Mixed crude oil configuration method and device

Abstract

The embodiments of this specification provide a method and device for configuring a mixed crude oil. The method includes: simulating the mixing process of at least two preset categories of oil products according to the actual size and operating parameters of the oil product mixing equipment at the engineering site, and obtaining a first mixing unevenness of the mixed oil products at different flow times; simulating the at least two preset categories of oil products according to the shape and size of the stirring equipment used to configure the mixed crude oil, and obtaining a second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring equipment; when the second mixing uniformity is equal to the first mixing uniformity, obtaining the stirring time corresponding to the different stirring rates, so as to configure the mixed crude oil with the same mixing state as the engineering site according to the stirring time corresponding to the different stirring rates, thereby improving the configuration efficiency of the mixed crude oil.

Description

Technical Field

[0001] The embodiments of this specification relate to the technical field of heavy oil dilution, and more particularly to a method and device for preparing mixed crude oil. Background Art

[0002] It is often necessary to mix two or more oil products at the construction site. This process can be used for crude oil treatment processes such as heavy oil dilution and viscosity reduction transportation, oil product modification by adding chemicals, etc. Among them, the heavy oil dilution process is a common method for long-distance transportation of heavy oil. By adding a thin oil with lower viscosity to the heavy oil, the two are integrated with each other according to the principle of similar compatibility, diluting the heavy oil, reducing the concentration of colloid and asphaltene in the heavy oil, enhancing fluidity, and thus reducing the viscosity of the heavy oil.

[0003] In the process of heavy oil dilution, the commonly used diluents are thin crude oil, condensate oil, diesel, etc., and the diluted mixed oil can be transported using ordinary crude oil pipelines. The heavy oil dilution process can be achieved by using an agitator in the oil tank or placing a mixer in the pipeline.

[0004] The heavy oil dilution method is simple to operate and has a significant viscosity reduction effect. The solidification point of the mixed oil after dilution is lower than that of the thin oil. The friction loss along the long-distance transportation is greatly reduced, so that the heavy oil can be transported over long distances with low energy consumption. However, the density and viscosity of the blended thin oil directly affect the viscosity reduction effect. The specific influence law requires taking mixed crude oils with different thick-thin ratios for multiple groups of experiments to study the viscosity reduction law of the thick-thin ratio, the density of the blended thin oil and the viscosity of the thin oil. This requires multiple sampling on site, which is time-consuming and labor-intensive and is subject to many constraints. Summary of the invention

[0005] The purpose of the embodiments of this specification is to provide a mixed crude oil configuration method and device to improve the configuration efficiency of the mixed crude oil.

[0006] To solve the above problems, an embodiment of the present specification provides a method for configuring a mixed crude oil, the method comprising: obtaining the actual size and operating parameters of an oil product mixing device at a construction site; simulating the mixing process of at least two preset categories of oil products according to the actual size and operating parameters of the oil product mixing device at the construction site, and obtaining a first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness characterizes the mixing state of the mixed oil products; simulating the at least two preset categories of oil products according to the shape and size of a stirring device used to configure the mixed crude oil, and obtaining a second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring device; when the second mixing uniformity is equal to the first mixing uniformity, obtaining the stirring times corresponding to the different stirring rates, so as to configure the mixed crude oil with the same mixing state as that at the construction site according to the stirring times corresponding to the different stirring rates.

[0007] To solve the above problems, an embodiment of the present specification also provides a mixed crude oil configuration device, the device comprising: an acquisition module, used to acquire the actual size and operating parameters of the oil product mixing equipment at the engineering site; a first simulation module, used to simulate the mixing process of at least two preset categories of oil products according to the actual size and operating parameters of the oil product mixing equipment at the engineering site, and obtain a first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness characterizes the mixing state of the mixed oil products; a second simulation module, used to simulate the at least two preset categories of oil products according to the shape and size of the stirring equipment used to configure the mixed crude oil, and obtain a second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring equipment; an acquisition module, used to obtain the stirring time corresponding to the different stirring rates when the second mixing uniformity is equal to the first mixing uniformity, so as to configure the mixed crude oil with the same mixing state as the engineering site according to the stirring time corresponding to the different stirring rates.

[0008] It can be seen from the technical solutions provided in the above embodiments of this specification that in the embodiments of this specification, the actual size and operating parameters of the oil product mixing equipment at the engineering site can be obtained; according to the actual size and operating parameters of the oil product mixing equipment at the engineering site, the mixing process of at least two preset categories of oil products is simulated to obtain the first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness characterizes the mixing state of the mixed oil products; according to the shape and size of the stirring equipment used to configure the mixed crude oil, the at least two preset categories of oil products are simulated, and the second mixing unevenness of the mixed crude oil at different flow times is obtained through the process of configuring the mixed crude oil at different stirring rates of the stirring equipment; when the second mixing uniformity is equal to the first mixing uniformity, the stirring time corresponding to the different stirring rates is obtained, so as to configure the mixed crude oil with the same mixing state as the engineering site according to the stirring time corresponding to the different stirring rates. The mixed crude oil configuration method provided in the embodiments of this specification uses at least two different oil products, supplemented by simulation results, to prepare heterogeneous oil mixed crude oil with the same mixing state as the engineering site in the laboratory, avoiding the situation of returning to the site for sampling multiple times due to the need for experiments, thereby improving the configuration efficiency of the mixed crude oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1This is a flow chart of a mixed crude oil configuration method according to an embodiment of this specification;

[0011] Figure 2 This is a functional module diagram of a mixed crude oil configuration device according to an embodiment of this specification. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0013] In the examples of this specification, heavy oil refers to Crude oil. Heavy oil is an important component of global petroleum hydrocarbon energy. Heavy oil is difficult to mine and transport due to its high viscosity and large flow resistance. It is characterized by high content of asphaltene and colloid. In order to facilitate the transportation and mining of heavy oil, it is usually necessary to reduce the viscosity of heavy oil, that is, to reduce the viscosity of heavy oil. Currently, the commonly used viscosity reduction methods include heating method, diluent oil blending method, heavy oil modification method and chemical agent method.

[0014] Among them, the thin oil blending method mainly utilizes similar compatibility properties and dilution principles to effectively reduce the viscosity and density of heavy oil. Among them, thin oil can be an oil product with lower viscosity than heavy oil. After thin oil is blended into heavy oil, the relative content of colloid asphalt in heavy oil is reduced, and the light components in thin oil cause a certain degree of damage to the tightly packed colloid structure, which is manifested as a decrease in the viscosity of heavy oil in macroscopic terms. The operation of the thick oil thinning method is simple and has a significant viscosity reduction effect. The solidification point of the mixed oil after thinning is lower than that of thin oil. The friction loss along the way is greatly reduced during long-distance transportation, so that heavy oil can be transported over long distances with low energy consumption. However, the density and viscosity of the thin oil directly affect the viscosity reduction effect. The specific influence law requires taking mixed crude oils with different thick-thin ratios for multiple groups of experiments to study the viscosity reduction law of the thick-thin ratio, the density of the thin oil blended, and the viscosity of the thin oil. This requires multiple sampling on site, which is time-consuming and labor-intensive, and is subject to many conditions.

[0015] Considering that if the mixing process of different oil products at the engineering site is simulated by simulation software, and the mixing state of the oil products is determined by calculating the index characterizing the mixing state of the oil products, and then the mixing process of different oil products in the laboratory is simulated by simulation software, when the index characterizing the mixing state of the oil products is the same, the mixing state of different oil products at the engineering site and in the laboratory can be associated, it is expected to solve the problem of multiple samplings on site in the prior art, which is time-consuming and labor-intensive, and improve the configuration efficiency of mixed crude oil with the same mixing state as the engineering site. Based on this, the embodiment of this specification provides a mixed crude oil configuration method.

[0016] In the embodiments of this specification, the subject that executes the mixed crude oil configuration method can be an electronic device with a logic operation function, the electronic device can be a server or a client, and the client can be a desktop computer, a tablet computer, a laptop computer, a workstation, etc. Of course, the client is not limited to the above-mentioned electronic device with a certain entity, and it can also be software running in the above-mentioned electronic device. It can also be a program software formed by program development, and the program software can run in the above-mentioned electronic device.

[0017] Figure 1 This is a flow chart of a mixed crude oil configuration method according to an embodiment of this specification. Figure 1 As shown, the mixed crude oil preparation method may include the following steps.

[0018] S110: Obtain the actual size and operating parameters of the oil mixing equipment at the project site.

[0019] In some embodiments, different engineering site oil products may generally include different oil product mixing equipment. The oil product mixing equipment is used to mix a variety of different oil products, for example, the oil product mixing equipment is used in the process of diluting heavy oil. The oil product mixing equipment may generally include at least one heavy oil inlet, at least one thin oil inlet and a mixed oil outlet. The heavy oil inlet is used to output heavy oil, the thin oil inlet is used to input thin oil, and the mixed oil outlet is used to output the mixed heavy oil and thin oil.

[0020] In some embodiments, the oil product mixing device may include an SK type mixer and a reducing pipe. The SK type mixer is also called a single spiral static mixer, and its unit is a spiral plate twisted 180° or 270°, and when installed in a pipe shell, adjacent spiral plates are left-handed and right-handed respectively.

[0021] In some embodiments, the oil product mixing device is usually operated based on certain operating parameters, which may include parameters such as the speed of the heavy oil inlet inputting heavy oil, the speed of the light oil inlet inputting light oil, and the temperature.

[0022] In some embodiments, the server may use any method to obtain the actual size and operating parameters of the oil product mixing equipment at the engineering site. For example, the user may directly send the actual size and operating parameters of the oil product mixing equipment at the engineering site to the server, and the server may receive them; for example, other electronic devices other than the server may send the actual size and operating parameters of the oil product mixing equipment at the engineering site to the server, and the server may receive them. In the embodiments of this specification, the method used by the server to obtain the actual size and operating parameters of the oil product mixing equipment at the engineering site is not limited.

[0023] S120: According to the actual size and operating parameters of the oil mixing equipment at the engineering site, simulate the mixing process of at least two preset categories of oil products to obtain a first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness represents the mixing state of the mixed oil products.

[0024] In some embodiments, the mixing process of at least two preset categories of oil products can be simulated by simulation software to obtain the first mixing unevenness of the mixed oil products at different flow times. Specifically, a first simulation model can be established according to the actual size of the oil product mixing equipment at the engineering site; the operating parameters are used as simulation parameters, and the mixing process of at least two preset categories of oil products is simulated using the first simulation model to obtain the first mixing unevenness of the mixed oil products at different flow times.

[0025] In some embodiments, SOLIDWORKS software and ANSYS software can be used to establish a first simulation model that is consistent with the size of the oil mixing equipment at the engineering site. Specifically, corresponding parameters, such as the shape and size parameters of the oil mixing equipment, can be input into the SOLIDWORKS software to establish a model, and then the established model is imported into the ANSYS software to establish the first simulation model. Among them, the SOLIDWORKS software is a three-dimensional CAD system developed based on Windows; the ANSYS software is a large-scale general-purpose finite element analysis software that integrates structure, fluid, electric field, magnetic field, and acoustic field analysis. The ANSYS software can interface with most CAD software to achieve data sharing and exchange, such as Pro / Engineer, NASTRAN, Alogor, I-DEAS, AutoCAD, etc.

[0026] In some embodiments, the at least two preset categories of oil products include at least one thick oil and at least one thin oil. The thin oil may be an oil product with relatively low viscosity, such as thin crude oil, condensate oil, diesel oil, etc.

[0027] In some embodiments, the at least two preset categories of oil products may be simulated by setting the density of the oil products and the dynamic viscosity of the oil products in the simulation model.

[0028] When studying the mixing of different oil products in the laboratory, it is generally necessary to study the rheological properties and physical properties of mixed oils with different mixing ratios and temperatures. There are many types of mixed oil samples and a large amount of experiments, which leads to slow progress in research. Therefore, the mixing unevenness can be used to characterize the mixing state of mixed oils, thereby improving the research efficiency of oil mixing. Specifically, the average value of the volume fraction of an oil product on a certain section mainly depends on the inflow flow rate of different oil products. Under the condition that the flow state is stable, the average value of the volume fraction of an oil product on the section can basically remain stable. Therefore, the more uneven the mixing of heterogeneous oils on a certain section, the greater the difference between the volume fraction at a certain point on the section and the average value, resulting in a larger mixing unevenness value. According to the volume fraction of an oil product on a certain section in the model, the mixing unevenness value of the section can be obtained, and its expression is:

[0029]

[0030] in, Indicates the mixing unevenness, c i represents the volume fraction of a type of oil at the i-th point on the cross section, i = 1, 2…n, It represents the average volume fraction of an oil product on the cross section, and n represents the number of points on the cross section.

[0031] S130: simulating the at least two preset categories of oil products according to the shape and size of the stirring device used to configure the mixed crude oil, and obtaining a second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring device.

[0032] In some embodiments, the at least two preset categories of oil products can be simulated by simulation software, and the second mixing unevenness of the mixed crude oil at different flow times can be obtained through the process of configuring the mixed crude oil at different stirring rates of the stirring device. Specifically, a second simulation model can be established according to the shape and size of the stirring device used to configure the mixed crude oil; the at least two preset categories of oil products can be simulated using the second simulation model, and the second mixing unevenness of the mixed crude oil at different flow times can be obtained through the process of configuring the mixed crude oil at different stirring rates of the stirring device.

[0033] In some embodiments, at least two preset categories of oil products simulated by the second simulation model are the same as at least two preset categories of oil products simulated by the first simulation model, that is, the same oil density and oil dynamic viscosity are set to simulate the at least two preset categories of oil products.

[0034] In some embodiments, the process of configuring the mixed crude oil at different stirring rates of the stirring device can be simulated, for example, the process of configuring the mixed crude oil at 1000 r / min, 2000 r / min or other stirring rates of the stirring device can be simulated respectively, and the second mixing unevenness of the mixed crude oil at different flow times at different stirring rates can be calculated according to the expression of mixing unevenness.

[0035] S140: When the second mixing uniformity is equal to the first mixing uniformity, the stirring times corresponding to different stirring rates are obtained, so as to configure the mixed crude oil having the same mixing state as that at the engineering site according to the stirring times corresponding to the different stirring rates.

[0036] In some embodiments, when the second mixing uniformity is equal to the first mixing uniformity, the stirring time corresponding to different stirring rates can be obtained. For example, when the first mixing uniformity is x, and the second mixing uniformity is also equal to x, the stirring time corresponding to a stirring rate of 1000 r / min and the stirring time corresponding to 2000 r / min can be obtained, so as to configure the mixed crude oil with the same mixing state as the engineering site according to the stirring time corresponding to different stirring rates.

[0037] The mixed crude oil configuration method provided in the embodiment of this specification can obtain the actual size and operating parameters of the oil mixing equipment at the engineering site; according to the actual size and operating parameters of the oil mixing equipment at the engineering site, simulate the mixing process of at least two preset categories of oil products, and obtain the first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness characterizes the mixing state of the mixed oil products; according to the shape and size of the stirring equipment used to configure the mixed crude oil, simulate the at least two preset categories of oil products, and obtain the second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring equipment; when the second mixing uniformity is equal to the first mixing uniformity, obtain the stirring time corresponding to the different stirring rates, so as to configure the mixed crude oil with the same mixing state as the engineering site according to the stirring time corresponding to the different stirring rates. The mixed crude oil configuration method provided in the embodiment of this specification, using at least two different oil products, supplemented by simulation results, can prepare heterogeneous oil mixed crude oil with the same mixing state as the engineering site in the laboratory, avoiding the situation of returning to the site for sampling multiple times due to the need for experiments, thereby improving the configuration efficiency of the mixed crude oil.

[0038] In order to better understand the mixed crude oil configuration method provided in the embodiment of this specification, the embodiment of this specification also provides a scenario example. In this scenario example, the software used includes SOLIDWORKS and ANSYS 19.2.

[0039] In this scenario example, two different oils can be used as base oils and CFD simulation can be used. Specifically, use modeling software such as SOLIDWORKS to build a model that is consistent with the actual equipment size at the project site, import the built model into meshing software such as ICEM CFD for meshing and output the mesh file, use solution software such as Fluent to read the mesh file and set relevant solution parameters according to the equipment operating conditions at the project site for solution calculation, and use post-processing software such as CFD Post to post-process the solved data file to export the volume fraction of a certain oil product in the key section and calculate its mixing unevenness as the characterization parameter of the mixing state of heterogeneous oil products at the project site. Use the same method to determine the characterization parameters of the mixing state of heterogeneous oil products at different stirring rates and different stirring times in the laboratory through simulation. When the characterization parameters of the two are the same, the mixing state of heterogeneous oil products at the project site can be associated with that of the laboratory.

[0040] In this scenario example, the mixing state of heavy and thin oils under large flow conditions at the engineering site is simulated as follows: through on-site investigation of the actual size and operating status of a heavy oil blending and thinning equipment at an oil depot, it can be known that the on-site oil mixing equipment includes two SK-type mixers and reducing pipes; SOLIDWORKS software is used to establish a model according to the investigated dimensions; the established model is imported into ICEMCFD to set the heavy oil inlet, thin oil inlet and mixed oil outlet, divide the grid and export the msh (grid) file; the msh (grid) file is imported into Fluent software, in General, Solver Type is Pressure-Based, SolverVelocity Formulation is Absolute, SolverTime is Transient, Gravity is checked, and Gravitational is set according to the model characteristics. In Acceleration, set Z to 9.81 and the rest to 0. In Models, turn on Multiphase, check Mixture, and set Number of Eulerian Phases to 2. Turn on Viscous, check k-epsilon(2eqn) in Model, check Realizable in k-epsilonModel, and check Standard Wall Functions in Near-Wall Treatment. In Materials, select fuel-oil-liquid and change its density to 930kg / m 3, change its dynamic viscosity to 0.2kg / (m·s), as the heavy oil phase, select gasoil-liquid and change its density to 850kg / m 3 , change its dynamic viscosity to 0.03kg / (m·s) as the thin oil phase; in Boundary Conditions, set the thin oil velocity at the thin oil inlet to 0.71m / s, the heavy oil to 0, set the heavy oil velocity at the heavy oil inlet to 2.83m / s, the thin oil velocity to 0, set the outlet Phase to mixture, and Flow Rate Weighting to 1; adjust the control factor, initialize the flow field, set the time step and calculation steps according to the grid and model size, set the calculation results to be saved every 500 steps and start the calculation. After the calculation is completed, import the data file into CFD-Post software for post-processing, export the heavy oil volume fraction on the outlet section at different flow times, calculate the mixing unevenness on the outlet section at different flow times, and the statistics are shown in Table 1. In the first 15s, the oil flow did not flow from the inlet to the outlet.

[0041] Table 1

[0042] Flow time(s) Mixing unevenness 15 0.119518771 17.5 0.205335554 20 0.138616104 22.5 0.085294278 25 0.058862380 27.5 0.047652381 30 0.042864437 32.5 0.041517766 35 0.041204589 37.5 0.041168550 40 0.041647057 42.5 0.041678321 45 0.041255947 47.5 0.041709606 49.34 0.041272941 50 0.041274621

[0043] It can be seen from Table 1 that the mixing unevenness under this condition can be taken as 0.041204589, that is, according to the simulation results, the mixing unevenness of thick and thin oil mixture under large flow conditions at the engineering site can be reduced to 0.041204589, and the flow time is 35s.

[0044] In this scenario example, the process of simulating the mixing state of thick and thin oil in the laboratory is as follows: Investigate the actual size and shape of the thick oil blending and diluting mixing equipment in the laboratory, use SOLIDWORKS software to build a model according to the investigated size, import the established model into ICEM CFD to divide the mesh and export the msh (mesh) file, import the msh (mesh) file into Fluent software, in General, Solver Type (solution method) is Pressure-Based (pressure-based), SolverVelocity Formulation (speed equation) is Absolute (absolute), Solver Time (solution mode) is Transient (transient), check Gravity (gravity), and set Y in Gravitational Acceleration (gravitational acceleration) to 9.81 according to the model characteristics, and the rest are 0; in Models (model), open Multiphase (multiphase), check Eulerian (Eulerian model), and set Number of Eulerian Set Phases to 3, turn on Viscous, check k-epsilon(2eqn) in Model, check RNG in k-epsilon Model, check StandardWall Functions in Near-Wall Treatment; in Materials, select fuel-oil-liquid and change its density to 930kg / m 3 , change its dynamic viscosity to 0.2kg / (m·s), as the heavy oil phase, select gasoil-liquid and change its density to 850kg / m 3, change its dynamic viscosity to 0.03kg / (m·s) as the thin oil phase; in Boundary Conditions, set wall1 (wall 1, i.e., impeller wall) to Moving Wall, check Relative to Adjacent Cell Zone in Motion, set Speed ​​(rpm) to 1000, check Rotational, and set Y (mm) to 30 and Y to 90; in order to compare with the example of the simulated engineering site, set the lower layer in the model space to heavy oil and the upper layer to thin oil, and the two layers with different densities occupy the entire container space; select the appropriate solution method and control factor, initialize the flow field, set the time step and number of calculation steps according to the grid and model size, set the calculation results to be saved every 1000 steps and start the calculation. After the calculation is completed, the data file is imported into CFD-Post software for post-processing, the heavy oil volume fraction on the vertical section of the model with different flow time is exported, and the mixing unevenness on the outlet section with different flow time is calculated. The statistics are shown in Table 2.

[0045] Table 2

[0046]

[0047]

[0048] Among them, Table 2 shows the data of the mixing unevenness changing with the stirring time when the stirring speed of the stirring equipment is 1000r / min.

[0049] In this scenario example, the stirring rate of the stirring equipment can be changed to 2000r / min, and the simulation of the laboratory thick and thin oil mixing can be repeated to obtain the variation of the mixing unevenness with the stirring time as shown in Table 3.

[0050] Table 3

[0051] Stirring time(s) Mixing unevenness 10 0.484840744 20 0.215343605 30 0.104734663 40 0.053682443 50 0.028346447 60 0.015558499 70 0.008907259 80 0.005549907 90 0.003911161 100 0.002887609 110 0.002314298 120 0.002120863

[0052] After simulating the mixed state of thick and thin oil at the engineering site, it is known that the mixed unevenness is 0.041204589. By comparing the mixed state simulation of thick and thin oil stirred in the laboratory at 1000r / min and 2000r / min, it is found by interpolation that at 1000r / min, it takes about 88s to reduce the mixed unevenness to 0.041204589, and at 2000r / min, it takes about 45s to reduce the mixed unevenness to 0.041204589. At this point, the simulation of thick and thin mixed oil prepared in the laboratory can be associated with the simulation of the mixed state of thick and thin mixed oil at the engineering site, so that the mixed crude oil of different oil products consistent with the mixing state of the engineering site can be prepared in the laboratory, avoiding the situation of returning to the site for sampling many times due to the need for experiments, thereby improving the configuration efficiency of mixed crude oil.

[0053] See also Figure 2 At the software level, the embodiments of this specification also provide a mixed crude oil configuration device, which may specifically include the following structural modules.

[0054] An acquisition module 210 is used to acquire the actual size and operating parameters of the oil mixing equipment at the engineering site;

[0055] The first simulation module 220 is used to simulate the mixing process of at least two preset categories of oil products according to the actual size and operating parameters of the oil product mixing equipment at the engineering site, and obtain a first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness represents the mixing state of the mixed oil products;

[0056] The second simulation module 230 is used to simulate the at least two preset categories of oil products according to the shape and size of the stirring device used to configure the mixed crude oil, and obtain the second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring device;

[0057] The obtaining module 240 is used to obtain the stirring time corresponding to different stirring rates when the second mixing uniformity is equal to the first mixing uniformity, so as to configure the mixed crude oil with the same mixing state as the engineering site according to the stirring time corresponding to the different stirring rates.

[0058] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment and the equipment embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0059] After reading this specification, those skilled in the art can conceive of any combination of some or all of the embodiments listed in this specification without creative work, and these combinations are also within the scope of disclosure and protection of this specification.

[0060] In the 1990s, improvements to a technology could be clearly distinguished as hardware improvements (for example, improvements to the circuit structure of diodes, transistors, switches, etc.) or software improvements (improvements to the method flow). However, with the development of technology, many improvements to the method flow today can be regarded as direct improvements to the hardware circuit structure. Designers almost always obtain the corresponding hardware circuit structure by programming the improved method flow into the hardware circuit. Therefore, it cannot be said that an improvement in a method flow cannot be implemented using a hardware entity module. For example, a programmable logic device (PLD) (such as a field programmable gate array (FPGA)) is such an integrated circuit whose logical function is determined by the user's programming of the device. Designers can "integrate" a digital system on a PLD by programming it themselves, without having to ask a chip manufacturer to design and produce a dedicated integrated circuit chip. Moreover, nowadays, instead of manually making integrated circuit chips, this kind of programming is mostly implemented by "logic compiler" software, which is similar to the software compiler used when developing and writing programs, and the original code before compilation must also be written in a specific programming language, which is called hardware description language (HDL). There is not only one HDL, but many kinds, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc. The most commonly used ones are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog2. Those skilled in the art should also know that it is only necessary to program the method flow slightly in the above-mentioned hardware description languages ​​and program it into the integrated circuit, and then it is easy to obtain the hardware circuit that implements the logic method flow.

[0061] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0062] It can be known from the above description of the implementation mode that the technicians in this field can clearly understand that the present specification can be implemented by means of software plus the necessary general hardware platform. Based on such an understanding, the technical solution of the present specification can be essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present specification or some parts of the embodiments.

[0063] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0064] This specification can be used in many general or special computer system environments or configurations, such as personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronic devices, network PCs, minicomputers, mainframe computers, and distributed computing environments that include any of the above systems or devices.

[0065] This specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0066] Although the present specification is described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present specification without departing from the spirit of the present specification, and it is intended that the appended claims include these modifications and changes without departing from the spirit of the present specification.

Claims

1. A method for preparing a mixed crude oil, characterized in that: The method comprises: Obtain the actual size and operating parameters of the oil mixing equipment at the project site; According to the actual size and operating parameters of the oil mixing equipment at the engineering site, a mixing process of at least two preset categories of oil products is simulated to obtain a first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness represents the mixing state of the mixed oil products; Simulating the at least two preset categories of oil products according to the shape and size of the stirring device used to prepare the mixed crude oil, and obtaining a second mixing unevenness of the mixed crude oil at different flow times through the process of preparing the mixed crude oil at different stirring rates of the stirring device; When the second mixing unevenness is equal to the first mixing unevenness, the stirring times corresponding to different stirring rates are obtained, so as to configure the mixed crude oil having the same mixing state as that at the engineering site according to the stirring times corresponding to the different stirring rates; The first mixing unevenness and the second mixing unevenness are calculated according to the following formula: in, Indicates the mixing unevenness, c i represents the volume fraction of a type of oil at the i-th point on the cross section, i = 1, 2…n, It represents the average volume fraction of an oil product on the cross section, and n represents the number of points on the cross section.

2. The method according to claim 1, characterized in that The oil product mixing equipment on the engineering site includes an SK-type mixer and a pipe of a different diameter.

3. The method according to claim 1, characterized in that The at least two preset categories of oil products include at least one heavy oil and at least one light oil.

4. The method according to claim 1, characterized in that The operating parameters at least include a speed at which the heavy oil inlet inputs the heavy oil and a speed at which the thin oil inlet inputs the thin oil.

5. The method according to claim 1, characterized in that: The at least two preset categories of oil products are simulated by setting the density of the oil products and the dynamic viscosity of the oil products.

6. The method according to claim 1, characterized in that According to the actual size and operating parameters of the oil product mixing equipment at the engineering site, simulating the mixing process of at least two preset categories of oil products to obtain the first mixing unevenness of the mixed oil products at different flow times includes: Establishing a first simulation model according to the actual size of the oil mixing equipment at the engineering site; The operating parameters are used as simulation parameters, and the first simulation model is used to simulate the mixing process of at least two preset categories of oil products to obtain a first mixing unevenness of the mixed oil products at different flow times.

7. The method according to claim 1, characterized in that The at least two preset categories of oil products are simulated according to the shape and size of the stirring device used to configure the mixed crude oil, and the second mixing unevenness of the mixed crude oil at different flow times is obtained by configuring the mixed crude oil at different stirring rates of the stirring device, including: Establishing a second simulation model according to the shape and size of the mixing equipment used to configure the mixed crude oil; The second simulation model is used to simulate the at least two preset categories of oil products, and the second mixing unevenness of the mixed crude oil at different flow times is obtained through the process of configuring the mixed crude oil at different stirring rates of the stirring device.

8. The method according to claim 6 or 7, characterized in that: The first simulation model and the second simulation model were established using SOLIDWORKS software and ANSYS software.

9. A mixed crude oil preparation device, characterized in that: The device comprises: Acquisition module, used to obtain the actual size and operating parameters of the oil mixing equipment at the project site; A first simulation module is used to simulate the mixing process of at least two preset categories of oil products according to the actual size and operating parameters of the oil product mixing equipment at the engineering site, and obtain a first mixing unevenness of the mixed oil products at different flow times; the mixing unevenness represents the mixing state of the mixed oil products; A second simulation module is used to simulate the at least two preset categories of oil products according to the shape and size of the stirring device used to configure the mixed crude oil, and obtain a second mixing unevenness of the mixed crude oil at different flow times through the process of configuring the mixed crude oil at different stirring rates of the stirring device; an obtaining module, for obtaining stirring times corresponding to different stirring rates when the second mixing unevenness is equal to the first mixing unevenness, so as to configure a mixed crude oil having the same mixing state as that at the engineering site according to the stirring times corresponding to the different stirring rates; The first mixing unevenness and the second mixing unevenness are calculated according to the following formula: in, Indicates the mixing unevenness, c i represents the volume fraction of a type of oil at the i-th point on the cross section, i = 1, 2…n, It represents the average volume fraction of an oil product on the cross section, and n represents the number of points on the cross section.

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