Method for evaluating working state of oil fishing well and related equipment

Abstract

The invention provides an oil bailing well working state evaluation method and related equipment, and the method comprises the steps: monitoring the upper pressure and lower pressure of an oil bailing swab in real time in the process of lowering or lifting the oil bailing swab, so as to obtain pressure data; generating an indicator diagram of the oil fishing well based on the pressure data; based on the indicator diagram, the oil bailing state and the oil bailing effect of the oil bailing well are determined. The upper pressure and the lower pressure of the oil bailing swab are monitored in real time in the lowering or lifting process of the oil bailing swab; on the basis of the pressure data, an indicator diagram of the oil fishing well is generated; based on the indicator diagram, the oil bailing state and the oil bailing effect of the oil bailing well are determined, the working state of the oil bailing well is accurately judged by visually observing the change trend of the upper pressure and the lower pressure of the oil bailing pump along with the displacement of the oil bailing pump in the up-down reciprocating motion process and the image point location value, and oil bailing state parameters such as the liquid bailing amount are accurately calculated. And quantitative evaluation of the working state of the oil fishing well is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum well logging, and more specifically, to a method for evaluating the working state of an oil well, a device for evaluating the working state of an oil well, an electronic device and a storage medium. Background Art

[0002] The existing method for evaluating the working status of an oil recovery well is to observe the change in load data, determine the relative change in the height of the liquid column above the oil recovery pump, and then roughly determine the working status of the oil recovery well. It is impossible to accurately measure the oil recovery status parameters such as the amount of recovered liquid, and thus it is impossible to accurately evaluate the working status of the oil recovery well.

[0003] Therefore, a new technical solution is urgently needed to solve the above technical problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In a first aspect, the present invention proposes a method for evaluating the working status of an oil recovery well, comprising: during the process of lowering or lifting the oil recovery pump, real-time monitoring of the upper pressure and the lower pressure of the oil recovery pump to obtain pressure data; based on the pressure data, generating an indicator diagram of the oil recovery well; based on the indicator diagram, determining the oil recovery status and oil recovery effect of the oil recovery well.

[0006] Optionally, based on the dynamometer diagram, the oil recovery status and oil recovery effect of the oil recovery well are determined, including: determining the liquid level depth of the oil recovery well based on the downhole pressure curve in the dynamometer diagram; determining the oil recovery volume and water recovery volume at that time based on the liquid level depth and the size of the pipe string where the oil recovery pump is located; determining the oil recovery volume and water recovery volume at that time based on the oil recovery volume and water recovery volume; determining the water content of the single pumping liquid recovery volume based on the oil recovery volume and water recovery volume.

[0007] Optionally, the depth of the liquid level in the oil recovery well is determined based on the downhole pressure curve in the dynamometer diagram, including: determining the change in fluid density based on the change in the slope of the pressure curve; and determining the depth of the liquid level of each fluid based on the change in fluid density.

[0008] Optionally, based on the dynamometer diagram, determining the oil recovery state and oil recovery effect of the oil recovery well includes: determining the leakage situation during the oil recovery process based on the upper well pressure curve in the dynamometer diagram.

[0009] Optionally, based on the dynamometer diagram, determining the oil recovery state and oil recovery effect of the oil recovery well includes: determining the wellhead state of the oil recovery well based on the upper well pressure curve in the dynamometer diagram.

[0010] Optionally, the oil recovery state and oil recovery effect of the oil recovery well are determined based on the indicator diagram, including: determining the formation fluid supply capacity based on the change of the lower pressure curve of the oil recovery pump.

[0011] Optionally, an oil recovery performance diagram curve is generated based on pressure data obtained by multiple single extraction methods; corresponding to different fluid types in the oil recovery well, a theoretical performance diagram template is established based on the oil recovery performance diagram curve; a comparison result between the theoretical performance diagram template and the indicator diagram during the actual oil recovery process is obtained; when the comparison result meets preset conditions, the oil recovery status and oil recovery effect of the oil recovery well are determined based on the theoretical performance diagram template.

[0012] Secondly, a device for evaluating the working status of an oil recovery well is proposed, including: a data monitoring module, used to monitor the upper pressure and the lower pressure of the oil recovery pump in real time during the lowering or lifting of the oil recovery pump to obtain pressure data; a curve generation module, used to generate an indicator diagram of the oil recovery well based on the pressure data; an evaluation module, used to determine the oil recovery status and oil recovery effect of the oil recovery well based on the indicator diagram.

[0013] In a third aspect, an electronic device is also proposed, including a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the method for evaluating the working status of an oil well as described above is executed.

[0014] In a fourth aspect, a storage medium is also proposed, on which program instructions are stored, and the program instructions are used to execute the above-mentioned method for evaluating the working status of an oil well when running.

[0015] The method for evaluating the working status of an oil recovery well proposed in the present application monitors the upper pressure and the lower pressure of the oil recovery pump in real time during the process of lowering or raising the oil recovery pump; obtains pressure data, and generates an indicator diagram of the oil recovery well based on the pressure data; determines the oil recovery status and the oil recovery effect of the oil recovery well based on the indicator diagram, and realizes accurate judgment of the working status of the oil recovery well by intuitively observing the changing trend of the upper pressure and the lower pressure of the oil recovery pump during the up and down reciprocating motion of the oil recovery pump along with the displacement of the oil recovery pump and the image point value, and accurately calculates the oil recovery status parameters such as the amount of liquid recovered, thereby realizing quantitative evaluation of the working status of the oil recovery well.

[0016] The method for evaluating the working status of an oil well of the present invention, and other advantages, objectives and features of the present invention will be partially reflected in the following description, and will also be partially understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic flow chart of a method for evaluating the working status of an oil well according to an embodiment of the present invention is shown;

[0019] Figure 2 It shows a single oil extraction performance diagram according to one embodiment of the present invention;

[0020] Figure 3 It shows a double pumping oil servicing diagram according to one embodiment of the present invention;

[0021] Figure 4 A single oil extraction performance diagram according to another embodiment of the present invention is shown;

[0022] Figure 5 It shows a three-pump oil servicing diagram according to one embodiment of the present invention;

[0023] Figure 6 It shows a double pumping oil recovery diagram according to another embodiment of the present invention;

[0024] Figure 7 A schematic diagram of a theoretical work diagram template according to an embodiment of the present invention is shown;

[0025] Figure 8 A schematic block diagram of an oil well working status evaluation device according to an embodiment of the present invention is shown;

[0026] Fig. 9 A schematic block diagram of an electronic device according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0027] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0028] According to a first aspect of the present invention, the present invention provides a method for evaluating the working status of an oil well. Figure 1 A schematic flow chart of a method 100 for evaluating the working status of an oil well according to an embodiment of the present invention is shown. The method 100 may include the following steps:

[0029] Step S110, during the process of lowering or raising the oil pump, the upper pressure and the lower pressure of the oil pump are monitored in real time to obtain pressure data.

[0030] Exemplarily, the upper and lower parts of the oil recovery pump may be provided with pressure gauges respectively for realizing pressure measurement and obtaining pressure data. Specifically, the pressure data may include: monitoring data of the upper pressure of the oil recovery pump and monitoring data of the lower pressure of the oil recovery pump.

[0031] Step S120, generating a performance diagram of the oil well based on the pressure data.

[0032] For example, the dynamometer diagram of the oil recovery well can be formed by using the integrated oil recovery testing process to monitor the pressure profile data of the upper and lower pressures of the oil recovery pump as the oil recovery pump is raised and lowered.

[0033] Step S130, determining the oil recovery state and oil recovery effect of the oil recovery well based on the indicator diagram.

[0034] For example, the oil recovery status of the oil recovery well may include the following data: oil recovery volume, water recovery volume, water content of the recovery liquid volume, etc. The oil recovery effect may include the following contents: whether there is leakage during the oil recovery pumping process, the formation's ability to produce liquid, etc.

[0035] The method for evaluating the working status of an oil recovery well proposed in the present application monitors the upper pressure and the lower pressure of the oil recovery pump in real time during the process of lowering or raising the oil recovery pump; obtains pressure data, and generates an indicator diagram of the oil recovery well based on the pressure data; determines the oil recovery status and the oil recovery effect of the oil recovery well based on the indicator diagram, and realizes accurate judgment of the working status of the oil recovery well by intuitively observing the changing trend of the upper pressure and the lower pressure of the oil recovery pump during the up and down reciprocating motion of the oil recovery pump along with the displacement of the oil recovery pump and the image point value, and accurately calculates the oil recovery status parameters such as the amount of liquid recovered, thereby realizing quantitative evaluation of the working status of the oil recovery well.

[0036] In a feasible implementation, the oil recovery status and oil recovery effect of the oil recovery well are determined based on the dynamometer diagram, including: determining the liquid level depth of the oil recovery well based on the downhole pressure curve in the dynamometer diagram; determining the oil recovery volume and water recovery volume at that time based on the liquid level depth and the size of the pipe string where the oil recovery pump is located; determining the oil recovery volume and water recovery volume at that time based on the oil recovery volume and water recovery volume; determining the water content of the single pumping recovery volume based on the oil recovery volume and water recovery volume.

[0037] For example, Figure 2 FIG. 2 shows a single oil extraction performance diagram according to an embodiment of the present invention. Figure 2 It can be seen that the horizontal axis of the indicator diagram is the movement stroke of the oil pump, and the vertical axis is the pressure value measured by the pressure gauge, that is, the upper pressure value and the lower pressure value of the oil pump during the up and down reciprocating movement, as well as the depth value of the oil pump lowered can be intuitively read through the indicator diagram. It can be understood that the movement stroke of the oil pump is the relative distance between the oil pump and the wellhead during the lowering of the oil pump.

[0038] like Figure 2 As shown: Curve 1 is the test curve of the pressure gauge on the upper part of the drawer. Curve 2 is the test curve of the pressure gauge on the lower part of the drawer.

[0039] For example, the depth of the liquid level in the oil well can be determined by observing the image of the dynamometer diagram, and the depth of the liquid level in the oil well can be obtained by the horizontal coordinate corresponding to the inflection point of the gas-liquid interface through the oil pump. Figure 2 For example, the liquid depth of the oil well is 600 meters. Further, the oil depth of the oil well is 800 meters and the oil level is 200 meters according to the horizontal coordinate corresponding to the inflection point of the oil-water interface. When the oil well is 800-1000 meters deep, the liquid in the oil well is water.

[0040] Exemplarily, based on the liquid level depth and the size of the pipe string where the oil pump is located, the oil volume and water volume to be salvaged at that time can be determined by the following formula.

[0041] V i =C i H (1)

[0042] Among them, i is the number of times the oil pump completes a cycle of lowering and lifting. It can be understood that one cycle of lowering and lifting corresponds to a single pumping, V is the fluid volume, H is the liquid level depth of the oil or water being scooped up at that time, and C is the internal volume of the pipe column where the oil pump is located.

[0043] Specifically, the internal volume C of the column can be determined by looking up the volume comparison table 1 of the unit column.

[0044] Table 1

[0045]

[0046] Specifically, by Figure 2 It can be seen that during the stage of lowering the oil pump, Curve 1 and Curve 2 are basically coincident, and after the oil pump is lowered into the fluid, Curve 1 and Curve 2 form a pressure difference due to the depth difference between the upper and lower pressure gauges.

[0047] For example, when the oil recovery volume and water recovery volume have been determined by formula (1), the oil recovery amount and water recovery amount can be determined by the following formula:

[0048] Q i =ρ i V i (3)

[0049] Where ρ is the fluid density.

[0050] For example, when the amount of oil and water removed at the time is determined, the water content of the removed liquid can be determined by the following formula:

[0051]

[0052] Among them, S Wi is the water content of the i-th pumped liquid, Q Oi is the oil volume pumped out for the ith time, Q Wi is the amount of water pumped out for the ith time.

[0053] Therefore, the method for evaluating the working state of an oil recovery well proposed in the present application determines the liquid level depth of the oil recovery well based on the downhole pressure curve in the dynamometer diagram; determines the oil recovery volume and the water recovery volume at that time based on the liquid level depth and the size of the pipe string where the oil recovery pump is located; determines the oil recovery amount and the water recovery amount at that time based on the oil recovery volume and the water recovery volume at that time; determines the water content of the single pumping liquid recovery amount based on the oil recovery amount and the water recovery amount at that time, thereby realizing that the liquid level depth of the oil recovery well, the oil recovery volume and the water recovery volume at that time, and further the oil recovery amount and the water recovery amount of the oil recovery well can be determined based only on the image information in the dynamometer diagram, and finally the water content of the single pumping liquid recovery amount can be determined, thereby achieving accurate measurement of the oil recovery state parameters, and further realizing quantitative evaluation of the working state of the oil recovery well.

[0054] In a feasible implementation, the depth of the liquid level in the oil recovery well is determined based on the pressure curve in the well in the dynamometer diagram, including: determining the change in fluid density based on the change in the slope of the pressure curve; determining the liquid level depth of each fluid based on the change in fluid density.

[0055] Understandable, P. i =ρ i HkDJ i ,and then, Where g is a constant, which represents the gravity of an object with a mass of 1 kg, and can be taken as 9.8 N / kg. Therefore, the change in the slope of the pressure curve can roughly reflect the change in fluid density. Specifically, Figure 2 As shown in the figure, it can be seen from the pressure curve that the slope of the pressure curve changes when the oil pump passes through the gas-liquid interface from gas into oil and then passes through the oil-water interface from oil into water. Then, the point where the slope changes, i.e., the abscissa of the inflection point, can be used to determine whether the fluid type of the medium in which the oil pump is located has changed. Figure 2 For example, it can be concluded that the gas depth is 600 meters and the oil depth is 800 meters.

[0056] Therefore, the method for evaluating the working status of an oil well proposed in the present application determines the change in fluid density based on the change in the slope of the pressure curve; and determines the liquid level depth of each fluid based on the change in fluid density, thereby realizing that the liquid level depth of each fluid can be determined intuitively and quickly only by observing the inflection point of the indicator diagram image, that is, the horizontal coordinate of the inflection point position, thereby saving the step of determining the liquid level depth of the fluid.

[0057] In a feasible implementation, the oil recovery state and oil recovery effect of the oil recovery well are determined based on the dynamometer diagram, including: determining the leakage during the oil recovery process based on the well pressure curve in the dynamometer diagram.

[0058] For example, Figure 2 As shown in the figure, during the process of lifting the oil pump, the pressure value of curve 1 remains basically unchanged, which shows that the pressure on the upper part of the oil pump remains basically stable, that is, the liquid level height on the upper part of the pump does not change. Based on this, it can be seen that the oil pump fits tightly with the inner wall of the pipe string and there is basically no leakage.

[0059] Figure 3 FIG. 2 shows a double pumping oil recovery diagram according to an embodiment of the present invention. Figure 3As shown, curve 1 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=1; curve 2 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=1. Curve 3 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=2; curve 4 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=2. Figure 3 From the curves 1 and 3, it can be seen that the pressure on the upper part of the oil pump is decreasing during the oil recovery process, that is, the pressure on the upper part of the oil pump is decreasing. Therefore, it can be seen that the liquid level on the upper part of the oil pump is decreasing, that is, during the oil recovery process, there is a fluid channel between the oil pump and the inner wall of the pipe string, resulting in fluid loss during the oil recovery process.

[0060] It can be understood that the change in liquid level can be determined according to the change in pressure data on the upper part of the oil pump according to the liquid pressure formula, and then the change in liquid volume can be determined in combination with the internal volume of the pipe string, that is, the amount of lost liquid can be determined.

[0061] Therefore, the method for evaluating the working status of an oil recovery well proposed in the present application can determine the leakage during the oil recovery process only by observing the pressure value monitored at the upper part of the oil pump during the oil recovery process in the dynamometer diagram. It can intuitively and conveniently determine whether there is leakage during the oil recovery process, and further realize the rapid determination of the oil recovery effect.

[0062] In a feasible implementation, the oil recovery status and oil recovery effect of the oil recovery well are determined based on the dynamometer diagram, including: determining the wellhead status of the oil recovery well based on the upper well pressure curve in the dynamometer diagram.

[0063] For example, by Figure 2 It can be seen that from the liquid surface to the wellhead, Curve 1 shows a sudden rise, that is, during the rising process of the fluid, due to encountering the wellhead and the reduced aperture at the wellhead, a "water shock" effect occurs, which leads to a sudden rise in the pressure on the upper part of the oil recovery pump. After the sudden rise, due to the fluid entering the tank truck from the wellhead, Curve 1 shows a rapid downward trend, that is, the pressure data measured by the pressure gauge on the upper part of the oil recovery pump shows a rapid downward trend, and the height of the fluid on the upper part of the oil recovery pump decreases rapidly until the oil recovery pump is lifted to the wellhead and the depth returns to 0. Therefore, by observing the distortion point of Curve 1, the depth of the wellhead of the oil recovery well and the pressure value at the wellhead of the oil recovery well can be determined through the horizontal coordinate of the distortion point.

[0064] Therefore, the method for evaluating the working status of the oil recovery well proposed in the present application can determine the pressure value and depth value of the wellhead of the oil recovery well by observing the distortion points of the dynamometer curve, thereby achieving quantitative and qualitative evaluation of the status of the oil recovery well.

[0065] In a feasible implementation, the oil recovery state and oil recovery effect of the oil recovery well are determined based on the indicator diagram, including: determining the formation fluid supply capacity based on the change of the lower pressure curve of the oil recovery pump.

[0066] For example, by Figure 2 It can be seen that during the process of lifting the oil pump, curve 2 drops linearly and quickly drops to 0, that is, during the process of lifting the oil pump, since the pressure gauge at the bottom of the oil pump leaves the liquid surface, the pressure returns to 0 until the oil pump is lifted to the wellhead position. It can be seen that the formation's fluid supply capacity is weak and the formation energy replenishment is slow.

[0067] Figure 4 The single pumping oil recovery indicator diagram according to another embodiment of the present invention is shown, wherein curve 1 is the curve of the upper pressure of the oil recovery pump changing with the lowering depth of the oil recovery pump; curve 2 is the curve of the lower pressure of the oil recovery pump changing with the lowering depth of the oil recovery pump. Figure 4 It can be seen that during the process of the oil pump being lifted, curve 2 drops linearly to a certain value, then drops in an arc, and at a certain depth, the pressure value drops to 0 until it reaches the wellhead. It can be understood that during the process of the oil pump being lifted, the liquid level in the wellbore decreases, causing the wellbore pressure to decrease and liquid to come out of the formation, that is, there is energy replenishment in the formation.

[0068] Figure 5 FIG. 2 shows a three-pump oil recovery diagram according to an embodiment of the present invention. Figure 5 As shown, Curve 1 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=1; Curve 2 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=1. Curve 3 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=2; Curve 4 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=2; Curve 5 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=3; Curve 6 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=3. Among them, i is the number of times the oil pump completes a cycle of lowering and lifting. Given by Figure 5 It can be seen that during the process of lifting the oil pump, the pressure values ​​of curves 2, 4 and 6 dropped linearly and quickly dropped to 0. That is, during the process of lifting the oil pump, the pressure gauge at the bottom of the oil pump left the liquid surface and the pressure returned to 0 until the oil pump was lifted to the wellhead. It can be seen that the formation's fluid supply capacity is weak.

[0069] Figure 6 FIG. 2 shows a double pumping oil recovery diagram according to another embodiment of the present invention; Figure 6As shown, curve 1 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=1; curve 2 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=1. Curve 3 is the curve of the upper pressure of the oil pump changing with the lowering depth of the oil pump when i=2; curve 4 is the curve of the lower pressure of the oil pump changing with the lowering depth of the oil pump when i=2. Figure 6 It can be seen that when i=1, the pressure value of the lower part of the oil pump in curve 2 fluctuates after it drops to a certain level. This shows that there is a sudden energy replenishment in the formation during the lifting process. When i=2, the pressure value of the lower part of the oil pump drops linearly to a certain value, and then drops in an arc. After reaching a certain depth, it drops to 0 until it reaches the wellhead position. It can be seen that during the lifting process of the oil pump, the liquid level in the wellbore decreases, causing the formation to produce liquid after the wellbore pressure decreases, that is, there is energy replenishment in the formation.

[0070] Therefore, the present application can determine the strength of the formation fluid supply capacity by observing the changes in the lower pressure curve of the oil pump. When the lower pressure curve of the oil pump decreases in a straight line, it can be judged that the formation fluid capacity is weak; when the lower pressure curve of the oil pump decreases in an arc, it can be judged that the formation fluid supply capacity is strong; thereby achieving intuitive and efficient judgment of the formation fluid supply capacity.

[0071] In a feasible implementation, an oil recovery performance diagram curve is generated based on pressure data obtained by multiple single extraction methods; corresponding to different fluid types in the oil recovery well, a theoretical performance diagram template is established based on the oil recovery performance diagram curve; a comparison result between the theoretical performance diagram template and the indicator diagram during the actual oil recovery process is obtained; when the comparison result meets the preset conditions, the oil recovery state and oil recovery effect of the oil recovery well are determined based on the theoretical performance diagram template.

[0072] For example, Figure 7 FIG. 4 is a schematic diagram showing a theoretical work diagram template according to an embodiment of the present invention. Figure 7 As shown, the oil recovery performance diagram curve can be generated based on the pressure data obtained by the multiple single extraction methods as described above. Corresponding to different fluid types in the oil recovery well, based on the oil recovery performance diagram curve, a theoretical performance diagram template is established. Figure 7 It can be seen that the theoretical work diagram template can be established based on the oil recovery work diagram curves of pure water, pure oil, gas water, gas oil, gas, foam, oil, and gas, foam, oil, and water. It can be understood that Figure 7 The theoretical work diagram templates of the above different fluid types are only shown when the oil pump is closely matched with the inner wall of the pipe string. In the process of generating the theoretical work diagram template, there may be other problems such as Figure 3 The example of the case of leakage during the lifting and catching of oil is shown in FIG. For the sake of brevity, the theoretical work diagram template generated when the leakage occurs is not introduced in detail. A person skilled in the art can Figure 3 and Figure 7 Determine the theoretical work diagram template corresponding to the leakage in the process of lifting and catching oil. After determining the theoretical work diagram template, the actual oil recovery well work diagram can be generated according to the above method in the subsequent production process, and then the actual work diagram is compared with the theoretical work diagram template. If the comparison result shows that the similarity between the two is greater than a preset value such as 80%, 90%, etc., the oil recovery well can be processed accordingly according to the data contained in the theoretical work diagram template, which greatly improves the production efficiency.

[0073] According to a second aspect of the present invention, a device for evaluating the working status of an oil well is provided. Figure 8 FIG. 8 is a schematic block diagram of an oil well working status evaluation device 800 according to an embodiment of the present invention. Figure 8 As shown, the device 800 may include: a data monitoring module 810 , a curve generating module 820 , and an evaluation module 830 .

[0074] The data monitoring module 810 is used to monitor the upper pressure and the lower pressure of the oil scavenging pump in real time during the process of lowering or raising the oil scavenging pump to obtain pressure data.

[0075] The curve generating module 820 is used to generate a performance diagram of the oil recovery well based on the pressure data.

[0076] The evaluation module 830 is used to determine the oil recovery status and oil recovery effect of the oil recovery well based on the indicator diagram.

[0077] According to a third aspect of the present invention, an electronic device is also provided. Fig. 9 FIG. 8 is a schematic block diagram of an electronic device 900 according to an embodiment of the present invention. Fig. 9 As shown, the electronic device 900 includes a processor 910 and a memory 920, wherein the memory 920 stores computer program instructions, and when the computer program instructions are executed by the processor 910, they are used to execute the above-mentioned method for evaluating the working status of an oil well.

[0078] According to a fourth aspect of the present invention, a storage medium is also provided, on which program instructions are stored, and the program instructions are used to execute the above-mentioned oil well working status evaluation method when running. The storage medium may include, for example, a storage component of a tablet computer, a hard disk of a computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disk read-only memory (CD-ROM), a USB memory, or any combination of the above storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0079] A person skilled in the art may understand the specific details and beneficial effects of the oil well working status evaluation device, electronic device and storage medium by reading the above description of the oil well working status evaluation method, which will not be described here for brevity.

[0080] In the several embodiments provided in the present application, it should be understood that the disclosed devices and / or equipment can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0081] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0082] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0083] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for evaluating the working status of an oil well, characterized in that: include: During the process of lowering or lifting the oil pump, the upper pressure and the lower pressure of the oil pump are monitored in real time to obtain pressure data; Based on the pressure data, generating a dynamometer diagram of the oil well; Based on the indicator diagram, the oil recovery state and oil recovery effect of the oil recovery well are determined.

2. The method for evaluating the working status of an oil well according to claim 1, characterized in that: The step of determining the oil recovery state and oil recovery effect of the oil recovery well based on the indicator diagram includes: Determining the depth of the liquid level in the oil recovery well based on the downhole pressure curve in the dynamometer diagram; Determine the oil recovery volume and water recovery volume based on the liquid level depth and the size of the pipe column where the oil recovery pump is located; Determining the oil and water salvage volume at that time based on the oil and water salvage volume at that time; Based on the oil and water scavenged amounts at that time, the water content of the single pumped liquid amount is determined.

3. The method for evaluating the working status of an oil well according to claim 2, characterized in that: The step of determining the liquid level depth of the oil well based on the downhole pressure curve in the dynamometer diagram comprises: Determining a change in fluid density based on a change in the slope of the pressure curve; Based on the fluid density changes, the liquid level depth of each fluid is determined.

4. The method for evaluating the working status of an oil well according to claim 1, characterized in that: The step of determining the oil recovery state and oil recovery effect of the oil recovery well based on the indicator diagram includes: Based on the uplift well pressure curve in the dynamometer diagram, the leakage situation during the oil recovery process is determined.

5. The method for evaluating the working status of an oil well according to claim 1, characterized in that: The step of determining the oil recovery state and oil recovery effect of the oil recovery well based on the indicator diagram includes: Based on the upper well pressure curve in the dynamometer diagram, the wellhead status of the oil recovery well is determined.

6. The method for evaluating the working status of an oil well according to claim 1, characterized in that: The step of determining the oil recovery state and oil recovery effect of the oil recovery well based on the indicator diagram includes: The fluid supply capacity of the formation is determined based on the change of the lower pressure curve of the oil pump.

7. The method for evaluating the working status of an oil well according to any one of claims 1 to 6, characterized in that: The oil recovery performance diagram curve is generated based on the pressure data obtained by multiple single extraction methods; Corresponding to different fluid types in the oil recovery well, based on the oil recovery work diagram curve, a theoretical work diagram template is established; Obtaining a comparison result between the theoretical power diagram template and the power diagram during the actual oil recovery process; When the comparison result meets the preset conditions, the oil recovery state and oil recovery effect of the oil recovery well are determined based on the theoretical work diagram template.

8. An oil well working status evaluation device, characterized in that: include: A data monitoring module is used to monitor the upper pressure and the lower pressure of the oil scavenging pump in real time during the process of lowering or lifting the oil scavenging pump to obtain pressure data; A curve generating module, used for generating a dynamometer diagram of the oil well based on the pressure data; An evaluation module is used to determine the oil recovery status and oil recovery effect of the oil recovery well based on the indicator diagram.

9. An electronic device, characterized in that: The system comprises a processor and a memory, wherein the memory stores computer program instructions, and the computer program instructions are used to execute the method for evaluating the working status of an oil well according to any one of claims 1 to 7 when the processor is running.

10. A storage medium having program instructions stored thereon, wherein the program instructions are used to execute the method for evaluating the working status of an oil well according to any one of claims 1 to 7 when running.

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