CN112112604A - Method and device for controlling pumping rows between low-permeability oil wells - Google Patents

Method and device for controlling pumping rows between low-permeability oil wells Download PDF

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CN112112604A
CN112112604A CN201910529969.0A CN201910529969A CN112112604A CN 112112604 A CN112112604 A CN 112112604A CN 201910529969 A CN201910529969 A CN 201910529969A CN 112112604 A CN112112604 A CN 112112604A
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oil
well
wells
oil wells
group
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CN112112604B (en
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刘猛
师俊峰
赵瑞东
许峤
张喜顺
曹刚
邓峰
张建军
彭翼
陈诗雯
李淇铭
陈冠宏
舒勇
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Petrochina Co Ltd
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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
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor

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Abstract

The application discloses a pumping row control method and a pumping row control device between low-permeability oil wells, wherein the method comprises the following steps: acquiring the current yield of each oil well in the target well group in real time; selecting a preset number of oil wells from the oil wells with the current yield larger than the yield threshold value as a first oil well, wherein the value of twice the preset number is smaller than or equal to the value of the number of the oil wells with the current yield larger than the yield threshold value; controlling oil cylinders corresponding to other oil wells except the first oil well in the target well group to run to a top dead center; selecting oil wells with the same number as the first oil wells from the oil wells which are operated to the top dead center by the oil cylinders and have the current yield larger than the yield threshold value as second oil wells; and controlling the oil cylinder corresponding to the first oil well to ascend and controlling the oil cylinder corresponding to the second oil well to descend. The low-permeability oil well group lifting differential operation can be realized, and the waiting phenomenon of the oil pumping equipment during lifting of the low-permeability oil well group is reduced.

Description

Method and device for controlling pumping rows between low-permeability oil wells
Technical Field
The application relates to the technical field of oil and gas exploitation, in particular to a pumping row control method and a pumping row control device between low-permeability oil wells.
Background
When the traditional beam pumping unit is used for recovering oil in a low-permeability oil well, because the low-permeability oil well has low capacity, an intermittent pumping mode is adopted, namely the beam pumping unit is operated for several hours to recover oil, and then the pumping is stopped for several hours.
When a hydraulic pumping unit is adopted for group lifting of a multi-port low-permeability oil well, the operation control mode of a bottom surface hydraulic station is that the oil well is divided into two groups, one group is ascended, and the other group is descended. The problems caused by the method are that the oil wells run asynchronously due to different oil well loads, and the phenomenon of waiting of oil pumping equipment occurs; because the stroke times are the same, the lifting differential operation of the low-permeability oil well group cannot be realized.
Disclosure of Invention
The embodiment of the application provides a pumping row control method between low permeability oil wells, which is used for realizing the lifting differential operation of a low permeability oil well group and reducing the waiting phenomenon of pumping equipment when the low permeability oil well group is lifted, and the method comprises the following steps:
acquiring the current yield of each oil well in the target well group in real time; selecting a preset number of oil wells from the oil wells with the current yield larger than the yield threshold value as a first oil well, wherein the value of twice the preset number is smaller than or equal to the value of the number of the oil wells with the current yield larger than the yield threshold value; controlling oil cylinders corresponding to other oil wells except the first oil well in the target well group to run to a top dead center; selecting oil wells with the same number as the first oil wells from the oil wells which are operated to the top dead center by the oil cylinders and have the current yield larger than the yield threshold value as second oil wells; and controlling the oil cylinder corresponding to the first oil well to ascend and controlling the oil cylinder corresponding to the second oil well to descend.
The embodiment of the application still provides a pumping row controlling means between hyposmosis oil well for realize that hyposmosis oil well group lifts differentiation operation, the wait phenomenon of oil pumping equipment when reducing hyposmosis oil well group and lifting, the device includes:
the acquisition module is used for acquiring the current yield of each oil well in the target well group in real time; the selection module is used for selecting a preset number of oil wells from the oil wells with the current yield larger than the yield threshold value, which are acquired by the acquisition module, as a first oil well, wherein the value of twice the preset number is smaller than or equal to the value of the number of the oil wells with the current yield larger than the yield threshold value; the control module is used for controlling oil cylinders corresponding to other oil wells except the first oil well selected by the selection module in the target well group to run to a top dead center; the selection module is also used for selecting the oil wells with the same number as the first oil wells from the oil wells with the oil cylinders running to the top dead center and the current yield being greater than the yield threshold value as second oil wells; and the control module is also used for controlling the oil cylinder corresponding to the first oil well to ascend and the oil cylinder corresponding to the second oil well to descend.
In the embodiment of the application, an oil well with the current yield larger than the yield threshold value is selected from the target well group to operate as an oil well for pumping oil, and an oil well with the current yield smaller than the yield threshold value waits for the increase of the yield at the top dead center without participating in the current oil pumping process, so that the lifting differential operation of the oil well in the low-permeability oil well group is realized; besides, when other oil wells except the oil well which participates in lifting oil pumping wait at the top dead center, the yield is increased, and the oil wells can participate in the lifting oil pumping process after the yield is greater than the yield threshold value, so that the oil wells which pump oil exist in the well group in more time, and the waiting time of oil pumping equipment is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a flow chart of a method for controlling pumping between low permeability wells according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a pumping row control device between low permeability wells in an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present application are provided herein to explain the present application and not to limit the present application.
The embodiment of the application provides a pumping row control method between low-permeability oil wells, as shown in fig. 1, the method comprises steps 101 to 105:
and 101, acquiring the current yield of each oil well in the target well group in real time.
The current production of the well is the amount of well production fluid currently entering the pump barrel of the pump, which can be characterized by weight or volume.
In the embodiment of the application, oil wells with similar upper stroke loads and lower stroke loads are selected to form a target well group. Specifically, the target well group is determined by the following method:
determining oil extraction parameters of each oil well in the cluster well group according to the oil testing result of the cluster well group; determining the upper stroke load and the lower stroke load of each oil well according to the oil extraction parameters; determining any oil well as a reference oil well, and calculating the absolute value of the difference value between the upper stroke load of other oil wells except the reference oil well and the upper stroke load of the reference oil well as serving as a first difference value; calculating the absolute value of the difference value between the down stroke load of the other oil wells and the down stroke load of the reference oil well as using the absolute value as a second difference value; enabling the oil wells with the first difference value smaller than a first threshold value and the second difference value smaller than a second threshold value to form an alternative well group with the reference oil wells; and if the number of the oil wells in the alternative well group is more than or equal to 3, determining the alternative well group as the target well group.
The first threshold and the second threshold can be determined according to actual conditions. In general, the first threshold is set to 10% of the upper stroke load of the reference well, and the second threshold is set to 10% of the lower stroke load of the reference well.
And if the number of the oil wells in the alternative well group is less than 3, re-determining the reference well and the target well group.
In the embodiment of the application, the oil production parameters comprise the mass of the sucker rod in the liquid per meter, the density of the fluid in the oil pipe, the depth of a lower pump, the pump diameter of an oil well pump, the depth of a working fluid level, the pressure of the oil pipe and the pressure of a sleeve.
Determining the upper stroke load and the lower stroke load of each oil well according to the oil extraction parameters, wherein the method comprises the following steps: according to the formula
Figure BDA0002099434030000031
Calculating plunger area A of oil-well pumpp(ii) a According to formula POn the upper part＝10-3[gqrL+ApghρL+106(pτ-pc)Ap]Determining the upstroke load P for each wellOn the upper part(ii) a According to formula PLower part＝10-3gqrL determining the downstroke load P of each wellLower part。
Wherein D isPump and method of operating the sameThe unit is the pump diameter of the oil well pump and m; g is the acceleration of gravity; q. q.srThe mass of each meter of the sucker rod in the liquid is kg/m; l is the lower pump depth in m; h is the working fluid level depth, and the unit is m; rhoLIs the density of fluid in the oil pipe, and the unit is kg/m3；pτIs the pressure of the oil pipe, and the unit is MPa; p is a radical ofcIs the casing pressure in MPa.
In addition, the oil production parameters determined according to the test result of the cluster well group also comprise the depth H of a lower pump and the submergence degree H, and the theoretical liquid production quantity Q can be determined according to the test result of the cluster well group. The diameter D of the oil well pump under the condition of determining theoretical liquid production quantity Q, lower pump depth H and submergence degree HPump and method of operating the sameThe size of the oil well determines the structure of the sucker rod string and the stroke load P on the oil wellOn the upper partDown stroke load PLower partAs well as the stroke length S and the number of strokes n. In specific implementation, the diameter D of the oil-well pumpPump and method of operating the sameThe greater the up-stroke load P of the wellOn the upper partAnd down stroke load PLower partThe larger the combination of stroke length S and stroke number n; otherwise, the diameter D of the oil pumpPump and method of operating the sameThe smaller, the upper stroke load P of the wellOn the upper partAnd down stroke load PLower partThe smaller the combination of stroke length S and number of strokes n. The diameter D of the oil pump is usually selected to be smallerPump and method of operating the sameSo as to simplify the structure of the sucker rod string and reduce the upper stroke load P of the oil wellOn the upper partAnd down stroke load PLower partLess hydraulic system pressure is used.
Furthermore, after determining the working parameters such as oil well pairing, cylinder diameter and the like, the upper stroke load P of the oil well can be determinedOn the upper partCalculating the working pressure p of the hydraulic systemOn the upper partThe calculation formula is as follows:
Figure BDA0002099434030000041
wherein,
Figure BDA0002099434030000042
AcylinderIs the effective area of the oil cylinder and has the unit of m2，DCylinderIs the diameter of the oil cylinder and has the unit of m, DRodIs the diameter of the piston rod, and the unit is m; and delta p is the pipeline loss from the oil pump to the oil cylinder, and the unit is MPa.
In addition, the displacement Q of the oil cylinder can be calculated according to the stroke length S and the stroke times n of the oil cylinderCylinderThe calculation formula is as follows:
Qcylinder＝120ACylinderSn
According to the working pressure p of the hydraulic pumping unit systemOn the upper partAnd the oil cylinder discharge capacity QCylinderThe power N required by the upward movement of the oil cylinder can be determinedOn the upper part：
NOn the upper part＝pOn the upper partQCylinderρOilg/3.6
Where ρ isOilIs the density of the hydraulic oil and has the unit of kg/m3。
Can also be based on the down stroke load P of the oil wellLower partCalculating the working pressure p of the hydraulic systemLower partThe calculation formula is as follows:
Figure BDA0002099434030000043
according to the working pressure p of the hydraulic pumping unit systemLower partAnd the oil cylinder discharge capacity QCylinderThe power N released by the downward movement of the oil cylinder can be determinedLower part：
NLower part＝pLower partQCylinderρOilg/3.6
Because all the power released by the downward movement of the oil cylinder cannot be recycled, the actual downward recovery power of the oil cylinder needs to be calculated according to all the power released by the downward movement of the oil cylinder and the energy recycling efficiency. And meanwhile, paired well pairs are formed by the upward and downward oil wells, and the energy recovery and utilization efficiency of an open system and a closed system formed by the paired well pairs is different. The energy recycling efficiency of the closed system reaches more than 90%, and the energy recycling efficiency of the open system reaches more than 60%.
It should be noted that, when the power of the oil cylinder during lifting is greater than the power that can be provided by the system due to the sand jam of the downhole oil pump, overload will occur, and overload protection measures need to be taken to ensure the safety of the oil pumping equipment. The overload protection measures comprise hydraulic system overvoltage protection, motor overcurrent protection and the like.
In the embodiment of the application, the wells with different upper stroke loads and lower stroke loads can be grouped into well groups, and the wells can be operated in the intermediate pumping mode from step 102 to step 105. However, it should be noted that when the oil wells with different upper stroke loads and lower stroke loads form a well group, the diameter of the oil cylinder corresponding to the oil well with the larger upper stroke load needs to be adjusted to be larger, so that the hydraulic oil flow rates are different, and the pressure of the upper stroke of the two oil wells going upwards and downwards at the same time can be ensured to be similar.
And 102, selecting a preset number of oil wells from the oil wells with the current yield larger than the yield threshold value as a first oil well.
Wherein the value of twice the preset number is less than or equal to the value of the number of wells for which the current production is greater than the production threshold. The yield threshold value can be determined according to the ascending and descending lifting conditions of the oil cylinder, and when the yield threshold value is reached, the oil cylinder can participate in the lifting process. The specific value of the yield threshold is not limited herein.
And if the number of the oil wells in the target well group is more than or equal to 3 and less than or equal to 5, determining the preset number as 1. That is, the cylinder corresponding to one oil well in the target well group is at the bottom dead center, the cylinders corresponding to other oil wells are all at the top dead center, and when the cylinder at the bottom dead center moves upwards, one of the cylinders at the top dead center moves downwards.
If the number of oil wells in the target well group is greater than or equal to 6, the preset number is determined to be 2. That is, the cylinders corresponding to two oil wells in the target well group are at the bottom dead center, the cylinders corresponding to other oil wells are all at the top dead center, and when the two cylinders at the bottom dead center move upwards, the two cylinders at the top dead center move downwards.
Or when the number of the oil wells in the target well group is greater than or equal to 6, dividing the target well group into at least two groups, and respectively determining the first oil well in each group according to the preset number of 1, wherein the number of the oil wells in each group in the at least two groups is greater than or equal to 3 and less than or equal to 6. Correspondingly, each of the at least two groups of the divided oil cylinders adopts a respective hydraulic system to independently operate, and one oil cylinder ascends and one oil cylinder descends at the same time.
And 103, controlling oil cylinders corresponding to other oil wells except the first oil well in the target well group to run to the top dead center.
When the oil cylinder stays at the top dead center, the staying oil cylinder drives the oil well pump for a longer time, so that the produced liquid of the oil well has sufficient time to enter a pump cylinder of the oil well pump, and the suction filling degree of the oil well pump is improved.
And 104, selecting the oil wells with the number equal to that of the first oil wells from the oil wells with the oil cylinders running to the top dead center and the current yield larger than the yield threshold value as second oil wells.
And 105, controlling the oil cylinder corresponding to the first oil well to ascend, and controlling the oil cylinder corresponding to the second oil well to descend.
Taking J oil wells with numbers from 1 to J, and the current production of the oil wells is greater than or equal to the production threshold value as an example, the above-mentioned pumping line control method between low-permeability oil wells will be described below with reference to the number of the oil cylinders.
1. Starting from a first oil well, controlling a hydraulic system to respectively move an oil cylinder (1), an oil cylinder (2) and the like corresponding to the oil well to a top dead center, and controlling the oil cylinders to keep at the top dead center position until an oil cylinder (J-1) corresponding to a (J-1) th oil well is moved to the top dead center;
2. starting from the J-th oil well, performing intermittent pumping operation based on 'one control two', namely, the oil cylinder (J) ascends and the oil cylinder (1) descends; then the oil cylinder (1) moves upwards, and the oil cylinder (2) moves downwards; and repeating the operation in a circulating way until each oil cylinder completes one working cycle, which is a cycle period. In a cycle period, each oil cylinder completes one working cycle. Wherein a duty cycle refers to completion of an upstroke and a downstroke.
If the current yield of the oil well is larger than or equal to the yield threshold value, the oil cylinders corresponding to the oil well can be operated one by one according to the numbering sequence, but in some cases, the current yield of the oil well is smaller than the yield threshold value, and when the oil cylinder corresponding to the oil well is turned to descend according to the numbering sequence, the oil cylinder cannot meet the descending condition, the oil cylinder can be skipped, and the oil cylinder with the adjacent number can descend. That is, in the embodiments of the present application, when a certain well in the target well group has a low production rate compared to other wells, the number of working cycles of the well can be reduced. Such as within a cycle period, the well completes one duty cycle while other wells complete two or more duty cycles; when a well has a high production rate compared to other wells, the number of cycles of operation of the well may be increased. For example, within a cycle period, other wells complete one duty cycle, while the well completes two or more duty cycles.
In addition, if the speed of the oil well output liquid entering the pump cylinder of the oil well pump is high, the oil cylinder can be supported to lift for many times, and the target well group can also adopt the following pumping mode:
after the first pair of wells is operated for several hours, the second pair of wells is operated for several hours, and so on. When the output of a certain pair of oil wells is small, the working time of the pair of oil wells can be controlled to be short, and the pause time is long; when the output of a certain pair of oil wells is larger, the time for controlling the pair of oil wells to work is longer, and the time for stopping the pair of oil wells is shorter. Wherein, a pair of oil wells refers to the oil wells corresponding to the oil cylinders which move upwards and downwards at the same time.
In the embodiment of the application, an oil well with the current yield larger than the yield threshold value is selected from the target well group to operate as an oil well for pumping oil, and an oil well with the current yield smaller than the yield threshold value waits for the increase of the yield at the top dead center without participating in the current oil pumping process, so that the lifting differential operation of the oil well in the low-permeability oil well group is realized; besides, when other oil wells except the oil well which participates in lifting oil pumping wait at the top dead center, the yield is increased, and the oil wells can participate in the lifting oil pumping process after the yield is greater than the yield threshold value, so that the oil wells which pump oil exist in the well group in more time, and the waiting time of oil pumping equipment is reduced.
The embodiment of the application provides a pumping line control device between low-permeability oil wells, and as shown in fig. 2, the device 200 comprises an acquisition module 201, a selection module 202 and a control module 203.
The obtaining module 201 is configured to obtain, in real time, a current yield of each oil well in the target well group.
A selecting module 202, configured to select, as a first well, a preset number of wells from the wells with the current yield greater than the yield threshold acquired by the acquiring module 201, where a value twice the preset number is less than or equal to a value of the number of wells with the current yield greater than the yield threshold.
And the control module 203 is used for controlling the oil cylinders corresponding to other oil wells except the first oil well selected by the selection module 202 in the target well group to run to the top dead center.
And the selection module 202 is further used for selecting the oil wells with the number equal to that of the first oil wells from the oil wells with the oil cylinders running to the top dead center and the current yield being larger than the yield threshold value as the second oil wells.
The control module 203 is further configured to control the oil cylinder corresponding to the first oil well to ascend, and the oil cylinder corresponding to the second oil well to descend.
In an implementation manner of the embodiment of the present application, the apparatus 200 further includes a determining module 204 configured to:
determining oil extraction parameters of each oil well in the cluster well group according to the oil testing result of the cluster well group;
determining the upper stroke load and the lower stroke load of each oil well according to the oil extraction parameters;
determining any oil well as a reference oil well, and calculating the absolute value of the difference value between the upper stroke load of other oil wells except the reference oil well and the upper stroke load of the reference oil well as serving as a first difference value; calculating the absolute value of the difference value between the down stroke load of the other oil wells and the down stroke load of the reference oil well as using the absolute value as a second difference value;
enabling the oil wells with the first difference value smaller than a first threshold value and the second difference value smaller than a second threshold value to form an alternative well group with the reference oil wells;
and when the number of the oil wells in the alternative well group is more than or equal to 3, determining the alternative well group as the target well group.
In an implementation manner of the embodiment of the present application, the determining module 204 is further configured to:
and when the number of the oil wells in the alternative well group is less than 3, re-determining the reference well and the target well group.
In an implementation of the embodiment of the present application, the oil production parameters include the mass of the sucker rod per meter in the liquid, the fluid density in the oil pipe, the pump-down depth, the pump diameter of the oil pump, the depth of the working fluid level, the oil pipe pressure, and the casing pressure.
A determining module 204 configured to:
according to the formula
Figure BDA0002099434030000071
Calculating plunger area A of oil-well pumpp；
According to formula POn the upper part＝10-3[gqrL+ApghρL+106(pτ-pc)Ap]Determining the upstroke load P for each wellOn the upper part；
According to formula PLower part＝10-3gqrL determining the downstroke load P of each wellLower part；
Wherein D isPump and method of operating the sameThe unit is the pump diameter of the oil well pump and m; g is the acceleration of gravity; q. q.srThe mass of each meter of the sucker rod in the liquid is kg/m; l is the lower pump depth in m; h is the working fluid level depth, and the unit is m; rhoLIs the density of fluid in the oil pipe, and the unit is kg/m3；pτIs the pressure of the oil pipe, and the unit is MPa; p is a radical ofcIs the casing pressure in MPa.
In one implementation of the embodiments of the present application, if the number of wells in the target well group is greater than or equal to 3 and less than or equal to 5, the preset number is determined to be 1.
In one implementation of the embodiment of the present application, if the number of oil wells in the target well group is greater than or equal to 6, the preset number is determined to be 2; or dividing the target well group into at least two groups, and respectively determining the first oil well in each group of oil wells according to the preset number of 1, wherein the number of each group of oil wells in the at least two groups is more than or equal to 3 and less than or equal to 6.
In the embodiment of the application, an oil well with the current yield larger than the yield threshold value is selected from the target well group to operate as an oil well for pumping oil, and an oil well with the current yield smaller than the yield threshold value waits for the increase of the yield at the top dead center without participating in the current oil pumping process, so that the lifting differential operation of the oil well in the low-permeability oil well group is realized; besides, when other oil wells except the oil well which participates in lifting oil pumping wait at the top dead center, the yield is increased, and the oil wells can participate in the lifting oil pumping process after the yield is greater than the yield threshold value, so that the oil wells which pump oil exist in the well group in more time, and the waiting time of oil pumping equipment is reduced.
The embodiment of the present application further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the processor implements any one of the methods described in step 101 to step 105.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program for executing any one of the methods in step 101 to step 105 is stored in the computer-readable storage medium.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (11)

1. A method of controlling pumping rows between low permeability wells, the method comprising:
acquiring the current yield of each oil well in the target well group in real time;
selecting a preset number of oil wells from the oil wells with the current yield larger than the yield threshold value as a first oil well, wherein the value of twice the preset number is smaller than or equal to the value of the number of the oil wells with the current yield larger than the yield threshold value;
controlling oil cylinders corresponding to other oil wells except the first oil well in the target well group to run to a top dead center;
selecting oil wells with the same number as the first oil wells from the oil wells which are operated to the top dead center by the oil cylinders and have the current yield larger than the yield threshold value as second oil wells;
and controlling the oil cylinder corresponding to the first oil well to ascend and controlling the oil cylinder corresponding to the second oil well to descend.
2. The method of claim 1, wherein prior to obtaining the current production of each well in the cluster set of wells in real-time, the method further comprises:
determining oil extraction parameters of each oil well in the cluster well group according to the oil testing result of the cluster well group;
determining the upper stroke load and the lower stroke load of each oil well according to the oil extraction parameters;
determining any oil well as a reference oil well, and calculating the absolute value of the difference value between the upper stroke load of other oil wells except the reference oil well and the upper stroke load of the reference oil well as serving as a first difference value; calculating the absolute value of the difference value between the down stroke load of the other oil wells and the down stroke load of the reference oil well as using the absolute value as a second difference value;
enabling the oil wells with the first difference value smaller than a first threshold value and the second difference value smaller than a second threshold value to form an alternative well group with the reference oil wells;
and if the number of the oil wells in the alternative well group is more than or equal to 3, determining the alternative well group as the target well group.
3. The method of claim 2, wherein after having the first difference less than the first threshold and the second difference less than the second threshold forming an alternative well group with the reference well, the method further comprises:
and if the number of the oil wells in the alternative well group is less than 3, re-determining the reference well and the target well group.
4. The method of claim 2, wherein the production parameters include mass in liquid per meter of sucker rod, fluid density in tubing, pump down depth, pump diameter, working fluid level depth, tubing pressure, and casing pressure;
the determining of the upper stroke load and the lower stroke load of each oil well according to the oil extraction parameters comprises the following steps:
according to the formula
Figure FDA0002099434020000011
Calculating plunger area A of oil-well pumpp；
According to formula POn the upper part＝10-3[gqrL+ApghρL+106(pτ-pc)Ap]Determining the upstroke load P for each wellOn the upper part；
According to formula PLower part＝10-3gqrL determining the downstroke load P of each wellLower part；
Wherein D isPump and method of operating the sameThe unit is the pump diameter of the oil well pump and m; g is the acceleration of gravity; q. q.srThe mass of each meter of the sucker rod in the liquid is kg/m; l is the lower pump depth in m; h is the working fluid level depth, and the unit is m; rhoLIs the density of fluid in the oil pipe, and the unit is kg/m3；pτIs the pressure of the oil pipe, and the unit is MPa; p is a radical ofcIs the casing pressure in MPa.
5. The method of claim 1, wherein the predetermined number is determined to be 1 if the number of wells in the target well group is 3 or more and 5 or less.
6. The method of claim 1,
if the number of the oil wells in the target well group is more than or equal to 6, determining the preset number as 2;
or dividing the target well group into at least two groups, and respectively determining the first oil well in each group of oil wells according to the preset number of 1, wherein the number of each group of oil wells in the at least two groups is more than or equal to 3 and less than or equal to 6.
7. A low permeability interwell pumping row control apparatus, the apparatus comprising:
the acquisition module is used for acquiring the current yield of each oil well in the target well group in real time;
the selection module is used for selecting a preset number of oil wells from the oil wells with the current yield larger than the yield threshold value, which are acquired by the acquisition module, as a first oil well, wherein the value of twice the preset number is smaller than or equal to the value of the number of the oil wells with the current yield larger than the yield threshold value;
the control module is used for controlling oil cylinders corresponding to other oil wells except the first oil well selected by the selection module in the target well group to run to a top dead center;
the selection module is also used for selecting the oil wells with the same number as the first oil wells from the oil wells with the oil cylinders running to the top dead center and the current yield being greater than the yield threshold value as second oil wells;
and the control module is also used for controlling the oil cylinder corresponding to the first oil well to ascend and the oil cylinder corresponding to the second oil well to descend.
8. The apparatus of claim 7, further comprising a determination module configured to:
determining oil extraction parameters of each oil well in the cluster well group according to the oil testing result of the cluster well group;
determining the upper stroke load and the lower stroke load of each oil well according to the oil extraction parameters;
determining any oil well as a reference oil well, and calculating the absolute value of the difference value between the upper stroke load of other oil wells except the reference oil well and the upper stroke load of the reference oil well as serving as a first difference value; calculating the absolute value of the difference value between the down stroke load of the other oil wells and the down stroke load of the reference oil well as using the absolute value as a second difference value;
enabling the oil wells with the first difference value smaller than a first threshold value and the second difference value smaller than a second threshold value to form an alternative well group with the reference oil wells;
and when the number of the oil wells in the alternative well group is more than or equal to 3, determining the alternative well group as the target well group.
9. The apparatus of claim 8, wherein the determining module is further configured to:
and when the number of the oil wells in the alternative well group is less than 3, re-determining the reference well and the target well group.
10. 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 of any one of claims 1 to 6 when executing the computer program.
11. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 6.
CN201910529969.0A 2019-06-19 2019-06-19 Method and device for controlling pumping rows between low-permeability oil wells Active CN112112604B (en)

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