CN101819132B - Method for realizing rock salt dissolving characteristic test under triaxial stress condition - Google Patents
Method for realizing rock salt dissolving characteristic test under triaxial stress condition Download PDFInfo
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- CN101819132B CN101819132B CN2010101439272A CN201010143927A CN101819132B CN 101819132 B CN101819132 B CN 101819132B CN 2010101439272 A CN2010101439272 A CN 2010101439272A CN 201010143927 A CN201010143927 A CN 201010143927A CN 101819132 B CN101819132 B CN 101819132B
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Abstract
The invention discloses a method for realizing a rock salt dissolving characteristic test under a triaxial stress condition, comprising the following steps: firstly, selecting rock salt, preparing into a rock salt test piece with a cylindrical structure, and arranging a limber hole on the central shaft of the rock salt test piece upwards; then applying ambient pressure on the rock salt test piece from the periphery thereof, and applying axial pressure on the rock salt test piece from the axial direction thereof; and finally enabling miring water to flow through the limber hole and performing the dissolving test. The invention can regulate and control dissolving parameters such as stress state, miring water pressure, miring water concentration, miring water flow rate, miring water temperature and the like of the rock salt test piece in the test process so as to enable the rock salt test piece to be in a triaxial stress state, thus achieving the purpose of veritably simulating an actual dissolving environment.
Description
Technical field
The present invention relates to the method for rock salt dissolving characteristic test under the stress condition, relate in particular to a kind of method that realizes rock salt dissolving characteristic test under triaxial stress condition.
Background technology
Relative other deposit mode, rock salt underground oil and gas warehouse have safety, economic characteristics, but external rock salt underground storage has still the time accident that (like hydrocarbon seepage, dissolve chamber inefficacy, subsidence etc.) takes place.At present external underground rock salt bank is nearly all built in the huge thick salt dome, and China can build the rock salt of underground storage and is stratiform rock salt, has thin thickness, interlayer is many, grade is low, the characteristics of buried depth big (it is 2000m that the Hubei cloud is answered the rock stratum buried depth).The underground rock salt bank construction of China difficulty is bigger by contrast, operation risk is higher.The shape of control rock salt underground storage is the minimizing accident and avoids one of main means of operational risk that the bank with ideal form has better stability, leakproofness and longer serviceable life.The rock salt dissolving The Characteristic Study is the basis of rock salt bank shape control, yet owing to be limited by experimental technique, almost fails to carry out to China's dissolving characteristic test of stratiform rock salt under condition of triaxial stress.In the prior art, getting rock salt piece appearance is processed into the square sample respectively, and encapsulation process is carried out on five surfaces of square sample, so that dissolving only takes place on a face.Tang Yanchun makes the fine observation mechanical test that under the uniaxial compression condition, has carried out rock salt stress-dissolving coupling effect in this way; Studied rock salt mesomechanics character, rock salt dissolving stage mechanical property variation and under different collapse states the Changing Pattern of rock salt erosion rate, show that stress state is very big to the influence of rock salt erosion rate.
Therefore, all there is following deficiency in existing test method: one, rock salt only receives simple stress, can't realize the solubility test under the condition of triaxial stress; Two, be difficult to realize dissolving the isoparametric unified regulation and control of pressure, concentration, flow velocity and temperature of water.
Summary of the invention
To weak point of the prior art; It is stressed to the invention provides three in a kind of rock salt, dissolving hydraulic pressure, concentration, temperature and adjustable-speed, and easy to adjust; The method of the realization rock salt dissolving characteristic test under triaxial stress condition that measuring accuracy is higher simultaneously; This method is the actual dissolving of real simulated rock salt environment more, to obtain more real test figure, is used for instructing engineering actual.
The method of realization rock salt dissolving characteristic test under triaxial stress condition provided by the invention at first, is chosen the rock salt test specimen that rock salt is made into cylindrical-shaped structure, at rock salt test specimen central shaft the limbers is set upwards; Then, from applying confined pressure to the rock salt test specimen on every side, and apply axial compression to the rock salt test specimen from axially going up; Again then, will dissolve water flows through from the limbers and carries out dissolution experiment; At last, change the stress of rock salt, the pressure of dissolving water, the concentration of dissolving water, the flow velocity of dissolving water and/or the temperature of dissolving water and carry out the rock salt dissolving velocity test, draw test figure.
Beneficial effect of the present invention: the present invention applies axial compression from axially going up to the rock salt test specimen from applying confined pressure to the rock salt test specimen on every side, makes rock salt be in triaxial stress state, reaches the purpose of the actual dissolving of real simulation rock salt environment; The central shaft of rock salt test specimen upwards is provided with the limbers, will dissolve water and flow through from the limbers, carries out solubility test; The confined pressure and the axial compression of rock salt test specimen simultaneously is adjustable, the equal scalable of pressure, concentration, temperature and flow velocity of dissolving water.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done to describe in further detail.
Realize the method for rock salt dissolving characteristic test under triaxial stress condition, at first, choose the rock salt test specimen 1 that rock salt is made into cylindrical-shaped structure, limbers 2 upwards is set at the central shaft of rock salt test specimen 1; Then, from applying confined pressure 3 to rock salt test specimen 1 on every side, and apply axial compression 4 to rock salt test specimen 1, shown in accompanying drawing from axially going up; Again then, will dissolve water 2 flows through and carries out dissolution experiment from the limbers; At last, change the stress of rock salt test specimen 1, the pressure of dissolving water, the concentration of dissolving water, the flow velocity of dissolving water and the temperature of dissolving water and carry out the rock salt dissolving velocity test, draw test figure.
In the method for above-mentioned realization rock salt dissolving characteristic test under triaxial stress condition; The rock salt test specimen also can be made into box structure; On the rock salt test specimen of box structure, the limbers is set vertically, from around apply confined pressure to the rock salt test specimen of box structure, from above-below direction, the rock salt test specimen is applied axial compression; Can realize the object of the invention equally, all should be encompassed in the middle of protection scope of the present invention.
To exerting pressure (confined pressure) around the rock salt test specimen and axial pressure (axial compression) mode can realize through hydraulic pump control, and confined pressure all can be passed through the hydraulic valve adjusting with axial compression; The mode that feeds dissolving water can adopt high-voltage tube to be connected with the inlet seal of limbers 2; The pressure and the flow velocity of dissolving water can be regulated through water pump and water valve in the high-voltage tube; Dissolving water also can be through temperature controller control temperature; The confined pressure and the axial compression of final realization rock salt test specimen are adjustable, and the equal scalable of pressure, concentration, temperature and speed of dissolving water more can the actual purpose of dissolving environment of real simulation rock salt.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1. a method that realizes rock salt dissolving characteristic test under triaxial stress condition is characterized in that: at first, choose the rock salt test specimen that rock salt is made into cylindrical-shaped structure, at rock salt test specimen central shaft the limbers is set upwards; Then, from applying confined pressure to the rock salt test specimen on every side, and apply axial compression to the rock salt test specimen from axially going up; Again then, will dissolve water flows through from the limbers and carries out dissolution experiment; At last, change the stress of rock salt test specimen, the pressure of dissolving water, the concentration of dissolving water, the flow velocity of dissolving water and/or the temperature of dissolving water and carry out the rock salt dissolving velocity test, draw test figure;
To exerting pressure around the rock salt test specimen and the axial pressure mode realizes through hydraulic pump control, and confined pressure and axial compression are all regulated through hydraulic valve; The mode that feeds dissolving water adopts high-voltage tube to be connected with the inlet seal of limbers, and the pressure and the flow velocity of dissolving water are regulated through water pump and water valve in the high-voltage tube, and dissolving water is through temperature controller control temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101439272A CN101819132B (en) | 2010-04-09 | 2010-04-09 | Method for realizing rock salt dissolving characteristic test under triaxial stress condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101439272A CN101819132B (en) | 2010-04-09 | 2010-04-09 | Method for realizing rock salt dissolving characteristic test under triaxial stress condition |
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| Publication Number | Publication Date |
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| CN101819132A CN101819132A (en) | 2010-09-01 |
| CN101819132B true CN101819132B (en) | 2012-05-23 |
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| CN2010101439272A Expired - Fee Related CN101819132B (en) | 2010-04-09 | 2010-04-09 | Method for realizing rock salt dissolving characteristic test under triaxial stress condition |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011579B (en) * | 2010-10-26 | 2013-08-07 | 重庆大学 | Large-size interlayer-containing salt cavity-manufacturing test method |
| CN102661914B (en) * | 2012-05-03 | 2014-06-25 | 中国水电顾问集团华东勘测设计研究院 | High-pressure low-temperature triaxial corrosion experimental device and experimental method thereof |
| CN103163043A (en) * | 2013-03-26 | 2013-06-19 | 中国科学院武汉岩土力学研究所 | Device and method for testing rock salt dissolution rates |
| CN103630670B (en) * | 2013-12-18 | 2015-10-07 | 重庆大学 | A kind of test unit measuring Characteristics of Damaged Rock Salt self-recoverage amount |
| CN106226198A (en) * | 2016-08-19 | 2016-12-14 | 中国石油集团渤海钻探工程有限公司 | Indoor evaluation device for slow-release solid dissolution performance |
| CN108414359A (en) * | 2018-01-15 | 2018-08-17 | 中国矿业大学 | The mechanical property system and method for rock sample containing duct under the conditions of a kind of real time high temperature |
| CN110441185A (en) * | 2019-08-05 | 2019-11-12 | 石家庄铁道大学 | For measuring the test device and test method of rock salt rate of dissolution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3210923B2 (en) * | 1992-02-03 | 2001-09-25 | 株式会社東京ソイルリサーチ | Visualized triaxial piping test apparatus and test method |
| CN1699997A (en) * | 2005-06-16 | 2005-11-23 | 长安大学 | Soil one-dimensional consolidation, penetration and stress looseness comprehensive test apparatus and method of use thereof |
| CN2884197Y (en) * | 2005-11-16 | 2007-03-28 | 中国科学院武汉岩土力学研究所 | Vadose-dissolution coupling test device for rock salt fissure |
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Granted publication date: 20120523 Termination date: 20130409 |