CN113586037B - Method and device for diagnosing working condition of oil pumping well - Google Patents
Method and device for diagnosing working condition of oil pumping well Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000035772 mutation Effects 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 15
- 238000003745 diagnosis Methods 0.000 claims description 14
- 230000015654 memory Effects 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000003129 oil well Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 239000001993 wax Substances 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 4
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- 230000005484 gravity Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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Abstract
The invention relates to the technical field of mechanical oil extraction, and provides a method and a device for diagnosing working conditions of a pumping unit well, wherein the method comprises the following steps: acquiring an electrical parameter curve to be analyzed in the stroke cycle of the rod-pumped well; calculating to obtain a differential curve to be analyzed according to the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the oil pumping well; and diagnosing the working condition of the oil pumping well according to the differential curve to be analyzed. The working condition of the oil pumping well can be accurately analyzed under the condition that the load sensor is not used, a guarantee is provided for real-time intelligent adjustment of the operation parameters and reduction of the energy consumption of the oil pumping well, and further digital management of the oil well with low cost and high efficiency is realized.
Description
Technical Field
The invention relates to the technical field of mechanical oil extraction, in particular to a method and a device for diagnosing working conditions of an oil pumping well.
Background
The existing oil pumping well indicator diagram is obtained through a load sensor, has the problems of high cost, low popularization rate, easy drifting and distortion of data and the like, and restricts the development of the construction and digital management of the Internet of things in the oil field.
The electrical parameter is the most basic operation parameter of the oil pumping well, has the advantages of high popularization rate, low acquisition cost, stable data and the like, and can be used for diagnosing the working condition of the oil pumping well, avoiding using a load sensor and realizing low-cost and high-efficiency digital management of the oil well. However, there are several problems in directly diagnosing working conditions by replacing the indicator diagram with electrical parameters: the energy transmission links from the ground to the underground are more, the influence factors of the electric parameters are more, and compared with the indicator diagram, the characteristics of the electric parameter curve are more complex. At present, no effective and accurate document for diagnosing working conditions by directly applying an electrical parameter curve is known.
Disclosure of Invention
The method for directly determining the working condition of the rod-pumped well according to the electric parameter curve of the rod-pumped well in the prior art has the defect of low working condition diagnosis precision.
A first aspect herein provides a method of diagnosing a pump well condition, comprising:
acquiring an electrical parameter curve to be analyzed in the stroke cycle of the rod-pumped well;
calculating to obtain a differential curve to be analyzed according to the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the oil pumping well;
and diagnosing the working condition of the oil pumping well according to the differential curve to be analyzed.
A second aspect herein provides an oil pumping well condition diagnostic device, comprising:
the acquisition module is used for acquiring an electrical parameter curve to be analyzed in the stroke cycle of the oil pumping well;
the calculation module is used for calculating and obtaining a differential curve to be analyzed according to the electric parameter curve to be analyzed and the electric parameter curve of the normal working condition in the stroke cycle of the oil pumping well;
and the diagnosis module is used for diagnosing the working condition of the oil pumping well according to the differential curve to be analyzed.
A third aspect herein provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of diagnosing a pump well condition according to the first aspect when executing the computer program.
A fourth aspect herein provides a computer readable storage medium storing a computer program for executing the method for diagnosing a working condition of a rod-pumped well according to the first aspect when executed by a processor.
The method comprises the steps of obtaining an electrical parameter curve to be analyzed in the stroke cycle of the oil pumping well; calculating to obtain a differential curve to be analyzed according to the electric parameter curve to be analyzed and the electric parameter curve of the normal working condition in the stroke cycle of the oil pumping well; according to the differential curve to be analyzed, the working condition of the oil pumping well is diagnosed, the working condition of the oil pumping well can be accurately analyzed under the condition that a load sensor is not used, a guarantee is provided for real-time intelligent adjustment of operation parameters and reduction of energy consumption of the oil pumping well, and further digital management of the oil well with low cost and high efficiency is realized.
The foregoing and other objects, features and advantages will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments herein or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments herein and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 illustrates a first flow chart of a method of diagnosing pump well conditions of embodiments herein;
FIG. 2 illustrates a flow chart for acquiring electrical parameter profiles over a stroke cycle of embodiments herein;
FIG. 3 illustrates a flow chart for diagnosing pump well conditions based on a differential curve according to embodiments herein;
FIG. 4 illustrates a second flow chart of a method of diagnosing pump well conditions of embodiments herein;
FIG. 5 illustrates a flow chart of a method of diagnosing pump well conditions in accordance with certain embodiments herein;
FIG. 6 illustrates a graph of electrical power at a rod-off condition for a rod of a rod-pumped well in accordance with embodiments herein;
FIG. 7 illustrates a three-phase electrical open-phase condition electric power profile for a rod-pumped well of the embodiments herein;
FIG. 8 illustrates a graph of electrical power for a pump well belt power down condition in accordance with embodiments herein;
FIGS. 9A and 9B are graphs of electrical power and differences, respectively, for conditions of insufficient fluid or gas supply to a rod-pumped well according to embodiments herein;
FIGS. 10A and 10B are graphs of electrical power and differential for a pump well fixed valve leak condition according to embodiments herein, respectively;
FIGS. 11A and 11B are graphs of electrical power and differential for a lost motion valve of a pumping unit according to embodiments herein, respectively;
12A and 12B show graphs of electrical power and differences, respectively, of a paraffin formation condition of a rod-pumped well in accordance with embodiments herein;
FIGS. 13A and 13B are diagrams of an indicator diagram and an electric power curve, respectively, illustrating normal operation of a rod-pumped well according to embodiments herein;
FIG. 14 shows a first block diagram of a rod-pumped well condition diagnostic device of an embodiment herein;
FIG. 15 illustrates a second block diagram of a rod-pumped well condition diagnostic device of an embodiment herein;
FIG. 16 illustrates a third block diagram of a rod-pumped well condition diagnostic device of an embodiment herein;
FIG. 17 shows a fourth block diagram of a rod-pumped well condition diagnostic device of an embodiment herein;
FIG. 18 illustrates a block diagram of a computer device of embodiments herein;
FIGS. 19A and 19B show electrical power curves and differential graphs of a first embodiment herein;
fig. 20 shows a graph of electrical power for a second embodiment herein.
Detailed Description
The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the disclosure. All other embodiments, based on the embodiments herein, which a person of ordinary skill in the art would obtain without undue burden, are within the scope of protection herein.
As shown in fig. 1, fig. 1 illustrates a first flow chart of a method of diagnosing pump-well conditions of embodiments herein. The method can solve the defect of low working condition diagnosis precision in the method for directly determining the working condition of the oil pumping well according to the electric parameter curve of the oil pumping well in the prior art. Specifically, the method for diagnosing the working condition of the oil pumping well comprises the following steps:
step 110, obtaining an electrical parameter curve to be analyzed in the stroke cycle of the rod-pumped well.
In detail, the electrical parameter curves to be analyzed include a current curve and an active power curve (hereinafter referred to as a power curve). The stroke cycle refers to an up-stroke, which refers to the process of the rod-pumped well moving from the lowest point to the highest point, and a down-stroke, which refers to the process of the rod-pumped well moving from the highest point to the lowest point.
In some embodiments, the electrical parameter profile to be analyzed over the pump well stroke cycle may be obtained directly, and the start and end of the stroke cycle may be confirmed manually or by a sensor. In other embodiments, the electrical parameter curve to be analyzed in the stroke cycle of the rod-pumped well may also be obtained by analysis, as shown in fig. 2, where the analysis process includes:
step 201, an electrical parameter curve of the pumping well is collected. In the concrete implementation, the electric parameters of the oil pumping well can be read in real time by connecting the acquisition equipment with the Internet of things of the oil field, and an electric parameter curve is drawn according to the read electric parameters.
Step 202, identifying top dead center and bottom dead center in the collected electrical parameter curve of the rod-pumped well.
In some embodiments, the top dead center and the bottom dead center of the electrical parameter of the pumping unit well are at intervals and are the positions of the wave troughs in the electrical parameter curve of the pumping unit well, so that when the top dead center and the bottom dead center are specifically identified, the wave troughs of the electrical parameter curve of the pumping unit well are identified first, and then the top dead center and the bottom dead center are determined according to the wave trough points (namely, the wave trough points are the top dead center or the bottom dead center). Taking an active power curve collected by a well-balanced oil pumping well as an example, as shown in fig. 13A and 13B, an active power curve a 'B' C 'section corresponds to an upper stroke in an indicator diagram ABC, wherein a' is a bottom dead center; b 'is the non-smooth point of the upstroke segment, corresponding to the loading being completed, the fixed valve is opened, and C' is the end of the upstroke, reaching top dead center. The segment C 'D' A 'of the active power curve corresponds to the downstroke in the indicator diagram CDA, wherein C' is the top dead center; d' is an uneven point of the downstroke section, and the traveling valve is opened corresponding to the completion of unloading; a' is the end of the downstroke and reaches bottom dead center.
And 203, determining an electrical parameter curve to be analyzed in the stroke cycle of the rod-pumped well according to the top dead center and the bottom dead center identified in the step 202. The electrical parameter curve between two adjacent top dead centers or the electrical parameter curve between two adjacent bottom dead centers (such as A '-A' in FIG. 13B) is the electrical parameter curve to be analyzed in the stroke cycle of the pumping well.
The embodiment can improve the efficiency of acquiring the electrical parameter curve in the stroke cycle.
And 130, calculating to obtain a differential curve to be analyzed according to the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the pumping well.
The normal working condition electrical parameter curve can be determined manually in advance, and the determination mode is not limited in this document. Specifically, step 130 includes: and performing difference processing on the electric parameter curve to be analyzed and the electric parameter curve under the normal working condition, and calculating to obtain a differential curve to be analyzed. In the specific implementation, the difference square, absolute error and the like can be processed on the electric parameter curve to be analyzed and the electric parameter curve under the normal working condition, so as to obtain a differential curve to be analyzed. The specific calculation process of the differential curve is not limited herein.
And step 150, diagnosing the working condition of the pumping well according to the differential curve to be analyzed.
In some embodiments, to increase diagnostic speed, as shown in fig. 3, step 150 includes:
step 301, analyzing the characteristics of the differential curve to be analyzed. In detail, features include, but are not limited to, a particular order, a particular location of a protrusion, a particular location of a depression, a particular location of a sharp corner, and the like. The specific location may be predetermined when the feature database X is built.
Step 302, inquiring the characteristics of the differential curve to be analyzed in a characteristic database X. The characteristic database X is pre-established based on analysis of a large number of differential curve samples, and corresponding relations between differential curve characteristics and working conditions are stored in the characteristic database X, as shown in table one.
List one
And 303, taking the working condition corresponding to the inquired differential curve characteristic as the working condition of the differential curve to be analyzed.
In other embodiments, the feature database X further stores differential feature curves corresponding to the working conditions, and step 150 may be implemented as follows: inquiring a differential curve with the same slope change (namely the same slope or within a certain error range) as the differential curve to be analyzed in a characteristic database X; and taking the working condition corresponding to the inquired differential curve as the working condition of the differential curve to be analyzed.
According to the embodiment, the working condition of the oil pumping well is determined through the differential curve, the influence of balance, different types of oil pumping machine types and motor types can be eliminated, the working condition of the oil pumping well can be accurately analyzed under the condition that a load sensor is avoided, and further digital management of an oil well with low cost and high efficiency is achieved. The characteristic of the differential curve is more obvious and simplified than the characteristic of the original electric power curve, and is convenient for manual or machine learning and identification.
For convenience of description, the electrical parameter curves to be analyzed and the electrical parameter curves under normal working conditions refer to the curves in the same pumping well stroke cycle in the following embodiments unless specifically described.
In one embodiment, as shown in fig. 4, in order to avoid calculating the differential curve under the abrupt condition and improve the diagnosis speed, before calculating the differential curve to be analyzed in the step 130, the method further includes:
and step 120, judging whether the electrical parameter curve to be analyzed accords with the characteristics of the mutation working condition. The abrupt working conditions are such as rod breakage, belt breakage and phase failure, etc., the amplitude change of the electric parameter curve is very obvious, the characteristics are easy to describe, and the characteristics such as larger change of peak value and valley value of the electric parameter curve or obvious deletion of the curve can appear. The characteristics of the mutation working conditions can be predetermined, and the corresponding relation between the characteristics of the mutation working conditions and the mutation working conditions is recorded by a characteristic database Y, as shown in a table II.
Watch II
| Working conditions of mutability | Mutability operating mode characteristics |
| Rod break | Similar to a sine curve |
| Belt break | The power curve being a smooth straight line, but not 0 |
| … | … |
If the judgment result is yes, diagnosing the working condition of the oil pumping well according to the recognized mutation working condition characteristics. Specifically, according to the identified mutation working condition characteristics, diagnosing the working condition of the rod-pumped well comprises: inquiring the identified mutation working condition characteristics in the characteristic database Y, and taking the working condition corresponding to the inquired characteristics as the working condition of the pumping unit well.
If the judging result is negative, diagnosing that the working condition of the pumping well is normal or gradual, and executing the step 130 to calculate the differential curve to be analyzed.
For more clarity of description of the technical solution herein, the following description will describe a specific embodiment, specifically, as shown in fig. 5, the method for diagnosing the working condition of the rod-pumped well includes:
step 501, obtaining an electrical parameter curve to be analyzed in a stroke cycle of a rod-pumped well:
(1) And acquiring an electric parameter curve of the oil pumping well in a mode of connecting the acquisition equipment with the oil field Internet of things.
(2) And identifying the top dead center and the bottom dead center in the collected electric parameter curve of the pumping unit well.
(3) And determining an electrical parameter curve to be analyzed in the stroke cycle of the oil pumping well according to the identified top dead center and the identified bottom dead center.
Step 502, determining whether the electrical parameter curve to be analyzed accords with the characteristics of the mutation working condition, if yes, determining the electrical parameter curve to be analyzed as the mutation working condition (including rod break, belt break, three-phase power failure and the like), executing step 503, if no, diagnosing the working condition of the pumping unit well as the normal or gradual change working condition, and executing step 504.
And step 503, diagnosing the working condition of the pumping unit well according to the identified mutation working condition characteristics.
(1) Inquiring the identified mutation working condition characteristics in a characteristic database Y, wherein the corresponding relation between the mutation working condition characteristics and the mutation working conditions is stored in the characteristic database Y. The abrupt working conditions comprise rod breaking, three-phase power phase failure, belt power failure and the like.
a. The broken rod power curve is shown in fig. 6 (crank angle on the abscissa and power on the ordinate in fig. 6), and the upward stroke suspension point load after the broken rod is the gravity of the rod column above the breaking point, and the downward stroke suspension point load is the gravity of the rod column in the liquid. The characteristic on the power curve is shown as a graph similar to a sine curve (the graph is similar to the sine curve and comprises a peak and a trough), positive power is increased and negative power is reduced in the upstroke, so that the polish rod or the upper rod can be judged to be broken, and the rod can be judged to be broken according to the characteristic of the electric parameter curve. The content corresponding to the record in database X is:
| broken rod | Similar to a sine curve |
b. For the three-phase electric open-phase current curve as shown in fig. 7 (the open-C phase, the abscissa in fig. 7 is crank angle, and the ordinate is current), the characteristic of the current curve is that when the three-phase current curve fluctuates, the two-phase value rises, and one phase falls to 0, but when the three-phase voltage is normal, it can be judged that the three-phase electric open-phase is caused by the single line burning in the distribution box and the fault of the alternating current contactor. And judging the three-phase electric open-phase according to the characteristic of the electric reference curve. The content corresponding to the record in database X is:
| three-phase electric open-phase | The two phases increase in value and one phase decreases to 0 |
c. As for the belt outage power curve, as shown in fig. 8 (crank angle on the abscissa and power on the ordinate in fig. 8), when the belt is blown, the power cannot be sent to other devices, and the power curve is characterized in that when the power curve becomes a smooth straight line, the power value is reduced but is not 0, and the belt is judged to be burned. And judging the belt power failure according to the characteristic of the electric reference curve. The content corresponding to the record in database X is:
| belt outage | The power curve being a smooth straight line, but not 0 |
(2) And taking the working condition corresponding to the searched characteristic as the working condition of the electrical parameter curve to be analyzed.
And step 504, performing difference processing on the electric parameter curve to be analyzed and the electric parameter curve under the normal working condition, and calculating to obtain a differential curve to be analyzed.
Step 505, diagnosing the working condition of the pumping unit well according to the differential curve to be analyzed:
(1) And analyzing the characteristics of the differential curve to be analyzed.
(2) Inquiring the characteristic of the differential curve to be analyzed in a characteristic database X ', wherein the characteristic database X ' is pre-established based on analysis of a large number of differential curve samples, and the corresponding relation between the characteristic of the differential curve and the gradual change working condition under the gradual change working condition is stored in the characteristic database X '. Gradual change working conditions comprise gas influence, insufficient liquid supply, leakage of a fixed valve, leakage of a traveling valve, wax precipitation and the like.
a. The electrical power curve for gas effects or insufficient supply is shown as curve 901 in fig. 9A. For gas effects, the upstroke coincides with the normal operating curve 902, the downstroke exhibits a power loading hysteresis, the downstroke load unloading slows down due to the gas effects, the downstroke initially exhibits a power loading hysteresis, and after load unloading, the power begins to increase dramatically, corresponding to the differential curve shown in fig. 9B characterized by: depression at point a. For insufficient fluid supply, the upstroke coincides with the normal condition curve 902, and is affected by insufficient fluid supply, because the down-stroke suspension point load cannot be immediately unloaded, the suspension point load counteracts the increase in torque of the balance block to the crankshaft by the torque of the crankshaft at this time, so that the down-stroke initially shows a power loading lag, when the plunger encounters the fluid level, the suspension point load rapidly decreases, the torque of the balance block to the crankshaft is insufficient to counteract the torque of the crankshaft, and the power rapidly increases, corresponding to the differential curve is characterized by: depression at point a.
The differential curve features shown in fig. 9B may be used to identify operating conditions. The content corresponding to the record in the database is:
| gas influencing or insufficient supply of liquid | Depression at the point a of downstroke |
Because the characteristics of the gas influence and the liquid supply shortage difference curve are similar, the specific working conditions can be determined by combining manual judgment.
b. As shown in fig. 10A, the electric power curve of the fixed valve leakage is shown as curve 1001, the normal working condition curve is 1002, and since the fixed valve leakage causes the traveling valve to open and close in advance, the latter half of the downstroke is loaded in advance, and when the horsehead reaches the bottom dead center, the suspension load is already loaded for a part, so that the power is higher than that under the normal working condition immediately after the upstroke, and the corresponding difference curve 10B shows that the point a bulge exists. At the beginning of the downstroke, the suspension point load is unloaded slowly due to the loss of the fixed valve, and the torque of the crankshaft by the suspension point load counteracts the increase of the torque of the crankshaft by the balance weight, so that the power is smaller than that under the normal working condition, and the corresponding difference curve graph 10B shows that the B point is sunken. The latter half of the downstroke traveling valve closes in advance, resulting in the point of suspension loading ahead of time, the point of suspension loading counteracting the torque of the crankshaft by a portion of the counterweight to the crankshaft, so the power is less than that under normal operating conditions, corresponding to the difference plot 10B being represented by the presence of a point C recess. The differential curve features shown in fig. 10B may be used to identify operating conditions. The content corresponding to the record in the database is:
c. the electric power curve of the lost motion valve is shown as a curve 1101 in fig. 11A, the normal working condition curve is 1102, the first half stroke of the upstroke, the suspension point load cannot rise to the maximum value in time due to the upward jacking action of the liquid lost below the plunger, so that the load is slow, the power curve is delayed from the normal working condition, the suspension point load is unloaded in advance due to the jacking action of the lost liquid in the corresponding difference curve 11B, the suspension point load is reduced and accelerated from the normal working condition in the second half stroke of the upstroke, the corresponding difference curve 11B is sunken, and when the horsehead reaches the upper dead point, the suspension point load is already unloaded for a part, so that the power is higher than the power under the normal working condition at the beginning of the downstroke, and the corresponding difference curve 11B is bulged at the point C. The differential curve features shown in fig. 11B may be used to identify operating conditions. The content corresponding to the record in the database is:
d. the electric power curve of the wax deposition is shown as a broken line in fig. 12A, the normal power curve is shown as a solid line in fig. 12A, the oil flow resistance is increased due to the wax deposition, the load of the polish rod is increased, the loading is slow, the load of the whole upper stroke is larger than the normal load, the load is immediately reduced due to the obstruction of the wax deposition in the lower stroke, and the load is reduced below the normal load when the serious wax deposition position is reached. The loading section is smaller than the normal power on the power curve, the upper stroke section is larger than the normal power, the bulge appears at the upper stroke A point and the bulge appears at the lower stroke C point on the differential graph 12B, and the working condition can be identified by using the differential curve characteristics shown in FIG. 12B. The content corresponding to the record in the database is:
(3) And taking the working condition corresponding to the inquired characteristic of the differential curve as the working condition of the differential curve to be analyzed.
Based on the same inventive concept, there is also provided herein a pump well condition diagnostic device, as described in the following embodiments. Because the principle of the device for solving the problems is similar to that of the working condition diagnosis method of the oil pumping well, the implementation of the device can be referred to the implementation of the working condition diagnosis method of the oil pumping well, and the repetition is omitted. As shown in fig. 14, the pump well condition diagnosing apparatus includes:
an acquisition module 1410 is configured to acquire an electrical parameter profile to be analyzed over a pumping well stroke cycle.
The calculating module 1420 is configured to calculate a differential curve to be analyzed according to the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the rod-pumped well.
And a diagnosis module 1430 for diagnosing the working condition of the pumping well according to the differential curve to be analyzed.
In one embodiment herein, as shown in fig. 15, the obtaining module 1410 includes:
and the acquisition unit 1411 is used for acquiring an electrical parameter curve of the oil pumping well.
And an identification unit 1412, configured to identify top and bottom dead centers in the collected electrical parameter curves of the rod-pumped well.
And the intercepting unit 1413 is used for determining an electric parameter curve to be analyzed in the stroke cycle of the rod-pumped well according to the top dead center and the bottom dead center.
In one embodiment, the calculating module 1420 calculates a differential curve to be analyzed according to the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the rod-pumped well, including:
and carrying out difference processing on the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the oil pumping well, and calculating to obtain a differential curve to be analyzed.
In one embodiment herein, as shown in fig. 16, the diagnostic module 1430 includes:
an identification unit 1431 for identifying characteristics of the differential curve to be analyzed;
the query unit 1432 is configured to query a feature database for features of the differential curve to be analyzed, where the feature database stores a corresponding relationship between the differential curve features and the working conditions;
and the diagnosis unit 1433 is used for taking the working condition corresponding to the inquired differential curve characteristic as the working condition of the differential curve to be analyzed.
In one embodiment, to avoid calculating the differential curve under the mutable condition and improve the diagnosis speed, as shown in fig. 17, the pump well condition diagnosis device further includes:
the analysis module 1440 is used for judging whether the electrical parameter curve to be analyzed accords with the characteristics of the mutation working condition;
if the judgment result is yes, diagnosing the working condition of the oil pumping well according to the recognized mutation working condition characteristics;
if the result is no, diagnosing that the working condition of the pumping well is normal or gradual, and executing the step of calculating the differential curve to be analyzed by the calculating module 1420.
The oil well working condition diagnosis device provided by the invention obtains an electrical parameter curve to be analyzed in the stroke cycle of the oil pumping well; calculating to obtain a differential curve to be analyzed according to the electric parameter curve to be analyzed and the electric parameter curve of the normal working condition in the stroke cycle of the oil pumping well; according to the differential curve to be analyzed, the working condition of the oil pumping well is diagnosed, the working condition of the oil pumping well can be accurately analyzed under the condition that a load sensor is not used, and further the digital management of the oil well with low cost and high efficiency is realized.
As shown in fig. 18, which is a schematic diagram of a computer device architecture of embodiments herein, the computer device 1802 may include one or more processors 1804, such as one or more Central Processing Units (CPUs), each of which may implement one or more hardware threads. The computer device 1802 may also include any memory 1806 for storing a computer program executable on the processor 1804, which when executed by the processor 1804 implements the method for diagnosing pump well conditions according to any of the preceding embodiments. For example, and without limitation, memory 1806 may include any one or more of the following combinations: any type of RAM, any type of ROM, flash memory devices, hard disks, optical disks, etc. More generally, any memory may store information using any technique. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent fixed or removable components of the computer device 1802. In one case, when the processor 1804 executes associated instructions stored in any memory or combination of memories, the computer device 1802 can perform any of the operations of the associated instructions. The computer device 1802 also includes one or more drive mechanisms 1808 for interacting with any memory, such as a hard disk drive mechanism, optical disk drive mechanism, and the like.
The computer device 1802 may also include an input/output module 1810 (I/O) for receiving various inputs (via input devices 1812) and for providing various outputs (via output devices 1814)). One particular output mechanism may include a presentation device 1816 and an associated Graphical User Interface (GUI) 1818. In other embodiments, input/output module 1810 (I/O), input devices 1812, and output devices 1814 may not be included as only one computer device in a network. The computer device 1802 may also include one or more network interfaces 1820 for exchanging data with other devices via one or more communication links 1822. One or more communication buses 1824 couple the above-described components together.
The communication link 1822 may be implemented in any manner, e.g., through a local area network, a wide area network (e.g., the internet), a point-to-point connection, etc., or any combination thereof. Communication link 1822 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.
In one embodiment herein, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method for diagnosing a working condition of a rod-pumped well as described in any of the previous embodiments.
In one embodiment herein, there is also provided computer readable instructions, wherein when executed by a processor, the program therein causes the processor to perform the method for diagnosing a rod-pumped well condition as described in any of the previous embodiments.
The following describes the effects of the working condition diagnosis method for a pumping unit provided herein, taking a pumping unit at a certain place as an example:
first embodiment
As shown in fig. 19A (crank angle on the abscissa and power on the ordinate in fig. 19A), the electric power curve of the rod-pumped well is shown, the broken line is the electric power curve under normal conditions, and the solid line is the electric power curve to be analyzed. The characteristic that the working condition does not have the mutation working condition can be confirmed through the method shown in fig. 5, the working condition is gradual change, the constructed difference curve is shown in fig. 19B (the abscissa in fig. 19B is crank angle, the ordinate is power), the position of the point A is concave through analysis of the difference curve, the characteristic of insufficient liquid supply or gas influence is met through inquiring the characteristic database X', therefore, the working condition of the pumping unit well is confirmed to be the insufficient liquid supply or gas influence, and the working condition can be determined by combining manual judgment.
Second embodiment
As shown in fig. 20 (crank angle on the abscissa and power on the ordinate in fig. 20), the electric power curve of the pumping well is shown in dotted line, normal condition, and the electric power curve to be analyzed is shown in solid line. The characteristic of the abrupt change working condition, which is similar to a sinusoidal curve, can be confirmed by the method shown in fig. 5, and the characteristic of rod breakage is met by inquiring the characteristic database Y, so that the working condition of the rod-pumped well is identified as rod breakage.
It should be understood that, in the various embodiments herein, the sequence number of each process described above does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments herein.
It should also be understood that in embodiments herein, the term "and/or" is merely one relationship that describes an associated object, meaning that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the elements may be selected according to actual needs to achieve the objectives of the embodiments herein.
In addition, each functional unit in the embodiments herein may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions herein are essentially or portions contributing to the prior art, or all or portions of the technical solutions may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments herein. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Specific examples are set forth herein to illustrate the principles and embodiments herein and are merely illustrative of the methods herein and their core ideas; also, as will be apparent to those of ordinary skill in the art in light of the teachings herein, many variations are possible in the specific embodiments and in the scope of use, and nothing in this specification should be construed as a limitation on the invention.
Claims (10)
1. A method for diagnosing the condition of a pumping well, comprising:
acquiring an electrical parameter curve to be analyzed in the stroke cycle of the rod-pumped well;
calculating to obtain a differential curve to be analyzed according to the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the oil pumping well;
diagnosing the working condition of the pumping well according to the differential curve to be analyzed;
according to the differential curve to be analyzed, diagnosing the working condition of the oil pumping well, comprising:
identifying characteristics of the differential curve to be analyzed;
inquiring the characteristics of the differential curve to be analyzed in a characteristic database, wherein the characteristic database stores the corresponding relation between the characteristics of the differential curve under the gradual change working condition and the gradual change working condition, and the gradual change working condition comprises gas influence, insufficient liquid supply, leakage of a fixed valve, leakage of a traveling valve and wax precipitation;
and taking the working condition corresponding to the inquired characteristic of the differential curve as the working condition of the differential curve to be analyzed.
2. The method of claim 1, wherein obtaining an electrical parameter profile to be analyzed over a pump well stroke cycle comprises:
collecting an electrical parameter curve of the pumping well;
identifying the top dead center and the bottom dead center in the collected electric parameter curve of the pumping well;
and determining an electrical parameter curve to be analyzed in the stroke cycle of the oil pumping well according to the top dead center and the bottom dead center.
3. The method of claim 1, wherein calculating a differential curve to be analyzed based on the electrical parameter curve to be analyzed and the electrical parameter curve for normal conditions during the pump well stroke cycle comprises:
and carrying out difference processing on the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the oil pumping well, and calculating to obtain a differential curve to be analyzed.
4. The method of claim 1, further comprising, prior to calculating the differential curve to be analyzed:
judging whether the electrical parameter curve to be analyzed accords with the characteristics of the mutation working condition or not;
if the judgment result is yes, diagnosing the working condition of the oil pumping well according to the recognized mutation working condition characteristics;
if the judging result is negative, diagnosing that the working condition of the oil pumping well is normal or gradual, and executing the step of calculating the differential curve to be analyzed.
5. A pump well condition diagnostic device, comprising:
the acquisition module is used for acquiring an electrical parameter curve to be analyzed in the stroke cycle of the oil pumping well;
the calculation module is used for calculating and obtaining a differential curve to be analyzed according to the electric parameter curve to be analyzed and the electric parameter curve of the normal working condition in the stroke cycle of the oil pumping well;
the diagnosis module is used for diagnosing the working condition of the pumping well according to the differential curve to be analyzed;
the diagnostic module includes:
the identification unit is used for identifying the characteristics of the differential curve to be analyzed;
the query unit is used for querying the characteristics of the differential curve to be analyzed in a characteristic database, wherein the characteristic database stores the corresponding relation between the characteristics of the differential curve under the gradual change working condition and the gradual change working condition, and the gradual change working condition comprises gas influence, insufficient liquid supply, leakage of a fixed valve, leakage of a traveling valve and wax precipitation;
and the diagnosis unit is used for taking the working condition corresponding to the inquired characteristic of the differential curve as the working condition of the differential curve to be analyzed.
6. The apparatus of claim 5, wherein the acquisition module comprises:
the acquisition unit is used for acquiring an electrical parameter curve of the oil pumping well;
the identification unit is used for identifying the upper dead points and the lower dead points in the collected electrical parameter curves of the pumping unit well;
and the intercepting unit is used for determining an electric parameter curve to be analyzed in the stroke cycle of the rod-pumped well according to the top dead center and the bottom dead center.
7. The apparatus of claim 5, wherein the calculation module calculates a differential curve to be analyzed based on the electrical parameter curve to be analyzed and a normal operating condition electrical parameter curve during the pumping well stroke cycle, comprising:
and carrying out difference processing on the electrical parameter curve to be analyzed and the electrical parameter curve of the normal working condition in the stroke cycle of the oil pumping well, and calculating to obtain a differential curve to be analyzed.
8. The apparatus as recited in claim 5, further comprising:
the analysis module is used for judging whether the electrical parameter curve to be analyzed accords with the characteristics of the mutation working condition;
if the judgment result is yes, diagnosing the working condition of the oil pumping well according to the recognized mutation working condition characteristics;
if the judging result is negative, diagnosing that the working condition of the oil pumping well is normal or gradual, and executing the step of calculating the differential curve to be analyzed by the calculating module.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for diagnosing the condition of a rod-pumped well according to any one of claims 1 to 4 when executing the computer program.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores an execution computer program which, when executed by a processor, implements the method for diagnosing a working condition of a rod-pumped well according to any one of claims 1 to 4.
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