CN113298669A - Method and device for determining pumping period of pumping well based on pressure recovery data - Google Patents
Method and device for determining pumping period of pumping well based on pressure recovery data Download PDFInfo
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Abstract
The invention discloses a method and a device for determining a pumping cycle of a pumping well based on pressure recovery data, wherein the method comprises the following steps: acquiring pressure recovery data of the pressure rise of a shaft in the pumping well after the primary pumping period is finished; determining the target moment when the well cylinder pressure in the pumping well reaches a stable state according to the pressure recovery data; calculating the average speed of pressure recovery from the starting moment to the target moment of the shaft pressure in the pumping well; and determining the moment when the rising speed of the well bore pressure in the pumping well reaches the pressure recovery average speed as the pumping period of the pumping well. The invention can obtain a pumping period with reasonable duration, which can not cause that the fluid in the stratum is difficult to enter a shaft because of overlong pumping period, and can not cause that the pumping frequency is increased because of overlong pumping period, thereby damaging the stratum and increasing the pumping cost.
Description
Technical Field
The invention relates to the technical field of petroleum logging, in particular to a method and a device for determining a pumping cycle of a pumping well based on pressure recovery data.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
In the pumping well, formation fluid flows into a shaft from the formation by means of the elasticity of the formation fluid, is stored in the shaft, and is pumped by pumping equipment after the crude oil level rises to a certain height. After each pumping operation is finished, the liquid level of the fluid in the shaft is lowered, the pressure is reduced, the formation fluid flows into the shaft again, after a certain amount of crude oil is stored in the shaft, the next oil fishing is carried out, and the process is repeated.
In the process of storing formation fluid in the shaft, the fluid expands to flow into the shaft in the initial stage, the pressure rising speed is high, the liquid level in the shaft gradually rises along with the increase of the liquid entering the well, the flow pressure in the shaft rises, the production pressure difference becomes small, and the speed of the fluid flowing into the shaft is gradually reduced until the fluid is infinitely close to the minimum value.
If the pumping period is longer, the bottom hole flow pressure rises to be infinitely close to the formation pressure, and at the moment, the fluid in the formation almost does not flow into the shaft any more, so that not only is the time consumed, but also the oil production is influenced; if the pumping cycle is short and the pumping frequency is increased, not only the pumping cost is increased, but also the formation is damaged, so how to quantitatively determine a reasonable pumping cycle is an urgent technical problem to be solved at present.
Disclosure of Invention
The embodiment of the invention provides a method for determining a pumping period of a pumping well based on pressure recovery data, which is used for solving the technical problems that the pumping period of the pumping well cannot be determined quantitatively in the prior art, so that the pumping period is too long, the fluid in a stratum is easy to enter a shaft, and the pumping period is too short, the pumping frequency is increased, and further the stratum is damaged, wherein the method comprises the following steps: acquiring pressure recovery data of the pressure rise of a shaft in the pumping well after the primary pumping period is finished; determining the target moment when the well cylinder pressure in the pumping well reaches a stable state according to the pressure recovery data; calculating the average speed of pressure recovery from the starting moment to the target moment of the shaft pressure in the pumping well; and determining the moment when the rising speed of the well bore pressure in the pumping well reaches the pressure recovery average speed as the pumping period of the pumping well.
The embodiment of the invention also provides a device for determining the pumping period of a pumping well based on pressure recovery data, which is used for solving the technical problems that the pumping period of the pumping well can not be determined quantitatively in the prior art, so that the pumping period is too long, the fluid in the stratum is easy to enter a shaft, and the pumping period is too short, the pumping frequency is increased, and the stratum is damaged, wherein the device comprises: the pressure recovery data measurement module is used for acquiring pressure recovery data of the pressure rise of a shaft in the pumping well after the completion of one pumping period; the pressure recovery data processing module is used for determining the target moment when the pressure of the well cylinder in the pumping well reaches a stable state according to the pressure recovery data; the pressure recovery average speed calculation module is used for calculating the pressure recovery average speed from the starting moment to the target moment of the well tube pressure in the pumping well; and the pumping period determining module is used for determining the moment when the rising speed of the well barrel pressure in the pumping well reaches the pressure recovery average speed as the pumping period of the pumping well.
The embodiment of the invention also provides computer equipment for solving the technical problems that the pumping period of a pumping well cannot be determined quantitatively in the prior art, so that the pumping period is too long, the fluid in the stratum is difficult to enter a shaft, and the pumping frequency is increased and the stratum is damaged due to too short pumping period.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problems that the pumping period of a pumping well cannot be determined quantitatively in the prior art, so that the pumping period is too long, the fluid in the stratum is difficult to enter a shaft, and the pumping frequency is increased and the stratum is damaged due to too short pumping period.
In the embodiment of the invention, the change condition of the shaft pressure is analyzed by measuring the pressure recovery data generated by the rise of the liquid level in the pumping well, the pressure recovery average speed is calculated, and the moment corresponding to the pressure recovery average speed is determined as the pumping period of the pumping well, so that a pumping period with reasonable duration can be obtained, the phenomenon that the fluid in the stratum is difficult to enter the shaft due to the overlong pumping period is avoided, the phenomenon that the pumping frequency is increased due to the overlong pumping period is avoided, the stratum is damaged, and the pumping cost is increased.
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In order to more clearly illustrate the embodiments of the present invention 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 invention, 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 determining a pumping cycle of a pumped well based on pressure recovery data according to an embodiment of the present invention;
fig. 2 is a schematic view of a pumpingwell according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wellbore pressure recovery curve of a pumpingwell in accordance with an embodiment of the present invention;
FIG. 4 is a schematic illustration of a wellbore pressure recovery rate curve for a pumpingwell in accordance with an embodiment of the present invention;
fig. 5 is a schematic diagram of an apparatus for determining a pumping cycle of a pumping well based on pressure recovery data according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a computer device provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In the description of the present specification, the terms "comprising," "including," "having," "containing," and the like are used in an open-ended fashion, i.e., to mean including, but not limited to. Reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the embodiments is for illustrative purposes to illustrate the implementation of the present application, and the sequence of steps is not limited and can be adjusted as needed.
An embodiment of the present invention provides a method for determining a pumping cycle of a pumping well based on pressure recovery data, and fig. 1 is a flowchart of a method for determining a pumping cycle of a pumping well based on pressure recovery data, as shown in fig. 1, the method includes the following steps:
s101, pressure recovery data of the pressure rise of the shaft in the pumping well after the pumping period is finished is obtained.
It should be noted that, in the embodiment of the present invention, the pumping cycle refers to a cycle of one pumping operation. In the method for determining the pumping cycle of the pumping well based on the pressure recovery data provided in the embodiment of the present invention, pressure recovery data of the pressure rise of the well bore in the pumping well after one pumping operation needs to be obtained, and the pressure recovery data of the pressure rise of the well bore in the pumping well after the last pumping cycle is finished is obtained in step S101.
Specifically, after the last pumping cycle is finished, the pressure gauge can be lowered into the pumping well, and pressure recovery data of the well bore pressure in the pumping well within a preset measuring time length is measured.
And S102, determining the target moment when the pressure of the well cylinder in the pumping well reaches a stable state according to the pressure recovery data.
In one embodiment, the step S102 may be implemented by: acquiring a first rising speed corresponding to the well cylinder pressure in the pumping well at a first pressure recovery moment and a second rising speed corresponding to a second pressure recovery moment, wherein the first pressure recovery moment and the second pressure recovery moment are two adjacent pressure recovery moments in a pressure recovery period; calculating a speed difference value between the first rising speed and the second rising speed; and when the speed difference is smaller than or equal to the preset speed threshold, determining the first pressure recovery moment as a target moment when the shaft pressure in the pumping well reaches a stable state.
And S103, calculating the average speed of pressure recovery from the starting moment to the target moment of the shaft pressure in the pumping well.
It should be noted that, if the pressure recovery data of the wellbore pressure rise in the pumping well after the last pumping cycle is obtained in S101, the starting time in S103 may be the time when the last pumping cycle is ended; if the pressure recovery data of the pressure rise in the pumping well after the first pumping cycle is completed is obtained in S101, the starting time in S103 may be the time when the first pumping operation is started.
In one embodiment, the step S103 may be implemented by: acquiring pressure values of the well cylinder pressure in the pumping well at a starting moment and a target moment; calculating the pressure recovery speed of the well tube pressure in the pumping well at the target moment according to the pressure values of the well tube pressure in the pumping well at the starting moment and the target moment; and calculating the average pressure recovery speed from the starting time to the target time of the shaft pressure in the pumping well according to the pressure recovery speed of the shaft pressure in the pumping well at the target time by using an integral method.
And S104, determining the moment when the rising speed of the well tube pressure in the pumping well reaches the pressure recovery average speed as the pumping period of the pumping well.
Specifically, after the pressure recovery average speed of the well tube pressure rise in the pumping well is determined, the time when the rise speed of the well tube pressure in the pumping well reaches the pressure recovery average speed can be obtained, and then the time when the rise speed of the well tube pressure in the pumping well reaches the pressure recovery average speed is determined as the pumping period of the pumping well.
As can be seen from the above, in the method for determining a pumping cycle of a pumping well based on pressure recovery data provided in the embodiment of the present invention, the pressure recovery data of the pressure rise of the well bore in the pumping well after the last pumping cycle is completed is measured, the target time at which the well bore pressure in the pumping well reaches the stable state is determined according to the measured pressure recovery data, and the pressure recovery average speed of the well bore pressure in the pumping well from the start time to the target time is further calculated, so as to obtain the time at which the rising speed of the well bore pressure in the pumping well reaches the pressure recovery average speed, and determine the time at which the rising speed of the well bore pressure in the pumping well reaches the pressure recovery average speed as the pumping cycle of the pumping well.
By the method for determining the pumping period of the pumping well based on the pressure recovery data, provided by the embodiment of the invention, the pumping period with reasonable time can be obtained, so that the phenomenon that fluid in the stratum is difficult to enter a shaft due to the overlong pumping period is avoided, the phenomenon that the pumping frequency is increased due to the overlong pumping period is avoided, the stratum is damaged, and the pumping cost is increased.
Fig. 2 is a schematic diagram of a pumping well according to an embodiment of the present invention, as shown in fig. 2, H represents the depth in the oil layer, and is given by m; p0Indicates the initial liquid level h0The corresponding shaft pressure is measured in MPa; pTIndicating a return of the liquid level to the maximum height hTThe corresponding shaft pressure is measured in MPa; pwftThe corresponding shaft pressure at the time t in the liquid level recovery process is represented, and the unit is MPa; h istIs shown at t0～tiThe height of the liquid level corresponding to the time t in the time period is m, and can be obtained through measurement.
In practical implementation, the method for determining the pumping cycle of the pumping well based on the pressure recovery data provided in the embodiment of the present invention may be implemented by the following steps:
firstly, a pressure gauge is put into the middle part of an oil layer to measure the change condition of the pressure of a well barrel in the pumping well, and the initial pressure is P0After a predetermined measurement time T (extended as far as possible to obtain a complete pressure curve during the test), the end pressure is measured as PTWhile the liquid level is at the same time from h0Is raised to hT。hTThe highest recovery height of the liquid level in the shaft is expressed, and the unit is m and can be obtained through measurement; is shown at t0～tiHeight of liquid level in well bore in time periodM, which can be obtained by measurement; t represents the liquid level in the shaft by h0Is raised to hTThe required duration is in days, i.e. d.
Secondly, drawing a shaft pressure recovery curve according to the shaft pressure recovery data obtained by measurement, as shown in figure 3. The pressure expression during pressure recovery is:
wherein, PwftThe corresponding shaft pressure at the time t in the liquid level recovery process is represented, and the unit is MPa; p0The unit of the shaft pressure corresponding to the measured initial liquid level is MPa; q represents in MPa-(ii) a Mu represents the fluid viscosity in mPa.s; b represents the volume coefficient of the fluid, and has no dimension; k represents formation permeability, mD; h represents the thickness of the stratum and has the unit of m;
denotes formation porosity,%; ctRepresenting the overall compressibility of the formation and the fluid therein, in MPa-1；rwRepresents the well diameter and has the unit of m; s represents the epidermal coefficient, dimensionless.
As can be seen from equation (1), the difference between the pressure of the wellbore pressure during the recovery process and the initial pressure is linear with the logarithm of the recovery time.
Assuming an initial pressure P0Initial time t0Initial liquid level h0And then:
as can be seen from equation (2), the pressure recovery amplitude is linear with the logarithm of the recovery time.
And thirdly, obtaining the pressure rising speed by performing derivation on two ends of the formula (2):
wherein p' represents the rising speed of the pressure of the shaft, and the unit is MPa/h; h istIndicating the fluid level in the wellbore at time t.
As can be seen from the equation (3), the pressure recovery rate is inversely related to time, and as can be seen from the pressure recovery rate curve shown in fig. 4, the pressure recovery rate is infinitely close to 0, but never reaches 0.
Fourthly, according to empirical data, when the pressure is recovered to the value of the pressure rise per day which is less than or equal to 0.01MPa/d, the pressure is considered to reach a stable value, and the value of the pressure rise per hour is converted into 0.0004MPa/h, which can be taken as a standard: that is, when the difference between the two adjacent pressure rising rates is less than or equal to 0.0004MPa/h, the pressure is considered to be stable, the pressure rising rate approaches a minimum value, and the corresponding time at this time is determined as the time at which the pressure reaches the stable state (i.e., the target time).
Wherein p isi+1' represents ti+1The pressure recovery speed (namely the pressure rising speed of the well bore) corresponding to the moment; p is a radical ofi' represents tiThe rate of pressure recovery (i.e., the rate of wellbore pressure rise) at that time.
When p isi+1'-piWhen the pressure is less than or equal to 0.0004MPa/h, t is determinediThe time when the pressure rising speed is close to the limit small value, that is, the target time when the pressure reaches the steady state.
Fourthly, calculating the pressure stabilization time t by the formula (4)iCalculating t by integration method according to the pressure recovery rate0～tiAverage rate of pressure recovery over a period of time
Substituting the average pressure recovery speed calculated by the formula (6) into the formula (3), calculating the time t when the pressure rising speed reaches the average pressure recovery speed, and taking the time t as the optimal pumping period according to the oil field experience.
Based on the same inventive concept, embodiments of the present invention further provide an apparatus for determining a pumping cycle of a pumping well based on pressure recovery data, as described in the following embodiments. As the principle of the embodiment of the apparatus for solving the problem is similar to the method for determining the pumping cycle of the pumping well based on the pressure recovery data, the implementation of the embodiment of the apparatus can refer to the implementation of the method for determining the pumping cycle of the pumping well based on the pressure recovery data, and repeated details are not repeated.
Fig. 5 is a schematic diagram of an apparatus for determining a pumping cycle of a pumping well based on pressure recovery data according to an embodiment of the present invention, as shown in fig. 5, the apparatus includes: a pressure recovery data measurement module 51, a pressure recovery data processing module 52, a pressure recovery average velocity calculation module 53, and a pumping cycle determination module 54.
The pressure recovery data measuring module 51 is configured to obtain pressure recovery data of a pressure rise of a shaft in the pumping well after a pumping cycle is finished; the pressure recovery data processing module 52 is configured to determine, according to the pressure recovery data, a target time at which the pressure of the well bore in the pumped well reaches a stable state; the pressure recovery average speed calculation module 53 is used for calculating the pressure recovery average speed from the starting moment to the target moment of the well tube pressure in the pumping well; and a pumping period determining module 54, configured to determine a pumping period of the pumping well when the rising speed of the wellbore pressure in the pumping well reaches the pressure recovery average speed.
As can be seen from the above, in the apparatus for determining a pumping cycle of a pumping well based on pressure recovery data provided in the embodiment of the present invention, pressure recovery data of a pressure rise in a well shaft of the pumping well after a pumping cycle is completed is obtained by the pressure recovery data measuring module 51; determining the target moment when the pressure of the well cylinder in the pumping well reaches a stable state according to the measured pressure recovery data through the pressure recovery data processing module 52; calculating the average speed of pressure recovery from the starting moment to the target moment of the shaft pressure in the pumping well through a pressure recovery average speed calculation module 53; the moment when the rising speed of the well bore pressure in the pumping well reaches the pressure recovery average speed is obtained through the pumping period determining module 54, and the moment when the rising speed of the well bore pressure in the pumping well reaches the pressure recovery average speed is determined as the pumping period of the pumping well.
By the device for determining the pumping period of the pumping well based on the pressure recovery data, provided by the embodiment of the invention, the pumping period with reasonable time can be obtained, so that the phenomenon that fluid in the stratum is difficult to enter a shaft due to the overlong pumping period is avoided, the phenomenon that the pumping frequency is increased due to the overlong pumping period is avoided, the stratum is damaged, and the pumping cost is increased.
In one embodiment, the pressure recovery data processing module 52 is further configured to: acquiring a first rising speed corresponding to the well cylinder pressure in the pumping well at a first pressure recovery moment and a second rising speed corresponding to a second pressure recovery moment, wherein the first pressure recovery moment and the second pressure recovery moment are two adjacent pressure recovery moments in a pressure recovery period; calculating a speed difference value between the first rising speed and the second rising speed; and when the speed difference is smaller than or equal to the preset speed threshold, determining the first pressure recovery moment as a target moment when the shaft pressure in the pumping well reaches a stable state.
In one embodiment, the average speed of pressure recovery calculation module 53 is further configured to: acquiring pressure values of the well cylinder pressure in the pumping well at a starting moment and a target moment; calculating the pressure recovery speed of the well tube pressure in the pumping well at the target moment according to the pressure values of the well tube pressure in the pumping well at the starting moment and the target moment; and calculating the average pressure recovery speed from the starting time to the target time of the shaft pressure in the pumping well according to the pressure recovery speed of the shaft pressure in the pumping well at the target time by using an integral method.
In one embodiment, the above-mentioned pressure recovery data measurement module 51 is further configured to: and after the last pumping period is finished, descending the pressure gauge into the pumping well, and measuring pressure recovery data of the well bore pressure in the pumping well within a preset measuring time length.
Based on the same inventive concept, the embodiment of the present invention further provides a computer device, so as to solve the technical problem that the pumping cycle of a pumping well cannot be quantitatively determined in the prior art, so that the pumping cycle is too long, which easily causes that fluid in a formation is difficult to enter a wellbore, and the pumping cycle is too short, which causes an increase in pumping frequency and further damages the formation, fig. 6 is a schematic diagram of a computer device provided in the embodiment of the present invention, as shown in fig. 6, the computer device 60 includes a memory 601, a processor 602, and a computer program stored in the memory 601 and capable of running on the processor 602, and when the processor 602 executes the computer program, the method for determining the pumping cycle of the pumping well based on pressure recovery data is implemented.
Based on the same inventive concept, the embodiment of the invention further provides a computer readable storage medium for solving the technical problems that the pumping period of the pumping well cannot be determined quantitatively in the prior art, so that the pumping period is too long, the fluid in the stratum is difficult to enter a shaft, and the pumping period is too short, the pumping frequency is increased, and further the stratum is damaged.
In summary, embodiments of the present invention provide a method, an apparatus, a computer device, and a computer readable storage medium for determining a pumping cycle of a pumping well based on pressure recovery data, where the pressure recovery data generated by a rise in a liquid level in the pumping well is measured, a change condition of a wellbore pressure is analyzed, a pressure recovery average speed is calculated, and a time corresponding to the pressure recovery average speed is determined as the pumping cycle of the pumping well, so that a pumping cycle with a reasonable duration can be obtained, and thus, a situation that a fluid in a formation is difficult to enter the wellbore due to an excessively long pumping cycle is avoided, and a pumping frequency is increased due to an excessively short pumping cycle is avoided, thereby damaging the formation and increasing a pumping cost.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of determining a pumping cycle of a pumped well based on pressure recovery data, comprising:
acquiring pressure recovery data of the pressure rise of a shaft in the pumping well after the primary pumping period is finished;
determining the target moment when the shaft pressure in the pumping well reaches a stable state according to the pressure recovery data;
calculating the average speed of pressure recovery from the starting moment to the target moment of the well tube pressure in the pumping well;
and determining the moment when the rising speed of the shaft pressure in the pumping well reaches the pressure recovery average speed as the pumping period of the pumping well.
2. The method of claim 1, wherein determining a target time at which wellbore pressure in the dip well reaches steady state based on the pressure buildup data comprises:
acquiring a first rising speed corresponding to the well cylinder pressure in the pumping well at a first pressure recovery moment and a second rising speed corresponding to a second pressure recovery moment, wherein the first pressure recovery moment and the second pressure recovery moment are two adjacent pressure recovery moments in a pressure recovery period;
calculating a speed difference value between the first rising speed and the second rising speed;
and when the speed difference is smaller than or equal to a preset speed threshold value, determining the first pressure recovery moment as a target moment when the shaft pressure in the pumping well reaches a stable state.
3. The method of claim 1, wherein calculating an average rate of pressure recovery for wellbore pressure in the dip well from a start time to the target time comprises:
acquiring pressure values of the well cylinder pressure in the pumping well at the starting moment and the target moment;
calculating the pressure recovery speed of the shaft pressure in the pumping well at the target moment according to the pressure values of the shaft pressure in the pumping well at the starting moment and the target moment;
and calculating the average pressure recovery speed from the starting time to the target time of the well tube pressure in the pumping well according to the pressure recovery speed of the well tube pressure in the pumping well at the target time by using an integral method.
4. A method as claimed in any one of claims 1 to 3, wherein obtaining pressure recovery data for the increase in wellbore pressure in the swab well after the end of a swab cycle comprises:
and after the last pumping period is finished, descending the pressure gauge into the pumping well, and measuring pressure recovery data of the well bore pressure in the pumping well within a preset measuring time length.
5. An apparatus for determining a pumping cycle of a pumped well based on pressure recovery data, comprising:
the pressure recovery data measurement module is used for acquiring pressure recovery data of the pressure rise of a shaft in the pumping well after the completion of one pumping period;
the pressure recovery data processing module is used for determining the target moment when the shaft pressure in the pumping well reaches a stable state according to the pressure recovery data;
the pressure recovery average speed calculation module is used for calculating the pressure recovery average speed from the starting moment to the target moment of the well tube pressure in the pumping well;
and the pumping period determining module is used for determining the moment when the rising speed of the well barrel pressure in the pumping well reaches the pressure recovery average speed as the pumping period of the pumping well.
6. The apparatus of claim 5, wherein the pressure recovery data processing module is further to:
acquiring a first rising speed corresponding to the well cylinder pressure in the pumping well at a first pressure recovery moment and a second rising speed corresponding to a second pressure recovery moment, wherein the first pressure recovery moment and the second pressure recovery moment are two adjacent pressure recovery moments in a pressure recovery period;
calculating a speed difference value between the first rising speed and the second rising speed;
and when the speed difference is smaller than or equal to a preset speed threshold value, determining the first pressure recovery moment as a target moment when the shaft pressure in the pumping well reaches a stable state.
7. The apparatus of claim 5, wherein the average rate of buildup calculation module is further to:
acquiring pressure values of the well cylinder pressure in the pumping well at the starting moment and the target moment;
calculating the pressure recovery speed of the shaft pressure in the pumping well at the target moment according to the pressure values of the shaft pressure in the pumping well at the starting moment and the target moment;
and calculating the average pressure recovery speed from the starting time to the target time of the well tube pressure in the pumping well according to the pressure recovery speed of the well tube pressure in the pumping well at the target time by using an integral method.
8. The apparatus of any of claims 5 to 7, wherein the pressure recovery data measurement module is further to:
and after the last pumping period is finished, descending the pressure gauge into the pumping well, and measuring pressure recovery data of the well bore pressure in the pumping well within a preset measuring time length.
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 when executing the computer program implements the method of determining a pumping cycle of a pumped well based on pressure recovery data of any of claims 1 to 4.
10. A computer-readable storage medium having stored thereon a computer program for executing the method of any of claims 1-4 for determining a pumping cycle of a pumped well based on pressure recovery data.
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