CN104034849B - Testing method for mechanical property change of natural gas hydrate during decomposition - Google Patents
Testing method for mechanical property change of natural gas hydrate during decomposition Download PDFInfo
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- CN104034849B CN104034849B CN201410230369.1A CN201410230369A CN104034849B CN 104034849 B CN104034849 B CN 104034849B CN 201410230369 A CN201410230369 A CN 201410230369A CN 104034849 B CN104034849 B CN 104034849B
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Abstract
The invention relates to a testing method for mechanical property of natural gas hydrate, and in particular relates to a testing method for mechanical property change of natural gas hydrate during decomposition. The testing method is characterized in that a hydrate sample is placed in a (super) magnetizer temperature controller, the ambient temperature of the hydrate can be accurately controlled, the practical decomposition condition of the hydrate during extraction can be fully simulated, and the mechanical property change of the hydrate during decomposition can be tested. The method comprises the following steps: sample preparation, selection of the testing method, and data acquisition. The method can be used for simulating to test the mechanical property change of the in-situ formation hydrate.
Description
Technical field
The present invention relates to a kind of test method of gas hydrates mechanical characteristic, more particularly, to a kind of natural gas hydration
The test method of change of mechanical property in thing catabolic process.
Background technology
Gas hydrates are widely distributed in continent, the slope area on island, activity and passive continental margin in nature
Bump pad, polar region continental shelf and ocean and some inland lakes deepwater environment.The formation condition of gas hydrates: low
Temperature, generally below 10 DEG C of temperature；High pressure, pressure is generally greater than 10mpa；Sufficient natural gas (hydro carbons, based on methane) gas
Source；Favourable hydrate preservation space.The gas source that gas hydrates are formed is mainly: is present in the organic matter in deep
Migrate by gas produced by pyrolysises and upwards；Microbial degradation Effects of Organic Matter in Sediments and the gas that produces；Volcano is made
With the gas producing；Air dissolves.According to the analysis of conditions above and detection, gas hydrates are distributed mainly on high latitude
Land (tundra) and seabed.According to statistics, gas hydrates are all contained in 90% marine site, are distributed in the land in each oceanic margin marine site
Slope, continental rise and basin and part inland sea, in special environment, then can be in seabed surface enrichment.
From natural gas hydrate deposit, harvesting natural gas can make submarine sedimentary strata intensity decreases, increases the shakiness of sea bed
Qualitative, geology may be caused to subside, the disaster such as submarine landslide.How economical and efficient, the exploitation of gas hydrate of safety, simultaneously
Submarine landslide and sedimentary will not be caused again to cave in and to wait geological disaster, need the mechanical characteristic of further investigation hydrate sediment.
Content of the invention
The purpose of the present invention is to propose to during a kind of new test decomposition of hydrate mechanical characteristic test method, energy
Effectively solve the resolution problem that sample brings in transfer process, the result recording is more reliable, closer to practical situation.
The present invention adopts the following technical scheme that
A kind of test method of gas hydrates mechanical characteristic: adopt following steps: 1. make gas hydrates examination
Sample；2. sample to be determined is installed, adjusts sample position to be determined；The installation of sample to be determined is included sample encapsulation in magnetic conductor
In the magnetic conductor outer sleeve of temperature controller, it is respectively mounted seepage flow plate and lower seepage flow plate, oozes upper in sample upper and lower
Above stream plate, upper pressure anvil block is installed, forms an assembly, then combinations thereof body is accurately installed on base, entirely
Installing anabolic process must keep the centrage of sample, upper seepage flow plate, lower seepage flow plate, upper pressure anvil block and base to hang down at one
On straight line；3. pass through sample top exhaust port and sample bottom drainage interface connects external exhaust gas, drainage collection equipment；4. connect
Connect data acquisition equipment；5. choice experiment method simulation exploitation of gas hydrates acquisition and recording experimental data, wherein magnetic conduction
Temperature controller realizes the change of CURRENT DISTRIBUTION by the density and direction controlling magnetic flux, reaches required heating requirements,
Magnetic conductor temperature controller can achieve that temperature-gradient method controls, and realizes the effect of repeatedly heat injection in the actual exploitation of simulation.
Brief description
Fig. 1 is the schematic device of change of mechanical property test method during gas hydrate dissociation of the present invention.
Fig. 2 is the device sample parts office of change of mechanical property test method during gas hydrate dissociation of the present invention
Enlarged diagram.
The each labelling of in figure is as follows: 1 piston rod, 2 external cylinders, 3 magnetic conductor temperature controllers, 4 split buckles, 5 sleeves, 6
Confined pressure oil filler point, 7 bases, 8 bottom injecting holes, 9 confined pressure spill ports, 10 sealing rings, 11 times seepage flow plates, 12 samples, seepage flow on 13
Plate, 14 top gas injection interfaces, 15 upper pressure anvils, 16 sample exhaust ports, 17 sample drainage interfaces.
Specific embodiment
The present invention is described in more detail below in conjunction with the accompanying drawings:
1. a kind of test method of gas hydrates mechanical characteristic: it is characterized in that: step is as follows:
1) make gas hydrates sample；
2) sample to be determined is installed, adjusts sample position to be determined；The installation of sample to be determined is included sample 12 encapsulation
In the magnetic conductor outer sleeve of magnetic conductor temperature controller, sample 12 upper and lower be respectively mounted seepage flow plate 13 and under ooze
Flow plate 11, above upper seepage flow plate 13, upper pressure anvil block 15 be installed, and combinations thereof body is accurately installed on base 7,
Whole anabolic process of installing must keep sample 12, upper seepage flow plate 13, lower seepage flow plate 11, upper pressure anvil block 15 and base 7
Centrage is on a vertical line；
3) external exhaust gas are connected by sample top exhaust port 16 and sample bottom drainage interface 17, drainage collection sets
Standby；
4) connect data acquisition equipment；
5) choice experiment method simulation exploitation of gas hydrates acquisition and recording experimental data.
During (a) decompression method simulating hydrate exploitation, realized by changing the pressure differential between upper and lower two end faces of sample,
Needs according to experimental precision arrange suitable pressure drop gradient, step pressure reducing, and the experimental data such as sample mechanics parameter passes in real time
Defeated to data handling equipment such as outside industrial computers, the gas producing is decomposed in sample decompression and water passes through aerofluxuss and drainage interface even
Aerogenesis and product water number evidence that the collecting device being connected to outside can respectively obtain in experimentation.
During the exploitation of (b) heat shock method simulating hydrate, realized by magnetic conductor temperature controller, wherein magnetic conductor temperature control
Device realizes the change of CURRENT DISTRIBUTION, the heating requirements required for reaching by the density and direction adjusting magnetic flux.Setting experiment institute
Need temperature input controller can simulating hydrate heat shock method exploit, temperature-gradient method control can also be realized simultaneously, realize simulation
The effect of repeatedly heat injection in actual exploitation.The experimental datas such as sample mechanics parameter are transferred to the data such as the industrial computer of outside in real time
The collecting device that processing equipment, the gas that sample heat resolve produces and water are connected to outside by aerofluxuss and drainage interface is permissible
Respectively obtain the aerogenesis in experimentation and produce water number evidence.
Embodiment described above, the simply present invention more preferably specific embodiment, those skilled in the art is at this
The usual variations and alternatives carrying out in the range of inventive technique scheme all should comprise within the scope of the present invention.
Claims (1)
1. a kind of test method of gas hydrates mechanical characteristic: adopt following steps: 1. make gas hydrates sample；
2. sample to be determined is installed, adjusts sample position to be determined；The installation of sample to be determined is included sample (12) encapsulation in magnetic conduction
In the magnetic conductor outer sleeve of temperature controller, it is respectively mounted upper seepage flow plate (13) and lower seepage flow in sample (12) upper and lower
Plate (11), installation upper pressure anvil block (15) above upper seepage flow plate (13), form an assembly, then by combinations thereof body
Accurately it is installed on base (7), whole anabolic process of installing must keep sample (12), upper seepage flow plate (13), lower seepage flow plate
(11), the centrage of upper pressure anvil block (15) and base (7) is on a vertical line；3. pass through sample top exhaust port
(16) and sample bottom drainage interface (17) connect external exhaust gas, drainage collection equipment；4. connect data acquisition equipment；5. select
Experimental technique simulates exploitation of gas hydrates and acquisition and recording experimental data, wherein magnetic conductor temperature controller are passed through to control magnetic
The change of CURRENT DISTRIBUTION is realized in logical density and direction, the heating requirements required for reaching, and magnetic conductor temperature controller can achieve
Temperature-gradient method controls, and realizes the effect of repeatedly heat injection in the actual exploitation of simulation.
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| CN201410230369.1A CN104034849B (en) | 2014-05-28 | 2014-05-28 | Testing method for mechanical property change of natural gas hydrate during decomposition |
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| CN201410230369.1A CN104034849B (en) | 2014-05-28 | 2014-05-28 | Testing method for mechanical property change of natural gas hydrate during decomposition |
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| CN104034849A CN104034849A (en) | 2014-09-10 |
| CN104034849B true CN104034849B (en) | 2017-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104458527A (en) * | 2014-11-05 | 2015-03-25 | 山东科技大学 | Device for measuring porosity and permeability coefficient of natural gas hydrate |
| CN104360021A (en) * | 2014-11-06 | 2015-02-18 | 河海大学 | Testing device for simulating exploitation of natural gas hydrate from deep-sea energy soil |
| CN105138731B (en) * | 2015-07-27 | 2018-02-13 | 中国海洋石油总公司 | A kind of decomposition of hydrate causes submarine slope unstability evaluation system and method |
| CN114459961B (en) * | 2022-02-10 | 2024-02-13 | 南方海洋科学与工程广东省实验室(广州) | Natural gas hydrate transportation and aggregation physical simulation device and experimental method |
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| SU1700446A1 (en) * | 1988-12-14 | 1991-12-23 | Институт Физико-Технических Проблем Севера Якутского Филиала Со Ан Ссср | Plant for gas hydrate study |
| JP5010901B2 (en) * | 2006-11-21 | 2012-08-29 | 中国電力株式会社 | Ship |
| CN101050697A (en) * | 2007-04-06 | 2007-10-10 | 中国科学院广州能源研究所 | One dimension production analogue test device for natural gas hydrate |
| CN102042930B (en) * | 2010-07-01 | 2013-07-10 | 青岛海洋地质研究所 | Gas hydrate mechanical property experiment device |
| CN102564853A (en) * | 2010-12-08 | 2012-07-11 | 中国海洋石油总公司 | Natural gas hydrate rock mechanical triaxial tester |
| CN102162779B (en) * | 2011-01-07 | 2013-05-29 | 中国海洋石油总公司 | Triaxial test device for in-situ generation and decomposition of natural gas hydrate |
| KR101350340B1 (en) * | 2012-05-08 | 2014-01-13 | 한국지질자원연구원 | Production simulation system for gas hydrate and the production simulation method using the same |
| CN103616290A (en) * | 2013-11-14 | 2014-03-05 | 大连理工大学 | Dynamic loading system for measuring dynamic characteristics of natural gas hydrate sediments |
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