CN209911267U - Crude oil oxidation heat release characteristic measuring system - Google Patents
Crude oil oxidation heat release characteristic measuring system Download PDFInfo
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- CN209911267U CN209911267U CN201920236729.7U CN201920236729U CN209911267U CN 209911267 U CN209911267 U CN 209911267U CN 201920236729 U CN201920236729 U CN 201920236729U CN 209911267 U CN209911267 U CN 209911267U
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Abstract
The utility model discloses a crude oil oxidation exothermicity characteristic measurement system, include: the system comprises a high-pressure injection and flow control module, a reactor module, a heat tracking compensation module and a reactant filling module, wherein the high-pressure injection and flow control module comprises a high-pressure gas tank, a high-pressure inlet pressure reducing valve and a high-pressure back pressure valve; the reactor module comprises a reaction vessel, an output port and an injection port, wherein the output port is arranged at an opening on the surface of the reaction vessel and is connected with a high-pressure backpressure valve through a pipeline, the output port is used for discharging gas produced by the reaction vessel to the high-pressure backpressure valve, the injection port is arranged in the reaction vessel and is connected with a high-pressure inlet reducing valve through a pipeline, a first temperature thermocouple is arranged at the injection port, and a second temperature thermocouple is arranged on the outer wall of the reaction vessel; the heat tracing compensation module is used for providing heat for the reaction container; the reactant charging module is used for charging reactants into the reaction vessel. The utility model discloses can effectively improve the accuracy of crude oil oxidation exothermic testing result.
Description
Technical Field
The utility model relates to a thin oil annotates air and viscous crude oil fireflood technical field, especially relates to a crude oil oxidation exothermal characteristic survey system.
Background
In recent years, reservoir air injection flooding has proven to be an effective and extremely potential technique for enhanced oil recovery. The key point of the effective implementation of the air injection technology is whether the oxygen can fully generate oxidation reaction with the crude oil in the stratum, so that the research on the oxidation reaction of the crude oil in the air has great significance for guiding the development of oil and gas fields. At present, a displacement device is mainly adopted in a system for measuring the oxidation heat release characteristic of crude oil to measure the heat release of the crude oil during the oxidation reaction, for example, a high-pressure air injection oxidation heat effect detection and tracking experiment device is mainly a long core displacement pipe provided with a compensation heating sheet and a temperature measuring thermocouple, and the adiabatic experiment condition is realized through thermal temperature compensation. For another example, in the high-temperature high-pressure adiabatic oxidation experiment system, the thermal tracking compensation module is used for realizing adiabatic experiment conditions, and crude oil, water and gas samples required by the reaction are injected into the experiment container according to the required proportion, so that the crude oil oxidation reaction under the set experiment conditions is realized. However, when the devices are used for measurement, part of crude oil samples can be displaced out of the experimental device by oxygen, so that the oxygen cannot sufficiently perform oxidation reaction with all the crude oil samples, and the specific measurement result of crude oil oxidation heat release is inaccurate.
SUMMERY OF THE UTILITY MODEL
The embodiment of this application provides a crude oil oxidation exothermic character survey system for measure the calorific capacity when crude oil takes place oxidation reaction, survey crude oil oxidation exothermic character, avoid the crude oil sample to be displaced out experimental apparatus by oxygen, guarantee that oxygen is sufficient and take place oxidation reaction with whole crude oil sample, thereby improve the accuracy of crude oil oxidation exothermic assay result, this system includes: a high pressure injection and flow control module, a reactor module, a heat trace compensation module and a reactant charging module, wherein,
the high-pressure injection and flow control module comprises a high-pressure gas tank, a high-pressure inlet pressure reducing valve and a high-pressure back pressure valve, high-pressure oxygen is discharged from the high-pressure gas tank, passes through the high-pressure inlet pressure reducing valve through a pipeline and is injected into the reactor module, and gas produced from the reactor module is discharged through the high-pressure back pressure valve through the pipeline;
the reactor module comprises a reaction vessel, an output port and an injection port, wherein the output port is arranged at an opening on the surface of the reaction vessel and is connected with a high-pressure backpressure valve through a pipeline, the output port is used for discharging gas generated by the reaction vessel to the high-pressure backpressure valve, the injection port is arranged in the reaction vessel and is connected with a high-pressure inlet reducing valve through a pipeline, a first temperature thermocouple is arranged at the injection port and is used for measuring the temperature in the reaction vessel, and a second temperature thermocouple is arranged on the outer wall of the reaction vessel and is used for measuring the temperature of the outer wall of the reaction vessel;
the heat tracking compensation module is used for providing heat for the reaction container;
the reactant filling module is used for filling reactants into the reaction container.
For the scheme that adopts the displacement device to survey crude oil oxidation exothermicity characteristic among the prior art, this application embodiment is through the position of output port and injection port in the design reactor module, avoids the crude oil sample to be displaced out of experimental apparatus by oxygen, guarantees that oxygen is abundant to take place oxidation reaction with whole crude oil sample to improve the accuracy of crude oil oxidation exothermicity testing result.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some examples of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a diagram showing a system for measuring exothermic heat of oxidation characteristics of crude oil according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to measure the heat release amount of crude oil during the oxidation reaction, determine the oxidation heat release characteristics of crude oil, avoid the crude oil sample to be displaced out of the experimental device by oxygen, ensure that oxygen sufficiently reacts with all crude oil samples by oxidation, and improve the accuracy of the crude oil oxidation heat release determination result, the embodiment of the application provides a crude oil oxidation heat release characteristic determination system, as shown in fig. 1, the system comprises: a high pressure injection and flow control module 101, a reactor module 102, a heat trace compensation module 103, and a reactant charging module 104, wherein,
the high-pressure injection and flow control module 101 comprises a high-pressure gas tank 1, a high-pressure inlet pressure reducing valve 2 and a high-pressure back pressure valve 14, high-pressure oxygen is discharged from the high-pressure gas tank 1, passes through the high-pressure inlet pressure reducing valve 2 through a pipeline, is injected into the reactor module 102, and gas generated from the reactor module 102 is discharged through the high-pressure back pressure valve 14 through the pipeline;
the reactor module 102 comprises a reaction vessel 5, an output port 10 and an injection port 4, wherein the output port 10 is arranged at an opening on the surface of the reaction vessel 5 and is connected with a high-pressure backpressure valve 14 through a pipeline, the output port 10 is used for discharging gas produced by the reaction vessel 5 to the high-pressure backpressure valve 14, the injection port 4 is arranged inside the reaction vessel 5 and is connected with a high-pressure inlet pressure reducing valve 2 through a pipeline, a first temperature thermocouple 9 is arranged at the injection port 4 and is used for measuring the temperature inside the reaction vessel, and a second temperature thermocouple 8 is arranged on the outer wall of the reaction vessel 5 and is used for measuring the temperature of the outer wall of the reaction vessel 5;
the heat tracing compensation module 103 is used for providing heat for the reaction vessel 5;
the reactant charging module 104 is used for charging reactants into the reaction vessel 5.
As can be known from fig. 1, in the embodiment of the present application, the output port 10 in the reactor module 102 is disposed at the opening on the surface of the reaction vessel 5, the injection port 4 is disposed inside the reaction vessel 5, and by designing the positions of the output port 10 and the injection port 4 in the reactor module 102, the gas generated by the reaction vessel 5 is discharged to the high-pressure backpressure valve 14, thereby avoiding the crude oil sample from being displaced out of the experimental apparatus by oxygen, ensuring that the oxygen is sufficiently oxidized with all crude oil samples, and improving the accuracy of the crude oil oxidation heat release measurement result. In the examples, the maximum test pressure was 35MPa, the maximum test temperature was 800 ℃, and the sealing standard was 35 MPa.
In an embodiment, the high pressure injection and flow control module 101 includes a high pressure gas tank 1, a high pressure inlet pressure reducing valve 2, and a high pressure back pressure valve 14, wherein high pressure oxygen is discharged from the high pressure gas tank 1, passes through the high pressure inlet pressure reducing valve 2 via a pipeline, and is injected into the reactor module 102, and gas generated from the reactor module 102 is discharged via the pipeline via the high pressure back pressure valve 14. The high-pressure gas tank 1 is a source of high-pressure oxygen in the experimental process, and the high-pressure back pressure valve 14 and the high-pressure inlet pressure reducing valve 2 realize reaction pressure regulation.
In an embodiment, the high pressure injection and flow control module 101 further comprises a high pressure needle valve 3 disposed on the line between the high pressure inlet pressure reducing valve 2 and the injection port 4, and on the line between the high pressure back pressure valve 14 and the production port 10, respectively. The high pressure needle valve 3 is responsible for the switching task of the reaction gas entering the reaction vessel. In this embodiment, two experimental modes of a closed experiment and an open experiment can be realized by switching the high-pressure needle valve 3 and adjusting the gas injection of the high-pressure inlet reducing valve 2. In the closed experiment, the high-pressure needle valve 3 is opened firstly, high-pressure oxygen is injected into the reaction vessel 5, then the high-pressure needle valve 3 is closed, and the experiment is continued. In the opening experiment, the high-pressure needle valve 3 is always in an open state, and the pressure is adjusted to the pressure required by the experiment through the high-pressure inlet reducing valve 2.
In an embodiment, the high pressure injection and flow control module 101 further includes a water cooling tank 12 disposed on a pipeline between the high pressure back pressure valve 14 and the production port 10, for cooling gas produced from the reaction vessel 5 and protecting the high pressure back pressure valve 14.
In an embodiment, the high pressure injection and flow control module 101 further includes a gas mass flow meter 13 disposed on the pipeline between the high pressure back pressure valve 14 and the output port 10 for controlling the flow of the experimental gas and maintaining the stability of the reaction process.
In the embodiment, the reactor module 102 includes a reaction vessel 5, an output port 10 and an injection port 4, the output port 10 is disposed at an opening on the surface of the reaction vessel 5 and connected to a high-pressure backpressure valve 14 through a pipeline, the output port 10 is used for discharging gas generated by the reaction vessel 5 to the high-pressure backpressure valve 14, the injection port 4 is disposed inside the reaction vessel 5 and connected to a high-pressure inlet pressure reducing valve 2 through a pipeline, a first temperature thermocouple 9 is disposed at the injection port 4 and used for measuring the temperature inside the reaction vessel, and a second temperature thermocouple 8 is disposed on the outer wall of the reaction vessel 5 and used for measuring the temperature of the outer wall of the reaction vessel 5. The system for measuring the oxidation heat release characteristic of crude oil at present mainly adopts a displacement device to measure the heat release of the crude oil during the oxidation reaction, for example, a high-pressure air injection oxidation heat effect detection and tracking experimental device, the main body of the device is a long core displacement tube provided with a compensation heating sheet and a temperature measuring thermocouple, and the adiabatic experimental condition is realized through thermal temperature compensation. For another example, in the high-temperature high-pressure adiabatic oxidation experiment system, the thermal tracking compensation module is used for realizing adiabatic experiment conditions, and crude oil, water and gas samples required by the reaction are injected into the experiment container according to the required proportion, so that the crude oil oxidation reaction under the set experiment conditions is realized. However, when the devices are used for measurement, part of crude oil samples can be displaced out of the experimental device by oxygen, so that the oxygen cannot sufficiently perform oxidation reaction with all the crude oil samples, and the specific measurement result of crude oil oxidation heat release is inaccurate. Therefore, the output port 10 in the reactor module 102 is arranged at the opening on the surface of the reaction vessel 5, the injection port 4 is arranged inside the reaction vessel 5, and by designing the positions of the output port 10 and the injection port 4 in the reactor module 102, the gas generated by the reaction vessel 5 is discharged to the high-pressure backpressure valve 14, so that the crude oil sample is prevented from being displaced out of the experimental device by oxygen, the oxygen is ensured to be fully oxidized with all crude oil samples, and the accuracy of the crude oil oxidation heat release measurement result is improved.
In the embodiment, the diameter of the output port 10 is 0.25 inch, the diameter of the output port 10 is larger than that of the injection port 4, and the injection port 4 arranged inside the reaction vessel 5 is threaded out of the output port 10 and connected to the high-pressure inlet pressure reducing valve 2. The cylindrical core displacement tube adopted in the system for measuring the crude oil oxidation heat release characteristic at present can not prevent the heat from being conducted along the radial direction of the metal tube wall, so that the model is locally heated to cause overall heating, and errors exist in heat measurement. Therefore, the diameter of the output port 10 is 0.25 inch in the embodiment of the application, and the diameter of the output port 10 is greater than the diameter of the injection port 4, the injection port 4 arranged inside the reaction vessel 5 penetrates out of the output port 10 through a pipeline and is connected with the high-pressure inlet pressure reducing valve 2, and as the pipeline connected with the injection port 4 is not in contact with the reaction vessel 5, the radial heat transfer of the reaction vessel 5 is greatly reduced, so that the influence on the experiment heat change is avoided. The injection port 4 is provided with a first temperature thermocouple 9, the outer wall of the reaction vessel 5 is provided with a second temperature thermocouple 8, the first temperature thermocouple and the second temperature thermocouple are respectively used for measuring the temperature inside the reaction vessel 5 and the temperature of the outer wall of the reaction vessel 5, and the two-point temperature measurement is carried out on the reaction vessel 5 to be matched with the heat tracking compensation module 103 to realize an adiabatic experimental environment.
In an embodiment, the thermal trace compensation module 103 is configured to provide heat to the reaction vessel 5. In the existing system for measuring the oxidation heat release characteristics of crude oil, the power of a heating compensation sheet arranged outside a metal sleeve is insufficient under a high-pressure condition to make up for external heat dissipation loss, so that an experimental heat insulation experimental environment cannot be tested under the high-pressure condition. In the embodiment of the application, heat is provided to the reaction container 5 through the heat tracking compensation module 103, so that the external heat dissipation loss of the reaction container 5 is compensated, and the heat insulation experiment environment is realized.
In an embodiment, the heat tracking compensation module 103 includes a high-pressure sealed cabin 6, and a plurality of compensation heating elements 7 are uniformly placed around a groove in the high-pressure sealed cabin 6, and are used for providing heat to the reaction vessel 5, compensating for external heat dissipation loss of the reaction vessel 5, and ensuring that the outer wall of the reaction vessel 5 is uniformly heated while realizing a heat insulation experiment environment. In this embodiment, the working mode of the high-pressure sealed cabin 6 may be set, and the working mode includes: the method comprises a heating mode and a compensation mode, wherein the heating mode heats the reaction vessel at a set experimental heating rate, and the compensation mode enables the temperature inside the reaction vessel and the temperature of the outer wall of the reaction vessel to be the same by adjusting the experimental heating rate.
In the embodiment, the reaction vessel 5 is a sphere and the recess in the hyperbaric chamber 6 is a sphere, so that the sample inside the reaction vessel 5 is uniformly heated.
In an embodiment, a reactant charging module 104 is used to charge reactants into the reaction vessel 5. The reactant charging module 104 includes: a funnel 15 and a vibrator 16, wherein the narrow-end of the funnel 15 is connected with the opening on the surface of the reaction vessel 5 and is arranged in the groove of the vibrator 16.
In an embodiment, the reactants comprise: crude oil samples and quartz sand. In the existing system for measuring the oxidation heat release characteristics of crude oil, a pure oil sample is injected by a method of simultaneously injecting water and gas, and the pure oil sample can generate surface oxidation, so that multi-stage heat release is caused. The mode that this application embodiment adopted crude oil sample and quartz sand to mix proportion according to certain proportion fills the reaction vessel through the funnel of reactant filling module in to utilize the oscillator with crude oil sample and quartz sand intensive mixing, make the reactant at the inside evenly distributed of reaction vessel, reactant and the even contact of the high pressure oxygen who injects, solve the multistage heat release problem of crude oil sample, solve the reaction vessel entry simultaneously and narrow and the experimental sample fills in the difficult problem.
In an embodiment, the crude oil oxidation exotherm characterization system further comprises: an experiment control module 105 connected to the reactor module 102 and the thermal tracking compensation module 103, for setting experiment parameters, which include: and (4) testing the temperature rise rate and the temperature. In the experimental process, before the reactants are subjected to oxidation reaction, the thermal compensation heating element 7 in the high-pressure sealed cabin 6 performs temperature rise treatment on the reaction container 5 according to a set experimental temperature rise rate, after the reactants are subjected to oxidation reaction, the high-pressure sealed cabin 6 is adjusted to a compensation mode, and the temperature of a thermocouple inside the reaction container and the temperature of a thermocouple on the wall surface of the reaction container are kept consistent by adjusting the experimental temperature rise rate, wherein whether the reactants are subjected to oxidation reaction is determined according to the following method: firstly, closing the heating mode of the high-pressure sealed cabin 6, measuring the temperature inside the reaction container 5 to obtain the actual heating rate inside the reaction container 5, then comparing the actual heating rate with the temperature detection line, if the actual heating rate is greater than the temperature detection line, the reactant is subjected to oxidation reaction, and if the actual heating rate is not greater than the temperature detection line, the reactant is not subjected to oxidation reaction.
In the embodiment, the value range of the temperature detection line is 2-15 ℃/min.
In an embodiment, the experimental parameters further include: high-pressure capsule pressure. In the experimental process, nitrogen is injected into the high-pressure sealed cabin 6, and the pressure of the high-pressure sealed cabin is 0.1-0.2 MPa greater than that of the reaction container 5, so that the reaction container 5 is protected.
To sum up, the application provides a crude oil oxidation exothermic character survey system, a calorific capacity for measuring crude oil when taking place oxidation reaction, survey crude oil oxidation exothermic character, output port 10 in the reactor module 102 sets up the opening part on reaction vessel 5 surface, injection port 4 sets up inside reaction vessel 5, through output port 10 and injection port 4's position in the design reactor module 102, the realization is discharged the gas of 5 outputs of reaction vessel to high-pressure back pressure valve 14, avoid crude oil sample to be displaced out experimental apparatus by oxygen, guarantee that oxygen is sufficient and whole crude oil sample takes place oxidation reaction, thereby improve the accuracy of crude oil oxidation exothermic testing result.
In the embodiment, the diameter of the output port 10 is 0.25 inch, the diameter of the output port 10 is larger than that of the injection port 4, the injection port 4 arranged inside the reaction vessel 5 penetrates out of the output port 10 through a pipeline and is connected with the high-pressure inlet pressure reducing valve 2, and the pipeline connected with the injection port 4 is not in contact with the reaction vessel 5, so that the radial heat transfer of the reaction vessel 5 is greatly reduced, and the influence on the experimental heat change is avoided. The injection port 4 is provided with a first temperature thermocouple 9, the outer wall of the reaction vessel 5 is provided with a second temperature thermocouple 8, the first temperature thermocouple and the second temperature thermocouple are respectively used for measuring the temperature inside the reaction vessel 5 and the temperature of the outer wall of the reaction vessel 5, and the two-point temperature measurement is carried out on the reaction vessel 5 to be matched with the heat tracking compensation module 103 to realize an adiabatic experimental environment. In addition, heat is provided for the reaction container 5 through the heat tracking compensation module 103, external heat dissipation loss of the reaction container 5 is compensated, and an adiabatic experimental environment is realized.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. A crude oil oxidation exotherm property measurement system, comprising: a high pressure injection and flow control module, a reactor module, a heat trace compensation module and a reactant charging module, wherein,
the high-pressure injection and flow control module comprises a high-pressure gas tank, a high-pressure inlet pressure reducing valve and a high-pressure back pressure valve, high-pressure oxygen is discharged from the high-pressure gas tank, passes through the high-pressure inlet pressure reducing valve through a pipeline and is injected into the reactor module, and gas produced from the reactor module is discharged through the high-pressure back pressure valve through the pipeline;
the reactor module comprises a reaction vessel, an output port and an injection port, wherein the output port is arranged at an opening on the surface of the reaction vessel and is connected with a high-pressure backpressure valve through a pipeline, the output port is used for discharging gas generated by the reaction vessel to the high-pressure backpressure valve, the injection port is arranged in the reaction vessel and is connected with a high-pressure inlet reducing valve through a pipeline, a first temperature thermocouple is arranged at the injection port and is used for measuring the temperature in the reaction vessel, and a second temperature thermocouple is arranged on the outer wall of the reaction vessel and is used for measuring the temperature of the outer wall of the reaction vessel;
the heat tracking compensation module is used for providing heat for the reaction container;
the reactant filling module is used for filling reactants into the reaction container.
2. The system of claim 1, wherein the high pressure injection and flow control module further comprises high pressure needle valves disposed on the line between the high pressure inlet pressure reducing valve and the injection port and the line between the high pressure back pressure valve and the production port, respectively.
3. The system of claim 1, wherein the high pressure injection and flow control module further comprises a water cooled tank disposed on a line between the high pressure backpressure valve and the production port.
4. The system of claim 1, wherein the high pressure injection and flow control module further comprises a gas mass flow meter disposed on a line between the high pressure backpressure valve and the production port.
5. The system of claim 1, wherein the production port has a diameter of 0.25 inches and the production port has a diameter greater than the injection port, and the injection port is disposed within the reaction vessel and is piped out of the production port and connected to the high pressure inlet relief valve.
6. The system of claim 1, wherein the heat trace compensation module comprises a plenum, and wherein a plurality of compensating heating elements are disposed uniformly about the periphery of the cavity within the plenum.
7. The system of claim 6, wherein the reaction vessel is a sphere and the recess in the capsule is spherical such that the sample inside the reaction vessel is uniformly heated.
8. The system of claim 1, wherein the reactant charging module comprises: the narrow-mouth end of the funnel is connected with the opening on the surface of the reaction vessel and is placed in the groove of the oscillator.
9. The system of claim 1, wherein the reactants comprise: crude oil samples and quartz sand.
10. The system of claim 1, further comprising:
the experiment control module is connected with the reactor module and the heat tracking compensation module and used for setting experiment parameters, and the experiment parameters comprise: and (4) testing the temperature rise rate and the temperature.
11. The system of claim 10, wherein the temperature detection line has a value in a range of 2-15 ℃/min.
12. The system of claim 10, wherein the experimental parameters further comprise: high-pressure capsule pressure.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354833A (en) * | 2021-11-25 | 2022-04-15 | 中国石油天然气股份有限公司 | Device and method for measuring oxidation kinetic parameters of reservoir fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354833A (en) * | 2021-11-25 | 2022-04-15 | 中国石油天然气股份有限公司 | Device and method for measuring oxidation kinetic parameters of reservoir fluid |
| CN114354833B (en) * | 2021-11-25 | 2024-04-12 | 中国石油天然气股份有限公司 | Reservoir fluid oxidation kinetic parameter determination device and method |
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