A performance evaluation test system and method for compact separation equipment of offshore oilfield produced water

Abstract

The present invention relates to a performance evaluation test system and method for offshore oilfield production water compact separation equipment, comprising: a separation performance test module, which is used for performing separation performance tests on oilfield production water through oilfield original production water treatment equipment and oilfield production water compact separation equipment based on oilfield water treatment requirements, and obtaining separation performance test results of equipment at each level in the oilfield original production water treatment equipment and the oilfield production water compact separation equipment; a database module, which is used for storing oilfield information and separation performance test results of oilfield original production water treatment equipment and oilfield production water compact separation equipment; and a test result analysis module, which is used for analyzing the oilfield original production water treatment equipment and the oilfield production water compact separation equipment according to the data stored in the database module. The present invention can be widely used in the field of offshore oilfield production water.

Description

Technical Field

[0001] The invention relates to the field of offshore oilfield produced water, and in particular to a performance evaluation test system and method for a compact separation device for offshore oilfield produced water. Background Art

[0002] The volume of produced water from offshore oil fields is large and the composition is complex. It contains a large amount of petroleum hydrocarbons, solid particles and other substances, which poses major challenges to its direct discharge or reuse. The water quality characteristics in different regions vary significantly, and the marine environment is highly sensitive to pollution. Therefore, the production water treatment method of offshore oil fields must be able to purify the water efficiently, and the discharged water must comply with strict environmental regulations and standards to ensure minimal impact on the marine ecosystem.

[0003] At present, the production water treatment system of offshore oil fields mainly adopts inclined plate oil removers / oil separators, hydrocyclones, air flotation separators, walnut shell filters, water purification buffer tanks, etc., and is equipped with corresponding chemical agents to achieve the discharge water quality indicators. However, the current offshore oil field production water treatment system occupies a large amount of space on the offshore platform, the equipment occupies a large area, is heavy, and has the disadvantages of high investment cost and operating energy consumption. At present, efficient production water compact separation equipment is being applied and promoted on offshore platforms. Therefore, corresponding performance evaluation test methods and systems are urgently needed to accurately evaluate the performance of production water compact separation equipment. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a performance evaluation test system and method for compact production water separation equipment of offshore oil fields, which can accurately evaluate the compact production water separation equipment and reduce investment costs and operating energy consumption.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: In a first aspect, a performance evaluation and testing system for a compact separation device for produced water in an offshore oil field is provided, comprising: The separation performance test module is used to test the separation performance of the produced water of the oil field through the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field based on the oil field water treatment requirements, test the operation of the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field under different working conditions, and obtain the separation performance test results of each level of equipment in the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field; A database module for storing oil field information and separation performance test results of oil field original production water treatment equipment and oil field production water compact separation equipment; The test result analysis module is used to analyze the oilfield original production water treatment equipment and the oilfield production water compact separation equipment according to the data stored in the database module, calculate the equipment treatment effect, land occupation and treatment volume comprehensive indicators, comprehensive energy consumption and ton water treatment cost of each level of equipment in the oilfield original production water treatment equipment and the oilfield production water compact separation equipment, and evaluate the difficulty of oilfield production water treatment, and determine the comprehensive treatment capacity and advantages and disadvantages of each level of equipment in the oilfield production water compact separation equipment.

[0006] Furthermore, the oilfield produced water compact separation equipment comprises a water inlet pipe, a primary separator, a secondary oil remover, a tertiary depth separator, a water outlet pipe and an oil outlet pipe, wherein the primary separator, the secondary oil remover and the tertiary depth separator are fixedly arranged on the same skid, and the reagent is selectively added at different positions of the oilfield produced water compact separation equipment according to the oilfield water quality characteristics; One end of the water inlet pipe is connected to the production water inlet, and the other end of the water inlet pipe is connected to the tertiary depth separator through the primary separator and the secondary oil remover in sequence. The primary separator is used to remove part of the gas, suspended oil and dispersed oil in the production water; the secondary oil remover is used to remove part of the emulsified oil droplets and suspended particles in the production water; the tertiary depth separator is used to remove the oil droplets and suspended particles in the production water to obtain purified water; the water phase outlet of the tertiary depth separator is connected to the water outlet pipe, and the oil phase outlet of the tertiary depth separator is connected to the platform closed drain tank or the dirty oil tank through the oil outlet pipe.

[0007] Furthermore, the first-stage separator adopts a multi-stage cyclone separator, the second-stage oil remover adopts a coalescence demulsification oil remover, and the third-stage depth separator adopts a heterogeneous particle depth separator.

[0008] Furthermore, the added agents include reverse demulsifiers, demulsifiers, flocculants, water purifiers, antiscalants or bactericides, and are added at corresponding positions of the oilfield production water compact separation device 4 according to the different effects of the agents.

[0009] Furthermore, the information of the oil field includes the oil products and water quality of the oil field, and the separation performance test results of the original production water treatment equipment of the oil field and the compact production water separation equipment of the oil field include the size, weight, production water residence time, type and volume of consumed chemicals, processing capacity, power consumption, changes in oil content and suspended solids content at the outlet of each level of equipment, whether chemicals are added and the consumption of chemicals, as well as equipment design indicators, engineering consumption, economic investment, type and volume of chemicals consumed, and price of chemicals.

[0010] On the other hand, a method for evaluating the performance of a compact separation device for producing water in an offshore oil field is provided, comprising: According to the requirements of the oil field, the oil field production water compact separation equipment is transported to the designated location and installed; The database module obtains the information of the oil field and the data of the original production water treatment equipment of the oil field; The separation performance test module conducts separation performance test on the produced water of the oil field through the oil field produced water compact separation equipment, and tests the operation of the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field under different working conditions. When the test time reaches a certain number of days, the separation performance test results of the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field in this separation performance test are obtained; The database module records the separation performance test results of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment; The test result analysis module analyzes the original oilfield production water treatment equipment and the oilfield production water compact separation equipment based on the data recorded by the database module, calculates the equipment treatment effect, comprehensive indicators of land occupation and treatment volume, comprehensive energy consumption and ton of water treatment cost of each level of equipment in the oilfield production water compact separation equipment, and classifies them according to the oil products and water quality of each oilfield, evaluates the difficulty of oilfield production water treatment, and determines the comprehensive treatment capacity and advantages and disadvantages of each level of equipment in the oilfield production water compact separation equipment.

[0011] Furthermore, the comprehensive indicators of the area occupied and the processing capacity of each level of equipment in the oilfield production water compact separation equipment include area evaluation parameters and volume evaluation parameters :

[0012]

[0013] in, is the average flow rate; is the equipment skid area; It is the volume of the equipment skid.

[0014] Furthermore, the comprehensive energy consumption of each level of equipment in the oilfield produced water compact separation equipment is:

[0015] In the formula, is the comprehensive energy consumption; is the number of energy types consumed; The actual consumption during production and / or cleaning Amount of energy; For the The standard cost of the energy source.

[0016] Furthermore, the ton water treatment cost of each level of equipment in the oilfield production water compact separation equipment is:

[0017] In the formula, is the cost of treating a ton of water; For comprehensive processing costs; To treat sewage volume.

[0018] Furthermore, the information of the oil field includes the oil products and water quality of the oil field, and the separation performance test results of the original production water treatment equipment of the oil field and the compact production water separation equipment of the oil field include the size, weight, production water residence time, type and volume of consumed chemicals, processing capacity, power consumption, changes in oil content and suspended solids content at the outlet of each level of equipment, whether chemicals are added and the consumption of chemicals, as well as equipment design indicators, engineering consumption, economic investment, type and volume of chemicals consumed, and price of chemicals.

[0019] The present invention adopts the above technical solution, which has the following advantages: 1. The compact oilfield produced water separation equipment used in the system provided by the present invention can efficiently separate oilfield produced water by physical methods, providing important reference value for the oilfield water treatment system.

[0020] 2. The compact oilfield produced water separation device in the separation performance test module of the present invention adopts a novel physical separation method to grade the produced water, thereby achieving an accurate comparison of the produced water treatment device with the compact separation device.

[0021] 3. The test result analysis module of the present invention can determine the comprehensive processing capacity and the advantages and disadvantages of each level of equipment in the oilfield production water compact separation equipment, and then can give appropriate suggestions based on the advantages and disadvantages.

[0022] 4. The present invention facilitates the formulation of targeted repair plans by recording and preserving the test results of oil field produced water, and also facilitates personnel to understand the treatment status of produced water.

[0023] In summary, the present invention can be widely used in the field of offshore oilfield production water. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings: Figure 1 is a schematic diagram of a system structure provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the system operation flow provided by an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a compact separation device for oilfield produced water provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0025] 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 described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0026] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments, and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0027] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0028] At present, efficient compact separation equipment for produced water is being researched and promoted on offshore platforms. Corresponding performance evaluation test methods and systems are urgently needed to accurately evaluate the performance of compact separation equipment for produced water in oil fields. The invention provides a performance evaluation and testing system for offshore oilfield production water compact separation equipment, comprising: a separation performance testing module, which is used for performing separation performance tests on oilfield production water through oilfield original production water treatment equipment and oilfield production water compact separation equipment respectively based on oilfield water treatment requirements, testing the operation conditions of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment under different working conditions, and obtaining separation performance test results of equipment at various levels in the oilfield original production water treatment equipment and the oilfield production water compact separation equipment; a database module, which is used for storing oilfield information and separation performance test results of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment; a test result analysis module, which is used for analyzing the oilfield original production water treatment equipment and the oilfield production water compact separation equipment according to the data stored in the database module, calculating the equipment treatment effects, land occupation and treatment volume comprehensive indicators, comprehensive energy consumption and ton water treatment cost of equipment at various levels in the oilfield original production water treatment equipment and the oilfield production water compact separation equipment, and evaluating the difficulty of oilfield production water treatment, and determining the comprehensive treatment capacity and advantages and disadvantages of equipment at various levels in the oilfield production water compact separation equipment. The present invention can evaluate and analyze the outlet water quality and economic efficiency of each level of equipment in the oilfield production water compact separation equipment, improve the oilfield production water treatment capacity, and reduce the loss of oilfield water treatment equipment and chemicals.

[0029] Example 1 like Figure 1 to Figure 2 As shown, this embodiment provides a performance evaluation and testing system for compact separation equipment for producing water in offshore oil fields, including a separation performance testing module 1 , a database module 2 and a test result analysis module 3 .

[0030] The separation performance test module 1 is used to perform separation performance tests on the separation performance test results of the oilfield production water through the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4, respectively, to test the operation conditions of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4 under different working conditions, and to obtain the separation performance test results of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4.

[0031] The database module 2 is used to store the information of the oil field and the separation performance test results of the original production water treatment equipment of the oil field and the compact production water separation equipment 4 of the oil field, wherein the information of the oil field includes information such as the oil product and water quality of the oil field, and the separation performance test results of the original production water treatment equipment of the oil field and the compact production water separation equipment 4 of the oil field include the size, weight, production water residence time (the time required for production water to be transported from the equipment inlet to the equipment outlet), the type and volume of consumed reagents, the processing capacity (equipment design indicators, which can be directly obtained), power consumption, the changes in the oil content and suspended solids content at the outlet of each level of equipment, whether to add reagents and the consumption of reagents, as well as equipment design indicators (equipment size, processing capacity, import and export oil content indicators, space occupied, equipment deadweight and operating weight, production water residence time), engineering consumption (equipment power consumption, water consumption, gas consumption), economic investment (investment cost, inspection and maintenance cost, operating cost), reagent type and consumption volume, and reagent price and other parameters.

[0032] The test result analysis module 3 is used to analyze the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4 according to the data stored in the database module 2, calculate the equipment treatment effect of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4 at each level of equipment (change in oil content at the inlet and outlet of the equipment), comprehensive indicators of land occupation and processing volume (area evaluation parameters and volume evaluation parameters), comprehensive energy consumption and ton of water treatment cost, and evaluate the difficulty of oilfield production water treatment to determine the comprehensive processing capacity and advantages and disadvantages of each level of equipment in the oilfield production water compact separation equipment 4.

[0033] In a preferred embodiment, Figure 3 As shown, the compact separation equipment 4 for oilfield produced water includes a water inlet pipe 41, a primary separator 42, a secondary oil remover 43, a tertiary depth separator 44, a water outlet pipe 45 and an oil outlet pipe 46. One end of the water inlet pipe 41 is connected to the produced water inlet, and the other end of the water inlet pipe 41 is connected to the tertiary depth separator 44 through the primary separator 42 and the secondary oil remover 43 in sequence. The primary separator 42 is used to remove most of the gas, suspended oil and dispersed oil in the produced water, the secondary oil remover 43 is used to remove most of the emulsified oil droplets and suspended particles in the produced water, and the tertiary depth separator 44 is used to remove the oil droplets and suspended particles in the produced water to obtain purified water. The water phase outlet of the tertiary depth separator 44 is connected to the water outlet pipe 45, and the oil phase outlet of the tertiary depth separator 44 is connected to the platform closed drain tank or the dirty oil tank through the oil outlet pipe 46 for discharge or reuse as required. The primary separator 42, the secondary oil remover 43 and the tertiary depth separator 44 are fixedly arranged on the same skid, and the reagents can be selectively added at different positions of the oilfield production water compact separation device 4 according to the oilfield water quality characteristics. The oil phase and the water phase separated in the oilfield production water compact separation device 4 can be recycled, and the overall resource recycling rate of the system is high.

[0034] In a preferred embodiment, the first-stage separator 42 may be a multi-stage cyclone separator, the second-stage oil remover 43 may be a coalescing demulsifier oil remover, and the third-stage depth separator 44 may be a heterogeneous particle depth separator.

[0035] In a preferred embodiment, when oilfield production water is separated, chemicals are added at different positions of the compact oilfield production water separation equipment 4. The added chemicals include reverse demulsifiers, demulsifiers, flocculants, water purifiers, scale inhibitors, bactericides, etc., which are added at corresponding positions of the compact oilfield production water separation equipment 4 according to their different effects.

[0036] Specifically, for example, the existing production water treatment capacity of a platform in Bohai Sea, China is 3300 m3 / d, with a comprehensive water content of about 80%. The well fluid is treated by the primary production separator, the secondary production separator, the hydrocyclone separator and the walnut shell filter before reinjection. The platform uses four-stage equipment in series for produced fluid reinjection treatment. The total production water residence time of the process is about 131min. 90ppm of demulsifier, 90ppm of reverse demulsifier and 100ppm of water clarifier are added to the inlet of the primary separator 42. During the test phase, under this condition, the average water phase outlet oil content of the primary production separator of the original process of the platform was 555 ppm, the average water phase outlet oil content of the secondary production separator was 45 ppm, the average water phase outlet oil content of the hydrocyclone separator was 32 ppm, the average water phase outlet oil content of the walnut shell filter was 21 ppm, the average particle size median was 3um, and the average suspended matter content was 5.50μm.

[0037] The compact separation equipment 4 for oilfield produced water in the separation performance test module 1 uses a full-process water treatment equipment of a multi-stage cyclone separator (primary separator 42), a coalescing demulsifier (secondary demulsifier 43) and a heterogeneous particle depth separator (third-stage depth separator 44) for pilot testing, and the water output index of the platform process is compared simultaneously to verify the treatment effect of the equipment. During the test phase, the process treatment liquid volume is 5-5.5 m³ / h, and 70ppm of reverse demulsifier is added at the inlet of the multi-stage cyclone separator. The water content of the well fluid is 78.33% (oil content is 21.67%), the total production water residence time is 17min, the average water phase outlet oil content of the multi-stage cyclone separator is 1648.6 ppm, the average water phase outlet oil content of the coalescing demulsifier is 31.14 ppm, the average water phase outlet oil content of the heterogeneous particle depth separator is 5.43 ppm, the average particle size median is 2.15um, and the average suspended matter content is 3.50μm.

[0038] Compared with the platform treatment process, the total production water retention time is reduced by 87%, demulsifiers and water clarifiers are eliminated, and the use of reverse demulsifiers is reduced by 22%; the process runs stably, the equipment treatment effect is better than the original process treatment effect of the platform, and the total water output indicators meet the platform reinjection water standards, as shown in Table 1 below: Table 1: Main parameters of water treatment equipment

[0039] Example 2 This embodiment provides a performance evaluation and testing method for a compact separation device for producing water in an offshore oil field, comprising the following steps: 1) According to the requirements of the oil field, the oil field produced water compact separation equipment 4 is transported to the designated location and installed.

[0040] 2) Database module 2 obtains information about the oil field, wherein the information about the oil field includes information about the oil products and water quality of the oil field.

[0041] 3) The separation performance test module 1 performs separation performance tests on the oilfield production water through the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4 respectively, and tests the operation of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4 under different working conditions. Each working condition is operated for at least 3 days. When the test time reaches a certain number of days, the separation performance test results of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment 4 in this separation performance test are obtained.

[0042] 4) Database module 2 records the separation performance test results of the original oilfield production water treatment equipment and the oilfield production water compact separation equipment 4, including the size, weight, production water residence time (the time required for production water from the equipment inlet to the equipment outlet), the type and volume of consumed reagents, processing capacity (equipment design indicators, which can be directly obtained), power consumption, changes in oil content and suspended solids content at the outlet of each level of equipment, whether to add reagents and reagent consumption data, as well as equipment design indicators (equipment size, processing capacity, import and export oil content indicators, space occupation, equipment weight and operating weight, production water residence time), engineering consumption (equipment power consumption, water consumption, gas consumption), economic investment (input cost, inspection and maintenance cost, operating cost), reagent type and consumption volume, and reagent price and other parameters, and adjusts the operating flow, chemical dosage and other conditions of the oilfield production water compact separation equipment 4 through the separation performance test module 1.

[0043] 5) The test result analysis module 3 analyzes the original oilfield production water treatment equipment and the oilfield production water compact separation equipment 4 according to the data recorded by the database module 2, calculates the equipment treatment effect of each level of equipment in the oilfield production water compact separation equipment 4 (the change of oil content at the inlet and outlet of the equipment), the comprehensive indicators of land occupation and treatment volume (area evaluation parameters and volume evaluation parameters), the comprehensive energy consumption and the cost of treating a ton of water, and classifies the equipment according to the oil products and water quality of each oilfield, evaluates the difficulty of oilfield production water treatment, and determines the comprehensive treatment capacity and advantages and disadvantages of each level of equipment in the oilfield production water compact separation equipment 4.

[0044] Specifically, the area occupied and the comprehensive index of the processing volume of each level of equipment in the oilfield production water compact separation equipment 4 are used to reflect the compactness and efficiency of the oilfield production water compact separation equipment 4. The area occupied and the comprehensive index of the processing volume include the area evaluation parameters and volume evaluation parameters : (1) (2) in, is the average flow rate; is the equipment skid area; The volume of the equipment skid. The larger the value, the smaller the equipment occupies at the same processing scale.

[0045] Specifically, the calculation scope of the comprehensive energy consumption of each level of equipment in the oilfield production water compact separation equipment 4 includes various energy sources actually consumed, including water, air, nitrogen, electricity, etc. The calculation formula of the comprehensive energy consumption is: (3) In the formula, is the comprehensive energy consumption; is the number of energy types consumed; The actual consumption during production and / or cleaning Amount of energy (including energy consumed by energy-consuming working fluids); For the The standard cost of the energy source.

[0046] Specifically, the ton water treatment cost of each level of equipment in the oilfield production water compact separation equipment 4 refers to the total cost required to treat one ton of sewage during the sewage treatment process, including energy consumption costs, chemical costs, facility equipment overhaul costs, facility equipment maintenance costs, etc. The calculation formula for the ton water treatment cost is: (4) In the formula, is the cost of treating a ton of water; For comprehensive processing costs; To treat sewage volume.

[0047] Specifically, the difficulty assessment of produced water treatment refers to the comparison of parameters such as the area / volume occupied (area evaluation parameter / volume evaluation parameter) and the amount of chemical agents used to achieve the same treatment effect when the same type of equipment is used to treat the same amount of produced water. It is classified according to their numerical values ​​(equipment volume first, then chemical agents) and can be roughly divided into three categories: small volume, large volume, and large volume requiring the addition of agents.

[0048] Specifically, the comprehensive processing capacity of each level of equipment in the compact separation equipment for oilfield production water 4 includes the processing effect of each level of equipment during operation, area evaluation parameters, volume evaluation parameters (platform construction cost), comprehensive energy consumption, ton of water treatment cost, funds required for equipment construction and other parameters, which are combined in different proportions to calculate the comprehensive evaluation index (or can be converted into capital investment under fixed processing effect requirements).

[0049] Specifically, the process of determining the quality of each level of equipment in the oilfield produced water compact separation equipment 4 is as follows: Under the same processing capacity condition, each level of equipment is determined according to the value of the comprehensive evaluation index (=comprehensive evaluation index / equipment processing capacity).

[0050] Most oilfield platforms can be roughly divided into three levels of equipment (pretreatment equipment, oil removal equipment, and deep treatment equipment) according to the treatment equipment added for different types of oilfield production water. After evaluating the difficulty of oilfield production water treatment on each platform using various production water treatment methods, the advantages and disadvantages of different production water treatment methods at this treatment stage can be obtained, and recommendations can be made accordingly.

[0051] The above embodiments are only used to illustrate the present invention, wherein the structure, connection mode and manufacturing process of each component may be changed. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A performance evaluation and testing system for compact separation equipment of offshore oilfield produced water, characterized in that: include: The separation performance test module is used to test the separation performance of the produced water of the oil field through the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field based on the oil field water treatment requirements, test the operation of the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field under different working conditions, and obtain the separation performance test results of each level of equipment in the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field; A database module for storing oil field information and separation performance test results of oil field original production water treatment equipment and oil field production water compact separation equipment; The test result analysis module is used to analyze the oilfield original production water treatment equipment and the oilfield production water compact separation equipment according to the data stored in the database module, and calculate the equipment treatment effect, land occupation and processing volume comprehensive indicators, comprehensive energy consumption and ton of water treatment cost of each level of equipment in the oilfield original production water treatment equipment and the oilfield production water compact separation equipment.

2. The offshore oilfield production water compact separation equipment performance evaluation test system according to claim 1, characterized in that: The oilfield produced water compact separation equipment comprises a water inlet pipe, a primary separator, a secondary oil remover, a tertiary depth separator, a water outlet pipe and an oil outlet pipe, wherein the primary separator, the secondary oil remover and the tertiary depth separator are fixedly arranged on the same skid, and the reagent is selectively added at different positions of the oilfield produced water compact separation equipment according to the oilfield water quality characteristics; One end of the water inlet pipe is connected to the production water inlet, and the other end of the water inlet pipe is connected to the tertiary depth separator through the primary separator and the secondary oil remover in sequence. The primary separator is used to remove part of the gas, suspended oil and dispersed oil in the production water; the secondary oil remover is used to remove part of the emulsified oil droplets and suspended particles in the production water; the tertiary depth separator is used to remove the oil droplets and suspended particles in the production water to obtain purified water; the water phase outlet of the tertiary depth separator is connected to the water outlet pipe, and the oil phase outlet of the tertiary depth separator is connected to the platform closed drain tank or the dirty oil tank through the oil outlet pipe.

3. The offshore oilfield produced water compact separation equipment performance evaluation test system as claimed in claim 2, characterized in that: The first-stage separator adopts a multi-stage cyclone separator, the second-stage oil remover adopts a coalescence demulsification oil remover, and the third-stage depth separator adopts a heterogeneous particle depth separator.

4. The offshore oilfield production water compact separation equipment performance evaluation test system as claimed in claim 2, characterized in that: The added agents include reverse demulsifier, demulsifier, flocculant, water purifier, antiscalant or bactericide, and are added at corresponding positions of the oilfield production water compact separation device 4 according to the different effects of the agents.

5. The offshore oilfield production water compact separation equipment performance evaluation test system as claimed in claim 1, characterized in that: The information of the oil field includes the oil products and water quality of the oil field. The separation performance test results of the original production water treatment equipment of the oil field and the compact production water separation equipment of the oil field include the size, weight, production water residence time, type and volume of consumed chemicals, processing capacity, power consumption, changes in oil content and suspended solids content at the outlet of each level of equipment, whether chemicals are added and the consumption of chemicals, as well as equipment design indicators, engineering consumption, economic investment, type and volume of chemicals consumed, and price of chemicals.

6. A method for evaluating the performance of a compact separation device for producing water in an offshore oil field, characterized in that: include: According to the requirements of the oil field, the oil field production water compact separation equipment is transported to the designated location and installed; The database module obtains the information of the oil field and the data of the original production water treatment equipment of the oil field; The separation performance test module conducts separation performance test on the produced water of the oil field through the oil field produced water compact separation equipment, and tests the operation of the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field under different working conditions. When the test time reaches a certain number of days, the separation performance test results of the original produced water treatment equipment of the oil field and the compact produced water separation equipment of the oil field in this separation performance test are obtained; The database module records the separation performance test results of the oilfield original production water treatment equipment and the oilfield production water compact separation equipment; The test result analysis module analyzes the original oilfield production water treatment equipment and the oilfield production water compact separation equipment based on the data recorded by the database module, and calculates the equipment treatment effect, land occupation and processing volume comprehensive indicators, comprehensive energy consumption and ton of water treatment cost of each level of equipment in the oilfield production water compact separation equipment.

7. A method for evaluating the performance of a compact separation device for producing water in an offshore oil field as claimed in claim 6, characterized in that: The comprehensive indicators of the area occupied and the processing capacity of each level of equipment in the oilfield production water compact separation equipment include area evaluation parameters and volume evaluation parameters : in, is the average flow rate; is the equipment skid area; It is the volume of the equipment skid.

8. A method for evaluating the performance of a compact separation device for producing water in an offshore oil field as claimed in claim 6, characterized in that: The comprehensive energy consumption of each level of equipment in the oilfield production water compact separation equipment is: In the formula, is the comprehensive energy consumption; is the number of energy types consumed; The actual consumption during production and / or cleaning Amount of energy; For the The standard cost of the energy source.

9. A method for evaluating the performance of a compact separation device for producing water in an offshore oil field as claimed in claim 6, characterized in that: The water treatment cost per ton of equipment at each level in the oilfield production water compact separation equipment is: In the formula, is the cost of treating a ton of water; For comprehensive processing costs; To treat sewage volume.

10. A method for evaluating the performance of a compact separation device for producing water in an offshore oil field as claimed in claim 6, characterized in that: The information of the oil field includes the oil products and water quality of the oil field. The separation performance test results of the original production water treatment equipment of the oil field and the compact production water separation equipment of the oil field include the size, weight, production water residence time, type and volume of consumed chemicals, processing capacity, power consumption, changes in oil content and suspended solids content at the outlet of each level of equipment, whether chemicals are added and the consumption of chemicals, as well as equipment design indicators, engineering consumption, economic investment, type and volume of chemicals consumed, and price of chemicals.

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