CN102636503A - CT (Electronic Computed X-ray Tomography technique) reformer for natural gas hydrate nature core and using method thereof - Google Patents
CT (Electronic Computed X-ray Tomography technique) reformer for natural gas hydrate nature core and using method thereof Download PDFInfo
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- CN102636503A CN102636503A CN2011103798518A CN201110379851A CN102636503A CN 102636503 A CN102636503 A CN 102636503A CN 2011103798518 A CN2011103798518 A CN 2011103798518A CN 201110379851 A CN201110379851 A CN 201110379851A CN 102636503 A CN102636503 A CN 102636503A
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Abstract
The invention discloses a CT (Electronic Computed X-ray Tomography technique) reformer for natural gas hydrate nature core and a using method thereof, belonging to the technical field of petroleum scientific research instruments. The natural gas hydrate nature core is arrangedd inside the CT reformer and is put on a CT carrying table; and design pressure is 0-20 MPa and design temperature is -20 DEG C to 30 DEC C. The pressure and the temperature of the entire system can be controlled by using a measurement and control system; the CT scanning is performed to obtain a high-quality image; and the image to be tested is analyzed to obtain a series of parameters of the natural core. An inner tube of the CT reformer is made of a rubber material, so as to ensure that the temperature and the pressure in a circulating cavity can be transmitted to the inner tube. Since an end cover and a jacket are made of titanium alloy material, not only can the weight be lightened to meet CT requirements, but also the temperature and the pressure in the device can be ensured and no influence is caused on CT rays. The CT reformer provided by the invention is compact in design and structure, can be repeatedly used, and is convenient to operate, simple and practical.
Description
Technical field
The present invention relates to the natural core CT of a kind of gas hydrate reformer, belong to oil scientific research Instrument technology field.
Background technology
CT (electronic computer X-ray tomography technique) technology is a kind of robot calculator X-ray scanning technology; The research that can be used for analyzing the hydrate inner structure, reaches aspects such as heat transfer flow parameter; Can generate gas hydrate, decomposable process detects, and can carry out synchronously, three-dimensional visualization shows.Tradition gas hydrate proving installation is mainly used in laboratory simulation generation gas hydrate and studies; Can not carry out the heat-insulation pressure keeping test to the natural core of hydrate; Natural core places traditional gas hydrate proving installation discharge degree will inevitably occur; Conventional apparatus can not realize pressure-loaded and reformation to natural core simultaneously; Destroy rock gas rock core inner structure, so analysis result can not guarantee with the actual truth of occurring in nature gas hydrate reservoir in full accord.And CT equipment all has certain limitation to the dimension and weight of clamping device, and traditional gas hydrate proving installation can't satisfy the requirement of CT instrument, does not also appear in the newspapers about the natural core reformer of the gas hydrate that are applicable to the CT measuring technology at present.
Summary of the invention
In order to solve the problem that exists in the above-mentioned CT imaging research, the present invention provides the natural core CT of a kind of gas hydrate reformer, and its purpose is to be applicable to the test of natural core sample, can be more near actual exploitation situation, and satisfy the requirement of CT equipment.
The technical scheme that the present invention adopts is:
The natural core CT of gas hydrate reformer comprises end cap, interior pipe, outer tube, O RunddichtringO, dull and stereotyped heat power supply device, and two end caps and interior pipe constitute hollow structure, the natural core of packing in the interior pipe; Simultaneously, constitute loop temperature-control pressure control cavity between two end caps and outer tube, the interior pipe, the temperature that is used to guarantee natural core sample gets into from the import of bottom end cover torus with the circulation cryogenic high pressure nitrogen of pressure, through upper end cover torus outlet outflow; The inwall of outer tube is provided with the temperature pressure sensing device interface, is used to detect the temperature and the pressure of constant-temperature temperature-control pressure control cavity inner fluid; Said end cap, outer tube adopt titanium alloy material, and interior pipe adopts elastomeric material; Outer tube and end cap junction adopt the O RunddichtringO that torus is sealed; The hollow structure bottom is provided with dull and stereotyped heat power supply device, is used to detect the heat transfer characteristic of natural core.
Above-mentioned CT reformer is placed on the CT objective table, and temperature and the pressure of circulation cryogenic high pressure nitrogen to guarantee natural core utilizes the CT device that natural core sample is carried out check and analysis again in the torus.
Except that adopting natural core, this device also can be used for the check and analysis of the artificial core of gas hydrate.
The invention has the beneficial effects as follows: adopt CT equipment; Be placed on the CT reformer on the CT objective table; Design pressure position 0～20MPa, design temperature is-20～30 ℃, can carry out the analysis of physical parameter, heat transfer characteristic, decomposition and regeneration procedure parameter to the natural core of gas hydrate; Interior pipe adopts elastomeric material, and torus feeds cryogenic high pressure nitrogen, has guaranteed the temperature and the pressure of natural core; End cap and overcoat adopt titanium alloy material, and weight reduction has guaranteed temperature and pressure in the device to satisfy the CT requirement, and the CT ray is had no effect, and project organization is compact, can reuse, and experimentation is convenient and simple for operation to be suitable for.
Description of drawings
Fig. 1 is the natural core CT of an a kind of gas hydrate reformer synoptic diagram.
Fig. 2 is the A-A sectional structure chart among Fig. 1.
Fig. 3 is the B-B sectional structure chart among Fig. 2.
Among the figure: 1 air intake opening; 2 end caps; The outlet of 3 torus; Pipe in 4; 5 outer tubes; The 6O RunddichtringO;
7 dull and stereotyped heat power supply devices; 8 dull and stereotyped thermal source wiring channels; 9 exhausr ports; 10 temperature pressure sensing device interfaces; 11 torus inlet.
Embodiment
The natural core CT of a kind of gas hydrate reformer has been shown among Fig. 1,2,3.Pipe and two end caps were formed hollow structure, the natural core of wherein packing in this CT reformer adopted one; Constitute loop temperature-control pressure control cavity between two end caps and an overcoat and the interior pipe; Adopt one to provide the constant temperature fluid bath of circulating fluid to connect the circulating fluid import to the temperature-control pressure-control fluid cavity to export with circulating fluid, outer casing inner wall is provided with temperature and the pressure that the temperature pressure sensing device is used to detect constant-temperature temperature-control pressure control cavity inner fluid; The hollow structure inner bottom part is provided with dull and stereotyped heat power supply device, is used to detect the heat transfer characteristic of natural core.
Utilize the step of the natural core CT of above-mentioned gas hydrate reformer following:
The first step is carried out the pressure release cooling with the natural core of gathering with low temperature liquid nitrogen and is handled, and guarantees that it does not decompose.
Second step is with the natural core CT reformer of packing into.Open CT reformer upper end cover, in the pipe, guarantee that the interior pipe that natural core and elastomeric material are processed closely contacts, and covers CT reformer upper end cover in rapidly natural core being packed into.
The 3rd step is with the CT reformer CT that packs into.Constitute the temperature-control pressure-control fluid cavity between two end caps, overcoat and the interior pipes; Adopt a connection circulating fluid import of constant temperature fluid bath and a circulating fluid outlet that circulating fluid is provided to the temperature-control pressure-control fluid cavity; Open the constant temperature and pressure bath; Feed cryogenic high pressure nitrogen, guarantee the natural core land burial of its pressure and temperature term harmonization; The temperature pressure sensing device of outer casing inner wall detects the temperature and the pressure of nitrogen; Two end caps insert pipeline respectively provides the fluid Vomitory; The CT reformer is fixed on the CT objective table.
In the 4th step, carry out CT and reform.The temperature, pressure parameter is gathered through dull and stereotyped heat resource method in real time, utilizes the CT scan imaging device that process is carried out synchronous, visual detection.
Claims (2)
1. the natural core CT of a gas hydrate reformer is characterized in that,
This device comprises end cap, interior pipe, outer tube, O RunddichtringO, dull and stereotyped heat power supply device, and two end caps and interior pipe constitute hollow structure, the natural core of packing in the interior pipe; Simultaneously, constitute loop temperature-control pressure control cavity between two end caps and outer tube, the interior pipe, the temperature that is used to guarantee natural core sample gets into from the import of bottom end cover torus with the circulation cryogenic high pressure nitrogen of pressure, through upper end cover torus outlet outflow; The inwall of outer tube is provided with the temperature pressure sensing device interface, is used to detect the temperature and the pressure of constant-temperature temperature-control pressure control cavity inner fluid; Said end cap, outer tube adopt titanium alloy material, and interior pipe adopts elastomeric material; Outer tube and end cap junction adopt the O RunddichtringO that torus is sealed; The hollow structure bottom is provided with dull and stereotyped heat power supply device, is used to detect the heat transfer characteristic of natural core.
2. the method for application of the natural core CT of a gas hydrate reformer is characterized in that comprising the steps:
The first step is carried out the pressure release cooling with the natural core of gathering with low temperature liquid nitrogen and is handled, and guarantees not decompose;
Second step is with the natural core CT reformer of packing into: open CT reformer upper end cover, in the pipe, guarantee that the interior pipe that natural core and elastomeric material are processed closely contacts, and covers CT reformer upper end cover in rapidly natural core being packed into;
The 3rd step; With the CT reformer CT that packs into: constitute the temperature-control pressure-control fluid cavity between two end caps, overcoat and the interior pipes; Adopt a connection circulating fluid import of constant temperature fluid bath and a circulating fluid outlet that circulating fluid is provided to the temperature-control pressure-control fluid cavity; Open the constant temperature and pressure bath, feed cryogenic high pressure nitrogen, guarantee the natural core land burial of its pressure and temperature term harmonization; The temperature pressure sensing device of outer casing inner wall detects the temperature and the pressure of nitrogen; Two end caps insert pipeline respectively provides the fluid Vomitory; The CT reformer is fixed on the CT objective table;
In the 4th step, carry out CT and reform: the temperature, pressure parameter is gathered through dull and stereotyped heat resource method in real time, utilizes the CT scan imaging device that process is carried out synchronous, visual detection.
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Cited By (9)
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|---|---|---|---|---|
| CN103630560A (en) * | 2013-11-04 | 2014-03-12 | 大连理工大学 | Device and method for CT (Computed Tomography) scanning of low-temperature sample |
| CN105424734A (en) * | 2016-01-12 | 2016-03-23 | 大连理工大学 | Low-temperature high-pressure control device for observing aquo-complex generation and decomposition characteristics through X-ray CT device |
| CN106290421A (en) * | 2016-09-14 | 2017-01-04 | 大连理工大学 | A kind of hydrate growth speed based on Microfocus X-ray X ray CT and effective volume measurement apparatus and method |
| CN106872497A (en) * | 2017-05-03 | 2017-06-20 | 青岛海洋地质研究所 | The special hydrate resistivity test devices of CT and method |
| CN106950355A (en) * | 2017-05-23 | 2017-07-14 | 中国石油大学(华东) | A kind of ocean gas hydrate with the comprehensive on-line measuring device of ship and method |
| CN107976351A (en) * | 2017-11-27 | 2018-05-01 | 大连理工大学 | A kind of ocean gas hydrate core remodeling device and method |
| CN107991164A (en) * | 2017-10-30 | 2018-05-04 | 大连理工大学 | A kind of sea bed gas hydrate rock core sound wave type plane strain instrument device |
| CN109625622A (en) * | 2018-10-25 | 2019-04-16 | 中国辐射防护研究院 | A kind of core pressurized seal save set and method |
| CN111812131A (en) * | 2020-07-21 | 2020-10-23 | 中国科学院地质与地球物理研究所 | Visual test system and method for secondary generation or decomposition process of hydrate |
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Cited By (15)
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|---|---|---|---|---|
| CN103630560B (en) * | 2013-11-04 | 2016-01-13 | 大连理工大学 | A kind of device and method for cryogenic sample CT scan |
| CN103630560A (en) * | 2013-11-04 | 2014-03-12 | 大连理工大学 | Device and method for CT (Computed Tomography) scanning of low-temperature sample |
| CN105424734B (en) * | 2016-01-12 | 2018-04-10 | 大连理工大学 | A kind of cryogenic high pressure control device generated for X ray CT equipment observation water compound with resolution characteristic |
| CN105424734A (en) * | 2016-01-12 | 2016-03-23 | 大连理工大学 | Low-temperature high-pressure control device for observing aquo-complex generation and decomposition characteristics through X-ray CT device |
| CN106290421A (en) * | 2016-09-14 | 2017-01-04 | 大连理工大学 | A kind of hydrate growth speed based on Microfocus X-ray X ray CT and effective volume measurement apparatus and method |
| CN106290421B (en) * | 2016-09-14 | 2018-12-21 | 大连理工大学 | A kind of hydrate growth rate and effective volume measuring device and method based on Microfocus X-ray X ray CT |
| CN106872497A (en) * | 2017-05-03 | 2017-06-20 | 青岛海洋地质研究所 | The special hydrate resistivity test devices of CT and method |
| CN106950355A (en) * | 2017-05-23 | 2017-07-14 | 中国石油大学(华东) | A kind of ocean gas hydrate with the comprehensive on-line measuring device of ship and method |
| CN106950355B (en) * | 2017-05-23 | 2023-08-11 | 中国石油大学(华东) | Marine natural gas hydrate on-line comprehensive detection device and method |
| CN107991164A (en) * | 2017-10-30 | 2018-05-04 | 大连理工大学 | A kind of sea bed gas hydrate rock core sound wave type plane strain instrument device |
| CN107976351A (en) * | 2017-11-27 | 2018-05-01 | 大连理工大学 | A kind of ocean gas hydrate core remodeling device and method |
| CN109625622A (en) * | 2018-10-25 | 2019-04-16 | 中国辐射防护研究院 | A kind of core pressurized seal save set and method |
| CN111812131A (en) * | 2020-07-21 | 2020-10-23 | 中国科学院地质与地球物理研究所 | Visual test system and method for secondary generation or decomposition process of hydrate |
| CN111812131B (en) * | 2020-07-21 | 2020-12-25 | 中国科学院地质与地球物理研究所 | Visual test system and method for secondary generation or decomposition process of hydrate |
| US11041819B1 (en) | 2020-07-21 | 2021-06-22 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Visual test system and method for secondary generation or decomposition process of hydrate |
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