CN109899051B

CN109899051B - Evaluation criterion determining method and device for oil well equipment and storage medium

Info

Publication number: CN109899051B
Application number: CN201711283835.2A
Authority: CN
Inventors: 陈锐; 韩岐清; 郑小雄; 韩涛
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2022-05-10
Anticipated expiration: 2037-12-07
Also published as: CN109899051A

Abstract

The invention discloses a method and a device for determining an evaluation standard of oil well equipment and a storage medium, and belongs to the technical field of oil wells. The method comprises the following steps: acquiring a plurality of technical indexes of target oil well equipment, wherein the technical indexes are determined from parameters of the target oil well equipment when a target oil well is mined, the target oil well is an oil well mined by the target oil well equipment, and the target oil well equipment is equipment to be evaluated currently; determining a target technical index from a plurality of technical indexes of the target oil well equipment through an analytic hierarchy process, wherein the target technical index is a technical index influencing the quality of the target oil well equipment; and determining the evaluation standard of the target oil well equipment based on the target technical index. The evaluation standard of the target oil well equipment can be determined based on the target technical indexes influencing the quality of the target oil well equipment, so that the evaluation standard is pointed, the accuracy of determining the evaluation standard is improved, and the accuracy of subsequently evaluating the target oil well equipment through the evaluation standard is ensured.

Description

Evaluation criterion determining method and device for oil well equipment and storage medium

Technical Field

The invention relates to the technical field of oil wells, in particular to a method and a device for determining an evaluation standard of oil well equipment and a storage medium.

Background

During well production, when the natural energy of the formation is insufficient to sustain downhole fluid flowing from the surface, fluid may be pumped to the surface by well equipment such as beam pumping units, ram lifts, gas lift, screw pumps, or electric submersible pumps. The technical indexes of the oil well equipment can reflect the oil well development benefit and the oil well management level, and meanwhile, the technical indexes are also the main basis for guiding the production decision and adjustment of the oil well. Therefore, in order to improve the production efficiency of the oil well, the technical index pair of the oil well equipment is generally required to be evaluated through an evaluation standard so as to determine the quality of the oil well equipment.

Currently, in determining an evaluation standard for evaluating a technical index of a target oil well equipment, it is generally required to acquire the technical index of each oil well equipment of each oil field company, then determine an average level of the acquired technical index, and determine the average level of the technical index as the evaluation standard. After that, the technical index of the target oil well equipment can be evaluated through the evaluation standard, so that the quality of the target oil well equipment can be determined.

However, since the working conditions of the oil wells of the oil well companies are different, the average level of the technical indexes of the oil well equipment of each oil field company is determined as the evaluation standard of the evaluation target oil well equipment, and the evaluation result is inaccurate due to no pertinence.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a storage medium for determining an evaluation standard of oil well equipment, which are used for solving the problem of inaccurate evaluation caused by no pertinence of the evaluation standard in the prior art. The technical scheme is as follows:

in one aspect, there is provided a method of determining an evaluation criterion of oil well equipment, the method including:

acquiring a plurality of technical indexes of target oil well equipment, wherein the technical indexes are determined from parameters of the target oil well equipment when a target oil well is mined, the target oil well is an oil well mined by the target oil well equipment, and the target oil well equipment is equipment to be evaluated currently;

determining a target technical index from a plurality of technical indexes of the target oil well equipment through an analytic hierarchy process, wherein the target technical index is a technical index influencing the quality of the target oil well equipment;

determining an evaluation criterion of the target well equipment based on the target technical indicator.

Optionally, said determining a target technical indicator from said plurality of technical indicators of said target oil well equipment by analytic hierarchy process comprises:

establishing a judgment matrix according to the technical indexes;

determining a weight value of each technical index in the plurality of technical indexes based on the judgment matrix;

and determining the technical index with the weight value larger than or equal to the preset weight as the target technical index.

Optionally, the establishing a determination matrix according to the plurality of technical indicators includes:

comparing any two technical indexes in the plurality of technical indexes according to a preset index important sequence;

determining a plurality of importance values for each of the plurality of technical indicators, the plurality of importance values indicating a degree of importance of the corresponding technical indicator compared to other technical indicators of the plurality of technical indicators;

and establishing a judgment matrix according to the plurality of important values of each technical index.

Optionally, the determining, based on the determination matrix, a weight value of each of the plurality of technical indicators includes:

determining an important average value of the plurality of important values of each technical index;

determining the sum of the important average values of a plurality of technical indexes;

and dividing the important average value of each technical index by the sum of the important average values to obtain the weight value of each technical index.

Optionally, the determining an evaluation criterion of the target well equipment based on the target technical indicator comprises:

determining an evaluation standard range, total weight distribution and weight coefficient corresponding to the target technical index from a preset technical index standard table;

and determining the evaluation standard range, the total weight and the weight coefficient corresponding to the target technical index as the evaluation standard of the target oil well equipment.

Optionally, before determining the evaluation criterion range corresponding to the target technical indicator from the preset technical indicator standard table, the method further includes:

after the target oil well is exploited through the target oil well equipment, determining a reference value of a specified technical index based on the parameters of the target oil well and the parameters of the target oil well equipment, wherein the specified technical index is a technical index needing a predetermined evaluation range in the preset technical index standard table;

and determining the evaluation standard range of the specified technical indexes in the preset technical index table based on the reference value of the specified technical indexes.

Optionally, after determining the evaluation criteria of the target oil well equipment based on the target technical indicator, the method further includes:

determining a technical value of the target technical indicator for the target oil well equipment;

determining a technical indicator score for the target well equipment based on the technical value of the target technical indicator for the target well equipment and the evaluation criteria;

determining a score range to which the technical index score of the target oil well equipment conforms;

and determining the grade of the target oil well equipment from the stored corresponding relation between the grade of the target oil well equipment and the grade of the target oil well equipment based on the score range of the target oil well equipment.

In another aspect, there is provided an evaluation criterion determining apparatus of oil well equipment, the apparatus including:

the system comprises an acquisition module, a storage module and a processing module, wherein the acquisition module is used for acquiring a plurality of technical indexes of target oil well equipment, the technical indexes are determined from parameters of the target oil well equipment when a target oil well is mined, the target oil well is an oil well mined by the target oil well equipment, and the target oil well equipment is equipment to be evaluated currently;

the first determination module is used for determining a target technical index from a plurality of technical indexes of the target oil well equipment through an analytic hierarchy process, wherein the target technical index is a technical index influencing the quality of the target oil well equipment;

a second determination module to determine an evaluation criterion of the target well equipment based on the target technical indicator.

Optionally, the first determining module includes:

the establishing submodule is used for establishing a judgment matrix according to the technical indexes;

the first determining submodule is used for determining the weight value of each technical index in the plurality of technical indexes based on the judging matrix;

and the second determining submodule is used for determining the technical index with the weight value larger than or equal to the preset weight as the target technical index.

Optionally, the establishing sub-module is configured to:

Optionally, the first determining submodule is configured to:

Optionally, the second determining module includes:

the third determining submodule is used for determining an evaluation standard range, total weight distribution and weight coefficients corresponding to the target technical indexes from a preset technical index standard table;

and the fourth determining submodule is used for determining the evaluation standard range, the total weight score and the weight coefficient corresponding to the target technical index as the evaluation standard of the target oil well equipment.

Optionally, the second determining module further includes:

a fifth determining submodule, configured to determine a reference value of a specified technical index based on the parameter of the target oil well and the parameter of the target oil well equipment after the target oil well is mined by the target oil well equipment, where the specified technical index is a technical index in the preset technical index standard table, where an evaluation range needs to be predetermined;

and the sixth determining submodule is used for determining the evaluation standard range of the specified technical indexes in the preset technical index table based on the reference value of the specified technical indexes.

Optionally, the apparatus further comprises:

a third determination module for determining a technical value of the target technical indicator for the target well equipment;

a fourth determination module for determining a technical indicator score for the target well equipment based on the technical value of the target technical indicator for the target well equipment and the evaluation criteria;

a fifth determination module for determining a score range to which the technical index score of the target oil well equipment conforms;

and the sixth determining module is used for determining the grade of the target oil well equipment from the stored corresponding relation between the grade of the target oil well equipment and the grade of the target oil well equipment based on the score range of the target oil well equipment.

In another aspect, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the steps of any of the methods provided in the first aspect above.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, after the plurality of technical indexes of the target oil well are obtained, the target technical index can be determined from the plurality of technical indexes through an analytic hierarchy process, and the evaluation standard of the target oil well equipment can be determined according to the target technical index. The target technical index is a technical index influencing the quality of the target oil well equipment, so that the evaluation standard determined based on the target technical index is an evaluation standard aiming at the target oil well equipment, the accuracy of determining the evaluation standard is improved, and the accuracy of subsequently evaluating the target oil well equipment through the evaluation standard is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of a method for determining evaluation criteria of an oil well equipment according to an embodiment of the present invention;

FIG. 2 is a flow chart of another method for determining evaluation criteria for well equipment according to an embodiment of the present invention;

fig. 3A is a block diagram of an evaluation criterion determining apparatus of an oil well equipment according to an embodiment of the present invention;

FIG. 3B is a block diagram of a first determining module according to an embodiment of the invention;

FIG. 3C is a block diagram of a second determination module provided by embodiments of the present invention;

FIG. 3D is a block diagram of another second determination module provided by embodiments of the invention;

FIG. 3E is a block diagram of another evaluation criterion determining apparatus for oil well equipment according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before explaining the embodiments of the present invention in detail, an application scenario related to the embodiments of the present invention is explained.

At present, the technical indexes of oil well equipment can reflect the oil well development benefit and the oil well management level, and meanwhile, the technical indexes are also the main basis for guiding the production decision and adjustment of an oil well. Therefore, in the oil well production process, the technical indexes of the oil well equipment are generally required to be evaluated through evaluation criteria. However, the current evaluation standard is determined by averaging the technical indexes of the oil well equipment of each oil field company, and the working conditions of the oil wells of each oil field company are different, so that the technical indexes of the oil well equipment are different. Therefore, the average level of the technical indexes of the oil well equipment of each oil field company is determined as an evaluation standard, and the evaluation standard is not targeted, so that the subsequent evaluation result is inaccurate.

Based on the scene, the embodiment of the invention provides the evaluation marking determination method of the oil well equipment, which has pertinence and can improve the evaluation accuracy.

After the application scenario of the embodiment of the present invention is described, the method for determining the evaluation criterion of the oil well equipment according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Step 101: the method comprises the steps of obtaining a plurality of technical indexes of target oil well equipment, wherein the technical indexes are determined from parameters of the target oil well equipment when a target oil well is mined, the target oil well is an oil well mined by the target oil well equipment, and the target oil well equipment is equipment to be evaluated currently.

Step 102: and determining a target technical index from the technical indexes of the target oil well equipment through an analytic hierarchy process, wherein the target technical index is a technical index influencing the quality of the target oil well equipment.

Step 103: and determining the evaluation standard of the target oil well equipment based on the target technical index.

In the embodiment of the invention, after the plurality of technical indexes of the target oil well are obtained, the target technical index can be determined from the plurality of technical indexes through an analytic hierarchy process, and the evaluation standard of the target oil well equipment can be determined according to the target technical index. The target technical index is a technical index which influences the quality of the target oil well equipment, so that the evaluation standard determined based on the target technical index is an evaluation standard for the target oil well equipment, the accuracy of determining the evaluation standard is improved, and the accuracy of evaluating the target oil well equipment through the evaluation standard in the follow-up process is ensured.

Optionally, determining a target technical indicator from the plurality of technical indicators of the target well equipment by an analytic hierarchy process, comprising:

establishing a judgment matrix according to the technical indexes;

Optionally, establishing a determination matrix according to the plurality of technical indicators includes:

Optionally, determining, based on the determination matrix, a weight value of each of the plurality of technical indicators includes:

Optionally, determining an evaluation criterion of the target oil well equipment based on the target technical index comprises:

Optionally, before determining the evaluation criterion range corresponding to the target technical index from the preset technical index standard table, the method further includes:

after the target oil well is mined through the target oil well equipment, determining a reference value of a specified technical index based on the parameters of the target oil well and the parameters of the target oil well equipment, wherein the specified technical index is a technical index needing to determine an evaluation range in advance in the preset technical index standard table;

and determining the evaluation standard range of the specified technical index in the preset technical index table based on the reference value of the specified technical index.

determining a technical value of the target technical index of the target oil well equipment;

determining a technical index score of the target oil well equipment based on the technical value of the target technical index of the target oil well equipment and the evaluation criterion;

determining a score range which accords with the technical index score of the target oil well equipment;

All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present invention, which is not described in detail herein.

Fig. 2 is a flowchart illustrating a method for determining evaluation criteria of oil well equipment according to an exemplary embodiment, and the embodiment of the present invention will be explained in detail with reference to fig. 2 in the above-described embodiment shown in fig. 1, and with reference to fig. 2, the method specifically includes the following steps.

Step 201: the method comprises the steps that a terminal obtains a plurality of technical indexes of target oil well equipment, the technical indexes are obtained by determining from parameters of the target oil well equipment when a target oil well is mined, the target oil well is an oil well which is mined through the target oil well equipment, and the target oil well equipment is equipment to be evaluated currently.

It should be noted that the parameters of the target oil well equipment may include specification parameters and operation parameters, the specification parameters refer to parameters that the target oil well equipment can produce the conditions that are met by the target oil well, and the specification parameters may include: pump hang depth, liquid discharge capacity, maximum well inclination angle, maximum full angle change rate, pump hang point well inclination, full angle change rate, crude oil viscosity, sand content, median formation sand particle size, critical sand carrying flow, gas-liquid ratio and the like. The operation parameters refer to parameters generated by the target oil well equipment in the process of producing the target oil well, and the operation parameters can comprise: system efficiency, displacement efficiency, pump cycle, torque utilization, motor power utilization, hectometer liquid power consumption, and the like.

The terminal may obtain all specification parameters and all operation parameters of the target oil well equipment, or may obtain some parameters, for example, only obtain specification parameters of the target oil well equipment, or only obtain operation parameters of the target oil well equipment. However, since the parameters of the target well equipment have different degrees of influence on the quality of the target well equipment, the terminal generally needs to acquire all specification parameters and all operation parameters of the target well equipment in order to avoid missing parameters having a large degree of influence.

In addition, the terminal can determine the parameters of the target oil well equipment through the detection equipment in the process that the target oil well equipment is used for exploiting the target oil well, can also obtain the parameters of the oil well equipment with the same type as the target oil well equipment in the historical record during oil well exploitation, and determines the obtained parameters as the parameters of the target oil well equipment.

Step 202: and the terminal determines a target technical index from the technical indexes of the target oil well equipment through an analytic hierarchy process, wherein the target technical index is a technical index influencing the quality of the target oil well equipment.

Because some technical indexes in the plurality of technical indexes acquired by the terminal have little or no influence on the quality of target oil well equipment; some technical indexes may have a large influence on the quality of target oil well equipment, and the larger influence indicates that the technical indexes are more important for the target oil well equipment. Therefore, in order to improve the accuracy of subsequent evaluation of the target oil well equipment, the terminal can determine the target technical index from a plurality of technical indexes of the target oil well equipment through the analytic hierarchy process. And the operation of the terminal for determining the target technical index from the plurality of technical indexes of the target oil well equipment through the analytic hierarchy process can be as follows: establishing a judgment matrix according to the technical indexes; determining a weight value of each technical index in the plurality of technical indexes based on the judgment matrix; and determining the technical index with the weight value larger than or equal to the preset weight as the target technical index.

The operation of the terminal for establishing the judgment matrix according to the plurality of technical indexes may be: comparing any two technical indexes in the plurality of technical indexes according to a preset index important sequence; determining a plurality of importance values for each of the plurality of technical indicators, the plurality of importance values indicating a degree of importance of the corresponding technical indicator compared to other technical indicators of the plurality of technical indicators; and establishing a judgment matrix according to a plurality of important values of each technical index.

When the terminal establishes the judgment matrix according to the plurality of important values of each technical index, the plurality of important values of each technical index can be determined as a row of elements of the judgment matrix, and each row of elements in the judgment matrix is an important value determined by comparing the importance degree of a plurality of technical indexes respectively corresponding to a plurality of rows of elements with the importance degree of the same technical index.

It should be noted that the preset index importance order is used to describe the importance degree of the technical indexes of the target oil well equipment, and the preset importance order may be set in advance, for example, the order of importance of the preset index importance order from important to unimportant may be as shown in table 1.

TABLE 1

Technical index	Degree of importance
		System efficiency, displacement efficiency, pump cycle	Degree of importance of one level
Torque utilization rate and motor power utilization rate	Degree of importance of two
		Hectometer liquid power consumption	Degree of importance of three levels
Depth of pump hanging and liquid discharge capacity	Degree of importance four
		Maximum angle of inclination	Importance degree five grade
......	......

In the embodiments of the present invention, only the important order of the preset indexes shown in table 1 is taken as an example for description, and the embodiments of the present invention are not limited thereto.

In addition, when the terminal determines a plurality of importance values of each technical index in the plurality of technical indexes, the terminal may determine a sequence difference between each technical index and other technical indexes according to the sequence of each technical index in a preset index importance sequence, and when the sequence difference is a sequence difference of a technical index with a high degree of importance relative to a technical index with a low degree of importance, the sequence difference is a positive number, and when the sequence difference is a sequence difference of a technical index with a low degree of importance relative to a technical index with a high degree of importance, the sequence difference is a negative number; and determining the sequential difference between each technical index and other technical indexes as the importance degree difference between each technical index and other technical indexes, and determining a plurality of importance values of each technical index from the corresponding relationship between preset importance degree differences and importance values.

For example, when the plurality of technical indexes acquired by the terminal are system efficiency, pump detection period, torque utilization rate, and pump hanging depth, as can be seen from table 1, system efficiency is equally important, system efficiency is 1 level more important than torque utilization rate, and system efficiency is 3 levels more important than pump hanging depth. Therefore, the terminal can determine the plurality of importance values of the system efficiency to be 1, 2, and 4, respectively, from the correspondence between the importance level difference and the importance value shown in table 2.

TABLE 2

Poor degree of importance	Importance value
		Level 0 (equally important)	1
Level 1	2
		Stage 2	3
Grade 3	4
		......	......
-level 1	1/2
		-2 stage	1/3
......	......

In the embodiments of the present invention, only the correspondence between the importance level difference and the importance value shown in table 2 is used as an example, and the embodiments of the present invention are not limited thereto.

In addition, after the terminal establishes the judgment matrix, the important average value of a plurality of important values of each technical index can be determined, and the sum of the important average values of the technical indexes is determined; and dividing the important average value of each technical index by the sum of the important average values to obtain the weight value of each technical index.

Since each row of elements in the judgment matrix is a plurality of important values of one technical index, the terminal determines an important average value of the plurality of important values of each technical index, namely an average value of a plurality of elements in each row of the judgment matrix. Specifically, when determining an important average value of a technical index, the terminal may multiply a row of elements corresponding to the technical index in the determination matrix, and obtain a result with a root number a, where a is the number of the row of elements, and the result with the root number a is the important average value of a plurality of important values of the technical index.

It should be noted that the preset weight may be set in advance, for example, the preset weight may be given as 0.5, 0.4, and so on.

Furthermore, in the embodiment of the present invention, since the importance degree of the technical index determined by the terminal from the specification parameters of the target oil well equipment is lower than the importance degree of the technical index determined from the operation parameters, the accuracy of the target technical index determined by one judgment matrix may be lower, and therefore, in general, in order to improve the accuracy of determining the target technical index, the terminal may determine two judgment matrices. That is, after the terminal determines a part of technical indexes from the specification parameters of the target oil well equipment, a judgment matrix is determined according to the part of technical indexes, and meanwhile, after the terminal determines another part of technical indexes from the operation parameters of the target oil well equipment, the terminal determines another judgment matrix according to the part of technical indexes.

For example, the technical indexes determined by the terminal from the specification parameters of the target oil well equipment are respectively as follows: pumping depth, liquid discharge capacity, maximum well inclination angle, maximum full angle change rate, pumping point well inclination, full angle change rate, crude oil viscosity, sand content, median formation sand particle size and critical sand carrying flow rate, wherein X is used respectively₁-X₁₀It is shown that a plurality of importance values of each specification are determined as shown in table 3 below, and then a decision matrix is established according to the plurality of importance values of each specification as shown in table 3. The technical indexes determined by the terminal from the operation parameters of the target oil well equipment are respectively as follows: system efficiency, displacement efficiency, pump cycle, torque utilization, motor power utilization, and hectometer liquid power consumption, and using Y₁-Y₁₀It is shown that the determined plurality of importance values of each technical index may be as shown in table 4 below, and then another decision matrix is established according to the plurality of importance values of each technical index shown in table 4.

TABLE 3

TABLE 4

After the terminal determines the two judgment matrices, the two judgment matrices are two separate matrices (for convenience of description, the two judgment matrices are respectively referred to as a specification judgment matrix and an operation judgment matrix), and the terminal may respectively determine a weight value corresponding to each technical index in each judgment matrix. That is, after the terminal establishes the specification judgment matrix based on the technical indexes determined from the specification parameters of the target oil well equipment and establishes the operation judgment inverse matrix based on the technical indexes determined from the operation parameters of the target oil well equipment, the important average value of a plurality of important values of each technical index in the specification judgment matrix can be determined, and the sum of the important average values of the plurality of technical indexes in the specification judgment matrix can be determined; and dividing the important average value of each technical index in the specification judgment matrix by the sum of the important average values to obtain the weight value of each technical index in the specification judgment matrix. Meanwhile, the terminal can determine the important average value of a plurality of important values of each technical index in the operation judgment matrix and determine the sum of the important average values of the technical indexes in the operation judgment matrix; and dividing the important average value of each technical index in the operation judgment matrix by the sum of the important average values to obtain the weight value of each technical index in the operation judgment matrix.

It should be noted that, because the terminal may establish one judgment matrix according to the plurality of technical indicators, or may establish two judgment matrices, the preset weight preset by the terminal may be one weight or two weights, and the two preset weights respectively correspond to one judgment matrix. In addition, the importance degree of the technical indexes determined by the terminal from the specification parameters of the target oil well equipment is lower than that of the technical indexes determined by the operation parameters, and the importance degree of the specification judgment matrix established by the terminal is lower than that of the operation judgment matrix, so that the two preset weights are different from each other in order to improve the accuracy of determining the target technical standard.

Step 203: and the terminal determines the evaluation standard of the target oil well equipment based on the target technical index.

Since the target technical index is a technical index affecting the quality of the target oil well equipment, in order to improve the accuracy and pertinence of determining the evaluation standard, the terminal may determine the evaluation standard of the target oil well equipment based on the target technical index. And the operation of the terminal for determining the evaluation standard of the target oil well equipment based on the target technical index can be as follows: determining an evaluation standard range, total weight distribution and weight coefficient corresponding to the target technical index from a preset technical index standard table; and determining the evaluation standard range, the total weight and the weight coefficient corresponding to the target technical index as the evaluation standard of the target oil well equipment.

In addition, because some evaluation standard ranges of technical indexes in the preset technical index standard table are related to the technical values of the parameters of the current target oil well equipment, after the terminal produces the target oil well through the target oil well equipment, a reference value of a specified technical index can be determined based on the parameters of the target oil well and the parameters of the target oil well equipment, and the specified technical index is the technical index needing to be determined in the preset technical index standard table in advance; and determining the evaluation standard range of the specified technical index in the preset technical index table based on the reference value of the specified technical index.

It should be noted that the specified specification is generally fixed, and may be, for example, pump cycle, displacement efficiency, system efficiency, one hundred meters of liquid power consumption, and the like.

It should be noted that, when the terminal determines the reference value of the specified technical index, the terminal may acquire the parameter of the target oil well and the parameter of the target oil well equipment. The parameters of the target oil well can be stored in planning of exploitation of the target oil well, so that the stored parameters of the target oil well can be directly obtained when the terminal needs to obtain the parameters of the target oil well. In addition, the terminal determines the reference value of the designated technical index, the target oil well equipment is put into use, and part of parameters of the target oil well equipment, such as specification parameters and corresponding technical values, the set period of evaluating the target oil well equipment and the like, can be stored in the terminal in advance. For the parameters which cannot be stored in advance, the terminal can detect the technical values of the parameters generated in the process of exploiting the target oil well by the detection equipment, so that when the terminal needs to acquire the parameters of the target oil well, the terminal can directly acquire part of the stored parameters of the target oil well and acquire the other part of the parameters of the target oil well by the detection equipment.

When the specified technical index comprises a pump detection period, the parameters of the target oil well determined by the terminal comprise: one-time production input cost V of target oil well and cost price V of crude oil_oDaily maintenance cost V for single well_{Operation maintenance}Cost V for replacing rod pipe in pump inspection operation_{Rod and tube replacement}Electric charge V for oil well production consumption_{Daily electricity consumption fee}Other expenses in the production run of the oil well V_OthersAnd the determined parameters of the target oil well equipment comprise: daily oil yield T and one-time pump detection operation cost V_{Detection of}Average pump detection period d, evaluation period M, and the like. The terminal can determine the reference value D of the pump detection period by the following formula (1).

In addition, when the specified technical indicator includes displacement efficiency, the parameters of the target well of the terminal include: water content f of target oil well_wCrude oil volume coefficient B₀Volume coefficient of formation water B_wProducing a gas-oil ratio R_PDissolved gas-oil ratio R under pump submergence pressure_sGas compression factor Z, etc., the determined parameters of the target well equipment include: temperature T of fluid at suction inlet of pump_pSurface condition fluid temperature T_roPump sinking pressure P_{Sink with a metal plate}And the like. The terminal may determine the reference value K of the displacement efficiency by the following formula (2).

Furthermore, when the specified technical indicator comprises system efficiency, the parameters of the target oil well determined by the terminal comprise: working fluid level H, etc., the parameters of the target well equipment determined include: daily liquid yield Q and oil pressure P_OilSleeve pressure P_SleeveDaily power consumption W, liquid density ρ of the liquid in the target oil well, gravitational acceleration g, and the like. The terminal can determine the reference value N of the system efficiency by the following formula (3).

It should be noted that, after the terminal determines the reference value of the specified technical index, the terminal may determine the identifier corresponding to the reference value of the specified technical index in the preset technical index table, and replace the corresponding identifier with the reference value of the specified technical index, thereby determining the evaluation standard range of the specified technical index.

In addition, the preset specification standard table may be set in advance, for example, the preset specification standard table may be as shown in table 5 below. In table 5, D represents a reference value of the pump cycle, K represents a reference value of the displacement efficiency, N represents a reference value of the system efficiency, and X represents a reference value of the liquid-electricity consumption amount of one hundred meters.

TABLE 5

In the embodiments of the present invention, the description is made only by taking the preset technical index standard table shown in table 5 as an example, and the embodiments of the present invention are not limited thereto.

Further, the terminal may evaluate the technical index of the target well equipment through the evaluation criterion after determining the evaluation criterion of the target well equipment based on the target technical index to determine the grade of the target well equipment.

Specifically, the terminal can determine the technical value of the target technical index of the target oil well equipment; determining the technical index score of the target oil well equipment based on the technical value and the evaluation standard of the target technical index of the target oil well equipment; determining a score range which accords with the technical index score of the target oil well equipment; and determining the grade of the target oil well equipment from the stored corresponding relation between the grade of the target oil well equipment and the grade of the target oil well equipment based on the score range of the target oil well equipment.

When the technical index of the target oil well equipment is evaluated, the target oil well equipment is put into use, and the terminal can detect the parameters of the target oil well equipment in the process of exploiting the target oil well through the detection equipment, so that the terminal can directly determine the technical value of the target technical index according to the detection equipment. Since the target oil well equipment may generally include a plurality of target technical indicators, the terminal may compare the technical value of each target technical indicator with the corresponding evaluation standard range to determine the evaluation standard range to which the technical value of the target technical indicator belongs; then, the terminal can determine the corresponding total weight and the weight coefficient according to the evaluation standard range to which the technical value of the target technical index belongs, and determine the weight fraction of the technical value of the target technical index; and adding the weight scores of all the target technical indexes to obtain the technical index score of the target oil well equipment.

In addition, a plurality of score ranges may be included in the correspondence between the score range and the good/bad grade stored in the terminal, and therefore, the terminal may compare the technical index score with the plurality of score ranges to determine a score range of the technical index score of the target oil well equipment, and determine the good/bad grade of the target oil well equipment from the correspondence between the score range and the good/bad grade.

For example, the technical values of the plurality of target technical indicators determined by the terminal through the detection device are respectively: pump detection period of 801 days, displacement efficiency of 51.5%, system efficiency of 30.2%, torque utilization rate of 78%, motor power utilization rate of 41%, one hundred meters of liquid power consumption of 1.45(KW h/100m t), pump hanging depth of 1700 meters, and liquid discharge capacity of 34 (meters)³Per ton), maximum inclination angle 3.5 degrees and maximum total angle change rate 0.8 degrees/30 meters. The technical index score of the target oil well equipment is determined to be 79 points by the technical value of the target technical index and the evaluation criteria shown in the above table 5, and the grade of goodness of the target oil well equipment is determined to be middle from the corresponding relationship between the score range and the grade of goodness shown in the table 6.

TABLE 6

Fractional range	＞90	80～90	70～80	＜70
					Grade of quality	Superior food	Good wine	In (1)	Difference (D)

In addition, when the terminal determines that the grade of the target oil well equipment is less than or equal to the preset grade, prompt information can be displayed, and the prompt information can prompt a worker to optimize the target oil well equipment. The preset level may be set in advance, for example, the preset level may be good, medium, bad, or the like.

In the embodiment of the invention, after acquiring the plurality of technical indexes of the target oil well, the terminal can determine the target technical index from the plurality of technical indexes through an analytic hierarchy process, and determine the evaluation standard of the target oil well equipment according to the target technical index. The target technical index is a technical index influencing the quality of the target oil well equipment, so that the evaluation standard determined by the terminal based on the target technical index is an evaluation standard aiming at the target oil well equipment, the accuracy of determining the evaluation standard is improved, and the accuracy of subsequently evaluating the target oil well equipment through the evaluation standard is ensured. Meanwhile, after the terminal evaluates the target oil well equipment, if the grade of the target oil well equipment is low, the terminal can also display prompt information to prompt the optimization of the target oil well equipment, so that the subsequent efficiency of target oil well exploitation is improved.

After explaining the evaluation criterion determining method for an oil well equipment according to an embodiment of the present invention, an evaluation criterion determining apparatus for an oil well equipment according to the present invention will be described.

Fig. 3A is a block diagram of an evaluation criterion determining apparatus for an oil well equipment according to an embodiment of the present invention, and referring to fig. 3A, the evaluation criterion determining apparatus for an oil well equipment may be implemented by software, hardware, or a combination of both. The device includes: an acquisition module 301, a first determination module 302, and a second determination module 303.

The acquiring module 301 is configured to acquire a plurality of technical indexes of a target oil well device, where the technical indexes are determined from parameters of the target oil well device when a target oil well is mined, the target oil well is an oil well mined by the target oil well device, and the target oil well device is a device to be currently evaluated;

a first determining module 302, configured to determine a target technical indicator from a plurality of technical indicators of the target oil well equipment through an analytic hierarchy process, where the target technical indicator is a technical indicator affecting the quality of the target oil well equipment;

a second determining module 303, configured to determine an evaluation criterion of the target oil well equipment based on the target technical indicator.

Optionally, referring to fig. 3B, the first determining module 302 includes:

the establishing submodule 3021 is configured to establish a determination matrix according to the plurality of technical indicators;

a first determining submodule 3022, configured to determine a weight value of each of the plurality of technical indicators based on the determination matrix;

the second determining submodule 3023 is configured to determine, as the target technical indicator, a technical indicator with a weight value greater than or equal to a preset weight.

Optionally, the establishing submodule 3021 is configured to:

Optionally, the first determining submodule 3022 is configured to:

Optionally, referring to fig. 3C, the second determining module 303 includes:

a third determining submodule 3031, configured to determine, from a preset technical index standard table, an evaluation standard range, a total weight score, and a weight coefficient corresponding to the target technical index;

and a fourth determining submodule 3032, configured to determine the evaluation standard range, the total weight score, and the weight coefficient corresponding to the target technical indicator as the evaluation standard of the target oil well equipment.

Optionally, referring to fig. 3D, the second determining module 303 further includes:

a fifth determining submodule 3033, configured to determine, after the target oil well is exploited by the target oil well equipment, a reference value of a specified technical index based on the parameter of the target oil well and the parameter of the target oil well equipment, where the specified technical index is a technical index in the preset technical index standard table, where an evaluation range needs to be predetermined;

a sixth determining submodule 3034, configured to determine, based on the reference value of the specified technical indicator, an evaluation criterion range of the specified technical indicator in the preset technical indicator table.

Optionally, referring to fig. 3E, the apparatus further comprises:

a third determination module 304 for determining a technical value of the target technical indicator for the target well equipment;

a fourth determination module 305 for determining a technical indicator score for the target well equipment based on the technical value of the target technical indicator for the target well equipment and the evaluation criteria;

a fifth determination module 306 for determining a range of scores to which the technical indicator score of the target oil well equipment meets;

a sixth determining module 307, configured to determine, based on the score range of the target oil well equipment, a quality level of the target oil well equipment from the stored correspondence between the score range and the quality level.

In summary, in the embodiment of the present invention, after acquiring a plurality of technical indexes of a target oil well, a terminal may determine a target technical index from the plurality of technical indexes by an analytic hierarchy process, and determine an evaluation criterion of a target oil well device according to the target technical index. The target technical index is a technical index influencing the quality of the target oil well equipment, so that the evaluation standard determined by the terminal based on the target technical index is an evaluation standard aiming at the target oil well equipment, the accuracy of determining the evaluation standard is improved, and the accuracy of subsequently evaluating the target oil well equipment through the evaluation standard is ensured. Meanwhile, after the terminal evaluates the target oil well equipment, if the grade of the target oil well equipment is low, the terminal can also display prompt information to prompt the optimization of the target oil well equipment, so that the subsequent efficiency of target oil well exploitation is improved.

It should be noted that: the evaluation criterion determining device for oil well equipment provided in the above embodiment is only illustrated by the division of the above function modules when determining the evaluation criterion for oil well equipment, and in practical application, the above function distribution may be completed by different function modules according to needs, that is, the internal structure of the device is divided into different function modules to complete all or part of the above described functions. In addition, the evaluation criterion determining device of the oil well equipment provided by the embodiment and the evaluation criterion determining method of the oil well equipment belong to the same concept, and the specific implementation process is detailed in the method embodiment and is not described again.

Fig. 4 shows a block diagram of a terminal 400 according to an exemplary embodiment of the present invention. The terminal 400 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion Picture Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion Picture Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The terminal 400 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.

Generally, the terminal 400 includes: a processor 401 and a memory 402.

Processor 401 may include one or more processing cores such as a 4-core processor, an 8-core processor, and the like. The processor 401 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable logic Array). The processor 401 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 401 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 401 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 402 may include one or more computer-readable storage media, which may be non-transitory. Memory 402 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is used to store at least one instruction for execution by processor 401 to implement the evaluation criteria determination method for well equipment provided by the method embodiments herein.

In some embodiments, the terminal 400 may further optionally include: a peripheral interface 403 and at least one peripheral. The processor 401, memory 402 and peripheral interface 403 may be connected by bus or signal lines. Various peripheral devices may be connected to the peripheral interface 403 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of radio frequency circuitry 404, touch screen display 405, camera 406, audio circuitry 407, positioning components 408, and power supply 409.

The peripheral interface 403 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 401 and the memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402 and the peripheral interface 403 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 404 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 404 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 404 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 404 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display screen 405 is used to display a UI (user interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 405 is a touch display screen, the display screen 405 also has the ability to capture touch signals on or above the surface of the display screen 405. The touch signal may be input to the processor 401 as a control signal for processing. At this point, the display screen 405 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 405 may be one, providing the front panel of the terminal 400; in other embodiments, the display screen 405 may be at least two, respectively disposed on different surfaces of the terminal 400 or in a folded design; in still other embodiments, the display 405 may be a flexible display disposed on a curved surface or a folded surface of the terminal 400. Even further, the display screen 405 may be arranged in a non-rectangular irregular pattern, i.e. a shaped screen. The Display screen 405 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 401 for processing, or inputting the electric signals to the radio frequency circuit 404 for realizing voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 400. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 407 may also include a headphone jack.

The positioning component 408 is used to locate the current geographic position of the terminal 400 for navigation or LBS (Location Based Service). The Positioning component 408 can be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.

The power supply 409 is used to supply power to the various components in the terminal 400. The power source 409 may be alternating current, direct current, disposable or rechargeable. When the power source 409 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery can also be used to support fast charge technology.

In some embodiments, the terminal 400 also includes one or more sensors 410. The one or more sensors 410 include, but are not limited to: acceleration sensor 411, gyro sensor 412, pressure sensor 413, fingerprint sensor 414, optical sensor 415, and proximity sensor 416.

The acceleration sensor 411 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 400. For example, the acceleration sensor 411 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 401 may control the touch display screen 405 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 411. The acceleration sensor 411 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 412 may detect a body direction and a rotation angle of the terminal 400, and the gyro sensor 412 may cooperate with the acceleration sensor 411 to acquire a 3D motion of the terminal 400 by the user. From the data collected by the gyro sensor 412, the processor 401 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization while shooting, game control, and inertial navigation.

The pressure sensor 413 may be disposed on a side bezel of the terminal 400 and/or a lower layer of the touch display screen 405. When the pressure sensor 413 is disposed on the side frame of the terminal 400, a user's holding signal to the terminal 400 can be detected, and the processor 401 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 413. When the pressure sensor 413 is disposed at the lower layer of the touch display screen 405, the processor 401 controls the operability control on the UI interface according to the pressure operation of the user on the touch display screen 405. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 414 is used for collecting a fingerprint of the user, and the processor 401 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 414, or the fingerprint sensor 414 identifies the identity of the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 401 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 414 may be disposed on the front, back, or side of the terminal 400. When a physical key or vendor Logo is provided on the terminal 400, the fingerprint sensor 414 may be integrated with the physical key or vendor Logo.

The optical sensor 415 is used to collect the ambient light intensity. In one embodiment, the processor 401 may control the display brightness of the touch display screen 405 based on the ambient light intensity collected by the optical sensor 415. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 405 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 405 is turned down. In another embodiment, the processor 401 may also dynamically adjust the shooting parameters of the camera assembly 406 according to the ambient light intensity collected by the optical sensor 415.

A proximity sensor 416, also known as a distance sensor, is typically disposed on the front panel of the terminal 400. The proximity sensor 416 is used to collect the distance between the user and the front surface of the terminal 400. In one embodiment, when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually decreases, the processor 401 controls the touch display screen 405 to switch from the bright screen state to the dark screen state; when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually becomes larger, the processor 401 controls the touch display screen 405 to switch from the breath screen state to the bright screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 4 is not intended to be limiting of terminal 400 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims

1. A method for determining an evaluation criterion of oil well equipment, the method comprising:

after the target oil well is exploited through the target oil well equipment, determining a reference value of a specified technical index based on the parameters of the target oil well and the parameters of the target oil well equipment, wherein the specified technical index is a technical index needing a predetermined evaluation range in a preset technical index standard table; when the specified technical index comprises a pump detection period, calculating a reference value D of the pump detection period by the following formula:

wherein V is the one-time production input cost of the target oil well, and V_oAs cost price of crude oil, V_{Operation maintenance}For daily maintenance of a single well, V_{Rod and tube replacement}For the cost of replacing the rod-tube in pump-checking operations, V_{Daily electricity consumption fee}Electricity charge, V, for production of oil wells_OthersFor other costs during the production run of the well, T is the daily oil production of the target well equipment, V_{Detection of}D is the average pump detection period of the target oil well equipment, and M is the evaluation period of the target oil well equipment;

determining the evaluation standard range of the specified technical indexes in the preset technical index standard table based on the reference value of the specified technical indexes;

and determining the evaluation standard of the target oil well equipment based on the target technical index and the preset technical index standard table.

2. The method of claim 1, wherein said determining a target technical indicator from said plurality of technical indicators for said target well equipment by analytic hierarchy process comprises:

establishing a judgment matrix according to the technical indexes;

3. The method of claim 2, wherein the establishing a decision matrix based on the plurality of technical indicators comprises:

4. The method of claim 3, wherein determining a weight value for each of the plurality of technical indicators based on the decision matrix comprises:

5. The method of claim 1, wherein said determining an evaluation criterion of said target well equipment based on said target technical indicator and said pre-set technical indicator criteria table comprises:

6. The method of any of claims 1-5, wherein after determining the evaluation criteria for the target well equipment based on the target technical indicator, further comprising:

determining a technical value of the target technical indicator for the target well equipment;

7. An evaluation criterion determining apparatus for oil well equipment, comprising:

the second determination module is used for determining a reference value of a specified technical index based on the parameters of the target oil well and the parameters of the target oil well equipment after the target oil well is mined by the target oil well equipment, wherein the specified technical index is a technical index needing to be determined in advance in a preset technical index standard table; when the specified technical index comprises a pump detection period, calculating a reference value of the pump detection period by the following formula:

wherein V is the one-time production input cost of the target oil well, and V_oAs cost price of crude oil, V_{Operation maintenance}For daily maintenance of a single well, V_{Rod and tube replacement}For the cost of replacing the rod-tube in pump-checking operations, V_{Daily electricity consumption fee}Electricity charge, V, for production of oil wells_OthersFor other costs during the production run of the well, T is the daily oil production of the target well equipment, V_{Detection of}D is the average pump detection period of the target oil well equipment, and M is the evaluation period of the target oil well equipment; determining the evaluation standard range of the specified technical indexes in the preset technical index standard table based on the reference value of the specified technical indexes; and determining the evaluation standard of the target oil well equipment based on the target technical index and the preset technical index standard table.

8. The apparatus of claim 7, wherein the apparatus further comprises:

9. A computer-readable storage medium, having a computer program stored thereon, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.