CN216771590U - Gas washing fractionation analysis device under high-temperature high-pressure closed system - Google Patents
Gas washing fractionation analysis device under high-temperature high-pressure closed system Download PDFInfo
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- CN216771590U CN216771590U CN202123013566.2U CN202123013566U CN216771590U CN 216771590 U CN216771590 U CN 216771590U CN 202123013566 U CN202123013566 U CN 202123013566U CN 216771590 U CN216771590 U CN 216771590U
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Abstract
The utility model relates to the technical field of oil gas exploration, in particular to a gas washing and fractionation analysis device under a high-temperature and high-pressure closed system. The device comprises a gas washing reaction device, a natural gas online collecting device, an isotope mass spectrometer, a crude oil micro rapid sampling device, a crude oil collecting device, a carbon dioxide purifying device, a valve, a heating jacket and a liquid nitrogen cold trap. The device provided by the utility model realizes real-time detection of crude oil and gas carbon isotopes in the gas-wash fractionation process under the high-temperature and high-pressure state, and has the advantages of high analysis speed and high accuracy.
Description
Technical Field
The utility model relates to the technical field of oil gas exploration, in particular to a gas washing and fractionation analysis device under a high-temperature and high-pressure closed system.
Background
Oil and gas exploration in partial areas of China reaches a high exploration degree stage, and deep oil and gas exploration is gradually paid attention. In the exploration of deep oil gas, the degree of general evolution of hydrocarbon source rocks is high, the natural gas generation stage is reached, and the process that the generated natural gas passes through an oil deposit, dissolves and carries away part of crude oil components in the oil deposit in the migration process is called gas washing. The gas washing changes the composition of the crude oil and the natural gas and also changes the characteristics of the crude oil and the natural gas.
The characteristics of oil gas are identified, the source of the oil gas is determined, and the method has important guiding significance for deep oil gas exploration. The carbon isotope technology of natural gas and crude oil is an important means for identifying deep oil gas sources, however, the carbon isotope fractionation of crude oil and natural gas can be formed in the gas washing process, and the carbon isotope numerical values of crude oil and natural gas of a primary oil reservoir are changed. Therefore, the research on the change process of the carbon isotopes of the crude oil and the natural gas in the whole gas washing process is an important means for comparing the oil gas source in the gas washing process.
Su Patriot et al have worked on the effects of phase control and gas wash fractionation on the composition of oil and gas components and carbon isotopes. The method comprises the steps of filling excessive gas into a crude oil system, collecting the filled gas and crude oil, and detecting components and carbon isotopes (Subai, Zhang Shu, Longbin, and the like, phase control and gas wash fractionation influences oil and gas components and carbon isotope composition [ J ]. geochemistry, 2000,29(6): 7.). In the above process, the collected samples are crude oil under normal pressure in the initial state and the final state of the reaction, and the crude oil is in an overpressure state in the underground oil reservoir, and the method lacks an effective method for the isotope test of the crude oil under the overpressure state. Meanwhile, the gas collection process is a process with constantly changing pressure, and in the pressure change process, the gas isotope generates a fractionation effect.
There is a need for an apparatus that can be used for gas wash fractionation under high temperature and high pressure closed systems.
Disclosure of Invention
The utility model mainly aims to provide a gas-washing fractionation analysis device under a high-temperature high-pressure closed system, which realizes real-time detection of crude oil and gas carbon isotopes in the gas-washing fractionation process under a high-temperature high-pressure state, and has the advantages of high analysis speed and high accuracy.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a gas-washing fractionation analysis device under a high-temperature and high-pressure closed system, which comprises a gas-washing reaction device, a natural gas online collection device, an isotope mass spectrometer, a crude oil trace rapid sampling device, a crude oil collection device, a carbon dioxide purification device, a valve, a heating jacket and a liquid nitrogen cold trap;
the gas washing reaction device is respectively connected with the natural gas on-line collection device and the crude oil trace rapid sampling device, and is connected with a natural gas source through a valve; the crude oil micro rapid sampling device is sequentially connected with a crude oil collecting device, a carbon dioxide purifying device and a first isotope mass spectrometer; the natural gas online collecting device is connected with a carrier gas source through a valve, and the second isotope mass spectrometer is connected with the natural gas online collecting device; the crude oil collecting device is connected with an oxygen source through a valve, the crude oil collecting device is placed in the first liquid nitrogen cold trap, and the heating sleeve surrounds the first liquid nitrogen cold trap; the crude oil micro rapid sampling device is arranged in the second liquid nitrogen cold trap.
The natural gas on-line collecting device is arranged, so that the real-time tracking of the carbon isotope of the natural gas can be realized. The adoption of the crude oil trace rapid sampling device can prevent the fractionation of carbon isotopes in the transmission process of crude oil.
The crude oil micro rapid sampling device and the crude oil collecting device are respectively arranged in the liquid nitrogen cold trap, so that the transfer of crude oil samples under the low-temperature condition is realized, the escape of dissolved hydrocarbon gas is prevented, and the accurate analysis of data is guaranteed. The natural gas on-line collecting device is connected with the carrier gas source, so that the complete collection of the natural gas in the sample analysis is ensured, and the interference of the carbon isotope fractionation effect of the natural gas on data is eliminated.
Further, the gas washing reaction device is also respectively connected with a pressure gauge and a temperature control system. The selection of samples under different temperature and pressure conditions in the gas washing reaction device can be realized.
Furthermore, a valve is arranged on a pipeline between the gas washing reaction device and the crude oil collecting device.
Further, a valve is arranged on a pipeline connecting the natural gas online collecting device and the second isotope mass spectrometer.
Furthermore, valves are respectively arranged on a pipeline connecting the crude oil collecting device and the carbon dioxide purifying device and a pipeline connecting the carbon dioxide purifying device and the first isotope mass spectrometer.
Compared with the prior art, the utility model has the following advantages:
the device provided by the utility model realizes real-time detection of crude oil and gas carbon isotopes in the gas washing fractionation process under the high-temperature and high-pressure state, and has the advantages of high analysis speed and high accuracy of obtained results. The device has important significance for comparing natural gas with crude oil sources, and can effectively guide exploration practice work.
Drawings
FIG. 1 is a schematic structural diagram of a gas-wash fractionation analysis apparatus under a high-temperature and high-pressure closed system according to embodiment 1 of the present invention.
The system comprises a gas washing reaction device 1, a temperature control system 2, a pressure gauge 3, a crude oil micro rapid sampling device 4, a crude oil collecting device 5, a carbon dioxide purifying device 6, a first isotope mass spectrometer 7, a natural gas online collecting device 8, a second isotope mass spectrometer 9, a carrier gas source 10, an oxygen source 11, a natural gas source 12, a valve I13, a valve II 14, a valve III 15, a valve IV 16, a valve IV 17, a valve V18, a valve VI, a valve VII, a first liquid nitrogen cold trap 21, a second liquid nitrogen cold trap 22 and a heating jacket.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
As shown in fig. 1, the gas-wash fractionation analysis device under the high-temperature high-pressure closed system comprises a gas-wash reaction device 1, a natural gas on-line collection device 8, an isotope mass spectrometer, a crude oil micro rapid sampling device 4, a crude oil collection device 5, a carbon dioxide purification device 6, a valve, a heating jacket 22 and a liquid nitrogen cold trap;
the gas washing reaction device 1 is respectively connected with the natural gas online collecting device 8 and the crude oil trace rapid sampling device 4, the gas washing reaction device 1 is connected with a natural gas source 12 through a valve I13, a valve II 14 is arranged on a pipeline for connecting the gas washing reaction device 1 and the natural gas online collecting device 8, and the gas washing reaction device is also respectively connected with a pressure gauge 3 and a temperature control system 2; the crude oil micro rapid sampling device 4 is sequentially connected with a crude oil collecting device 5, a carbon dioxide purifying device 6 and a first isotope mass spectrometer 7; a fifth valve 17 is arranged on a pipeline connecting the crude oil collecting device 5 and the carbon dioxide purifying device 6, and a sixth valve 18 is arranged on a pipeline connecting the carbon dioxide purifying device 6 and the first isotope mass spectrometer 7; the crude oil collecting device 5 is connected with the oxygen source 11 through a seventh valve 19, the crude oil collecting device 5 is placed in a first liquid nitrogen cold trap 20, and a heating jacket 22 surrounds the first liquid nitrogen cold trap 20; the crude oil micro rapid sampling device 4 is placed in the second liquid nitrogen cold trap 21.
The natural gas online collecting device 8 is connected with a carrier gas source 10 through a fourth valve 16; the second isotope mass spectrometer 9 is connected with the natural gas on-line collecting device 8, and a third valve 15 is arranged on the connecting pipeline.
The use method of the gas-washing fractionation analysis device under the high-temperature high-pressure closed system comprises the following steps:
1. natural gas carbon isotope analysis method
(1) Adding crude oil into the gas washing reaction device 1;
(2) heating the gas washing reaction device 1 to a specified temperature according to experimental requirements;
(3) closing the first valve 13, enabling the natural gas to enter the gas washing reaction device 1, and observing the reading of a pressure gauge 3 of the gas washing reaction device 1; when the pressure of the system begins to increase, the oil in the system is indicated to be in a saturated state;
(4) continuously introducing natural gas, when the system pressure is increased to the specified pressure of the experiment, disconnecting the first valve 13, observing the system pressure, and when the system pressure is constant and the specified pressure reaches 20min, indicating that the gas washing device 1 has reached a steady state; if the system pressure is reduced, opening a first valve 13 to supplement natural gas to a specified pressure;
(5) opening the third valve 15 and the fourth valve 16, and closing the second valve 14 to diffuse the natural gas in the gas washing reaction device 1 to the natural gas on-line collecting device 8;
(6) opening the second valve 14, closing the fourth valve 16, and injecting carrier gas into the natural gas online collection device 8, wherein the carrier gas is helium;
(7) and the valve III 15 is closed, and the natural gas and the carrier gas enter the second isotope mass spectrometer 9, so that the on-line analysis of the carbon isotopes of the natural gas can be realized.
2. The crude oil carbon isotope analysis method comprises the following steps:
(1) adding crude oil into the gas washing reaction device 1;
(2) heating the gas washing reaction device 1 to a specified temperature according to experimental requirements;
(3) closing the first valve 13, enabling the natural gas to enter the gas washing reaction device 1, and observing the reading of a pressure gauge 3 of the gas washing reaction device 1; when the pressure of the system begins to increase, the oil in the system is indicated to be in a saturated state;
(4) continuously introducing natural gas, when the system pressure is increased to the specified pressure of the experiment, disconnecting the first valve 13, observing the system pressure, and when the system pressure is constant and the specified pressure reaches 20min, indicating that the gas washing device 1 has reached a steady state; if the system pressure is reduced, opening a first valve 13 to supplement natural gas to a specified pressure;
(5) opening a liquid nitrogen cold trap 20 and a liquid nitrogen cold trap 21 to ensure that the temperatures of the crude oil micro rapid sampling device 4 and the crude oil collecting device 5 cannot cause the loss of dissolved natural gas;
(6) opening the crude oil micro rapid sampling device 4, taking micro crude oil, transferring the micro crude oil into the crude oil collecting device 5, and ensuring that natural gas dissolved in the micro crude oil is not lost due to extremely low internal temperature;
(7) opening the heating jacket 22, heating the crude oil collecting device 5 to 900 ℃, closing the valve seven 19, and injecting oxygen 15 into the crude oil collecting device 5; completely burning organic matters in the crude oil;
(8) opening the seventh valve 19 and closing the fifth valve 17 to make the gas such as carbon dioxide generated by the reaction enter the carbon dioxide purification device 6;
(9) and closing the sixth valve 18, and detecting the purified carbon dioxide gas by using the first isotope mass spectrometer 7 to obtain the carbon isotope numerical value in the carbon dioxide gas in the crude oil, namely the carbon isotope numerical value of the crude oil.
All parts and parts which are not discussed in the utility model and the connection mode of all parts and parts in the application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (5)
1. A gas washing fractionation analysis device under a high-temperature high-pressure closed system is characterized by comprising a gas washing reaction device, a natural gas online collection device, an isotope mass spectrometer, a crude oil trace rapid sampling device, a crude oil collection device, a carbon dioxide purification device, a valve, a heating jacket and a liquid nitrogen cold trap;
the gas washing reaction device is respectively connected with the natural gas on-line collection device and the crude oil trace rapid sampling device, and is connected with a natural gas source through a valve; the crude oil micro rapid sampling device is sequentially connected with a crude oil collecting device, a carbon dioxide purifying device and a first isotope mass spectrometer; the natural gas online collecting device is connected with a carrier gas source through a valve, and the second isotope mass spectrometer is connected with the natural gas online collecting device; the crude oil collecting device is connected with an oxygen source through a valve, the crude oil collecting device is placed in the first liquid nitrogen cold trap, and the heating sleeve surrounds the first liquid nitrogen cold trap; the crude oil micro rapid sampling device is arranged in the second liquid nitrogen cold trap.
2. The gas-washing fractionation analysis device under the high-temperature and high-pressure closed system according to claim 1, wherein the gas-washing reaction device is further connected with a pressure gauge and a temperature control system respectively.
3. The apparatus for gas-washing fractional distillation analysis under a high-temperature and high-pressure closed system according to claim 1, wherein a valve is disposed on the pipeline between the gas-washing reaction apparatus and the crude oil collection apparatus.
4. The gas-wash fractional analysis device under the high-temperature and high-pressure closed system as claimed in claim 1, wherein a valve is arranged on a pipeline connecting the natural gas on-line collection device and the second isotope mass spectrometer.
5. The apparatus according to claim 1, wherein valves are disposed on a pipeline connecting the crude oil collecting apparatus and the carbon dioxide purifying apparatus and a pipeline connecting the carbon dioxide purifying apparatus and the first isotope mass spectrometer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123013566.2U CN216771590U (en) | 2021-12-02 | 2021-12-02 | Gas washing fractionation analysis device under high-temperature high-pressure closed system |
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| CN202123013566.2U CN216771590U (en) | 2021-12-02 | 2021-12-02 | Gas washing fractionation analysis device under high-temperature high-pressure closed system |
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| CN216771590U true CN216771590U (en) | 2022-06-17 |
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| CN202123013566.2U Active CN216771590U (en) | 2021-12-02 | 2021-12-02 | Gas washing fractionation analysis device under high-temperature high-pressure closed system |
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- 2021-12-02 CN CN202123013566.2U patent/CN216771590U/en active Active
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