CN1594830A - Intelligent oil recovery control system and control method thereof - Google Patents

Abstract

An intelligent oil exploitation control system and a control method thereof are disclosed. A load sensor, a current sensor and a voltage sensor are respectively connected to three input ports of the analog module of a programmable controller by circuitries; a velocity displacement sensor is connected to the input port of the high speed counter of the programmable controller by circuitry; a GPRS, a man-machine interface and a frequency converter are connected to the communication ports of the programmable controller by communication cables, the frequency converter controls the rotate speed of the execute motor by power line; the control mode finds out the liquid producing amount and the maximum value of ground efficiency by acquiring necessary data and calculation, and adjusts the running state of the oil exploitation equipment based on conditions; the faults such as rod broken, pump take off and pump leakage can be judged based on acquired data to display the balancing degree for the weight. The invention can find a best oil exploitation parameter based on the liquid producing amount and ground efficiency to achieve best oil exploitation effect; the well fault can be judged in time to provide weight condition, so the oil exploitation efficiency is made to maximum and the energy saving effect is best.

Description

Intelligent oil extraction control system and control method thereof

Technical field: the present invention relates to oil extraction control system, particularly surface efficiency and production fluid amount are taken into account and the intelligent oil extraction control system and the control method thereof of down-hole fault judgement.

Background technology: the energy-saving control system of rod-pumped well has obtained in the oil field widely using at present, and a part is tested back adjusting strokes per minute by the people or taken out, and arrives energy-saving efficiency; A part is to reach energy-saving effect by strokes per minute is automatically regulated in the measurement of input current.Relevant technology discloses on " oil instrument " 1997.011 (006) .-15-17, " micro computer and application " 1989.000 (002) .-36-38 " petroleum industry technical supervision " .2002.018 (008) .-13-15, but does not all relate to the running status of adjusting oil production equipment according to indicator card and surface efficiency automatically; Judge disconnected bar, take off pump and the degree of balance pump leakage failure and counterweight indication by data acquisition the running status of load, electric current, voltage and motor.

Summary of the invention: purpose of the present invention is exactly to seek the petroleum production parameter an of the best on production fluid amount and surface efficiency, to reach the effect of preferably recovering the oil; Judge the down-hole fault in time, the counterweight situation is provided, make the most effective of oil recovery, energy-saving effect is best.

Concrete technical scheme is as follows: a kind of intelligent oil extraction control system is characterized in that: load sensor, current sensor and voltage sensor connect three input ports of the analog module of programmable logic controller respectively by circuit 1,2,3; The speed displacement sensor connects the input port of the high-speed counter of programmable logic controller by circuit 4; Packet wireless business module GPRS, man-machine interface and frequency converter connect with the communication interface 5,6,7 of programmable logic controller by communication cable, and frequency converter is by the rotating speed of power line 8 control actuating motors.

The control method of intelligent oil extraction control system may further comprise the steps:

(1) sets oil pumper Specified strokes per minute operation 72 hours;

(2) the volume strokes per minute is divided into 8 parts, from The strokes per minute point brings into operation to specified strokes per minute point, counts 8 points, gathers a stroke polished rod institute work (indicator card area) and pairing input work respectively;

(3) in the step (2), 8 measured results of point multiply by pairing strokes per minute respectively and draw minute production fluid equivalent and minute input work;

(4) from step (3), find out minute maximum value of production fluid equivalent and corresponding strokes per minute;

(5) the production fluid equivalent in the step (3) draws the surface efficiency of each point divided by pairing input work;

(6) from step (5), find out the maximum value of surface efficiency and corresponding strokes per minute;

(7) put clock 1 hour;

(8) detect whether (surface efficiency peak, production fluid equivalent peak) result is set is by operation is set;

(9) step (8) result denys, the strokes per minute of 2 intermediate point operation in (4), the step (6) set by step;

(10) detect 1 hour running time, the result does not return step (9);

(11) step (10) result is, stores behind up, the descending average current value of the polished rod of this point of sampling respectively, the corresponding product of magnitude of voltage, puts clock 120 hours;

(12) gather electric current, the average voltage that this point moves the polished rod uplink and downlink respectively, divided by the value for storage in the step (11), draw fiducial value behind the corresponding product;

(13) in the step (12), fiducial value was less than 5% when polished rod was up, and disconnected bar takes off the pump stopping alarm, otherwise returned step (12);

Fiducial value was less than 5% when (14) polished rod was descending in the step (12), and pump leaks stopping alarm, otherwise returns step (12);

(15) product in the step (12) is with the time of upper and lower operation, and the two-value that draws is compared, and ratio is the indication of counterweigh degree;

(16) detect clock, the result does not return step (12), and the result then returns step (2).

Compare with prior art, the present invention adjusts the running status of oil production equipment automatically according to indicator card and surface efficiency, seeks the petroleum production parameter an of the best on production fluid amount and surface efficiency, to reach the effect of preferably recovering the oil; Judge disconnected bar, take off pump and the degree of balance pump leakage failure and counterweight indication by data acquisition the running status of load sensor, current sensor, voltage sensor and motor, judge the down-hole fault in time, the counterweight situation is provided, make the most effective of oil recovery, energy-saving effect is best.

Description of drawings: the present invention is described in detail below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram of intelligent oil extraction control system.

Fig. 2 is the structural representation of intelligent oil extraction control system.

Fig. 3 is the control flow chart of intelligent oil extraction control system.

The specific embodiment:

As shown in Figure 1, by man-machine interface oil production equipment (oil pumper) is pressed

Specified strokes per minute is provided with operation, and by maximum, the minimum load of the collection of the load sensor in control system polished rod uplink and downlink, electric current, voltage sensor are gathered pairing input current, magnitude of voltage, send into analog module; Rotating speed displacement transducer collection position and displacement signal are sent into programmable logic controller, control the output of the frequency converter of executive system by calculation process afterwards and adjust equipment running status, utilize network communication mode GPRS to realize machine multidigit control.

As shown in Figure 2, a kind of intelligent oil extraction control system, load sensor, current sensor and voltage sensor connect three input ports of the analog module of programmable logic controller respectively by circuit 1,2,3; The speed displacement sensor connects the input port of the high-speed counter of programmable logic controller by circuit 4; Packet wireless business module GPRS, man-machine interface and frequency converter connect with the communication interface 5,6,7 of programmable logic controller by communication cable, and frequency converter is by the rotating speed of power line 8 control actuating motors.

The model of man-machine interface is 6AV3607-1NH00-OAXO, the model of programmable logic controller is 6ES7216-2BD21-OXBO, the model of voltage sensor is GAV-052, the model of current sensor is GAA-054, the model of analog module is 6ES7231-7PD21-OXAO, and the model of rotating speed displacement transducer is E6A2-CS5C, and the model of frequency converter is ATV58FHU64N4, the model of packet wireless business module GPRS is HD7112, and oil pumper is the commercial product of disposable type.

As shown in Figure 3, the control method of intelligent oil extraction control system may further comprise the steps:

(1) sets oil pumper Specified strokes per minute operation 72 hours;

(2) the volume strokes per minute is divided into 8 parts, from

The strokes per minute point brings into operation to specified strokes per minute point, counts 8 points, gathers a stroke polished rod institute work (indicator card area) and pairing input work respectively;

(3) in the step (2), 8 measured results of point multiply by pairing strokes per minute respectively and draw minute production fluid equivalent and minute input work;

(4) from step (3), find out minute maximum value of production fluid equivalent and corresponding strokes per minute;

(5) the production fluid equivalent in the step (3) draws the surface efficiency of each point divided by pairing input work;

(6) from step (5), find out the maximum value of surface efficiency and corresponding strokes per minute;

(7) put clock 1 hour;

(8) detect whether (surface efficiency peak, production fluid equivalent peak) result is set is by operation is set;

(9) step (8) result denys, the strokes per minute of 2 intermediate point operation in (4), the step (6) set by step;

(10) detect 1 hour running time, the result does not return step (9);

(11) step (10) result is, stores behind up, the descending average current value of the polished rod of this point of sampling respectively, the corresponding product of magnitude of voltage, puts clock 120 hours;

(12) gather electric current, the average voltage that this point moves the polished rod uplink and downlink respectively, divided by the value for storage in the step (11), draw fiducial value behind the corresponding product;

(13) in the step (12), fiducial value was less than 5% when polished rod was up, and disconnected bar takes off the pump stopping alarm, otherwise returned step (12);

Fiducial value was less than 5% when (14) polished rod was descending in the step (12), and pump leaks stopping alarm, otherwise returns step (12);

(15) product in the step (12) is with the time of upper and lower operation, and the two-value that draws is compared, and ratio is the indication of counterweigh degree;

(16) detect clock, the result does not return step (12), and the result then returns step (2).

The collection of data:

The data acquisition of load, electric current and voltage is an analog module of sending into programmable controller by load, electric current and voltage sensor, and the signal of speed displacement sensor is directly sent into programmable logic controller.

The upper and lower stroke of polished rod is divided into 50 equal portions, load, electric current and voltage are sampled.

The processing of data:

When polished rod is up to the load F of each point _nAverage after adding up, and multiply by stroke S, draw polished rod institute's work of up time, i.e. (F ₁+ F ₂+ ... + F ₅₀) S/50

When polished rod is descending to the load F of each point _nAverage after adding up, and multiply by stroke S and draw the negative work that polished rod is done when descending, promptly

-(F ₁′+F ₂′+…+F ₅₀′)s/50

Multiply by strokes per minute n after the addition again, draw a minute production fluid equivalent, promptly

(F ₁+F ₂+……+F ₅₀-F ₁′-F ₂′-…-F ₅₀′))nS/50

When polished rod is up to the electric current I of each point _n, voltage U _nAdd up and average

I＝(I ₁+I ₂+……+I ₅₀)/50 U＝(U ₁+U ₂+……+U ₅₀)/50

When polished rod is descending to the electric current I of each point _n', voltage U _n' add up and average

I′＝(I ₁′+I ₂′+…+I ₅₀′)/50 U′＝(U ₁′+U ₂′+…+U ₅₀′)/50

Power was when polished rod was up Power was when polished rod was descending Input work when polished rod is up is (line time on the t polished rod) input work when polished rod is descending is for being Multiply by strokes per minute n again after (t ' polished rod downgoing time) addition and draw a minute input work

$(\sqrt{3}\mathrm{IUt}\cos \mathrm{\φ}+\sqrt{3}{I}^{\′}{U}^{\′}{t}^{\′}\cos \mathrm{\φ}).n$

This system of Centralized Monitoring manages and monitors oil production equipment on the net by packet wireless business GPRS.

Claims (2)

1, a kind of intelligent oil extraction control system is characterized in that: load sensor, current sensor and voltage sensor connect three input ports of the analog module of programmable logic controller respectively by circuit (1), (2), (3); The speed displacement sensor connects the input port of the high-speed counter of programmable logic controller by circuit (4); Packet wireless business module GPRS, man-machine interface and frequency converter connect with communication interface (5), (6), (7) of programmable logic controller by communication cable, and frequency converter is by the rotating speed of power line (8) control actuating motor.

2, a kind of control method of intelligent oil extraction control system is characterized in that: this method may further comprise the steps:

(1) sets oil pumper Specified strokes per minute operation 72 hours;

(2) the volume strokes per minute is divided into 8 parts, from The strokes per minute point brings into operation to specified strokes per minute point, counts 8 points, gathers stroke polished rod institute's work and pairing input work respectively;

(3) in the step (2), 8 measured results of point multiply by pairing strokes per minute respectively and draw minute production fluid equivalent and minute input work;

(4) from step (3), find out minute maximum value of production fluid equivalent and corresponding strokes per minute;

(5) the production fluid equivalent in the step (3) draws the surface efficiency of each point divided by pairing input work;

(6) from step (5), find out the maximum value of surface efficiency and corresponding strokes per minute;

(7) put clock 1 hour;

(8) detect whether the surface efficiency peak is set, production fluid equivalent peak result is by operation is set;

(9) step (8) result denys, the strokes per minute of 2 intermediate point operation in (4), the step (6) set by step;

(10) detect 1 hour running time, the result does not return step (9);

(11) step (10) result is, stores behind up, the descending average current value of the polished rod of this point of sampling respectively, the corresponding product of magnitude of voltage, puts clock 120 hours;

(12) gather electric current, the average voltage that this point moves the polished rod uplink and downlink respectively, divided by the value for storage in the step (11), draw fiducial value behind the corresponding product;

(13) in the step (12), fiducial value was less than 5% when polished rod was up, and disconnected bar takes off the pump stopping alarm, otherwise returned step (12);

Fiducial value was less than 5% when (14) polished rod was descending in the step (12), and pump leaks stopping alarm, otherwise returns step (12);

(15) product in the step (12) is with the time of upper and lower operation, and the two-value that draws is compared, and ratio is the indication of counterweigh degree;

(16) detect clock, the result does not return step (12), and the result then returns step (2).

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