CN102564853A - Natural gas hydrate rock mechanical triaxial tester - Google Patents
Natural gas hydrate rock mechanical triaxial tester Download PDFInfo
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- CN102564853A CN102564853A CN2010105864011A CN201010586401A CN102564853A CN 102564853 A CN102564853 A CN 102564853A CN 2010105864011 A CN2010105864011 A CN 2010105864011A CN 201010586401 A CN201010586401 A CN 201010586401A CN 102564853 A CN102564853 A CN 102564853A
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Abstract
The invention discloses a natural gas hydrate rock mechanical triaxial tester. The tester comprises a closed pressure chamber composed of a cylinder body, a pedestal and an upper cover; the pedestal is provided with at least one oil inlet, at least one gas inlet and at least two sonic line connection holes; the upper part of the cylinder body is provided with at least one gas inlet; the upper cover is provided with a piston; the piston is connected with a mobile crossbeam on the outside of the closed pressure chamber; a lower sample pressing seat and an upper sample pressing seat which correspond with each other are arranged in the cavity of the closed pressure chamber; the upper sample pressing seat corresponds with the position of the piston, and the lower sample pressing seat is fixed on the pedestal; and sound probes are arranged in the upper sample pressing seat and the lower sample pressing seat.
Description
Technical field
The present invention relates to a kind of rock mechanics laboratory testing rig, be specifically related to gas hydrate rock mechanics triaxial test device.
Background technology
Gas hydrate are that a kind of reserves are abundant, the green clean energy resource of high-energy-density.Along with the fast development of world economy, the hydrocarbon resources lot of consumption.The gross energy of world's gas hydrate is about coal, oil, gas summation 2～3 times, is significant for alleviating the hydrocarbon resources anxiety.
Gas hydrate are under certain temperature and pressure condition, the class ice of forming by natural G&W, the cage modle crystalline compounds.It is distributed widely in the deepwater environment of bump pad, continental platform, polar region and ocean and some interior lakes of area, slope, activity and the passive continental margin on continent, island.The sixties in 20th century; Soviet Union scientist finds at first that in the tundra, land first has that the gas hydrate gas field of commercial extraction value---Mai Suoya breathes out after the field; Caused the common concern of countries in the world, wherein the research of states such as the United States, Russia, day, method is comparatively extensive.Since 1999, China Geological Survey Bureau has carried out earthquake of high resolving power multiple tracks and investigation works such as deep-sea geological sampling, bottom photography to gas hydrate in China's THE NORTHERN SLOPE OF SOUTH CHINA SEA.The survey showed that, and there is abundant gas hydrate resource in China marine site.China obtains actual hydrate sample in May, 2007 through probing, estimates to realize the runin of hydrate is adopted in 2016.
In the drilling process on gas hydrate stratum; Drilling fluid makes hydrate decomposition in various degree; Obvious variation can take place in mechanical properties such as sedimental intensity of gas hydrate and modulus, and hydrate sediment intensity reduces, and makes that collapsing appears in the borehole wall, rock gas is dissolved in the drilling fluid.This process increases engineering risks such as well kick, well slough.The sedimental intensive parameter of gas hydrate is the important parameter of hole stability analysis and hydrate development evaluation.Notice in the past mainly concentrates on the research aspect to the synthetic pure water compound physical characteristics in laboratory, and the research of developing to the ocean water compound just just begins.Because the stable temperature, pressure environment that need be specific of gas hydrate; The at present still untapped equipment that goes out to the experiment of gas hydrate sediment mechanical property, three experimental techniques of conventional rock mechanics and equipment are difficult to obtain and the hydrate appearance that maintains the original state is carried out triaxial strength and acoustic measurement.
Summary of the invention
The purpose of this invention is to provide a kind of gas hydrate rock mechanics triaxial test device; (or directly to hydrate deposit sample) carried out three experiments of gas hydrate after said experimental provision can be used for the original position synthesized hydrate; Record stress-strain curve, elastic modulus, Poisson ratio, cohesion, the angle of internal friction of hydrate sediment, can record the acoustics parameters of gas hydrate sample simultaneously; These basic datas provide basic data for research gas hydrate stratum wellbore stability, exploitation decomposition later on.
Gas hydrate rock mechanics triaxial test device provided by the invention comprises the seal-off pressure chamber of being made up of cylindrical shell, base and loam cake; Said base is provided with at least one oil supply hole, at least one air admission hole and at least two sound wave lines and connects the hole; The top of said cylindrical shell is provided with at least one venthole; Cover on said and be provided with piston; This piston links to each other with the outdoor moving beam of said seal-off pressure; Be provided with corresponding sample down pressing seat and sample upper pressure seat in the said seal-off pressure chamber; Said sample upper pressure seat is corresponding with said position of piston, and said sample down pressing seat is fixed on the said base; Be equipped with sonic probe in said sample upper pressure seat and the sample down pressing seat.
In the above-mentioned triaxial test device, said base and loam cake all are tightly connected through latch segment and said cylindrical shell.
In the above-mentioned triaxial test device, the inboard of said base and loam cake and said cylindrical shell all is tightly connected through O-ring seal a.
In the above-mentioned triaxial test device, said base is provided with an oil supply hole, two air admission holes and two sound wave lines and connects the hole; The top of said cylindrical shell is provided with a venthole.
In the above-mentioned triaxial test device, said sample down pressing seat is fixed on the said base through register pin.
In the above-mentioned triaxial test device, said sample upper pressure seat is provided with pressure pad on the sample; Said sample down pressing seat is provided with pressure pad under the sample.
In the above-mentioned triaxial test device, said piston and said loam cake are tightly connected through O-ring seal b.
In the above-mentioned triaxial test device, be provided with thermal insulation board between said moving beam and the said piston.
In the above-mentioned triaxial test device, the lower surface of said base is provided with slide rail, like line slideway, is convenient to moving of said triaxial test device.
In the above-mentioned triaxial test device, said piston is connected with said sample upper pressure seat.
Gas hydrate rock mechanics triaxial test device provided by the invention has following beneficial effect: with gas hydrate synthetic with decomposition with and mechanical property, acoustic properties be connected effectively; The triaxial cell has been carried out effective the combination with the gas hydrate agitated reactor; Avoided the decomposition of hydrate problem in the operating process such as mould sample preparation, dress appearance; Realized synchro measure, filled up the blank of domestic hydrate sediment mechanical property experiment and measuring equipment the rerum natura and the mechanical property parameter of gas hydrate sediment sample.
Description of drawings
Fig. 1 is the structural representation of gas hydrate rock mechanics triaxial test device of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further, but the present invention is not limited to following examples.
The structural representation of gas hydrate rock mechanics triaxial test device of the present invention is as shown in Figure 1; Each mark is following among the figure: pressure pad, 17 oil supply holes, 18 air admission holes, 19 O-ring seal a under pressure pad, 15 samples on 1100KN load sensor, 2 moving beams, 3 thermal insulation boards, 4 pistons, 5 loam cakes, 6 O-ring seal b, 7 ventholes, 8 cylindrical shells, 9 sample upper pressure seats, 10 sample down pressing seat, 11 bases, 12 line slideways, 13,16 latch segments, 14 samples.
Gas hydrate rock mechanics triaxial test device of the present invention comprises the seal-off pressure chamber of being made up of cylindrical shell 8, base 11 and loam cake 5; Base 11 places on two line slideways 12 so that move; Base 11 is tightly connected with cylindrical shell 8 through two latch segments 16 and two O-ring seal a 19; Loam cake 5 is tightly connected through two latch segments 13 and two O-ring seal a and cylindrical shell 8; Cylindrical shell 8 is provided with sample down pressing seat 10, and sample down pressing seat 10 is fixed on the base 11 through the register pin (not shown); Sample down pressing seat 10 is provided with pressure pad 15 under the sample; Sample down pressing seat 10 is provided with sample upper pressure seat 9, and sample upper pressure seat 9 is provided with pressure pad 14 on the sample, and sample down pressing seat 10 is corresponding with sample upper pressure seat 9 positions; Place rock sample between sample down pressing seat 10 and the sample upper pressure seat 9 to form gas hydrate; All be inlaid with 1 sonic probe (not shown) in sample down pressing seat 10 and the sample upper pressure seat 9, in pressurization, detect acoustic velocity like this; Base 11 is provided with an oil supply hole 17, two air admission holes 18 and two sound wave lines and connects the hole (not shown); Oil supply hole 17 is communicated with the fuel delivery device of outer setting, and delivery hydraulic pressure oil is to form confined pressure to sample in cylindrical shell 8; From two air admission holes 18, feed methane gas with the synthesizing methane hydrate; The sonic probe of inlaying in sample down pressing seat 10 and the sample upper pressure seat 9 connects the hole through two sound wave lines and is connected with the sonic apparatus of outer setting, so that the detected signal of sonic probe is input in the sonic apparatus; The top of cylindrical shell 8 is provided with a venthole 8; The middle part of loam cake 5 is provided with piston 4, and piston 4 is tightly connected with loam cake 5 through O-ring seal b 6; Piston 4 links to each other with the outdoor moving beam 2 of seal-off pressure, and piston 4 links to each other with sample upper pressure seat 9; Be provided with thermal insulation board 3 between moving beam 2 and the piston 4; Apply axle pressure through moving beam 2 to sample; The top of moving beam 2 is provided with a 100KN load sensor, is used to measure the size of axial force, and is sent to the computer control system that is connected with this triaxial test device to the value of being surveyed.
In the above-mentioned gas hydrate rock mechanics triaxial test device, base 11 can also be connected through other sealing means with cylindrical shell 8 with loam cake 5, like interference fit; The material of cylindrical shell 11 with big under can regulate as required; The quantity of the sonic probe of inlaying in sample down pressing seat 10 and the sample upper pressure seat 9 can be regulated as required; Piston 4 can also be connected through other sealing means with loam cake 5, like interference fit.
When using gas hydrate rock mechanics triaxial test device of the present invention, sample is contained on the sample down pressing seat 10, sample upper pressure seat 9 is installed then; Then through oil supply hole 17 to the indoor hydraulic oil that charges into of seal-off pressure; When having hydraulic oil to overflow in the venthole 7, close venthole 7, continue after the pressure and temperature in the cylindrical shell 11 reaches the stationary value of gas hydrate formation, to stop in cylindrical shell 11, charging into hydraulic oil to the indoor hydraulic oil that charges into of seal-off pressure; Simultaneously, in cylindrical shell 11, feed the amount of methane gas and record feeding gas through air admission hole 18; Test the sedimental acoustic velocity of methane hydrate through being embedded in sample upper pressure seat 9 with the sonic probe in the sample down pressing seat 10 then; Apply axle pressure through driving moving beam 2 and piston 4 to sample after accomplishing, simultaneously through the axial strain of control system record, radial strain Changing Pattern with axial stress.Experiment is opened venthole 7 usefulness air pumps the hydraulic oil in the cylindrical shell 8 is blown out after finishing; Open latch segment 16 then, cylindrical shell 8 is raised up, take out the rock sample of finishing test.
Claims (10)
1. gas hydrate rock mechanics triaxial test device, it is characterized in that: it comprises the seal-off pressure chamber of being made up of cylindrical shell, base and loam cake; Said base is provided with at least one oil supply hole, at least one air admission hole and at least two sound wave lines and connects the hole; The top of said cylindrical shell is provided with at least one venthole; Cover on said and be provided with piston; This piston links to each other with the outdoor moving beam of said seal-off pressure; Be provided with corresponding sample down pressing seat and sample upper pressure seat in the said seal-off pressure chamber; Said sample upper pressure seat is corresponding with said position of piston, and said sample down pressing seat is fixed on the said base; Be equipped with sonic probe in said sample upper pressure seat and the sample down pressing seat.
2. triaxial test device according to claim 1 is characterized in that: said base and loam cake all are tightly connected through latch segment and said cylindrical shell.
3. triaxial test device according to claim 1 and 2 is characterized in that: the inboard of said base and loam cake and said cylindrical shell all is tightly connected through O-ring seal a.
4. according to arbitrary described triaxial test device among the claim 1-3, it is characterized in that: said base is provided with an oil supply hole, two air admission holes and two sound wave lines and connects the hole; The top of said cylindrical shell is provided with a venthole.
5. according to arbitrary described triaxial test device among the claim 1-4, it is characterized in that: said sample down pressing seat is fixed on the said base through register pin.
6. according to arbitrary described triaxial test device among the claim 1-5, it is characterized in that: said sample upper pressure seat is provided with pressure pad on the sample; Said sample down pressing seat is provided with pressure pad under the sample.
7. according to arbitrary described triaxial test device among the claim 1-6, it is characterized in that: said piston and said loam cake are tightly connected through O-ring seal b.
8. according to arbitrary described triaxial test device among the claim 1-7, it is characterized in that: be provided with thermal insulation board between said moving beam and the said piston.
9. according to arbitrary described triaxial test device among the claim 1-8, it is characterized in that: the lower surface of said base is provided with slide rail; Said slide rail is a line slideway.
10. according to arbitrary described triaxial test device among the claim 1-9, it is characterized in that: said piston is connected with said sample upper pressure seat.
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| CN2010105864011A CN102564853A (en) | 2010-12-08 | 2010-12-08 | Natural gas hydrate rock mechanical triaxial tester |
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| CN2010105864011A CN102564853A (en) | 2010-12-08 | 2010-12-08 | Natural gas hydrate rock mechanical triaxial tester |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914469A (en) * | 2012-11-02 | 2013-02-06 | 浙江科技学院 | Longitudinal force applying and detecting device of lamellar structure rock mass |
| CN103196490A (en) * | 2013-03-19 | 2013-07-10 | 中国科学院力学研究所 | High-pressure triaxial pressure chamber comprising multiple measuring units |
| CN103674679A (en) * | 2012-08-30 | 2014-03-26 | 中国石油化工股份有限公司 | Device and method for testing mechanical properties of fracture-vug type carbonate rock reservoir environment |
| CN104034849A (en) * | 2014-05-28 | 2014-09-10 | 山东科技大学 | Testing method for mechanical property change of natural gas hydrate during decomposition |
| CN104833582A (en) * | 2015-05-21 | 2015-08-12 | 大连理工大学 | Natural gas hydrate sediment triaxial test device |
| CN105403468A (en) * | 2015-12-29 | 2016-03-16 | 华中科技大学 | Creep testing machine |
| CN106769519A (en) * | 2017-03-06 | 2017-05-31 | 中国人民解放军理工大学 | A kind of pseudo- three axles method of testing based on dynamic fatigue test machine |
| CN109668916A (en) * | 2018-12-11 | 2019-04-23 | 大连理工大学 | A kind of hydrate sediment CT Triaxial tester |
| CN109752256A (en) * | 2019-02-20 | 2019-05-14 | 中国地质大学（武汉） | Measure the Dynamic triaxial test device and method of natural gas hydrate deposits object dynamic strain |
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| CN201662512U (en) * | 2010-03-19 | 2010-12-01 | 中国科学院武汉岩土力学研究所 | Device for testing compressibility coefficient of soil containing hydrates of natural gas |
| CN201965059U (en) * | 2010-12-08 | 2011-09-07 | 中国海洋石油总公司 | Rock mechanics triaxial test device of natural gas hydrate |
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| CN201662512U (en) * | 2010-03-19 | 2010-12-01 | 中国科学院武汉岩土力学研究所 | Device for testing compressibility coefficient of soil containing hydrates of natural gas |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674679A (en) * | 2012-08-30 | 2014-03-26 | 中国石油化工股份有限公司 | Device and method for testing mechanical properties of fracture-vug type carbonate rock reservoir environment |
| CN103674679B (en) * | 2012-08-30 | 2016-01-20 | 中国石油化工股份有限公司 | Fracture-cavity type carbonate reservoir environment mechanical property test device and test method |
| CN102914469A (en) * | 2012-11-02 | 2013-02-06 | 浙江科技学院 | Longitudinal force applying and detecting device of lamellar structure rock mass |
| CN103196490B (en) * | 2013-03-19 | 2016-01-13 | 中国科学院力学研究所 | Containing the high-pressure triaxial pressure chamber of many measuring units |
| CN103196490A (en) * | 2013-03-19 | 2013-07-10 | 中国科学院力学研究所 | High-pressure triaxial pressure chamber comprising multiple measuring units |
| CN104034849A (en) * | 2014-05-28 | 2014-09-10 | 山东科技大学 | Testing method for mechanical property change of natural gas hydrate during decomposition |
| CN104833582A (en) * | 2015-05-21 | 2015-08-12 | 大连理工大学 | Natural gas hydrate sediment triaxial test device |
| CN105403468A (en) * | 2015-12-29 | 2016-03-16 | 华中科技大学 | Creep testing machine |
| CN105403468B (en) * | 2015-12-29 | 2018-06-19 | 华中科技大学 | A kind of creep testing machine |
| CN106769519A (en) * | 2017-03-06 | 2017-05-31 | 中国人民解放军理工大学 | A kind of pseudo- three axles method of testing based on dynamic fatigue test machine |
| CN106769519B (en) * | 2017-03-06 | 2019-05-17 | 中国人民解放军理工大学 | A kind of three axis test method of puppet based on dynamic fatigue test machine |
| CN109668916A (en) * | 2018-12-11 | 2019-04-23 | 大连理工大学 | A kind of hydrate sediment CT Triaxial tester |
| CN109752256A (en) * | 2019-02-20 | 2019-05-14 | 中国地质大学（武汉） | Measure the Dynamic triaxial test device and method of natural gas hydrate deposits object dynamic strain |
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Application publication date: 20120711 |