CN106840991B - A kind of Unconventional gas rock-more PROCESS COUPLING pilot systems of gas-heat - Google Patents
A kind of Unconventional gas rock-more PROCESS COUPLING pilot systems of gas-heat Download PDFInfo
- Publication number
- CN106840991B CN106840991B CN201611115250.5A CN201611115250A CN106840991B CN 106840991 B CN106840991 B CN 106840991B CN 201611115250 A CN201611115250 A CN 201611115250A CN 106840991 B CN106840991 B CN 106840991B
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- Prior art keywords
- valve
- pneumatic operated
- pressure
- gas
- way
- Prior art date
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- 239000007789 gases Substances 0.000 title claims abstract description 111
- 238000000034 methods Methods 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 title claims abstract description 11
- 230000001808 coupling Effects 0.000 title claims abstract description 9
- 238000005859 coupling reactions Methods 0.000 title claims abstract description 8
- 238000002336 sorption--desorption measurement Methods 0.000 claims abstract description 15
- 238000004868 gas analysis Methods 0.000 claims abstract description 11
- 239000011435 rock Substances 0.000 claims abstract description 7
- 240000006028 Sambucus nigra Species 0.000 claims description 16
- 280000063503 Clamper companies 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 9
- 239000007788 liquids Substances 0.000 claims description 8
- 239000003570 air Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000006073 displacement reactions Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injections Substances 0.000 claims description 4
- 239000000203 mixtures Substances 0.000 claims description 4
- 230000001105 regulatory Effects 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- HUYJTJFLZHRCSG-UHFFFAOYSA-N [C][C]([C]1[C][C][C][C]1)[C] Chemical compound [C][C]([C]1[C][C][C][C]1)[C] HUYJTJFLZHRCSG-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- 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
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- 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
- G01N2015/0866—Sorption
Abstract
Description
Technical field
The present invention relates to a kind of coupling test system for testing Unconventional gas, specifically a kind of Unconventional gas The more PROCESS COUPLING pilot systems of rock-gas-heat.
Background technique
Unconventional gas relies on its huge resource potential and economic benefit gradually as a kind of efficient clean energy resource It is paid more and more attention.It is (flammable that Unconventional gas generally includes compact sandstone gas, coal bed gas, shale gas, gas hydrates Ice) etc., refer to that reserves are big, are difficult to develop, it is necessary to by extensive well stimulation or special development approach and advanced survey Visiting development technique could be to there is the natural gas pool of economic value yield production.
Different from conventional reservoir gas reservoir, shale (or coal) is both the source rock that natural gas generates, and aggregation and preservation are naturally The reservoir and cap rock of gas.The reservoir of shale (or coal) gas reservoir is generally in low hole, the physical property characteristic of low-permeability.Shale (or coal) gas Mostly it is present among shale (or coal) matrix or organic matter hole with absorption and free state.Shale gas and coal bed gas etc. are unconventional Gas extraction will lead to that complicated chain type is generated between reservoir internal stress field, sorption chemical field, seepage field and temperature field is anti- Answer, this chain reaction is normally defined " coupling process ", i.e. a physical process will affect another physical process starting and Development.
Coupling process occurs that the conductive performance of reservoir can be significantly changed, and specifically includes reservoir matrix contraction, porosity and infiltration Saturating rate variation.For coupling process more than science characterization, domestic and foreign scholars have developed many seepage tests equipment and permeate to reservoir Rate evolution is studied.Lin Baiquan etc. makes coal sample gas permeation experimental rig by oneself, studies the coal containing methane gas under confining pressure controlled condition Pore pressure and permeability, coal sample deformation between relationship；Tan Xueshu etc. also makes coal sample gas porous flow device by oneself, respectively to not The permeability of coal sample is studied in same stress state, not same electric field, different temperatures and deformation process；Hu Yaoqing etc. develops three axis Stress permeameter has carried out the test that triaxiality acts on lower coal gas Percolation Law；Tang Jupeng etc. made by oneself three bearing shells this Permeameter studies the relationship between effective stress and coal bed gas desorption and seepage characteristic；Grand Clear and Bright etc. is seeped using voluntarily development gas Saturating instrument has carried out experimental study of the hole air pressure to coal body Permeability.However, traditional infiltration instrumental function cannot be abundant Consider Unconventional gas migration process and temperature etc. to reservoir matrix-crack interaction influence.
For this purpose, being highly desirable to carry out under true triaxial or false triaxial stress load, temperature load, multicomponent gas diffusion The multi- scenarios method procedural test system of coal petrography permeable sandstone, disclose gas migration process in unconventional gas reservoir matrix with Coupling mechanism between crack/gas, crack and gas, temperature and gas provides important for Unconventional gas exploitation Experimental study means.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of conventional gas rock-more PROCESS COUPLINGs of gas-heat Pilot system can simulate gas enrichment of the Unconventional gas under Different Strata temperature, pressure and formation fluid ambient condition At hiding, absorption and desorption dynamic process and the experiment for carrying out coal and rock permeable sandstone.
To achieve the goals above, the technical solution adopted by the present invention is that: this kind of Unconventional gas rock-more mistakes of gas-heat Journey coupling test system, by fluid control systems, core adsorption/desorption and gas analysis system, pumped vacuum systems and waterpower pressure Split system composition, fluid control systems respectively with core adsorption/desorption and gas analysis system, pumped vacuum systems and hydraulic fracturing System is connected.
Further, the fluid control systems specifically: the second gas cylinder and third gas cylinder pass through the first valve and respectively Two valves are connected with booster pump；Be connected on pipeline between first valve and the second valve and booster pump first pressure gauge and Third valve；The mixed gas flow of gas cylinder and gas cylinder can be monitored and controlled in pressure gauge and third valve respectively；The pressurization Pump one end is connected by the 4th valve and the first pressure reducing valve with silent air compressor；Between 4th valve and the first pressure reducing valve Second pressure gauge is connected on pipeline；The booster pump other end is connected with the first four-way valve；First four-way valve and the 5th valve Door is connected；5th valve is connected with the second four-way valve；Second four-way valve is connected with the second pressure reducing valve；Described second subtracts Pressure valve is connected with the 6th valve；The 5th pressure gauge is connected on pipeline between second pressure reducing valve and the 6th valve；Described 2nd 4 The other both ends of port valve are connected with the 4th pressure gauge and first gas storage tank respectively；Distinguish at the other both ends of first four-way valve It is connected with the 7th valve and the 8th valve；8th valve is connected with third four-way valve；The third four-way valve subtracts with third Pressure valve is connected；The third pressure reducing valve is connected with the 9th valve；Connect on pipeline between the third pressure reducing valve and the 9th valve There is the 7th pressure gauge；The other both ends of the third four-way valve are connected with the 6th pressure gauge and second gas storage tank respectively.
Further, the core adsorption/desorption and gas analysis system specifically: the 6th valve and the 9th valve respectively with The both ends of them of 4th four-way valve are connected；The other both ends of 4th four-way valve respectively with the first pneumatic operated valve and the tenth valve phase Even；Tenth valve is connect with the 4th pressure reducing valve；4th pressure reducing valve is connect with the first gas cylinder；4th pressure reducing valve with Third pressure gauge and the 11st valve are connected on pipeline between tenth valve；
First pneumatic operated valve is connected with one end of the 5th four-way valve；Wherein one end and the one or three of 5th four-way valve Port valve is connected；First triple valve is connected with the second pneumatic operated valve；The other both ends of 5th four-way valve respectively with standard pressure Power room is connected with third pneumatic operated valve；The third pneumatic operated valve is connect with 50ml standard chamber；One end of first triple valve and the Four pneumatic operated valves are connected；
4th pneumatic operated valve is connected with 100ml standard chamber；Second pneumatic operated valve is connected with the 6th four-way valve；Described Six four-way valves are connected with the 5th pneumatic operated valve；5th pneumatic operated valve is connect with true triaxial clamper；The true triaxial clamper with 6th pneumatic operated valve is connected；6th pneumatic operated valve is connected with the 7th four-way valve；7th four-way valve wherein press by one end and outlet Force measuring device is connected；
The other both ends of 6th four-way valve respectively with inlet pressure detection device and the second triple valve；Described 2nd 3 The 7th pneumatic operated valve is connected on pipeline between port valve and the 6th four-way valve；Second triple valve and the 12nd valve phase Even；12nd valve is connected with pressure test device；The pressure test device is connected with the 13rd valve；The pressure difference Detection device is also in parallel with the 13rd pneumatic operated valve；13rd valve is connected with third triple valve；Second triple valve is also It is connected with the 8th four-way valve；
The third triple valve is connected with the 7th four-way valve；7th four-way valve is connected with back-pressure valve；The back-pressure valve It is connected with back pressure container；The back pressure container is connected with the 14th valve；On pipeline between back pressure container and the 14th valve Equipped with the 8th pressure gauge；14th valve is connected with backpressure pump；The backpressure pump is connected with the 15th valve；
The back-pressure valve is connected with condenser；The condenser is connected with gas-liquid separator and the 16th valve；The gas Liquid/gas separator is connected with the 4th triple valve；One end of 4th triple valve is connected with the 8th pneumatic operated valve；8th pneumatic operated valve It is connected with drier；The drier is connected with gas flowmeter；The other end and the 9th pneumatic operated valve phase of 4th triple valve Even；9th pneumatic operated valve is connected with gas drainage metering device；
The third triple valve is connected with the tenth pneumatic operated valve；Tenth pneumatic operated valve is connected with false three axle clamp holders；It is described False three axle clamp holders are connected with the 11st pneumatic operated valve；11st pneumatic operated valve is connected with the 8th four-way valve；False three axle clamp It sets equipped with temperature regulating device, ring pressure detection device, temperature measuring equipment, ess-strain device, axis pressure detection device and displacement detecting dress It sets.
Further, the pumped vacuum systems specifically: the 8th four-way valve is connected with the 12nd pneumatic operated valve；12nd gas Dynamic valve is connected with buffer；The buffer is connected with the 17th valve；The bottom of the buffer is equipped with the 18th valve；Institute It states and is connected to the 9th pressure gauge on the pipeline between buffer and the 17th valve；17th valve is connected with drying tube；Institute Drying tube is stated to be connected with vacuum pump.
Further, the fracturing system specifically: the 8th four-way valve is connected with the 13rd pneumatic operated valve；Described 13rd Pneumatic operated valve is connected with first piston container；The first piston container is connected with the 14th pneumatic operated valve；14th pneumatic operated valve It is connected with the 5th triple valve；8th four-way valve is wherein connected one end with the 15th pneumatic operated valve；15th pneumatic operated valve with Second piston container is connected；The second piston container is connected with the 16th pneumatic operated valve；16th pneumatic operated valve and described the Five triple valves are connected；The other end of 5th triple valve is connected with twin-tub injection pump.
Particularly, the adsorption/desorption system and fracturing system are placed in thermostatic chamber.
Compared with prior art, this structure of the invention has the advantage that
(1) tracking technique is pressed using ring, is pumped using high precision tracking, it is ensured that clamper ring pressure pressure and pore pressure begin Eventually in specific pressure difference；
(2) crucial measurement control unit such as gas pressurized device, gas pressure reducer, temperature control system, pressure sensor, differential pressure Sensor, electronic balance and gas chromatograph use precision instrument, guarantee experimental precision；
(3) the adsorption/desorption amount under different stress, pore pressure, formation temperature conditions can be carried out to true and false three shaft model Measurement, research adsorbance at any time, the dynamic changing process of temperature and air pressure；Carry out permeability test；
(4) sensor combinations use, and according to experiment displacement pressure, software systems automatically select the sensor of suitable range, Improve data precision；
(5) modularized design, it is simple and clear, it is easy to operate, facilitate device upgrade to be transformed；
(6) system design has superpressure, overtemperature automatic alarm closing function, designs dangerous gas warning system, guarantee is set Standby safe operation and personal safety.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the electrical schematic diagram of acquisition, observing and controlling in the present invention.
Specific embodiment
The invention will be further described below.
As shown in Figure 1, the present invention is by fluid control systems, core adsorption/desorption and gas analysis system, pumped vacuum systems Formed with fracturing system, fluid control systems respectively with core adsorption/desorption and gas analysis system, pumped vacuum systems and Fracturing system is connected.
Further, the fluid control systems specifically: the second gas cylinder 2 and third gas cylinder 3 pass through 5 He of the first valve respectively Second valve 6 is connected with booster pump 9；First is connected on pipeline between first valve 5 and the second valve 6 and booster pump 9 Pressure gauge 7 and third valve 8；The mixed gas of gas cylinder 2 and gas cylinder 3 can be monitored and controlled in pressure gauge 7 and third valve 8 respectively Flow；Described 9 one end of booster pump is connected by the 4th valve 10 and the first pressure reducing valve 12 with silent air compressor 13；4th valve Second pressure gauge 11 is connected on pipeline between door 10 and the first pressure reducing valve 12；9 other end of booster pump and the first four-way valve 86 are connected；First four-way valve 86 is connected with the 5th valve 18；5th valve 18 is connected with the second four-way valve 87；It is described Second four-way valve 87 is connected with the second pressure reducing valve 20；Second pressure reducing valve 20 is connected with the 6th valve 22；Second pressure reducing valve 20 The 5th pressure gauge 21 is connected on pipeline between the 6th valve 22；The other both ends of second four-way valve 87 are respectively with the 4th Pressure gauge 19 is connected with first gas storage tank 28；Different types of gas is pressurized for convenience, first four-way valve 86 Other both ends be connected respectively with the 7th valve 17 and the 8th valve 23；8th valve 23 is connected with third four-way valve 88； The third four-way valve 88 is connected with third pressure reducing valve 25；The third pressure reducing valve 25 is connected with the 9th valve 27；The third The 7th pressure gauge 26 is connected on pipeline between pressure reducing valve 25 and the 9th valve 27；The other both ends of the third four-way valve 88 point It is not connected with the 6th pressure gauge 24 and second gas storage tank 29.
It further, is progress pore volume measurements, the core adsorption/desorption and gas analysis system specifically: the 6th Valve 22 is connected with the both ends of them of the 4th four-way valve 89 respectively with the 9th valve 27；The other both ends of 4th four-way valve 89 It is connected respectively with the first pneumatic operated valve 31 and the tenth valve 30；Tenth valve 30 is connect with the 4th pressure reducing valve 14；Described 4th Pressure reducing valve 14 is connect with the first gas cylinder 1；Third pressure is connected on pipeline between 4th pressure reducing valve 14 and the tenth valve 31 Table 15 and the 11st valve 16；
First pneumatic operated valve 31 is connected with one end of the 5th four-way valve 90；Wherein one end of 5th four-way valve 89 with First triple valve 91 is connected；First triple valve 91 is connected with the second pneumatic operated valve 37；Other the two of 5th four-way valve 90 End is connected with normal pressure room 32 and third pneumatic operated valve 33 respectively；The third pneumatic operated valve 33 is connect with 50ml standard chamber 34；Institute The one end for stating the first triple valve 91 is connected with the 4th pneumatic operated valve 35；
4th pneumatic operated valve 35 is connected with 100ml standard chamber 36；Second pneumatic operated valve 37 and 92 phase of the 6th four-way valve Even；6th four-way valve 92 is connected with the 5th pneumatic operated valve 38；5th pneumatic operated valve 38 is connect with true triaxial clamper 41；Institute True triaxial clamper 41 is stated to be connected with the 6th pneumatic operated valve 42；6th pneumatic operated valve 42 is connected with the 7th four-way valve 94；Described Wherein one end is connected seven four-way valves 94 with outlet pressure measuring device 56；
To guarantee that the pressure in true, false three axle clamp holders are stablized, the other both ends of the 6th four-way valve 92 respectively with enter Mouth pressure-detecting device 40 and the second triple valve 93；On pipeline between second triple valve 93 and the 6th four-way valve 92 It is connected with the 7th pneumatic operated valve 39；Second triple valve 93 is connected with the 12nd valve 43；12nd valve 43 is examined with pressure difference Device 44 is surveyed to be connected；The pressure test device 44 is connected with the 13rd valve 45；The pressure test device 44 and the 13rd Pneumatic operated valve 46 is in parallel；13rd valve 45 is connected with third triple valve 95；Second triple valve 93 is also with the described 8th Four-way valve 97 is connected；
For convenience of the pressure adjusted in true, false three axle clamp holders, the third triple valve 95 is connected with the 7th four-way valve 94； 7th four-way valve 94 is connected with back-pressure valve 57；The back-pressure valve 57 is connected with back pressure container 58；The back pressure container 58 with 14th valve 60 is connected；8th pressure gauge 59 is housed on the pipeline between back pressure container 58 and the 14th valve 60；Described 14 valves 60 are connected with backpressure pump 61；The backpressure pump 61 is connected with the 15th valve 62；
To carry out the stripping gas scale of construction or gas vent flow and gas component concentrations test, the back-pressure valve 57 and condenser 63 are connected；The condenser 63 is connected with gas-liquid separator 64 and the 16th valve 65；The gas-liquid separator 64 and the four or three Port valve 96 is connected；One end of 4th triple valve 96 is connected with the 8th pneumatic operated valve 68；8th pneumatic operated valve 68 and drier 67 are connected；The drier 67 is connected with gas flowmeter 66；The other end and the 9th pneumatic operated valve 69 of 4th triple valve 96 It is connected；9th pneumatic operated valve 69 is connected with gas drainage metering device 70；
The third triple valve 95 is connected with the tenth pneumatic operated valve 55；Tenth pneumatic operated valve 55 and 51 phase of false three axle clamp holder Even；The false three axle clamps holder 51 is connected with the 11st pneumatic operated valve 47；11st pneumatic operated valve 47 and 97 phase of the 8th four-way valve Even；False three axle clamp set on 51 equipped with temperature regulating device 48, ring pressure detection device 49, temperature measuring equipment 50, ess-strain device 52, Axis presses detection device 53 and displacement detector 54.
Required vacuum environment when further, to guarantee experiment, the pumped vacuum systems specifically: the 8th four-way valve 97 with 12nd pneumatic operated valve 79 is connected；12nd pneumatic operated valve 79 is connected with buffer 80；80 and the 17th valve of buffer 83 are connected；The bottom of the buffer 80 is equipped with the 18th valve 81；Pipe between 80 and the 17th valve 83 of buffer Road is connected to the 9th pressure gauge 82；17th valve 83 is connected with drying tube 84；The drying tube is connected with vacuum pump 85.
There are enough power, the fracturing system when further, to ensure hydraulic fracturing specifically: the 8th four-way valve 97 are connected with the 13rd pneumatic operated valve 71；13rd pneumatic operated valve 71 is connected with first piston container 72；The first piston holds Device 72 is connected with the 14th pneumatic operated valve 73；14th pneumatic operated valve 73 is connected with the 5th triple valve 98；8th four-way valve 97 wherein one end be connected with the 15th pneumatic operated valve 74；15th pneumatic operated valve 74 is connected with second piston container 75；Described Two piston containers 75 are connected with the 16th pneumatic operated valve 76；16th pneumatic operated valve 76 is connected with the 5th triple valve 98；Institute The other end for stating the 5th triple valve 98 is connected with twin-tub injection pump 76.
Particularly, the adsorption/desorption system and fracturing system are placed in thermostatic chamber 99.Convenient for the survey of system Examination.
As depicted in figs. 1 and 2, above-mentioned experimental system can carry out Unconventional gas on Different Strata temperature, pressure and ground Enrichment And Reservoiring, Adsorption and desorption process experiment under layer fluid ambient condition, the specific steps are as follows: be first packed into the first gas cylinder 1 Helium, the interior loading methane gas of the second gas cylinder 2, third gas cylinder 3 is interior to be packed into nitrogen.
Gas boosting: methane gas reaches gas booster pump 9 through the first valve 5, and booster pump 9 is in silent air compressor 13, the One pressure reducing valve 12, the lower start-up operation of the 4th valve 10 effect, pressurized high pressure gas reach second gas through the 8th valve 23 Storage tank 29, pressurization, which finishes, closes the 8th valve 23, opens the methane gas in the 7th valve 17 emptying pipeline.Open the second valve 6 are pressurized nitrogen using same method, and pressurized high pressure gas reaches first gas storage tank 28 through the 5th valve 18, Pressurization, which finishes, closes the 5th valve 18, opens the nitrogen in the 7th valve 17 emptying pipeline.
High pressure pressure testing: by backpressure pump 57, the 14th valve 60, back pressure container 58, control pressure is applied to back-pressure valve 57. High pressure nitrogen reaches nitrogen by the second pressure reducing valve 20, the 6th valve 22, pneumatic operated valve 31,37,38 or 47,42 or 55 Need pipeline to be tested, i.e. true triaxial clamper 41 or false three axle clamp holders 51.After pressure reaches requirement of experiment pressure, close Valve 31 carries out pressure to coal and rock sample using true triaxial clamper 41 or false three axle clamp holders 51 according to the standard requirements time Test.It is completed, opens high pressure gas in 39 blowdown piping of valve.
Pore volume measurements: first using vacuum pump 85 through the 17th valve 83, the 12nd pneumatic operated valve 79 to standard chamber and True triaxial clamper 41 carries out vacuum pumping.Helium is through the 19th valve 4, the 4th pressure reducing valve 14, the 11st valve 16, pneumatic Valve 31,33 reaches 50ml standard chamber 34, closes the first pneumatic operated valve 31, waits second pneumatic operated valve the 37, the 5th of opening after pressure stabilisation After pneumatic operated valve 38, starts to be filled with helium around the coal petrography sample in true triaxial clamper 41, pressure data is waited to stablize.According to wave justice You calculate pore volume by law.It is completed, opens high pressure gas in 39 blowdown piping of the 7th pneumatic operated valve.
Absorption measurement: first turning on insulating box 99, be transferred to experiment required temperature, and vacuum pump 85 is used after temperature plateau Vacuum pumping is carried out to standard chamber and true triaxial clamper 41 through the 17th valve 83, the 12nd pneumatic operated valve 79.High pressure methane Gas reaches standard chamber through third pressure reducing valve 25, the 9th valve 27, the first pneumatic operated valve 31, third pneumatic operated valve 33, and it is pneumatic to close first Coal petrography sample week after second pneumatic operated valve 37 of the opening after pressure stabilisation such as valve 31, the 5th pneumatic operated valve 38, in true triaxial clamper 41 It encloses and starts to be filled with methane gas, pressure data is waited to stablize.According to Boyle law, inhaled in conjunction with calculating such as pore volume test parameters Attached volume.It is completed, opens high pressure gas in 39 blowdown piping of the 7th pneumatic operated valve.
The stripping gas scale of construction or gas vent flow and gas component concentrations test: the 5th pneumatic operated valve 38 is closed, opens the 6th Pneumatic operated valve 42 reduces outlet pressure to requirement of experiment pressure by backpressure pump 61, desorption gas through back-pressure valve 57, condenser 63, Gas-liquid separator 64, the 8th pneumatic operated valve 68, drier 67 calculate the stripping gas scale of construction by exit gas mass flowmenter 66, such as Flow is smaller to automatically switch to the 9th pneumatic operated valve 69 by computer software, is measured by gas drainage arrangement 70.Gas component and dense Degree is detected by Agilent 7890B gas chromatograph.
Gas drive tests permeability test: high pressure nitrogen is through the second pressure reducing valve 20, the 6th valve 22, the first pneumatic operated valve 31, the Two pneumatic operated valves 37, the 5th pneumatic operated valve 38, true triaxial clamper 41, the 6th pneumatic operated valve 42, back-pressure valve 57, condenser 63, gas-liquid point From device 64, the 8th pneumatic operated valve 68, drier 67, exit gas is measured through flowmeter 66.Inlet and outlet pressure, differential pressure are passed by pressure Sensor 40, differential pressure pick-up 44 measure, and computer software is counted automatically by the initial data combination set formula of acquisition and input Calculate permeability.
Hydraulic fracturing: first turning on insulating box 99, is transferred to experiment required temperature, adds pressure break solution after temperature plateau Enter to second piston container 75, second piston container 75 provides power by twin-tub injection pump 77, and motive fluid is injected through twin-tub The 77, the 5th triple valve 98 of pump acts on piston, and piston pushes pressure break solution to enter pipeline through the 15th pneumatic operated valve 74, the 11st gas Dynamic valve 47 enters false three axle clamp holders 51 and carries out pressure break to rock core, acquires inlet pressure in real time in fracturing process, works as inlet pressure Illustrate that pressure break is completed when reducing suddenly.
Oxygen is simulated by false three axle clamp holders 51 and participates in lower coal body evolution temperature-rise period, obtains oxidizing temperature, gas in due course Body flow, the parameters such as multicomponent gas concentration, while in coal body loading chamber and the safety of pipeline have safety precautions. Specific implementation step is:
2 groups of temperature sensor test points 50 are installed in three axle clamp holder 51 of vacation, directly test coal petrography sample temperature, pass through calculating Machine software collection thermometric numerical value judges coal body evolution temperature-rise period by temperature value.Nitrogen, oxygen mixed gas are after being pressurized It is stored in first gas storage tank 28, high pressure gas is through the second pressure reducing valve 20, the 6th valve 22, the first pneumatic operated valve 31, the second gas Dynamic valve 37, the 11st pneumatic operated valve 47 enter false three axle clamp holders 51, and false triaxial core rises under the effect of PID instrument program temperature control 48 Temperature measures core temperature variations by the temperature probe 50 inside false three axle clamp holders 51, and outlet passes through gas flowmeter 66 meter gaseous flows carry out content and proximate analysis to gas by gas chromatograph.
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| CN107313754A (en) * | 2017-07-28 | 2017-11-03 | 中国地质调查局油气资源调查中心 | A kind of gas hydrates develop the injected system of analogue experiment installation |
| CN107462508B (en) * | 2017-08-16 | 2018-10-02 | 西南石油大学 | A kind of multi- scenarios method seepage flow multifunction experiment apparatus and test method |
| CN107764510B (en) * | 2017-10-13 | 2019-11-15 | 中国科学院武汉岩土力学研究所 | A kind of simulator and experimental method for the research of oil-gas in the storage cavern of salt cave-brine migration rule |
| CN108760802A (en) * | 2018-05-21 | 2018-11-06 | 辽宁工程技术大学 | Temperature Evolution token test device and method during coal petrography adsorption-desorption gas |
| CN108844850A (en) * | 2018-07-11 | 2018-11-20 | 中国石油大学(华东) | Shale adsorption-desorption and decompression exploitation simulator and method based on dynamic equilibrium |
| CN109060629A (en) * | 2018-09-04 | 2018-12-21 | 中国矿业大学(北京) | A kind of three axis non-isothermal multiphase porous flow experimental system of deep soft rock |
| CN109470616A (en) * | 2018-10-31 | 2019-03-15 | 重庆大学 | Rock multifunction seepage test macro |
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