CN109709017A - A kind of rock fracture high pressure gas adsorption tester device and its test method - Google Patents
A kind of rock fracture high pressure gas adsorption tester device and its test method Download PDFInfo
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- CN109709017A CN109709017A CN201910014108.9A CN201910014108A CN109709017A CN 109709017 A CN109709017 A CN 109709017A CN 201910014108 A CN201910014108 A CN 201910014108A CN 109709017 A CN109709017 A CN 109709017A
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Abstract
The invention discloses a kind of rock fracture high pressure gas adsorption tester device and its test methods.It includes pressure-bearing pressure head, carrying limits device, constant temperature system, pressure-bearing pedestal, the fixed cell for fixed test rock sample, buffering gas tank, helium air accumulator, test gas storage tank, oil pump, oil circuit, gas piping, air gauge and gas switch, constant temperature system and fixed cell are set on pressure-bearing pedestal, carrying limits device, fixed cell, buffering gas tank, oil pump, air gauge and enterprising air cock, lower air inlet switch, oil pump is set in constant temperature system to be connected by oil circuit with the unit main body inner cavity of fixed cell；Helium air accumulator, test gas storage tank, helium switch and test air cock are set outside constant temperature system, buffering gas tank passes through helium and test air pipe respectively and is connected with helium air accumulator and test gas storage tank, and helium and test air pipe set helium switch and test air cock respectively.It has the characteristics that structure is simple, easy to assembly and safe and reliable.
Description
Technical field
The present invention relates to a kind of rock fracture high pressure gas adsorption tester device and its test methods.
Background technique
Rock gas High Pressure Absorption phenomenon has a very important significance in numerous areas, such as coal petrography/shale gas
High Pressure Absorption directly decides coal petrography/shale gas reserves size, and then decides the economical of exploitation project, and mud stone/
The gas high pressure adsorption capacity of rock salt is to evaluate rock for the important factor of evaluation of gas tightness and gas sealed vol, in day
It is played an important role in terms of right gas storage and carbon dioxide geologic sequestration.In Chinese invention patent specification CN105043920A
In disclose it is a kind of measurement rock mass thermostatic absorption and monitor strain of rock mass test method and instrument, belong to rock mass constant temperature and rock mass
The test method and instrument of strain.The test method tests the thermostatic absorption ability of rock mass by indirect gravitational method, while can be
Transverse direction and longitudinal strain piece are pasted in institute's sample side, during rock sample reaches adsorption equilibrium while monitoring the strain of rock sample
Situation, convenient for the relationship between the absorption of analysis rock mass and rock mass microstress；Multiple adsorption tanks are added simultaneously to different-grain diameter model
Rock sample in enclosing carries out absorption test, and rock mass sample particle diameter measurement range is wide, and partial size test scope covers 100 μm of -20mm.This survey
Amount rock mass thermostatic absorption and the test method for monitoring strain of rock mass calculate the adsorbance of sample by high accuracy balance weighing, with
It is different that previous volumetric method surveys adsorbance.It can be used for laboratory, the suction that test enterprise and government department determine rock to gas
Attached amount.Test equipment is single, and junction is few, enhances the leakproofness of system, operation is relatively simple, calculation method is simple and reliable,
Accuracy is high.Currently, rock gas High Pressure Absorption uses helium as marked gas mostly using equation for ideal gases as theoretical basis
It is tested, however such test equipment is only for the result of rock high pressure absorption when testing gas with various temperature and gas pressure
It is measured, the variation without being concerned about stress condition of the rock in underground environment, especially rock are in three axis of high stress
Pressure break acts on lower rock crack, communication path expands the influence adsorbed to rock high pressure.
Summary of the invention
For the above-mentioned prior art, the technical problem to be solved in the present invention is that providing a kind of rock fracture high pressure gas suction
Attached test equipment.It has the characteristics that structure is simple, easy to assembly and safe and reliable.Not only can quickly, easily it obtain
Obtain gas high pressure Adsorption law under large-scale rock Centimeter Level test specimen different temperatures and gas pressure, it is most important that can also pass through
Fixed cell confining pressure and lateral pressure change the ambient stress of rock, real simulation rock rock under the effect of artificial pressure break
Gas high pressure Adsorption law has by force to improve gas-field exploitation efficiency rich in gas rock, sealing rock increase gas storage capability and provide
The basic guarantee of power.
In order to solve the above technical problems, the present invention provides a kind of rock fracture high pressure gas adsorption tester devices.It is wrapped
Include pressure-bearing pressure head, carrying limits device, constant temperature system, pressure-bearing pedestal, the fixed cell for fixed test rock sample, buffering
Gas tank, helium air accumulator, test gas storage tank, oil pump, oil circuit, gas piping, air gauge and gas switch, gas switch packet
Enterprising air cock, lower air inlet switch, helium switch and test air cock are included, gas piping includes upper air pipeline, lower inlet duct
Road and helium and test air pipe set constant temperature system and fixed cell on pressure-bearing pedestal, set in constant temperature system carrying limits device,
Fixed cell, buffering gas tank, oil pump, oil circuit, upper air pipeline, lower inlet duct road, air gauge and enterprising air cock, lower INO Intake Open
It closes, fixed cell includes upper cover, unit main body, lower seat and fixing bolt, and unit main body is set on lower seat, is set in unit main body
Lid, lower seat are connected with upper cover by fixing bolt, and test rock sample is set in unit main body, and test rock sample is located at lower seat
On, test rock sample upper end sets carrying limits device, carries and sets pressure-bearing pressure head and upper cover in limits device, buffers gas tank or more
Both ends pass through upper air pipeline respectively and lower inlet duct road is connected with the body lumen for being located at fixed cell, intake pipe road
If the enterprising gentle pressure table of air cock, air inlet switch is set in lower inlet duct road, and oil pump passes through the unit master of oil circuit and fixed cell
Intracoelomic cavity is connected；Helium air accumulator, test gas storage tank, helium switch and test air cock are set outside constant temperature system, are delayed
Qi of chong channel ascending adversely tank passes through helium and test air pipe respectively and is connected with helium air accumulator and test gas storage tank, helium and test gas
Pipeline sets helium switch and test air cock respectively.
The carrying limits device limits the vertical deviation of movable ram for carrying vertical load, including activity pressure
Head, on hold lid, bolt, seal rubber and lower capping, upper Cheng Gai and lower capping are bolted to connection, upper Cheng Gai and lower capping
Between set cavity, set movable ram in cavity, the shape of movable ram be it is cross, movable ram is each passed through Cheng Gai under
Capping, upper Cheng Gai are connected by seal rubber with movable ram respectively with lower capping, and movable ram upper end sets pressure-bearing pressure head, under
End is located on test rock sample.
The two sides up and down of the test rock sample are respectively mounted gas dispersible tablet, in this way, above and below the test rock sample
Two sides install gas dispersible tablet and carry out decentralized processing to gas access path, make gas access path more uniform (such as Fig. 2 institute
Show), it tests above rock sample and sets base lid, test rock sample is located on lower seat by pedestal fixation, and uses rubber sleave
It is sealed with ferrule.
The buffering gas tank is used to provide pressure for porosity test, and buffering gas tank upper end passes through upper air pipeline and fixation
The test rock sample of the unit main body inner cavity of unit is connected, and buffering gas tank lower end passes through in lower inlet duct road and fixed cell
The test rock sample of chamber is connected.
The helium air accumulator, for providing helium for buffering gas tank, the pore volume for rock is calibrated, helium gas storage
Tank is connected by helium and test air pipe with buffering gas tank, and sets helium switch on helium and test air pipe.
The test gas storage tank, for providing test gas for buffering gas tank, test gas storage tank passes through helium
It is connected with test air pipe with buffering gas tank, and sets test air cock on helium and test air pipe.
The air gauge is used to measure the pressure of gas, and air gauge is used to test the gas pressure of buffering gas tank.
The oil pump is used to provide confining pressure for the unit main body inner cavity of fixed cell, oil pressure gauge is set on oil pump, for measuring
The confining pressure of fixed cell unit main body inner cavity.
The gas switch, for controlling flowing of the gas in pipeline, wherein on upper air switch control fixed cell
Air inlet pipeline, lower air inlet switch control fixed cell lower inlet duct road, and helium switch and test air cock control helium storage respectively
Gas tank and test gas storage tank are the gas piping for buffering gas tank injection gas.
The test Rock Sample Size is diameter 50cm, height 100mm.
Compared with prior art, the beneficial effect comprise that: due to the above structure, in use, this hair
It is bright not only can quickly, gas high pressure absorption rule are easily obtained under large-scale rock Centimeter Level test specimen different temperatures and gas pressure
Rule, it is most important that the ambient stress of rock, real simulation rock can also be changed by fixed cell confining pressure and lateral pressure
The gas high pressure Adsorption law of stone rock under the effect of artificial pressure break, to improve gas-field exploitation efficiency, sealing rich in gas rock
Rock increases gas storage capability and provides strong basic guarantee.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is carrying limits device enlarged structure schematic diagram of the invention；
Fig. 3 is that enlarged structure schematic diagram is arranged in present invention test rock sample；
In figure: 1- upper cover, 2- unit main body, 3- test rock sample, 4- fixing bolt, seat under 5-, 6- pedestal,
7- oil circuit, 8- oil pump, 9- constant temperature system, 10- helium and test air pipe, 11- helium switch, 12- tests air cock,
13- tests gas storage tank, 14- helium air accumulator, 15- and buffers gas tank, 16- upper air pipeline, 17- air gauge, 18-
Air inlet switch, 20- lower inlet duct road, 21- pressure-bearing pressure head, 22- carry limits device, 221- under enterprising air cock, 19-
Capping, 23- pressure-bearing pedestal, 24- gas under lid, 223- bolt, 224- seal rubber, 225- are held on movable ram, 222-
Body dispersible tablet, 25- ferrule and 26- rubber sleave.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 to Fig. 3 shows the various structural schematic diagrams of the present invention.As shown in Figure 1 to Figure 3, the present invention provides a kind of rocks
Stone pressure break high pressure gas adsorption tester device.It includes pressure-bearing pressure head 21, carrying limits device 22, constant temperature system 9, pressure-bearing pedestal
23, for the fixed cell of fixed test rock sample 3, buffering gas tank 15, helium air accumulator 14, test gas storage tank 13,
Oil pump 8, oil circuit 7, gas piping, air gauge 17 and gas switch, gas switch include enterprising air cock 18, lower air inlet switch
19, helium switch 11 and test air cock 12, gas piping includes upper air pipeline 16, lower inlet duct road 20 and helium and test
Air pipe 10 sets constant temperature system 9 and fixed cell on pressure-bearing pedestal 23, and carrying limits device 22, fixed single is set in constant temperature system 9
Member, buffering gas tank 15, oil pump 8, oil circuit 7, upper air pipeline 16, lower inlet duct road 20, air gauge 17 and enterprising air cock 18, under
Air inlet switch 19, fixed cell include upper cover 1, unit main body 2, lower seat 5 and fixing bolt 4, and unit main body 2 is set on lower seat 5, single
Upper cover 1 is set in first main body 2, lower seat 5 is connected with upper cover 1 by fixing bolt 4, test rock sample 3 is set in unit main body 2,
Test rock sample 3 is located on lower seat 5, and test 3 upper end of rock sample sets carrying limits device 22, is carried and is set in limits device 22
Pressure-bearing pressure head 21 and upper cover 1, buffering 15 upper and lower ends of gas tank pass through upper air pipeline 16 and lower inlet duct road 20 respectively and are located at
The body lumen of fixed cell is connected, and enterprising air cock 18 and air gauge 17 is set on upper air pipeline 16, and part pipeline is set
In the movable ram 221 of carrying limits device 22, air inlet switch 19 is set on lower inlet duct road 20, and part pipeline is located at admittedly
In the lower seat 5 and pedestal 6 of order member, oil pump 8 is connected by oil circuit 7 with 2 inner cavity of unit main body of fixed cell, flow paths
7 are located in lower seat 5 and pedestal 6；Helium air accumulator 14, test gas storage tank 13,11 and of helium switch are set outside constant temperature system 9
Air cock 12 is tested, buffering gas tank 15 passes through helium and test air pipe 10 and helium air accumulator 14 and test gas gas storage respectively
Tank 13 is connected, and helium and test air pipe 10 set helium switch 11 and test air cock 12 respectively.The carrying limits device
22 include movable ram 221, on hold lid 222, bolt 223, seal rubber 224 and it is lower capping 225, above hold lid 222 and lower capping
225 are fixedly connected by bolt 223, are above held and are set cavity between lid 222 and lower capping 225, movable ram 221 is set in cavity, living
The shape of dynamic head 221 be it is cross, movable ram 221 be each passed through holds lid 222 and it is lower capping 225, above hold lid 222 and under
Capping 225 is connected with movable ram 221 by seal rubber 224 respectively, i.e., on hold lid 222 and it is lower cover 225 respectively with work
Seal rubber 224 is set between dynamic head 221,221 upper end of movable ram sets pressure-bearing pressure head 21, and lower end is located at test rock sample 3
On, carrying limits device 22 limits the vertical deviation of movable ram 221 for carrying vertical load.The test rock examination
The two sides up and down of part 3 are respectively mounted gas dispersible tablet 24, and the gas dispersible tablet 24 is exactly that gas is allowed to disperse, then equably from survey
The whole surface infiltration of rock sample 3 is tried, rather than is permeated from that point of tracheae.In this way, about the 3 test rock sample
Two sides install gas dispersible tablet 24 and carry out decentralized processing to gas access path, make gas access path more uniform (such as Fig. 3 institute
Show), test rock sample 3 sets base lid above, and test rock sample 3 is located on lower seat 5 by the fixation of pedestal 6, and uses rubber
Leather sheath 26 and ferrule 25 are sealed.The buffering gas tank 15 is used to provide pressure for porosity test, buffers gas tank 15
Upper end is connected by upper air pipeline 16 with the test rock sample 3 of 2 inner cavity of unit main body of fixed cell, and gas tank 15 is buffered
Lower end is connected by lower inlet duct road 20 with the test rock sample 3 of fixed cell inner cavity.The helium air accumulator 14, is used for
Helium is provided for buffering gas tank 15, the pore volume for rock is calibrated, and helium air accumulator 14 passes through helium and test air pipe
10 are connected with buffering gas tank 15, and set helium switch 11 on helium and test air pipe 10.The test gas storage tank
13, for providing test gas for buffering gas tank 15, test gas storage tank 13 passes through helium and test air pipe 10 and buffering
Gas tank 15 is connected, and sets test air cock 12 on helium and test air pipe 10.The air gauge 17 is for measuring gas
Pressure, air gauge 17 be used for test buffer gas tank 15 gas pressure.The unit main body that the oil pump 8 is used for as fixed cell
2 inner cavities provide confining pressure, oil pressure gauge are set on oil pump 8, for measuring the confining pressure of 2 inner cavity of fixed cell unit main body.The gas is opened
Close, for controlling flowing of the gas in pipeline, wherein enterprising air cock 18 controls fixed cell upper air pipeline 16, under into
Air cock 19 controls fixed cell lower inlet duct road 20, and helium switch 11 and test air cock 12 control helium air accumulator 14 respectively
It is the gas piping for buffering gas tank 15 and injecting gas with test gas storage tank 13.The test rock sample 3 is having a size of diameter
50cm, height 100mm.The constant temperature system 9 is used for fixed cell, buffering gas tank 15, oil pump 8 and pipeline (oil circuit and gas
Pipeline) steady temperature is provided, range of temperature is ± 0.1 DEG C.The pressure-bearing pedestal 23 and pressure-bearing pressure head 21, for being placed in
On press machine and carry the vertical load that press machine is applied on fixed cell.
The present invention not only can quickly, gas under large-scale rock Centimeter Level test specimen different temperatures and gas pressure is easily obtained
Body High Pressure Absorption rule, it is most important that the NOL ring of rock can also be changed by fixed cell confining pressure and lateral pressure
Border, the gas high pressure Adsorption law of real simulation rock rock under the effect of artificial pressure break, to improve gas rich in gas rock
Production efficiency, sealing rock increase gas storage capability and provide strong basic guarantee.Test philosophy of the invention is perfect gas
Equation:
PV=nRT
Wherein, P is the pressure of perfect gas, and unit is usually atm or kPa；V is the volume of perfect gas, unit L；n
For the amount of gaseous matter in perfect gas, unit mol；R is ideal gas constant, 8.314J/molK；T is perfect gas
Absolute temperature, unit K.Rock pore is calculated using the variation of gas pressure as calibration gas first with helium atmosphere
Then gap volume is full of volume using test gas, comparing helium test volume spare volume gas molecule is binding molecule
Amount, then gradually applies vertical load, and is recorded in fixed load and acts on lower gas pressure change, and then pass through perfect gas side
Journey calculates the variation of binding molecule amount.Lower air inlet switch 19, helium switch 11, test air cock 12 and 18 groups of enterprising air cock
At closure pipeline in all volumes, wherein containing the volume of buffering gas tank 15 and being attached thereto the volume of pipeline,
It is V by standard test1.Rock sample 3 is tested having a size of diameter 50cm, height 100mm.
A kind of test method of rock fracture high pressure gas adsorption tester device, a certain fixed temperature T1With gas pressure intensity P4
Under, the testing procedure using rock fracture high pressure gas adsorption tester device test rock sample porosity is as follows:
(1) using diameter D, the height H of vernier caliper test rock sample 3, and the volume V of test specimen is calculatedS:
(2) fixed cell, connection gas piping are installed as shown in Figure 1, installation test 3 same volume cylindrical steel of rock sample
Test specimen processed, and determine that all switches are closed, it opens constant temperature system 9 and fixed temperature T is set1。
(3) 8 valve of hand oil pump is opened, provides confining pressure Pv to 2 inner cavity of unit main body of fixed cell.
(4) it opens helium switch 11 and is filled with helium atmosphere to buffering gas tank 15 and pressure is provided and (be less than PV)；Close helium
Switch 11, after gas pressure is stablized, the reading of record air gauge 17 is pressure P1；
(5) lower air inlet switch 19 and enterprising air cock 18 are opened, after stable gas pressure, the reading of record air gauge 17 is shown
For pressure P2；According to equation for ideal gases, lower 18 sealing gas of air inlet switch 19 and enterprising air cock is calculated according to following formula
Pipeline, the isometric V of gas dispersible tablet 242Are as follows:
(6) lower air inlet switch 19 is closed, closes and removes manual oil pump 8, disassemble fixed cell, takes out cylindrical steel examination
Part, and test rock sample 3 is installed in fixed cell, and connecting line (gas piping and oil circuit 7) is as shown in Figure 1.
(7) hand oil pump 8 is installed and opened, provides confining pressure oil to the unit main body 2 of fixed cell, and apply confining pressure
Pv。
(8) it opens helium switch 11 and provides pressure (less than P to buffering gas tank 15V), helium switch 11 is closed, to gas pressure
After power is stablized, the reading of record air gauge 17 is pressure P1；
(9) lower air inlet switch 19 and enterprising air cock 18 are opened, after 6h, the reading of record air gauge 17 is shown as pressure
P3, the pore volume V of test rock sample 3 is calculated according to following formula according to equation for ideal gases3Are as follows:
(10) close and remove lower air inlet switch 19 and enterprising air cock 18, release buffering gas tank 15 and connected gas piping
In helium atmosphere reconnect lower air inlet switch 19 and enterprising air cock 18 after 4h.
(11) it opens test air cock 12 and is filled with test gas to buffering gas tank 15 and pressure is provided and (be less than PV)；It closes
Helium switch 11, after gas pressure is stablized, the reading of record air gauge 17 is pressure P1；
(12) lower air inlet switch 19 and enterprising air cock 18 are opened, after 6h, the reading of record air gauge 17 is shown as pressing
Strong P4, the pore volume V of test rock sample 3 is calculated according to following formula according to equation for ideal gases4Are as follows:
(13) test gas is in temperature T1, confining pressure pressure Pv and gas pressure intensity P4Under, test 3 unit volume of rock sample
Adsorbance n1Are as follows:
(14) apply xial feed step by step by load step until rock fracture destroys, and records xial feed PnLower air pressure
The reading of table 17 shows that pressure is P5, the pore-body of test rock sample 3 is calculated according to following formula according to equation for ideal gases
Product V5Are as follows:
(15) xial feed acts on lower PnUnder, test the adsorbance n of 3 unit volume of rock sample2Are as follows:
Therefore rock is being n by the monomer volume absorption reduction amount under pressure break state1-n2, may determine that rock fracture pair thus
In the influence of high pressure gas absorption.
The rock fracture high pressure gas adsorption tester device and its test method are by being theoretical base with equation for ideal gases
Plinth uses helium to be tested as marked gas, can be used for laboratory, test enterprise and government department and determines rock to gas
Adsorbance.Test equipment is single, and junction is few, enhances the leakproofness of system, operates relatively simple, calculation method and simply may be used
It leans on, accuracy height.
Above in conjunction with attached drawing, the embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned
Embodiment can also make many variations to it within the knowledge of a person skilled in the art.
Claims (10)
1. a kind of rock fracture high pressure gas adsorption tester device, it includes pressure-bearing pressure head (21), carrying limits device (22), perseverance
Warm system (9), pressure-bearing pedestal (23), the fixed cell for fixed test rock sample (3), buffering gas tank (15), helium storage
Gas tank (14), test gas storage tank (13), oil pump (8), oil circuit (7), gas piping, air gauge (17) and gas switch, gas
Body switch includes enterprising air cock (18), lower air inlet switch (19), helium switch (11) and test air cock (12), gas piping
Including upper air pipeline (16), lower inlet duct road (20) and helium and test air pipe (10), it is characterised in that: pressure-bearing pedestal
(23) constant temperature system (9) and fixed cell are set on, and carrying limits device (22), fixed cell, buffering gas are set in constant temperature system (9)
Tank (15), oil pump (8), oil circuit (7), upper air pipeline (16), lower inlet duct road (20), air gauge (17) and enterprising air cock
(18), lower air inlet switch (19), fixed cell include upper cover (1), unit main body (2), lower seat (5) and fixing bolt (4), lower seat
(5) it sets unit main body (2), is set in unit main body (2) upper cover (1) on, lower seat (5) is connected with upper cover (1) by fixing bolt (4)
It connects, test rock sample (3) is set in unit main body (2), test rock sample (3) is located on lower seat (5), tests rock sample
(3) upper end sets carrying limits device (22), and pressure-bearing pressure head (21) and upper cover (1) are set in carrying limits device (22), buffers gas tank
(15) upper and lower ends pass through upper air pipeline (16) and lower inlet duct road (20) and the body lumen phase that is located at fixed cell respectively
It connects, sets enterprising air cock (18) and air gauge (17) on upper air pipeline (16), INO Intake Open is set on (20) in lower inlet duct road
It closes (19), oil pump (8) is connected by oil circuit (7) with unit main body (2) inner cavity of fixed cell；It is set outside constant temperature system (9)
Helium air accumulator (14), test gas storage tank (13), helium switch (11) and test air cock (12), buffering gas tank (15) point
Helium and test air pipe (10) and helium air accumulator (14) and gas storage tank (13) Tong Guo not be tested it is connected, helium and survey
Gas testing pipeline (10) sets helium switch (11) and test air cock (12) respectively.
2. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the carrying limitation dress
(22) are set for carrying vertical load, and limit the vertical deviation of movable ram (221), including movable ram (221), on hold lid
(222), bolt (223), seal rubber (224) and lower capping (225), above hold lid (222) and lower capping (225) passes through bolt
(223) it is fixedly connected, above holds and set cavity between lid (222) and lower capping (225), set in cavity movable ram (221), activity pressure
Head (221) shape be it is cross, movable ram (221), which is each passed through, holds lid (222) and lower capping (225), above holds lid
(222) it is connected respectively by seal rubber (224) with movable ram (221) with lower capping (225), on movable ram (221)
End is set pressure-bearing pressure head (21), and lower end is located in test rock sample (3).
3. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the test rock examination
The two sides up and down of part (3) are respectively mounted gas dispersible tablet (24), and test rock sample (3) sets base lid above, are tested rock sample (3)
It is located on lower seat (5) by pedestal (6) fixation, and is sealed using rubber sleave (26) and ferrule (25).
4. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the buffering gas tank
(15) for providing pressure for porosity test, buffering gas tank (15) upper end passes through the list of upper air pipeline (16) and fixed cell
The test rock sample (3) of first main body (2) inner cavity is connected, and buffering gas tank (15) lower end passes through lower inlet duct road (20) and fixed
The test rock sample (3) of unit inner cavity is connected.
5. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the helium air accumulator
(14), for providing helium for buffering gas tank (15), the pore volume for rock is calibrated, and helium air accumulator (14) passes through helium
It is connected with test air pipe (10) with buffering gas tank (15), and sets helium switch on helium and test air pipe (10)
(11)。
6. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the test gas storage
Gas tank (13), for providing test gas for buffering gas tank (15), test gas storage tank (13) passes through helium and test tracheae
Road (10) is connected with buffering gas tank (15), and sets test air cock (12) on helium and test air pipe (10).
7. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the gas switch,
For controlling flowing of the gas in pipeline, wherein enterprising air cock (18) controls fixed cell upper air pipeline (16), under into
Air cock (19) controls fixed cell lower inlet duct road (20), and helium switch (11) and test air cock (12) control helium respectively
Air accumulator (14) and test gas storage tank (13) are the gas piping for buffering gas tank (15) injection gas.
8. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the test rock examination
Part (3) is having a size of diameter 50cm, height 100mm.
9. rock fracture high pressure gas adsorption tester device as described in claim 1, it is characterised in that: the constant temperature system
(9) for providing steady temperature to fixed cell, buffering gas tank (15), oil pump (8) and pipeline, range of temperature is ± 0.1
℃。
10. a kind of test method of rock fracture high pressure gas adsorption tester device, it is characterised in that: a certain fixed temperature T1With
Gas pressure intensity P4Under, the testing procedure of rock sample porosity is tested such as using the rock fracture high pressure gas adsorption tester device
Under:
(1) using diameter D, the height H of vernier caliper test rock sample (3), and the volume V of test specimen is calculatedS:
(2) fixed cell, connection gas piping are installed, rock sample (3) same volume cylinder steel test specimen is tested in installation, and really
Fixed all switches are closed, and open constant temperature system (9) and fixed temperature T is arranged1。
(3) hand oil pump (8) valve is opened, provides confining pressure Pv to unit main body (2) inner cavity of fixed cell.
(4) helium switch (11) is opened to be filled with helium atmosphere to buffering gas tank 15 and pressure is provided；Helium switch (11) is closed, to
After gas pressure is stablized, the reading of record air gauge (17) is pressure P1；
(5) lower air inlet switch (19) and enterprising air cock (18) are opened, after stable gas pressure, the reading of record air gauge (17) is aobvious
It is shown as pressure P2；According to equation for ideal gases, lower air inlet switch (19) are calculated according to following formula and enterprising air cock (18) is close
Seal gas piping, gas dispersible tablet (24) isometric V2Are as follows:
(6) lower air inlet switch (19) are closed, closes and removes manual oil pump (8), disassemble fixed cell, take out cylindrical steel examination
Part, and test rock sample (3) is installed in fixed cell, and connect gas piping and oil circuit (7).
(7) it installs and opens hand oil pump (8), provide confining pressure oil to the unit main body (2) of fixed cell, and apply confining pressure
Pv。
(8) it opens helium switch (11) and provides pressure to buffering gas tank (15), close helium switch (11), stablize to gas pressure
Afterwards, the reading for recording air gauge (17) is pressure P1；
(9) lower air inlet switch (19) and enterprising air cock (18) are opened, after 6h, the reading of record air gauge (17) is shown as pressing
Strong P3, the pore volume V of test rock sample (3) is calculated according to following formula according to equation for ideal gases3Are as follows:
(10) close and remove lower air inlet switch (19) and enterprising air cock (18), release buffering gas tank (15) and connected flue
Helium atmosphere in road reconnects lower air inlet switch (19) and enterprising air cock (18) after 4h.
(11) test air cock (12) is opened to be filled with test gas to buffering gas tank (15) and pressure is provided；Close helium switch
(11), after gas pressure is stablized, the reading of record air gauge (17) is pressure P1；
(12) lower air inlet switch (19) and enterprising air cock (18) are opened, after 6h, the reading of record air gauge (17) is shown as
Pressure P4, the pore volume V of test rock sample (3) is calculated according to following formula according to equation for ideal gases4Are as follows:
(13) test gas is in temperature T1, confining pressure pressure Pv and gas pressure intensity P4Under, test the suction of rock sample (3) unit volume
Attached amount n1Are as follows:
(14) apply xial feed step by step by load step until rock fracture destroys, and records xial feed PnLower air gauge
(17) reading shows that pressure is P5, the hole of test rock sample (3) is calculated according to following formula according to equation for ideal gases
Volume V5Are as follows:
(15) xial feed acts on lower PnUnder, test the adsorbance n of rock sample (3) unit volume2Are as follows:
Therefore rock is being n by the monomer volume absorption reduction amount under pressure break state1-n2, may determine that rock fracture for height thus
Press the influence of gas absorption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959578A (en) * | 2019-01-08 | 2019-07-02 | 江苏城工建设科技有限公司 | A kind of test equipment and its test method for rock gas High Pressure Absorption |
| CN110987759A (en) * | 2019-12-11 | 2020-04-10 | 东南大学 | Device and method for testing porosity of porous material by using gas |
| CN111122417A (en) * | 2020-02-22 | 2020-05-08 | 太原理工大学 | Device and method for measuring total volume expansion rate of open-close hole of coal containing gas |
| CN111610131A (en) * | 2020-06-01 | 2020-09-01 | 浙江大学 | Soil porosity nondestructive testing device and method thereof |
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2019
- 2019-01-08 CN CN201910014108.9A patent/CN109709017A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959578A (en) * | 2019-01-08 | 2019-07-02 | 江苏城工建设科技有限公司 | A kind of test equipment and its test method for rock gas High Pressure Absorption |
| CN109959578B (en) * | 2019-01-08 | 2024-04-30 | 江苏城工建设科技有限公司 | Testing instrument for rock gas high-pressure adsorption and testing method thereof |
| CN110987759A (en) * | 2019-12-11 | 2020-04-10 | 东南大学 | Device and method for testing porosity of porous material by using gas |
| CN111122417A (en) * | 2020-02-22 | 2020-05-08 | 太原理工大学 | Device and method for measuring total volume expansion rate of open-close hole of coal containing gas |
| CN111122417B (en) * | 2020-02-22 | 2022-06-21 | 太原理工大学 | Device and method for measuring total volume expansion rate of open-close hole of coal containing gas |
| CN111610131A (en) * | 2020-06-01 | 2020-09-01 | 浙江大学 | Soil porosity nondestructive testing device and method thereof |
| CN111610131B (en) * | 2020-06-01 | 2021-04-13 | 浙江大学 | Soil porosity nondestructive testing device and method thereof |
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Application publication date: 20190503 |