CN106769767A - The measurement apparatus and method of a kind of anisotropic rock permeability and elastic modelling quantity - Google Patents
The measurement apparatus and method of a kind of anisotropic rock permeability and elastic modelling quantity Download PDFInfo
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- CN106769767A CN106769767A CN201611217456.9A CN201611217456A CN106769767A CN 106769767 A CN106769767 A CN 106769767A CN 201611217456 A CN201611217456 A CN 201611217456A CN 106769767 A CN106769767 A CN 106769767A
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- Prior art keywords
- rock
- permeability
- core
- measurement
- elastic modelling
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- 239000011435 rock Substances 0.000 title claims abstract description 126
- 230000035699 permeability Effects 0.000 title claims abstract description 67
- 239000007789 gases Substances 0.000 claims abstract description 47
- 239000003570 air Substances 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000011888 foils Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 20
- 239000007788 liquids Substances 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 10
- 229920001169 thermoplastics Polymers 0.000 claims description 9
- 239000004416 thermosoftening plastic Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injections Substances 0.000 claims description 5
- 238000000034 methods Methods 0.000 claims description 4
- 239000011148 porous materials Substances 0.000 claims description 4
- 230000000875 corresponding Effects 0.000 claims description 3
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 239000001308 nitrogen Substances 0.000 claims description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- MYUWJNMDOHTIQI-UHFFFAOYSA-N C12(C(C1N2C)C)C(C)C Chemical compound C12(C(C1N2C)C)C(C)C MYUWJNMDOHTIQI-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
Abstract
Description
Technical field
The present invention relates to a kind of Rock Mechanics Test device and method, more particularly to a kind of anisotropic rock permeability and The measurement apparatus and method of elastic modelling quantity.
Background technology
With the exploitation of unconventional petroleum resources, the exploitation of shale gas and coal bed gas receives much concern.However, due to receiving To the influence of depositional environment, shale and coal petrography have obvious depositional bedding, compared with homogeneous rock, its permeability and springform Scale reveals obvious anisotropy so that the pressing crack construction and effect assessment of shale and coal petrography reservoir are more complicated.Therefore, it is accurate The permeability and elastic modelling quantity of true measurement anisotropic rock have important engineering significance.
At present, the measurement of rock permeability and elastic modelling quantity is mainly for homogeneous rock, it is impossible to preferably embody rock Anisotropy, the invention of such as patent of invention of Application No. 201310745508.X and Application No. 201110368838.2 is special Profit, can only obtain the permeability of rock, and can not obtain the same step number of rock permeability and stress-strain during triaxial compressions According to；The patent of invention of Application No. 201310733764.7, can only obtain the permeability and stress-strain data of unsaturated soil, The permeability and elastic modelling quantity data of anisotropic rock different directions can not be obtained.
The content of the invention
A kind of drawbacks described above that the purpose of the present invention exists aiming at prior art, there is provided anisotropic rock permeability With the measurement apparatus and method of elastic modelling quantity, under different pressures and temperature conditionss, triaxial compressions are carried out to anisotropic rock Experiment, obtains the permeability and the synchrodata of stress-strain of core sample during triaxial compressions；By rubber nested structure, The placement of cube rock core on three directions is realized, the permeability and springform of same anisotropic rock different directions is obtained Amount data.
A kind of anisotropic rock permeability and the measurement apparatus of elastic modelling quantity that the present invention is mentioned, including triaxial stress kettle （1）, base（16）, piston rod（9）, rubber sleeve（14）, foil gauge（15）, electromagnetic heating coil（3）, permeability survey instrument（18）With Gas cylinder（20）, the piston rod（9）Installed in triaxial stress kettle（1）Upper end, can be used for rock core（13）Apply pressure；The bottom Seat（16）Installed in triaxial stress kettle（1）Lower end, the rock core（13）It is placed on rubber sleeve（14）It is interior, and piston is placed on together Bar（9）And base（14）Between, use thermoplastic tube（4）Sealing；The liquid pores（6）It is placed in triaxial pressure kettle（1）Lower sidewall, For to kettle chamber（2）Inside injection, discharging liquid, realize to rock core（13）Plus unloading confined pressure；The gas orifice（12）It is arranged on Triaxial stress kettle（1）Side wall upper part, realizes kettle chamber（2）Internal ventilation；The electromagnetic heating coil（3）Installed in triaxial stress kettle （1）Outer wall, for giving kettle chamber（2）Heating；The inlet channel（10）It is arranged on piston rod（9）Inside, by air hose （11）With permeability survey instrument（18）Connection, and by air drain II（26）Realize rock core（13）The supply of upper end gas；The row Gas passage（17）It is arranged on base（16）Inside, and atmosphere, and by air drain I（25）, realize rock core（13）Lower end gas Discharge；The gas cylinder（20）, by pressure-reducing valve（19）With permeability survey instrument（18）Connection, realizes the supply of gas；It is described Foil gauge（15）It is pasted onto rock core（13）Four different azimuths of adjacent face, by data wire（21）, wire casing（24）With calculating Machine（22）Connection, realizes rock core（13）The reading of strain data.
Above-mentioned rubber tube（14）For columnar structured, center is provided with the cavity of square structure, can place vertical in cavity The rock core of cube shape（13）, realize the measurement of anisotropy core permeability and elastic modelling quantity.
Above-mentioned air drain II（26）With air drain I（25）It is the annular groove of square structure, it is possible to achieve rock core（13）Three axles In compression process, the synchro measure of permeability and stress-strain data.
Above-mentioned piston rod（9）With triaxial stress kettle（1）Between use sealing ring II（8）Sealing.
Above-mentioned base（16）With triaxial stress kettle（1）Between use sealing ring I（7）Sealing.
Above-mentioned data wire（21）Use sealing-plug（5）Sealing.
A kind of anisotropic rock permeability and the application method of the measurement apparatus of elastic modelling quantity that the present invention is mentioned, including Following steps：
（1）, prepare the core sample of cube structure, be placed on rubber sleeve inside configuration, and be placed on piston rod and bottom together Between seat, the thermoplastic seal of tube is used, for injection, discharging liquid inside kettle chamber, realization to add unloading confined pressure to rock core；
（2）, the measurement apparatus elastic stage compression experiment that carries out under different pressures and temperature conditionss, obtain same anisotropy rock The permeability and elastic modelling quantity data of stone different directions；
（3）, the measurement apparatus triaxial compression test that carries out under different pressures and temperature conditionss, during obtaining triaxial compressions The permeability of core sample and the synchrodata of stress-strain.
A kind of anisotropic rock permeability and the application method of the measurement apparatus of elastic modelling quantity that the present invention is mentioned, including Comprise the following steps that：
（1）The core sample that anisotropic rock processes cube form is chosen, in four of sample adjacent face not Tongfangs To stickup foil gauge, and it is placed on inside the rubber sleeve according to a direction；
（2）The rubber sleeve of core sample will be placed with to be placed between the piston rod and base, and carried out sealing solid with thermoplastic tube It is fixed；
（3）To injecting liquid in the kettle chamber, confined pressure is applied to rock sample, after reaching preset value, closing liquid hole and gas Hole, is then heated by electromagnetic heating coil to kettle chamber；
（4）Axial load is applied to core sample using piston rod, the elastic stage pressure under different pressures and temperature conditionss is carried out Contracting experiment, under the conditions of rock core is unbroken, obtains core sample rock core top in this direction and bottom gas pressure is gentle Body flow, and stress-strain value；
（5）Above-mentioned rock core top and bottom gas pressure and gas flow are substituted into rock perm-plug method computing formula, is obtained The permeability of rock sample in this direction：
（1）
In formula,It is the permeability of rock sample, μm2=D；It is atmospheric pressure, MPa；It is the absolute pressure at rock core top end Power, MPa；It is the absolute pressure of rock core bottom, MPa；It is gas flow nitrogen flow, cm3/s；It is gas viscosity, mPa.s；It is the cross-sectional area of rock core, cm2；It is the length of rock core, cm；
（6）Above-mentioned stress-strain value is substituted into elastic modulus of rock computing formula, the springform of core sample in this direction is obtained Amount：
（2）
In formula,It is the elastic modelling quantity of rock core, GPa；It is the stress difference of rock core elastic deformation stage, MPa；To answer Be deteriorated corresponding strain difference, %；
（7）By changing placement direction of the core sample in the rubber sleeve inside configuration, repeat the above steps（2）Arrive（6）, obtain To the permeability and elastic modelling quantity of three different directions of same anisotropic rock；
（8）The measurement apparatus carry out the complete triaxial compression test under different pressures and temperature conditionss, obtain triaxial compressions During core sample permeability and the synchrodata of stress-strain.
The beneficial effects of the invention are as follows：（1）Measurement apparatus of the present invention are rational in infrastructure, simple to operate, can measure not With the permeability and elastic modelling quantity of anisotropic rock under triaxial stress and temperature conditionss, original crustal stress shape is preferably simulated State；（2）Measurement apparatus of the present invention can obtain the synchronization of the permeability and stress-strain of core sample during triaxial compressions Data；（3）Measurement apparatus of the present invention can obtain the permeability and springform on three directions of same anisotropic rock Amount, its measuring method reliability can preferably react the anisotropy of rock.
Brief description of the drawings
Fig. 1 is measurement apparatus structural representation of the invention；
Fig. 2 is rubber sleeve section of structure of the invention；
Fig. 3 is rubber sleeve structural perspective of the invention；
Fig. 4 is the core sample stereogram of anisotropic rock of the invention；
Fig. 5 is base apex structure schematic diagram of the invention；
Fig. 6 is piston rod bottom of the invention structural representation；
In figure, 1, triaxial pressure kettle, 2, kettle chamber, 3, electromagnetic heating coil, 4, thermoplastic tube, 5, sealing-plug, 6, liquid pores, 7, sealing ring I, 8, sealing ring II, 9, piston rod, 10, inlet channel, 11, air hose, 12, gas orifice, 13, core sample, 14, rubber Set, 15, foil gauge, 16, base, 17, exhaust passage, 18, permeability survey instrument, 19, pressure-reducing valve, 20, gas cylinder, 21, data wire, 22nd, computer, 23, screw, 24, wire casing, 25, air drain I, 26, air drain II.
Specific embodiment
As shown in figure 1, the measurement apparatus of a kind of anisotropic rock permeability of the invention and elastic modelling quantity, including：Three Axle autoclave pressure 1, base 16, piston rod 9, rubber sleeve 14, foil gauge 15, electromagnetic heating coil 3, permeability survey instrument 18, gas cylinder 20.
The piston rod 9 is arranged on the upper end of triaxial stress kettle 1, is sealed with sealing ring II 8, can be used to apply to press to rock core 13 Power；The base 16 is arranged on the lower end of triaxial stress kettle 1, is sealed with sealing ring I 7, and fixed by screw 23；The rock core 13 It is placed in rubber sleeve 14, and is placed on together between piston rod 9 and base 14, is sealed with thermoplastic tube 4；The liquid pores 6 are pacified Put in the lower sidewall of triaxial pressure kettle 1, for injection, discharging liquid inside kettle chamber 2, realizing to rock core 13 plus unloading confined pressure； The gas orifice 12 is arranged on the side wall upper part of triaxial stress kettle 1, realizes the ventilation inside kettle chamber 2；The electromagnetic heating coil 3 is installed In the outer wall of triaxial stress kettle 1, for being heated to kettle chamber 2；The inlet channel 10, is arranged on inside piston rod 9, soft by gas transmission Pipe 11 is connected with permeability survey instrument 18, and by air drain II 26, realizes the supply of the upper end gas of rock core 13；The exhaust passage 17, it is arranged on inside base 16, and atmosphere, and by air drain I 25, realize the discharge of the lower end gas of rock core 13；The gas Bottle 20, is connected by pressure-reducing valve 19 with permeability survey instrument 18, realizes the supply of gas；The foil gauge 15 is pasted onto rock core 13 Four different azimuths of adjacent face, its data wire 21 is sealed with sealing-plug 5, is connected with computer 22 by wire casing 24, is realized The reading of the strain data of rock core 13.
As shown in Figure 2,3, 4, rubber nested structure of the invention and cube rock core, realize cube rock core on three directions Placement.
As shown in figure 5, base device of the invention, including：Base 16, exhaust passage 17, screw 23, wire casing 24, air drain 25。
Base 16 is fixed on the bottom of triaxial pressure kettle 1 by the screw 23；The exhaust passage 17, is arranged in base 16 Portion, and atmosphere, and by air drain I 25, realize the discharge of the lower end gas of rock core 13；The data wire 21 is close with sealing-plug 5 Envelope, is connected by wire casing 24 with computer 22.
As shown in fig. 6, piston lever arrangement of the invention, including：Piston rod 9, inlet channel 10, air drain 26.
The piston rod 9 is arranged on the upper end of triaxial stress kettle 1, is sealed with sealing ring II 8, can be used to apply to press to rock core 13 Power；The inlet channel 10, is arranged on inside piston rod 9, is connected with permeability survey instrument 18 by air hose 11, and pass through Air drain II 26, realizes the supply of the upper end gas of rock core 13.
A kind of anisotropic rock permeability and the application method of the measurement apparatus of elastic modelling quantity that the present invention is mentioned, including Following steps：
（1）The cube core sample that anisotropic rock is processed into 30mm is chosen, the rubber is placed on according to a direction Inside nested structure；
（2）The measurement apparatus carry out the elastic stage compression experiment under different pressures and temperature conditionss, unbroken in rock core Under the conditions of, obtain the permeability and elastic modelling quantity data of the core sample direction；
（3）By changing placement direction of the core sample in the rubber sleeve inside configuration, repeat the above steps（2）, obtain same The permeability and elastic modelling quantity data of one piece of anisotropic rock, three different directions；
（4）The measurement apparatus carry out the triaxial compression test under different pressures and temperature conditionss, during acquisition triaxial compressions The permeability of core sample and the synchrodata of stress-strain.
A kind of anisotropic rock permeability and the application method of the measurement apparatus of elastic modelling quantity that the present invention is mentioned, including Step in detail below：
（1）The core sample that anisotropic rock processes cube form is chosen, in four of sample adjacent face not Tongfangs To stickup foil gauge, and it is placed on inside the rubber sleeve according to a direction；
（2）The rubber sleeve of core sample will be placed with to be placed between the piston rod and base, and carried out sealing solid with thermoplastic tube It is fixed；
（3）To injecting liquid in the kettle chamber, confined pressure is applied to rock sample, after reaching preset value, closing liquid hole and gas Hole, is then heated by electromagnetic heating coil to kettle chamber；
（4）Axial load is applied to core sample using piston rod, the elastic stage pressure under different pressures and temperature conditionss is carried out Contracting experiment, under the conditions of rock core is unbroken, obtains core sample rock core top in this direction and bottom gas pressure is gentle Body flow, and stress-strain value；
（5）Above-mentioned rock core top and bottom gas pressure and gas flow are substituted into rock perm-plug method computing formula, is obtained The permeability of rock sample in this direction：
（1）
In formula,It is the permeability of rock sample, μm2=D；It is atmospheric pressure, MPa；It is the absolute pressure at rock core top end Power, MPa；It is the absolute pressure of rock core bottom, MPa；It is gas flow nitrogen flow, cm3/s；It is gas viscosity, mPa.s；It is the cross-sectional area of rock core, cm2；It is the length of rock core, cm；
（6）Above-mentioned stress-strain value is substituted into elastic modulus of rock computing formula, the springform of core sample in this direction is obtained Amount：
（2）
In formula,It is the elastic modelling quantity of rock core, GPa；It is the stress difference of rock core elastic deformation stage, MPa；To answer Be deteriorated corresponding strain difference, %；
（7）By changing placement direction of the core sample in the rubber sleeve inside configuration, repeat the above steps（2）Arrive（6）, obtain To the permeability and elastic modelling quantity of three different directions of same anisotropic rock；
（8）The measurement apparatus carry out the complete triaxial compression test under different pressures and temperature conditionss, obtain triaxial compressions During core sample permeability and the synchrodata of stress-strain.
The above, is only part preferred embodiment of the invention, and any those of ordinary skill in the art may profit Equivalent technical scheme is changed or is revised as with the technical scheme of above-mentioned elaboration.Therefore, according to technology of the invention Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (8)
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| CN201611217456.9A CN106769767B (en) | 2016-12-26 | 2016-12-26 | The measuring device and method of a kind of anisotropic rock permeability and elasticity modulus |
| CN201810702709.4A CN108896381A (en) | 2016-12-26 | 2016-12-26 | A kind of Rock Mechanics Test device |
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| CN106769767B (en) | 2018-07-03 |
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