Mixture acquisition device, solubility measurement method, and measurement system

Abstract

The embodiment of the invention provides a mixture obtaining device, a solubility measuring method and a solubility measuring system, and belongs to the field of thickened oil development. The mixture obtaining device comprises a container cylinder which is fixedly installed at a preset position and used for containing a target dose of thick oil; the solvent pump is used for injecting a specific dosage of solvent into the container cylinder so as to form a mixture of the solvent and the thickened oil in the container cylinder; the stirring device is arranged in the container cylinder and is used for stirring the solvent and the thickened oil in the container cylinder so as to accelerate the dissolution of the solvent; and the sampler is detachably arranged at one end of the container cylinder and is used for sampling the mixture. The method can effectively shorten the balance time of the solvent and the thickened oil, and achieves the purpose of measuring the solubility under the preset condition in a short time.

Description

Technical Field

[0001] The invention relates to the technical field of heavy oil development, and in particular to a mixture acquisition device, a solubility determination method and a determination system. Background Art

[0002] In addition to electric heating or steam injection development, heavy oil or oil sand projects sometimes need to inject solvents for auxiliary dilution, dissolution and viscosity reduction development. Solvent-assisted heavy oil development technology has been a research hotspot in the past two decades, and a series of development technologies have been formed, including: circulating solvent similar to steam stimulation (CSP), liquid phase solvent-assisted steam stimulation (LASER), low temperature solvent-assisted gravity drainage (Vapex), solvent-assisted SAGD (ES-SAGD) and medium temperature solvent-assisted gravity drainage (Nsolv). The types of solvents used vary greatly, including single-component propane, butane, pentane, hexane, etc., as well as multi-component diluents, condensate, aviation kerosene and other synthetic solvents. In addition, the temperature and pressure range conditions are also relatively wide. The solubility determination results of solvents in heavy oil are one of the key factors in determining solvent selection and numerical simulation optimization design (phase equilibrium constant and flash calculation).

[0003] The experimental device of the traditional solubility test method is large in scale, and because it takes a long time for the solvent and the heavy oil to reach equilibrium (up to several hours to several days) and there is a problem of insufficient stirring, it often consumes a lot of labor and time. At the same time, because the traditional experimental device must flip the container barrel as a whole, it will be affected by the pipeline and cannot make the heavy oil and the solvent reach equilibrium in a short time. Therefore, the experimental device cannot measure the solubility under different pressures in a short time. Therefore, a small test device is urgently needed to shorten the time for the solvent and the heavy oil to reach equilibrium, and to achieve the purpose of measuring the solubility under different pressures in a short time. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a mixture acquisition device, a solubility determination method and a determination system, which solves the problems of being unable to achieve equilibrium between heavy oil and solvent in a short time and being unable to measure solubility under different preset conditions in a short time.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a mixture acquisition device, which includes: a container barrel, fixedly installed at a preset position, for accommodating a target dose of thick oil; a solvent pump, for injecting a specific dose of solvent into the container barrel to form a mixture of solvent and thick oil in the container barrel; a stirring device, which is arranged in the container barrel and is used to stir the solvent and thick oil in the container barrel to accelerate the dissolution of the solvent; and a sampler, which is detachably arranged at one end of the container barrel and is used to sample the mixture.

[0006] Optionally, the stirring device includes: a rotating impeller, located in the container barrel, and the depth of the rotating impeller in the container barrel is a first preset proportion of the depth of the target dose of heavy oil; and a rotating rod, the rotating impeller is mounted on one end of the rotating rod, and the other end of the rotating rod is fixed to the top end of the container barrel.

[0007] Optionally, the size of the rotary impeller is a second preset ratio of the diameter of the container barrel.

[0008] Optionally, the container cylinder is a PVT cylinder with a capacity of 1L-1.5L.

[0009] Optionally, the mixture acquisition device further comprises a displacement pump for displacing the mixture of the heavy oil and the solvent into the sampler.

[0010] Optionally, the mixture acquisition device further includes: a heating jacket, which is arranged on the outer wall of the container tube; and a heat bath control device, which is connected to the heating jacket and is used to maintain the temperature in the container tube at a target temperature.

[0011] Optionally, the heat bath control device comprises: a bathtub in which a heat-conducting medium is arranged, and is used to heat the heat-conducting medium in the bathtub at a target temperature; and a pump, which is used to form a circulation loop for the heat-conducting medium between the bathtub and the heating jacket.

[0012] Optionally, the measurement system further comprises a pressure regulating valve for controlling the pressure in the sampler at a target pressure.

[0013] On the other hand, the present invention also provides a solubility determination method, which comprises: obtaining the mass of a sampler in the mixture acquisition device, wherein the sampler contains a mixture of a solvent and heavy oil under preset conditions; degassing the sampler and obtaining the mass of the degassed sampler; and determining the solubility of the solvent in the heavy oil under the preset conditions based on the obtained mass of the sampler, the mass of the degassed sampler, and the mass of the sampler itself.

[0014] On the other hand, the present invention also provides a measurement system, which includes: a mixture acquisition device, used to acquire the mass of a sampler in the mixture acquisition device, wherein the sampler contains a mixture of a solvent and heavy oil under preset conditions, and the preset conditions include a target pressure; a mass acquisition device, used to acquire the mass of the sampler after degassing; and a determination device, used to determine the solubility of the solvent in the heavy oil under the preset conditions based on the acquired mass of the sampler, the mass of the sampler after degassing, and the mass of the sampler itself.

[0015] Through the above technical scheme, the mixture acquisition device provided by the present invention includes a container barrel, which is fixedly installed at a preset position and is used to accommodate a target dose of heavy oil; a solvent pump, which is used to inject a specific dose of solvent into the container barrel to form a mixture of solvent and heavy oil in the container barrel; a stirring device, which is arranged in the container barrel and is used to stir the solvent and heavy oil in the container barrel to accelerate the dissolution of the solvent; and a sampler, which is detachably arranged at one end of the container barrel and is used to sample the mixture. Therefore, the mixture acquisition device provided by the present invention is a stirring device arranged in the container barrel, so that the heavy oil and the solvent are efficiently mixed, and the reaction time of the mixture is shortened. At the same time, due to the arrangement of the stirring device, the container barrel does not need to be flipped, and the container barrel can be fixed at the position required for the experiment, and the mixing and stirring process in the fixed container barrel will not be affected by the pipeline, so different doses of solvent can be injected into the container barrel in a short time to obtain multiple sets of experimental data. Furthermore, the solvent in the solvent pump is directly injected into the container containing the heavy oil without the need to additionally provide a heavy oil cylinder (or heavy oil pump) device, thereby reducing the volume of the test device as a whole and obtaining a smaller test device.

[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0018] Figure 1 is a schematic structural diagram of a mixture obtaining device provided by a first embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of another mixture obtaining device provided by the first embodiment of the present invention;

[0020] Figure 3is a schematic structural diagram of a mixture obtaining device provided in a second embodiment of the present invention;

[0021] Figure 4 The present invention provides a flow chart of a solubility determination method. DETAILED DESCRIPTION

[0022] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0023] Figure 1 : is a schematic diagram of the structure of the mixture acquisition device provided by the first embodiment of the present invention. The mixture acquisition device comprises: a container barrel 1, fixedly installed at a preset position, used to contain a target dose of heavy oil; a solvent pump 2, used to inject a specific dose of solvent into the container barrel 1 to form a mixture of solvent and heavy oil in the container barrel 1; a stirring device 3, the stirring device 3 is arranged in the container barrel 1, used to stir the solvent and heavy oil in the container barrel to accelerate the dissolution of the solvent; and a sampler 4, the sampler is detachably arranged at one end of the container barrel, used to sample the mixture.

[0024] Specifically, the container barrel 1 in the mixture acquisition device can be fixed at a preset position, for example, it can be fixed at a required position anytime and anywhere according to the test site. During the test, a certain dose of heavy oil can be directly added to the container barrel 1 as needed to wait for the next test. The solvent pump 2 contains a certain dose of solvent, which is used to inject a specific dose of solvent into the container barrel 1 to form a mixture of solvent and heavy oil in the container barrel 1. Among them, the specific dose of solvent can be the injection amount of the solvent corresponding to the pressure in the container barrel 1 reaching the target pressure when the solvent pump 2 injects the solvent into the solvent barrel 1 (the embodiment of the present invention mainly studies the solubility of the gas solvent in the heavy oil, so the pressure in the container barrel 1 changes with the amount of solvent pump 1 injected into the container barrel 1).

[0025] In order to stir the mixture evenly and efficiently in a short time and obtain a mixed sample in a short time, the embodiment of the present invention sets a stirring device 3 in the container barrel 1 to stir the solvent and the heavy oil in the container barrel to accelerate the dissolution of the solvent. During the stirring process, as the solvent dissolves in the heavy oil, the pressure in the container barrel 1 reaches a stable state after the solvent is fully dissolved. At this time, the amount of solvent injected into the container barrel 1 can be obtained, and the stirred mixture can be sampled through the sampler 4.

[0026] The sampler 4 is detachably disposed at one end of the container barrel, and the stirred mixture can be sampled through the sampler 4. Remove the sampler 4 as the sample to be tested, and then replace it with a new sampler 4 to wait for the next set of samples. For example, after removing the sampler 4, continue to inject a specific dose of solvent into the container barrel 1, repeat the above steps to take new samples, and multiple sets of samples can be obtained in a short time.

[0027] The mixture acquisition device provided by the embodiment of the present invention is a stirring device arranged in the container barrel, so that the thick oil and the solvent are efficiently mixed, and the reaction time of the mixture is shortened. At the same time, due to the arrangement of the stirring device, the container barrel no longer needs to be turned over, and the container barrel can be fixed at the position required for the experiment, and the mixing and stirring process in the fixed container barrel will not be affected by the pipeline, so different doses of solvent can be injected into the container barrel in a short time to obtain multiple sets of experimental data. In addition, the solvent in the solvent pump is directly injected into the container containing the thick oil without the need to additionally set up a thick oil barrel (or thick oil pump) device, which reduces the volume of the test device as a whole and can obtain a smaller test device. Furthermore, since the container barrel is fixedly installed at a preset position and the dissolution speed of the solvent is accelerated by the stirring device, and the dissolution of the solvent does not need to be achieved by turning over the entire container barrel, it is not necessary to manually remove and install the pipeline repeatedly each time, thereby shortening the time to obtain the sample.

[0028] Furthermore, the stirring device 3 includes a rotating impeller 32, which is located in the container barrel 1, and the depth of the rotating impeller 32 in the container barrel 1 is a first preset proportion of the depth of the target dose of heavy oil; and a rotating rod 31, the rotating impeller 32 is installed at one end of the rotating rod 31, and the other end of the rotating rod 31 is fixed to the top of the container barrel 1.

[0029] Furthermore, the size of the rotary impeller is a second preset ratio of the diameter of the container barrel.

[0030] Specifically, the stirring device 3 specifically includes a rotating impeller 32 and a rotating rod 31. In order to increase the stirring speed and make the thick oil and the solvent dissolve faster, the embodiment of the present invention sets the depth of the rotating impeller 32 in the container barrel 1 to a first preset ratio of the depth of the target dose of thick oil. Exemplarily, when the depth of the target dose of thick oil is known, the depth of the rotating impeller 32 in the container barrel 1 is set to a first preset ratio of the depth of the target dose of thick oil. to The container tube 1 is a sealed container tube, preferably a PVT tube, and further, the PVT tube can be a Parr reactor to stir quickly and fully in a closed space. In addition, the rotating rod 31 can be installed on the top of the container tube 1.

[0031] Furthermore, the container cylinder is a PVT cylinder with a capacity of 1L-1.5L.

[0032] In order to shorten the test time, preferably, the capacity of the container barrel 1 can be selected as a PVT barrel with a capacity of 1L-1.5L, and a small container barrel is used to obtain a fully stirred mixture in a short time.

[0033] Furthermore, the mixture acquisition device also includes: a heating jacket 5, which is arranged on the outer wall of the container tube 1; and a heat bath control device 6, which is connected to the heating jacket 5 and is used to maintain the temperature inside the container tube 1 at a target temperature.

[0034] Furthermore, the heat bath control device comprises: a bathtub, in which a heat-conducting medium is arranged, for heating the heat-conducting medium in the bathtub at a target temperature; and a pump, for forming a circulation loop of the heat-conducting medium between the bathtub and the heating jacket.

[0035] Specifically, Figure 2 The figure shows a schematic diagram of the structure of another mixture acquisition device provided by the first embodiment of the present invention. In order to further determine the solubility of the solvent at different temperatures, the target temperature is first set, and the target temperature is quickly heated by the heating jacket 5. The heat bath control device 6 is connected to the heating jacket 5, and a heat-conducting medium is arranged in the bath 61 of the heat bath control device. When the temperature rises to the target temperature, in order to test the solubility of the solvent in the thick liquid at the target temperature, the present invention uses a heat bath control device 6 connected to the heating jacket 5, and the heat-conducting medium forms a circulation loop between the bath 61 and the heating jacket 5 under the action of a pump (not shown in the figure), and the heat-conducting medium in the bath 61 is maintained at the target temperature. When the mixture is stirred until the pressure in the container tube 1 is stable, the sampler 4 is used for sampling.

[0036] Furthermore, the measuring system also includes a pressure regulating valve for controlling the pressure in the sampler at a target pressure.

[0037] Specifically, in order to ensure the accuracy of the sample during sampling and control the pressure in the sampler to be equal to the target pressure in the container tube 1, the embodiment of the present invention also provides a pressure regulating valve 7 at one end of the sampler 4 to control the pressure in the sampler 4 at the target pressure.

[0038] Through the above technical scheme, the mixture acquisition device provided by the present invention includes a container barrel, which is fixedly installed at a preset position and is used to accommodate a target dose of heavy oil; a solvent pump, which is used to inject a specific dose of solvent into the container barrel to form a mixture of solvent and heavy oil in the container barrel; a stirring device, which is arranged in the container barrel and is used to stir the solvent and heavy oil in the container barrel to accelerate the dissolution of the solvent; and a sampler, which is detachably arranged at one end of the container barrel and is used to sample the mixture. Therefore, the mixture acquisition device provided by the present invention is a stirring device arranged in the container barrel, so that the heavy oil and the solvent are efficiently mixed, and the reaction time of the mixture is shortened. At the same time, due to the arrangement of the stirring device, the container barrel does not need to be flipped, and the container barrel can be fixed at the position required for the experiment, and the mixing and stirring process in the fixed container barrel will not be affected by the pipeline, so different doses of solvent can be injected into the container barrel in a short time to obtain multiple sets of experimental data. Furthermore, the solvent in the solvent pump is directly injected into the container containing the heavy oil without the need to additionally provide a heavy oil cylinder (or heavy oil pump) device, thereby reducing the volume of the test device as a whole and obtaining a smaller test device. Figure 3 1 is a schematic diagram of the structure of the mixture acquisition device provided by the second embodiment of the present invention. The second embodiment further adds a displacement pump 5 that is beneficial to high-throughput sampling on the basis of the first embodiment.

[0039] The mixture acquisition device includes: a container barrel 1, fixedly installed at a preset position, for containing a target dose of heavy oil; a solvent pump 2, for injecting a specific dose of solvent into the container barrel 1 to form a mixture of solvent and heavy oil in the container barrel 1; a stirring device 3, the stirring device 3 is arranged in the container barrel 1, for stirring the solvent and heavy oil in the container barrel to accelerate the dissolution of the solvent; a sampler 4, the sampler is detachably arranged at one end of the container barrel, for sampling the mixture. The mixture acquisition device also includes a displacement pump, for displacing the mixture of heavy oil and solvent into the sampler; and a displacement pump 8, for displacing the mixture of heavy oil and solvent into the sampler.

[0040] Specifically, the container barrel 1 in the mixture acquisition device can be fixed at a preset position, for example, it can be fixed at a required position anytime and anywhere according to the test site. During the test, a certain dose of heavy oil can be directly added to the container barrel 1 as needed to wait for the next test. The solvent pump 2 contains a certain dose of solvent pump, which is used to inject a specific dose of solvent into the container barrel 1 to form a mixture of solvent and heavy oil in the container barrel 1. Among them, the specific dose of solvent can be the injection amount of the solvent corresponding to the pressure in the container barrel 1 reaching the target pressure when the solvent pump 2 injects the solvent into the solvent barrel 1 (the solubility of the gas solvent in the heavy oil is mainly studied in the embodiment of the present invention, so the pressure in the container barrel 1 changes with the amount of the solvent pump 1 injected into the container barrel 1). The stirred mixture is driven into the sampler 4 by the displacement pump to give a first pressure. Among them, the first pressure is higher than the target pressure.

[0041] In order to stir the mixture evenly and efficiently in a short time and obtain a mixed sample in a short time, the embodiment of the present invention arranges a stirring device 3 in the container barrel 1 to stir the mixture in the container barrel. As the solvent dissolves in the heavy oil during the stirring process, the pressure in the container barrel 1 reaches a stable state after the solvent is fully dissolved. At this time, the amount of solvent injected into the container barrel 1 can be obtained, and the stirred mixture can be further sampled through the sampler 4. In order to save time, a new sampler 4 can be replaced and wait for the next set of samples to be obtained. For example, after replacing the sampler 4, continue to inject a specific dose of solvent into the container barrel 1, repeat the above steps to obtain new samples, and multiple sets of samples can be obtained in a short time in sequence.

[0042] The sampler 4 is detachably disposed at one end of the container barrel, and the stirred mixture can be sampled through the sampler 4. Remove the sampler 4 as the sample to be tested, and then replace it with a new sampler 4 to wait for the next set of samples. For example, after removing the sampler 4, continue to inject a specific dose of solvent into the container barrel 1, repeat the above steps to take new samples, and multiple sets of samples can be obtained in a short time.

[0043] The mixture acquisition device provided in the embodiment of the present invention is a stirring device arranged in the container barrel, so that the heavy oil and the solvent are efficiently mixed, and the reaction time of the mixture is shortened. At the same time, due to the stirring device, the container barrel does not need to be turned over, and the container barrel can be fixed at the position required for the experiment, and the mixing and stirring process in the fixed container barrel will not be affected by the pipeline, so different doses of solvent can be injected into the container barrel in a short time to obtain multiple sets of experimental data.

[0044] Furthermore, the stirring device 3 includes a rotating impeller 32, which is located in the container barrel 1, and the depth of the rotating impeller 32 in the container barrel 1 is a first preset proportion of the depth of the target dose of heavy oil; and a rotating rod 31, the rotating impeller 32 is installed at one end of the rotating rod 31, and the other end of the rotating rod 31 is fixed to the top of the container barrel 1.

[0045] Furthermore, the size of the rotary impeller is a second preset ratio of the diameter of the container barrel.

[0046] Specifically, the stirring device 3 specifically includes a rotating impeller 32 and a rotating rod 31. In order to increase the stirring speed and make the thick oil and the solvent dissolve faster, the embodiment of the present invention sets the depth of the rotating impeller 32 in the container barrel 1 to a first preset ratio of the depth of the target dose of thick oil. Exemplarily, when the depth of the target dose of thick oil is known, the depth of the rotating impeller 32 in the container barrel 1 is set to a first preset ratio of the depth of the target dose of thick oil. to The container tube 1 is a sealed container tube, preferably a PVT tube, and further, the PVT tube can be a Parr reactor to stir quickly and fully in a closed space. In addition, the rotating rod 31 can be installed on the top of the container tube 1.

[0047] Furthermore, the container cylinder is a PVT cylinder with a capacity of 1L-1.5L.

[0048] In order to shorten the test time, preferably, the capacity of the container cylinder 1 can be selected as a PVT cylinder with a capacity of 1L-1.5L, so as to obtain a fully stirred mixture in a short time.

[0049] Furthermore, the mixture acquisition device also includes: a heating jacket 5, which is arranged on the outer wall of the container tube 1; and a heat bath control device 6, which is connected to the heating jacket 5 and is used to maintain the temperature inside the container tube 1 at a target temperature.

[0050] Furthermore, the heat bath control device comprises: a bathtub, in which a heat-conducting medium is arranged, for heating the heat-conducting medium in the bathtub at a target temperature; and a pump, for forming a circulation loop of the heat-conducting medium between the bathtub and the heating jacket.

[0051] Specifically, Figure 3The figure shows a schematic diagram of the structure of the mixture acquisition device provided by the second embodiment of the present invention. In order to further determine the solubility of the solvent at different temperatures, the target temperature is first set, and the target temperature is quickly heated by the heating sleeve 5. The heat bath control device 6 is connected to the heating sleeve 5, and a heat-conducting medium is arranged in the bath 61 of the heat bath control device. When the temperature rises to the target temperature, in order to test the solubility of the solvent in the thick liquid at the target temperature, the present invention uses a heat bath control device 6 connected to the heating sleeve 5, and the heat-conducting medium forms a circulation loop between the bath 61 and the heating sleeve 5 under the action of a pump (not shown in the figure), and the heat-conducting medium in the bath 61 is maintained at the target temperature. When the mixture is stirred until the pressure in the container tube 1 is stable, the sampler 4 is used for sampling.

[0052] Furthermore, the measuring system also includes a pressure regulating valve for controlling the pressure in the sampler at a target pressure.

[0053] Specifically, in order to ensure the accuracy of the sample during sampling and control the pressure in the sampler to be equal to the target pressure in the container tube 1, the embodiment of the present invention also provides a pressure regulating valve 7 at one end of the sampler 4 to control the pressure in the sampler 4 at the target pressure.

[0054] Through the above technical scheme, the mixture acquisition device provided by the present invention includes a container barrel, which is fixedly installed at a preset position and is used to accommodate a target dose of heavy oil; a solvent pump, which is used to inject a specific dose of solvent into the container barrel to form a mixture of solvent and heavy oil in the container barrel; a stirring device, which is arranged in the container barrel and is used to stir the mixture in the container barrel; a sampler, which is used to sample the mixture; and a displacement pump, which is used to displace the mixture into the sampler. The mixture acquisition device provided by the present invention is a stirring device arranged in the container barrel, so that the heavy oil and the solvent are efficiently mixed, and the reaction time of the mixture is shortened. At the same time, due to the arrangement of the stirring device, the container barrel does not need to be flipped, and the container barrel can be fixed at the position required for the experiment, and the mixing and stirring process in the fixed container barrel will not be affected by the pipeline, so different doses of solvent can be injected into the container barrel in a short time to obtain multiple sets of experimental data.

[0055] On the other hand, the present invention also provides a method for determining solubility. Figure 4 A flow chart of a solubility determination method is provided for an embodiment of the present invention. The solubility determination method is applied to the mixture acquisition device, and the determination method includes the following steps S10-12.

[0056] S10, obtaining the mass of the sampler in the mixture obtaining device.

[0057] Wherein, the sampler is filled with a mixture of solvent and heavy oil under preset conditions.

[0058] Exemplarily, the preset conditions may include a target pressure and a target temperature. Take dehydrated asphalt (heavy oil, including but not limited to dehydrated asphalt) and hexane (solvent, including but not limited to hexane) with a density of 1013kg / m3 as an example for illustration. First, 300ml of dehydrated asphalt is added to the container barrel, and 1000ml of hexane is filled in the solvent pump. Assuming that the mass of the sampler containing the sample corresponding to a certain pressure of 500kPa is collected, the solvent is injected into the container barrel by the solvent pump until the pressure in the container barrel reaches a certain pressure of 500kPa, and the injection of solvent into the container barrel is stopped. The dehydrated asphalt and hexane are fully stirred by a stirring device to obtain a mixture thereof, and then the mixture in the container barrel is displaced and collected into the sampler by a displacement pump with a pressure difference of 200 to 300kPa higher than the certain pressure, so that the mass of the sampler with a certain pressure of 500kPa can be obtained. According to the above steps, the mass of the sampler containing the mixture at a pressure of 1000 kPa, 1500 kPa or other numerical pressures can also be obtained.

[0059] The above method can obtain the mass of the sampler containing the mixture corresponding to a certain pressure under multiple preset conditions in a short time, shortening the time for collecting multiple sets of test data and improving the efficiency of the test. Preferably, the certain pressure can be a target pressure.

[0060] S11, performing a degassing operation on the sampler, and obtaining the mass of the sampler after degassing.

[0061] Specifically, the reason for degassing the sampler is to remove the solvent dissolved in the heavy oil and obtain the mass of the sampler filled with pure heavy oil.

[0062] S12, determining the solubility of the solvent in the heavy oil under the preset conditions according to the acquired mass of the sampler, the mass of the sampler after degassing, and the mass of the sampler itself.

[0063] Specifically, before the experiment is run, the mass of each sampler is obtained, which can be calculated as m1; the mass of the sampler containing the mixture at a certain temperature and a certain pressure is obtained, which can be calculated as m2; then the mass of the sampler after degassing (removing the solvent in the mixture), that is, the mass of the sampler containing pure heavy oil, is obtained, which can be calculated as m3. Based on the above parameters, it can be determined that the mass of hexane is equal to m2-m3, and the mass of asphalt oil is equal to m3-m1, so the solubility (mass fraction) of hexane in asphalt oil is equal to Assuming that the molecular weight of hexane is M1 and the molecular weight of asphalt oil is M2, the solubility under the mole fraction can be further calculated as

[0064] Exemplarily, the certain pressure under the preset conditions is controlled at 500 kPa, and samples of the mixture at multiple different temperatures are collected. Assuming that the mass of the sampler containing the sample corresponding to the certain temperature of 120°C is collected, the solvent is injected into the container barrel by the solvent pump until the pressure in the container barrel reaches a certain pressure of 500 kPa, and the injection of solvent into the container barrel is stopped. The dehydrated asphalt and hexane are fully stirred by a stirring device to obtain a mixture thereof. At the same time, the temperature is quickly heated to the certain temperature of 120°C using, for example, a heating jacket in an embodiment of the present invention (the target temperature in the container barrel can be controlled by any technical means, such as placing the mixture acquisition device in an incubator and setting the temperature to a certain temperature), and then the heating jacket is stopped, and the heat bath control device is continued to be used to maintain the certain temperature of 120°C to heat the container barrel, and the sample is obtained after stable heating for 10-15 minutes (set according to actual needs).

[0065] Specifically, the displacement pump can be used to displace the mixture in the container tube to collect it into the sampler at a pressure difference of 200 to 300 kPa higher than the certain pressure, so as to obtain the mass of the sampler containing the mixture sample at a certain pressure of 500 kPa and a target temperature of 120°C. According to the above steps, the mass of the sampler containing the mixture sample at a certain pressure of 1000 kPa and a certain temperature of 120°C, 160°C, 200°C, and 250°C (set according to test needs) can also be obtained. The mass of the sampler containing the mixture sample at a certain pressure of 1500 kPa and a target temperature of 120°C, 160°C, 200°C, and 250°C (set according to test needs) can also be obtained. The specific acquisition steps are the same as above and will not be repeated here.

[0066] On the other hand, an embodiment of the present invention also provides a system for measuring the solubility of a solvent in heavy oil. The measuring system comprises: a mixture acquisition device for acquiring the mass of a sampler in the mixture acquisition device, wherein the sampler contains a mixture of a solvent and heavy oil under preset conditions; a mass acquisition device for acquiring the mass of the degassed sampler; and a determination device for determining the solubility of the solvent in the heavy oil under the preset conditions based on the acquired mass of the sampler, the mass of the degassed sampler, and the mass of the sampler itself.

[0067] The mixture acquisition device is used to obtain the mass of the sampler in the mixture acquisition device. The specific method is referred to the following content.

[0068] Wherein, the sampler is filled with a mixture of solvent and heavy oil under preset conditions.

[0069] For example, dehydrated asphalt (heavy oil) and hexane (solvent) with a density of 1013kg / m3 are used as examples for explanation. First, 300ml of dehydrated asphalt is added to the container barrel, and 1000ml of hexane is filled in the solvent pump. Assuming that the mass of the sampler containing the sample corresponding to a certain pressure of 500kPa is collected, the solvent is injected into the container barrel by the solvent pump until the pressure in the container barrel reaches a certain pressure of 500kPa, and then the injection of solvent into the container barrel is stopped. The certain pressure can also be controlled by any existing technical means. The dehydrated asphalt and hexane are fully stirred by a stirring device to obtain a mixture thereof, and then the mixture in the container barrel is displaced and collected into the sampler by a displacement pump with a pressure difference of 200 to 300kPa higher than the certain pressure, and the mass of the sampler under a certain pressure of 500kPa (i.e., the mass of the mixture of solvent and heavy oil) is obtained by the sampler, and the result of the above method is compared and tested. According to the above steps, the mass of the sampler (ie, the mass of the mixture of solvent and heavy oil) at a certain pressure of 1000 kPa, 1500 kPa or other numerical pressures can also be obtained.

[0070] The mixture acquisition device can acquire the mass of multiple groups of samplers containing mixtures corresponding to a certain pressure in a short time, shortening the time for collecting multiple groups of test data and improving the efficiency of the test.

[0071] The mass acquisition device is used to acquire the mass of the sampler after degassing.

[0072] Specifically, the reason for performing the degassing operation on the sampler is that the solvent that is not completely dissolved in the heavy oil can be removed to obtain a mixture in which the solvent is completely dissolved in the heavy oil, thereby further improving the accuracy of sample solubility detection.

[0073] The determining device is used to determine the solubility of the solvent in the heavy oil under the preset conditions according to the acquired mass of the sampler, the mass of the sampler after degassing and the mass of the sampler itself.

[0074] Specifically, before the experiment is run, the mass of each sampler is obtained, which can be calculated as m1; the mass of the sampler containing the mixture obtained by the sampler at the target pressure is obtained, which can be calculated as m2; and then the mass of the sampler after degassing is obtained, which can be calculated as m3. According to the above parameters, it can be determined that the mass of hexane is equal to m2-m3, and the mass of asphalt oil is equal to m3-m1, so that the solubility (mass fraction) of hexane in asphalt oil is equal to ((m2-m3)) / ((m3-m1)). Assuming that the molecular weight of hexane is M1 and the molecular weight of asphalt oil is M2, the solubility under molar fraction can be further calculated as ((m2-m3)×M2) / ((m3-m1)×M1).

[0075] Exemplarily, the pressure is controlled at, for example, 500 kPa, and a plurality of samples of the mixture at a certain temperature are collected. Assuming that the mass of the sampler containing the sample is collected at a certain temperature of 120°C, the solvent is injected into the container barrel by the solvent pump until the pressure in the container barrel reaches a certain pressure of 500 kPa, and then the injection of the solvent into the container barrel is stopped. The dehydrated asphalt and hexane are fully stirred by a stirring device to obtain a mixture thereof. At the same time, the temperature is rapidly heated to the certain temperature of 120°C using a heating jacket, and then the heating jacket is stopped, and the heat control device is continued to maintain the certain temperature of 120°C to heat the container barrel, and the sample is obtained after stable heating for 10-15 minutes (set according to actual needs).

[0076] Specifically, the displacement pump can be used to displace the mixture in the container tube to collect it into the sampler at a pressure difference of 200 to 300 kPa higher than a certain pressure, so as to obtain the mass of the sampler containing the mixture sample at a certain pressure of 500 kPa and a certain temperature of 120°C. According to the above steps, the mass of the sampler containing the mixture sample at a target pressure of 1000 kPa and a certain temperature of 120°C, 160°C, 200°C, and 250°C (set according to test needs) can also be obtained. The mass of the sampler containing the mixture sample at a certain pressure of 1500 kPa and a certain temperature of 120°C, 160°C, 200°C, and 250°C (set according to test needs) can also be obtained. The specific acquisition steps are the same as above and will not be repeated here.

[0077] The above-mentioned system for determining the solubility of solvent in heavy oil can obtain the mass of samplers containing mixtures corresponding to multiple groups of certain pressures and certain temperatures in a short time, shortening the time for collecting multiple groups of test data and improving the efficiency of the test. Among them, the certain pressure can be a target pressure, and the certain temperature can be a target temperature.

[0078] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take 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.) containing computer-usable program code.

[0079] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks 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 produce 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 device that provides the functions specified in a block or multiple blocks.

[0080] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0081] 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.

[0082] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A mixture obtaining device, characterized in that: The mixture obtaining device comprises: A container barrel, fixedly installed at a preset position, for containing a target dose of heavy oil; a solvent pump, used for injecting a specific dose of solvent into the container barrel to form a mixture of solvent and thick oil in the container barrel; a stirring device, the stirring device being disposed in the container barrel and being used for stirring the solvent and the thick oil in the container barrel to accelerate the dissolution of the solvent; and A sampler is detachably arranged at one end of the container barrel and is used for sampling the mixture.

2. The mixture obtaining device according to claim 1, characterized in that: The stirring device comprises: a rotating impeller located in the container barrel, wherein the depth of the rotating impeller in the container barrel is a first preset proportion of the depth of the target dose of heavy oil; and A rotating rod, the rotating impeller is installed at one end of the rotating rod, and the other end of the rotating rod is fixed to the top end of the container tube.

3. The mixture obtaining device according to claim 2, characterized in that: The size of the rotary impeller is a second preset ratio of the diameter of the container barrel.

4. The mixture obtaining device according to claim 1, characterized in that: The container cylinder is a PVT cylinder with a capacity of 1L-1.5L.

5. The mixture obtaining device according to claim 1, characterized in that: The mixture acquisition device further includes a displacement pump for displacing the mixture of the heavy oil and the solvent into the sampler.

6. The mixture obtaining device according to claim 1, characterized in that: The mixture obtaining device further comprises: A heating jacket, the heating jacket being disposed on an outer wall of the container tube; and A heat bath control device is connected to the heating jacket and is used to maintain the temperature in the container barrel at a target temperature.

7. The mixture obtaining device according to claim 6, characterized in that: The heat bath control device comprises: a bathtub, wherein a heat-conducting medium is disposed in the bathtub and is used to heat the heat-conducting medium in the bathtub at a target temperature; A pump is used to form a circulation loop for the heat-conducting medium between the bath and the heating jacket.

8. The mixture obtaining device according to claim 1, characterized in that: The measuring system further comprises a pressure regulating valve for controlling the pressure in the sampler to be at a target pressure.

9. A method for determining solubility, characterized in that: Applied to the mixture acquisition device according to any one of claims 1 to 8, the determination method comprises: obtaining the mass of a sampler in the mixture obtaining device, wherein the sampler is filled with a mixture of a solvent and a heavy oil under preset conditions; Performing a degassing operation on the sampler and obtaining the mass of the sampler after degassing; The solubility of the solvent in the heavy oil under the preset conditions is determined according to the acquired mass of the sampler, the mass of the sampler after degassing, and the mass of the sampler itself.

10. A system for measuring the solubility of a solvent in heavy oil, characterized in that: The measuring system comprises: a mixture acquisition device for acquiring the mass of a sampler in the mixture acquisition device, wherein the sampler contains a mixture of a solvent and a heavy oil under a preset condition, and the preset condition includes a target pressure; a mass acquisition device for acquiring the mass of the sampler after degassing; and a determining device for determining the solubility of the solvent in the heavy oil under the preset conditions according to the acquired mass of the sampler, the mass of the sampler after degassing and the mass of the sampler itself.

Images