric diagrams as the proportion of the number of the electric diagrams with the electric diagram fullness degree of more than or equal to 70% in the latest pumping period to all the electric diagrams in the pumping period, wherein the electric diagram fullness degree refers to the proportion of the electric diagrams and the polished rod indicator diagrams in the same pumping period;
s602, taking the electric diagram standard-reaching rate of more than or equal to 70% in the latest interval pumping period as a target value, and if the electric diagram standard-reaching rate is within the threshold range of the target value, indicating that the interval pumping system is reasonable, wherein the beam pumping unit 2 can take the initial value of the interval pumping system as the interval pumping period to perform interval pumping oil extraction;
s603, if the standard reaching rate of the electric diagram is outside the threshold range of the target value, the intermittent pumping system is unreasonable, the initial value of the intermittent pumping system is adjusted in a +/-5% floating range, and the steps two to six are repeated continuously to enable the standard reaching rate of the electric diagram to float in the +/-5% range until the standard reaching rate of the electric diagram finally reaches the target value.
It should be noted that, in step 4, the polish rod indicator diagram and the electrical diagram are both SθAs the abscissa, the polished rod displacement at different crank positions theta is collected, except that S of the polished rod indicator diagramθIs calculated by formula five, and S of the electric diagramθIs detected by the load displacement sensor 7, and the biggest difference between the two is that the polished rod position factor in the formula five is obtained by table look-up, and the S obtained by calculationθThe numerical value is a theoretical value, namely, the numerical value in an ideal state, and the position information collected by the load displacement sensor 7 inevitably has a certain error due to the problems of the installation position and the detection precision, and the error can not be directly eliminated physically, therefore, the utility model discloses utilize the polished rod indicator diagram to correct the positive indicator diagram, while correcting the positive indicator diagram, also adjust the initial value of the intermittent pumping system, namely, the well shut-in time t and the well opening time t', concretely, how to correct the positive indicator diagram will be concretely illustrated in the following and how to obtain the initial value of the reasonable intermittent pumping systemThe detailed procedure is as follows:
assuming that an electric diagram is drawn every 10min and 100 electric diagrams are drawn in the latest (last) interval pumping period, wherein the full degree of the electric diagram is more than or equal to 70% and 80 electric diagrams are drawn in the same position at the same time, and the full degree of the electric diagram refers to the area ratio of the electric diagram and the polished rod indicator diagram, the standard reaching rate of the electric diagram is 80/100 × 100% to 80%, obviously, the standard reaching rate of the 90% electric diagram is more than or equal to 80% and more than or equal to 70%, namely the standard reaching rate of the electric diagram is in the threshold range of the target value, which indicates that the interval pumping system is reasonable, and the beam pumping unit 2 can take the initial value of the interval pumping system as the interval pumping period to perform interval pumping oil;
assuming that an electric diagram is drawn every 10min, and 100 electric diagrams are drawn in the last (last) interval pumping cycle, wherein 65 electric diagrams are provided with the full degree of more than or equal to 70%, and the full degree of the electric diagrams refers to the area ratio of the electric diagrams and the polished rod indicator diagrams which are simultaneously drawn under the same position at the same time, the standard reaching rate of the electric diagrams is 65/100 × 100% to 65%, obviously, the standard reaching rate of the electric diagrams is less than 70%, namely the standard reaching rate of the electric diagrams is out of the threshold range of a target value, which indicates that the interval pumping system is unreasonable, at the moment, the well stopping time t and the well opening time t ' are adjusted to be optimized step by step according to the range of +/-5%, as shown in fig. 4, the well stopping time t is adjusted to be t × 1.05.05, the well opening time t ' is adjusted to be t ' × 0.95.95, the second step to the sixth step are repeated continuously, and the interval pumping system finally reaches the self-learning target value requirement.
To sum up, the utility model provides a control method is taken out to this kind of oil field beam-pumping unit intelligence within a definite time, based on to beam-pumping unit crank position, motor speed and electrical parameter monitoring analysis, through electric work diagram inversion polished rod indicator diagram and controller integrated analysis, calculate and to guarantee the system of taking out between of low liquid volume oil well high-efficient operation, export for the motor by the controller and carry out, and then realized taking out control between beam-pumping unit intelligence, realized the high-efficient operation of beam-pumping unit, also solved the problem that output descends and mechanical mining system efficiency is low partially simultaneously.
It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.
Claims (3)
1. The utility model provides a control system is taken out between oil field beam-pumping unit intelligence, includes database server (10), host computer (11), well site RTU (12) and controller (8) that electricity is connected in proper order, display (9) and motor (1) are connected to controller (8) electricity, motor (1) are connected and are driven beam-pumping unit (2), polished rod (3) are connected to the horse head of beam-pumping unit (2), its characterized in that: a rotating speed sensor (4) and an electrical parameter sensor (5) are installed on the motor (1), a crank position sensor (6) is installed on a crank of the beam pumping unit (2), and a load displacement sensor (7) is installed on the polished rod (3);
the rotating speed sensor (4), the electrical parameter sensor (5), the crank position sensor (6) and the load displacement sensor (7) are respectively connected with the controller (8).
2. The intelligent intermittent pumping control system of the oil field beam pumping unit according to claim 1, characterized in that: the electrical parameter sensor (5) comprises a voltage sensor for measuring the voltage of the motor (1), a current sensor for measuring the current of the motor (1) and a power factor sensor for measuring the power factor of the motor (1).
3. The intelligent intermittent pumping control system of the oil field beam pumping unit according to claim 1, characterized in that: the database server (10) stores the following data: intermittent pumping and stopping allowable value P, daily production fluid V of oil wellDaily liquidVolume water content n of crude oilwDensity of water ρwDensity rho of water-free crude oiloThe inner diameter of the sleeve is phiSleeveThe outer diameter of the oil pipe is phiOilDiameter D of oil well pumppStroke S, sprint nPunching machineLambda, loss of stroke, Q, loss of pumpLeakage netPump inlet gas-liquid ratio R, pump clearance volume coefficient K, sinking pressure P of oil-well pumpsPressure P at oil pump outletdA polytropic process exponent n.
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| CN201921614972.4U CN211201909U (en) | 2019-09-26 | 2019-09-26 | Intelligent intermittent pumping control system of oil field beam pumping unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685650A (en) * | 2019-09-26 | 2020-01-14 | 中国石油天然气股份有限公司 | Intelligent intermittent pumping control system and method for oil field beam pumping unit |
| CN117703322A (en) * | 2024-02-05 | 2024-03-15 | 希望森兰科技股份有限公司 | Beam-pumping unit energy-saving swing control method and intelligent control system of Internet of things |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685650A (en) * | 2019-09-26 | 2020-01-14 | 中国石油天然气股份有限公司 | Intelligent intermittent pumping control system and method for oil field beam pumping unit |
| CN117703322A (en) * | 2024-02-05 | 2024-03-15 | 希望森兰科技股份有限公司 | Beam-pumping unit energy-saving swing control method and intelligent control system of Internet of things |
| CN117703322B (en) * | 2024-02-05 | 2024-04-12 | 希望森兰科技股份有限公司 | Beam-pumping unit energy-saving swing control method and intelligent control system of Internet of things |
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