Construction method and device of water quality assessment index system

Abstract

The invention discloses a construction method and device of a water quality assessment index system, and belongs to the technical field of ground engineering of petroleum and natural gas exploration and development, and the construction method comprises the following steps: step 1, obtaining effluent water quality index numerical data of a produced water treatment station, a water injection station or a water injection wellhead; step 2, calculating the standard reaching rate condition of each single index, and checking the standard reaching rate of the single index of the single station; 3, checking the comprehensive standard reaching rate of a single station; step 4, obtaining single and comprehensive water quality standard-reaching rates of a plurality of stations or wellheads; step 5, obtaining a company-level or plant-level single water quality standard-reaching rate according to the station yard or the wellhead; and step 6, checking the company-level or plant-level comprehensive water quality standard-reaching rate. A water system evaluation index system is scientifically constructed, a complete oil and gas field water quality index assessment system is formed, comparison between oil and gas field companies and comparison between oil and gas field companies and comparison between oil and gas field companies and comparison between oil and gas field companies and comparison between oil and gas field companies and comparison between oil and gas field companies and comparison between oil and gas field companies and comparison between oil and gas field companies and inside oil and gas fields are achieved.

Description

Technical Field

[0001] The present invention belongs to the field of ground engineering technology for oil and gas exploration and development, and relates to a method and device for constructing a water quality assessment index system. Specifically, it relates to a method, device, electronic equipment and storage medium for constructing a water quality assessment index system. Background Art

[0002] More than 70% of China Petroleum's domestic crude oil production comes from water-injected oil fields, which play the role of "ballast stone" of crude oil production. Achieving stable production and increased production of water-injected oil fields is of great significance to ensuring national energy security. The quality of injected water directly affects the effect of water injection development and recovery rate. With the continuous change of oil and gas field development mode, the continuous increase of water content in old oil fields and the deterioration of reserve grade in new blocks, the quality of produced water and incoming water tends to be complicated, emulsified seriously, and the difficulty of treatment increases. The difficulty of ensuring water quality for water injection continues to increase. In order to meet the development needs of oil and gas fields, lean management of water systems is carried out in all oil and gas fields and secondary units, and node control of water quality is implemented. However, for many years, the evaluation indicators of water quality in various oil and gas fields have been inconsistent and inconsistent, with a variety of calculation methods and different definitions, which has made it impossible to carry out assessment and evaluation according to unified standards, find gaps and find deficiencies, and seriously affected the enthusiasm of water system work.

[0003] The standard "Urban Water Supply Water Quality Standard" CJ / T206-2005 gives a method for calculating the urban water supply water quality pass rate. The pass rate is calculated by the ratio of the number of qualified inspections to the number of inspections. It is an absolute compliance rate and is suitable for situations such as urban water supply that have strict requirements on water quality. However, when the water quality does not meet the standard, this method cannot represent the degree of exceeding the standard, and therefore cannot distinguish the actual water quality management level of each unit.

[0004] Chinese patent CN201210336973.3 proposes a method for calculating the water quality compliance rate for produced water treatment stations, and optimizes the absolute value compliance rate method. According to the provisions of SY / T 5329-94, the method calculates the single water quality compliance rate and the comprehensive water quality compliance rate for 7 water quality control indicators and 6 auxiliary indicators respectively, the average corrosion rate and pH are evaluated by the absolute value method, the three types of bacteria indicators are evaluated by the ratio percentage of the measured value logarithm to the standard value logarithm, and the other indicators are evaluated by the ratio percentage of the measured value to the standard value. When the measured value ≥ standard value × 2, the water quality compliance rate of this item is 0%.

[0005] The shortcomings of this calculation method are:

[0006] 1) There are still deficiencies in characterizing the severity of water quality exceeding the standard and distinguishing the level of water quality management. For example, the oil-containing water quality standard is 10 mg / L, and the measured values ​​of stations A and B are 20 mg / L and 100 mg / L respectively. According to this method, the oil-containing water quality compliance rate is 0%, but the degree to which the water quality of station A is close to the standard and the water quality management level are significantly better than those of station B.

[0007] 2) The evaluation and calculation methods used are relatively complicated. Three types of evaluation and calculation methods are used for 13 types of water quality indicators, involving absolute value evaluation, logarithmic ratio percentage evaluation, and ratio percentage evaluation, resulting in a lot of calculation content and a complicated calculation process, which is not convenient for application in production operation management.

[0008] 3) Incomplete coverage. For water injection development of oil fields, water quality requires full process control and management. This method only evaluates the water quality compliance rate of produced water treatment stations, and does not involve the calculation of water quality compliance rate of water injection stations and wellheads, which does not meet the requirements of full process control and management of water quality. Summary of the invention

[0009] The purpose of the present invention is to solve the above-mentioned technical problems, provide a method and device for constructing a water quality assessment index system, scientifically construct a water system evaluation index system, define the calculation method of the water quality compliance rate of the produced water treatment station, the water quality compliance rate of the water injection station and the water quality compliance rate of the water injection wellhead, and can scientifically and effectively calculate the single water quality compliance rate and the comprehensive water quality compliance rate of the joint-stock company, oil and gas field company, each secondary unit and station or wellhead, forming a complete set of oil and gas field water quality index assessment system, comprehensively realizing the comparison between oil and gas field companies and within the oil and gas field, making the work results quantifiable and assessable, and playing a guiding and reference role in helping to refine the management of the water system, improve the water quality compliance rate, and promote high-quality development.

[0010] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0011] On the one hand, the embodiments of the present invention provide a method for constructing a water quality assessment index system.

[0012] Step 1: Input water quality data, and carry out data statistics and collation according to relevant treatment indicators of water inlet and outlet of the station or wellhead, including standard values ​​and measured values ​​of various indicators.

[0013] Step 2: Assess the compliance rate of single-item water quality at single stations. The compliance rate of single-item water quality at single stations can be calculated based on the ratio of single-item water quality standard value to single-item water quality test value, where single-item water quality standard value is the standard requirement of the corresponding indicator, and water quality test value is the data actually tested on site.

[0014] Step 3: Assess the comprehensive compliance rate of each station. The comprehensive water quality compliance rate of each station is calculated based on the sum of the single-item water quality compliance rates of each station calculated in step 2 and the ratio of the number of water quality index tests at each station.

[0015] Step 4: According to Step 2 and Step 3, calculate the single and comprehensive water quality compliance rates of multiple stations or wellheads belonging to the oil (gas) field company / oil (gas) production plant.

[0016] Step 5: Assess the individual water quality compliance rates of oil (gas) field companies and oil (gas) production plants. The individual water quality compliance rates of oil and gas field companies / secondary units are obtained based on the sum of the product of the individual water quality compliance rates of multiple stations or wellheads and the produced water treatment volume or wellhead injection volume, and the sum ratio of the actual water volume, that is, the weighted average of the individual water quality compliance rates of multiple stations or wellheads.

[0017] Step 6: Assess the comprehensive water quality compliance rate of oil (gas) field companies and oil (gas) production plants. The comprehensive water quality compliance rate of oil and gas field companies / secondary units is obtained based on the ratio of the sum of the products of the comprehensive water quality compliance rates of multiple stations or wellheads and the produced water treatment volume or wellhead injection volume to the sum of the water volumes, that is, the weighted average of the comprehensive water quality compliance rates of multiple stations or wellheads.

[0018] Further, step 1 is specifically as follows: input water quality data is divided into treatment indicators of influent water quality and effluent water quality, including oil content, suspended solids content, median suspended solids particle size, sulfate-reducing bacteria, iron bacteria, saprophytes and other common indicators in oil and gas field water treatment, as well as COD, BOD, ammonia nitrogen, dissolved oxygen, total hardness and other common water quality indicators.

[0019] Furthermore, the various water quality indicators are divided into standard values ​​and measured values. The standard values ​​are the target values ​​of water discharge at each station or wellhead, and the measured values ​​are obtained by sampling and testing at the station or wellhead. The data should be cleaned to remove invalid and abnormal data.

[0020] Furthermore, the water quality index data that need to be input should be determined according to the requirements of different uses of the station's effluent, such as for water injection, reuse or discharge, etc., which have differences in the water quality indicators of concern.

[0021] Furthermore, in step 2, the single-item water quality compliance rate of a single station is the ratio of the single water quality standard value to the single water quality detection value, which reflects the degree to which the single water quality index measurement value of a single station or wellhead reaches the standard value. The result is expressed as a percentage. When the measurement value is less than the standard value, it can be taken as 100%. The degree of water quality index treatment can also be compared as needed. The higher the ratio of the calculated result, the better the degree of treatment.

[0022] Furthermore, in step 3, the comprehensive compliance rate of a single station is the ratio of the sum of the compliance rates of various water quality indicators at the single station to the number of water quality index detection items at the single station, where the maximum value of the compliance rate of each water quality indicator is 100%, reflecting the comprehensive water quality treatment degree of the produced water at the single station.

[0023] Furthermore, the method also includes step 4: In order to further assess the overall water quality of the oil (gas) field company / oil (gas) production plant, the individual water quality compliance rates and comprehensive water quality compliance rates of all produced water treatment stations under it should be calculated.

[0024] Furthermore, the method also includes step 5: the single water quality compliance rate of the oil (gas) field company and oil (gas) production plant is the weighted average of the single water quality compliance rates of multiple stations or wellheads, and the weight is the actual water treatment volume of each station or wellhead injection volume.

[0025] Furthermore, the method also includes step 6: the comprehensive water quality compliance rate of the oil (gas) field company and oil (gas) production plant is the weighted average of the comprehensive water quality compliance rates of multiple stations or wellheads, and the weight is the actual water treatment volume of each station or wellhead injection volume.

[0026] In a second aspect, the present invention provides a device for constructing a water quality assessment index system, comprising:

[0027] The acquisition module is used to obtain the input water quality index data and station or wellhead information (number of stations or wellheads, actual water treatment volume or water injection volume, etc.);

[0028] Management module, used for input data management, statistics of standard values ​​and measured values ​​of various indicators, number of stations or wellheads, actual water treatment volume or water injection volume, etc.;

[0029] The water quality compliance rate calculation module is used to calculate the single water quality compliance rate of a station or wellhead, the comprehensive water quality compliance rate, the single water quality compliance rate of an oil (gas) field company and an oil (gas) production plant, and the comprehensive water quality compliance rate of an oil (gas) field company and an oil (gas) production plant.

[0030] In a third aspect, the present invention provides an electronic device, a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0031] Memory, used to store computer programs;

[0032] The processor is used to implement the method for constructing the water quality assessment index system described in the present invention when executing the program stored in the memory.

[0033] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by one or more processors, implements the method for constructing a water quality assessment index system described in the present invention.

[0034] The method and device for constructing a water quality assessment index system proposed in the embodiment of the present invention achieve full coverage of water quality indicators and establish a complete water quality assessment index system. The proposed water quality compliance rate can reflect the degree to which the measured value of a single water quality index reaches the standard value. The closer the actual measured value is to the standard value, the higher the compliance rate is. It can scientifically reflect and distinguish the effectiveness of water quality management work, and at the same time achieve full coverage of process flow and management level, which facilitates horizontal comparison between units, and can characterize the overall situation of water quality compliance rate. It plays a guiding and reference role in helping the refined management of water systems, improving water quality compliance rate, and promoting high-quality development. It has a profound theoretical basis and method, and is advanced, scientific, systematic, and comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of a process for constructing a water quality assessment index system provided by an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the entire process of calculating the water quality compliance rate of the station;

[0038] Figure 3 This is a schematic diagram of the entire process of calculating the wellhead water quality compliance rate;

[0039] Figure 4 The figure is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0041] like Figure 1As shown, the present invention provides a method for constructing a water quality assessment index system, which is divided into a data input stage 101, an information sorting stage 102, and a calculation stage 103.

[0042] The data input stage 101 is to obtain water quality indicators through sampling and testing at the produced water treatment station or water injection station or water injection wellhead, and input them. In the compliance assessment stage, the main assessment target is the station water quality or wellhead injection water quality. The assessment indicators include oil content, suspended solid content, suspended solid particle size median, sulfate-reducing bacteria, iron bacteria, saprophytes and other common indicators in oil and gas field water treatment.

[0043] The information sorting stage 102 sorts out the input water quality data and matches it with the station or wellhead information, water quality standards, actual treatment volume or injection volume, the unit or company to which the station or wellhead belongs, and other information.

[0044] The operation stage 103 is divided into single station (well) single water quality compliance rate calculation 1031, single station (well) comprehensive water quality compliance rate calculation 1032, affiliated station or wellhead water quality compliance rate calculation 1033, oil and gas field company / secondary unit single water quality compliance rate calculation 1034, oil and gas field company / secondary unit comprehensive water quality compliance rate calculation 1035 according to the calculation steps.

[0045] like Figure 2The figure shows the flow chart of calculating the water quality compliance rate of the station. The input water quality data are divided into treatment indicators of inlet water quality A and outlet water quality B, including but not limited to oil content, suspended solid content, median suspended solid particle size, sulfate-reducing bacteria, iron bacteria, saprophytes and other common indicators in oil and gas field water treatment. According to the needs of the station, each water quality indicator is divided into annual measurement value C and standard value D. The standard value is the outlet water target value of each station, and the measurement value is obtained by sampling and testing at the station site. The data should be cleaned and invalid and abnormal data should be eliminated. The single-item water quality compliance rate of a single station is the ratio of the single water quality standard value to the single water quality test value, reflecting the degree to which the single water quality indicator measurement value of a single station reaches the standard value. The result is expressed as a percentage. When the measurement value is less than the standard value, it can be taken as 100%. The degree of water quality indicator treatment can also be compared according to needs. The higher the ratio of the calculated result, the better the degree of treatment. The comprehensive compliance rate of a single station is the sum of the compliance rates of each water quality item at a single station and the ratio of the number of water quality index detection items at a single station, where the maximum compliance rate of each water quality item is 100%, reflecting the comprehensive water quality treatment degree of produced water at a single station. In order to further assess the overall water quality of the oil (gas) field company / oil (gas) production plant, the single water quality compliance rate and comprehensive water quality compliance rate of all produced water treatment stations under its jurisdiction should be calculated. The single water quality compliance rate of an oil (gas) field company and oil (gas) production plant is the weighted average of the single water quality compliance rates of multiple stations under its jurisdiction, with the weight being the actual amount of water treated by each station. The comprehensive water quality compliance rate of an oil (gas) field company and oil (gas) production plant is the weighted average of the comprehensive water quality compliance rates of multiple stations under its jurisdiction, with the weight being the actual amount of water treated by each station.

[0046] like Figure 3As shown in the figure, it is a flow chart for calculating the water quality compliance rate at the wellhead. It is a flow chart for calculating the water quality compliance rate at the wellhead. The input water quality data is the treatment index of the wellhead water quality A, including but not limited to oil content, suspended solid content, median suspended solid particle size, sulfate-reducing bacteria, iron bacteria, saprophytes and other common indicators in oil and gas field water injection. According to the needs of the formation, each water quality index is divided into annual measurement value B and standard value C. The standard value is the wellhead water injection target value, and the measurement value is obtained by on-site sampling test at the wellhead. The data should be cleaned and invalid and abnormal data should be eliminated. The single-item water quality compliance rate of a single well is the ratio of the single water quality standard value to the single water quality detection value, which reflects the degree to which the measurement value of a single water quality index at a single wellhead reaches the standard value. The result is expressed as a percentage. When the measurement value is less than the standard value, it can be taken as 100%. The degree of water quality index treatment can also be compared according to needs. The higher the ratio of the calculated result, the better the degree of treatment. The comprehensive compliance rate of a single well is the sum of the compliance rates of each water quality indicator of a single well and the ratio of the number of water quality indicator detection items of a single well, where the maximum compliance rate of each water quality indicator is 100%, reflecting the comprehensive water quality of the single well water injection. In order to further assess the overall wellhead water quality of the oil (gas) field company / oil (gas) production plant, the single water quality compliance rate and comprehensive water quality compliance rate of all wellheads should be calculated. The single water quality compliance rate of the oil (gas) field company and oil (gas) production plant is the weighted average of the single water quality compliance rates of multiple injection wells, and the weight is the actual water injection volume of each wellhead. The comprehensive water quality compliance rate of the wellhead of the oil (gas) field company and oil (gas) production plant is the weighted average of the comprehensive water quality compliance rates of multiple injection wells, and the weight is the actual water injection volume of each wellhead.

[0047] The implementation method and implementation principle of the batch model processing device provided in the embodiment of the present invention are similar to those of the above-mentioned embodiment and will not be repeated here.

[0048] like Figure 4 As shown, an embodiment of the present invention provides an electronic device, including a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0049] A memory 113, for storing computer programs;

[0050] In one embodiment of the present invention, the processor 111 is used to implement the steps of the batch model processing method provided by any one of the aforementioned method embodiments when executing the program stored in the memory 113.

[0051] The implementation principle and technical effect of the electronic device provided by the embodiment of the present invention are similar to those of the above embodiment and will not be described in detail here.

[0052] The above-mentioned memory 113 can be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk or a ROM. The memory 113 has a storage space for program codes for executing any method steps in the above-mentioned method. For example, the storage space for program codes may include various program codes for implementing the various steps in the above method respectively. These program codes can be read from or written into one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such computer program products are usually portable or fixed storage units. The storage unit may have a storage segment or storage space arranged similarly to the memory 113 in the above-mentioned electronic device. The program code can be compressed, for example, in an appropriate form. Generally, the storage unit includes a program for executing the method steps according to an embodiment of the present invention, that is, a code that can be read by a processor such as 111, which, when run by an electronic device, causes the electronic device to execute the various steps in the method described above.

[0053] The embodiment of the present invention further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the batch model processing method described above are implemented.

[0054] The computer-readable storage medium may be included in the device / apparatus described in the above embodiment; or it may exist independently without being assembled into the device / apparatus. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present invention is implemented.

[0055] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, apparatus, or device.

[0056] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing such systems. In addition, the present invention is not directed to any specific programming language either. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the description of the above specific languages ​​is for disclosing the best mode of the present invention.

[0057] In addition, the memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0058] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0059] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or boxes.

[0060] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0061] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0062] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0063] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0064] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0065] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0066] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0067] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the present invention.

Claims

1. A method for constructing a water quality assessment index system, characterized in that: The method comprises the following steps: Step 1: Input water quality data, and carry out data statistics and collation according to the relevant treatment indicators of the inlet and outlet water of the station or wellhead, including the standard value and measured value of each indicator; Step 2: Assess the compliance rate of single-item water quality at a single station. The compliance rate of single-item water quality at a single station is calculated based on the ratio of the single-item water quality standard value to the single-item water quality test value, where the single-item water quality standard value is the standard requirement of the corresponding indicator, and the water quality test value is the data actually tested on site; Step 3: Assess the comprehensive compliance rate of a single station. The comprehensive compliance rate of a single station is calculated by summing up the compliance rates of individual items of water quality at the single station calculated in step 2 and comparing it with the number of items of water quality indicators tested at the single station. Step 4: According to Step 2 and Step 3, calculate the single and comprehensive water quality compliance rates of multiple stations or wellheads belonging to the oil and gas field company / oil and gas production plant; Step 5: Assess the single water quality compliance rate of oil and gas field companies and oil and gas production plants. The single water quality compliance rate of oil and gas field companies / secondary units is obtained based on the sum of the product of the single water quality compliance rates of multiple stations or wellheads and the produced water treatment volume or wellhead water injection volume, and the sum of the ratio of the actual water volume, that is, the weighted average of the single water quality compliance rates of multiple stations or wellheads; Step 6: Assess the comprehensive water quality compliance rate of oil and gas field companies and oil and gas production plants. The comprehensive water quality compliance rate of oil and gas field companies / secondary units is obtained based on the ratio of the sum of the products of the comprehensive water quality compliance rates of multiple stations or wellheads and the produced water treatment volume or wellhead injection volume to the sum of the water volumes, that is, the weighted average of the comprehensive water quality compliance rates of multiple stations or wellheads.

2. The method according to claim 1, characterized in that Step 1 is as follows: Input water quality data is divided into treatment indicators of influent water quality and effluent water quality, including oil content, suspended solids content, median suspended solids particle size, sulfate-reducing bacteria, iron bacteria, saprophytes, which are common indicators in oil and gas field water treatment, as well as COD, BOD, ammonia nitrogen, dissolved oxygen, and total hardness.

3. The method according to claim 2, characterized in that The water quality indicators are divided into standard values ​​and measured values. The standard values ​​are the target water output values ​​of each station or wellhead, and the measured values ​​are obtained by on-site sampling tests at the station or wellhead. The data should be cleaned to remove invalid and abnormal data.

4. The method according to claim 2, characterized in that: The water quality index data that need to be input should be determined according to the requirements of different uses of the station's effluent, and there will be differences in the water quality indicators of concern.

5. The method according to claim 1, characterized in that In step 2, the single-item water quality compliance rate of a single station is the ratio of the single water quality standard value to the single water quality detection value, which reflects the degree to which the single water quality index measurement value of a single station or wellhead reaches the standard value. The result is expressed as a percentage. When the measurement value is less than the standard value, it is taken as 100% or the degree of water quality index treatment is compared as needed. The higher the ratio of the calculated result, the better the degree of treatment.

6. The method according to claim 1, characterized in that In step 3, the comprehensive compliance rate of a single station is the ratio of the sum of the compliance rates of various water quality indicators at the single station to the number of water quality index detection items at the single station, where the maximum value of the compliance rate of each water quality indicator is 100%, reflecting the comprehensive water quality treatment degree of the produced water at the single station.

7. The method according to claim 1, characterized in that In step 4, in order to further assess the overall water quality of the oil and gas field company / oil and gas production plant, the individual water quality compliance rates and comprehensive water quality compliance rates of all produced water treatment stations under it should be calculated.

8. The method according to claim 1, characterized in that: In step 5, the single water quality compliance rate of the oil and gas field company and the oil and gas production plant is the weighted average of the single water quality compliance rates of multiple stations or wellheads, and the weight is the actual water treatment volume of each station or wellhead injection volume.

9. The method according to claim 1, characterized in that: In step 6, the comprehensive water quality compliance rate of the oil and gas field company and the oil and gas production plant is the weighted average of the comprehensive water quality compliance rates of multiple stations or wellheads, and the weight is the actual water treatment volume of each station or wellhead injection volume.

10. A device for constructing a water quality assessment index system, characterized in that: include: The acquisition module is used to obtain the input water quality index data and station or wellhead information; Management module, used for input data management, standard values ​​and measured values ​​of various indicators, number of stations or wellheads, actual water treatment volume or water injection volume; The water quality compliance rate calculation module is used to calculate the single water quality compliance rate of the station or wellhead, the comprehensive water quality compliance rate, the single water quality compliance rate of the oil and gas field company and the oil and gas production plant, and the comprehensive water quality compliance rate of the oil and gas field company and the oil and gas production plant.

11. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, used to store computer programs; The processor is used to implement the method for constructing the water quality assessment index system as described in any one of claims 1 to 9 when executing the program stored in the memory.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program, when executed by one or more processors, implements the method for constructing a water quality assessment index system according to any one of claims 1 to 9.

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