CN103558137A - Device for measuring gas-water two-phase relative permeability of porous medium - Google Patents
Device for measuring gas-water two-phase relative permeability of porous medium Download PDFInfo
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- CN103558137A CN103558137A CN201310590785.8A CN201310590785A CN103558137A CN 103558137 A CN103558137 A CN 103558137A CN 201310590785 A CN201310590785 A CN 201310590785A CN 103558137 A CN103558137 A CN 103558137A
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Abstract
The invention discloses a device for measuring the gas-water two-phase relative permeability of a porous medium. A fluid source sub-system is connected with a filter inside a fluid injection and control sub-system through a stainless steel pipe; the fluid injection and control sub-system is connected with a cushion block inside a rock core clamping sub-system through a stainless steel pipe; the cushion block inside the rock core clamping sub-system is connected with a gas-water separating device inside a gas-water separating sub-system through a hydrophobic lining stainless steel pipe; the gas-water separating device inside the gas-water separating sub-system is connected with a tee joint inside the fluid injection and control sub-system through a stainless steel pipe; a thermostatic water bath inside a temperature control sub-system is connected with a fluid injection metering pump temperature control cavity and a gas metering pump temperature control cavity inside the fluid injection and control sub-system respectively through an external circulating water pipe. According to the device, the measurement errors of water saturation in rocks are reduced; the device has a simple principle and a clear structure, and can accurately measure the gas-water two-phase relative permeability of the porous medium, especially dense rocks, such as shale and coal rocks, with low permeability.
Description
Technical field
The present invention relates to the technical field of measurement and test of Porous Media characteristic, relate in particular to the air water two phase fluid flow characteristic test field of the tight rocks such as shale, coal petrography, more specifically relate to a kind of device of measuring porous medium air water two-phase relative permeability.
Background technology
Along with human society increases day by day to the demand of the energy, not only coal, oil, these conventional gas and oil resources of rock gas are developed and are used, the unconventional gas resourcess such as coal-seam gas, shale gas, compact sandstone gas are also more and more subject to people's attention, and conduct a research one after another and develop.Different with coal and oil, rock gas normally with freely or the mode of absorption be stored in the Zhong， rock stratum, rock stratum of porous structure except there being rock gas also to have a large amount of moisture content simultaneously.In gas exploitation course, normally the gentle while of water is exploited out.In this process, the migration of air water is relevant with air water two-phase relative permeability separately, and the size of gas phase relative permeability is the key parameter that determines natural gas extraction efficiency.Therefore, Measurement accuracy relative permeability is significant for the exploitation of natural gas source.
In the relative permeability measurement of rock (shale, coal petrography, sandstone etc.), most critical is the water saturation of measuring in rock.Relative permeability is measured the two kinds of methods that mainly contain at present: steady state method and unstable state method.Simply, steady state method is simultaneously gentle to injected water in rock, after fluid flow equilibrium in rock, according to the water saturation of injecting and flow out the water yield computing rock of rock; But not steady state method is first by rock water saturation, in rock, inject by water saturated gas afterwards, until fluid, in rock after flow equilibrium, by metering, flow out water saturation degree in the water yield computing rock of rock.For the larger rock of porosity as sandstone, water saturation wherein changes larger in test process, relatively lower to the requirement of measuring accuracy; But for picture shale, these fine and close rocks of coal petrography, factor of porosity is very little, and in relative permeability test process, from rock, the displacement water yield out belongs to trace, therefore, must be higher to the accuracy requirement of measuring.Moisture content even residual the dead volume from rock water side to the pipeline flowmeter, equipment or absorption all can affect test result greatly.And some relative permeability proving installations of report are not often all considered these influence factors at present.
Therefore, the measuring accuracy of relative permeability be improved, the measuring accuracy of water saturation must be managed to improve, must the impact of minimizing equipment on moisture content metering itself.
Summary of the invention
The object of the invention is to be to provide a kind of device of measuring porous medium air water two-phase relative permeability, simple in structure, easy to operate, this device improved rock especially the tight rock such as shale, coal petrography relative permeability measure in the measuring accuracy of water saturation.
In order to achieve the above object, the present invention adopts following technical scheme:
Measure a device for porous medium air water two-phase relative permeability, this device comprises fluid source subsystem, fluid injection and control subsystem, core clamping subsystem, separating system for water, data acquisition subsystem and temperature control subsystem.It is characterized in that: fluid source subsystem is injected and is connected with the first filtrator in control subsystem with fluid by stainless-steel tube, for fluid injects with control subsystem, provide fluid source; Fluid injects with control subsystem and is connected with the first end cushion block in core clamping subsystem by stainless-steel tube, gives sample beam body; The second end cushion block in core clamping subsystem is connected with the gas and water separator in gas-water separation subsystem by hydrophobic inner liner stainless steel pipe; Gas and water separator in gas-water separation subsystem is injected and is connected with the 9th threeway in control subsystem with fluid by stainless-steel tube; The Water Tank with Temp.-controlled that the pipeline portions of fluid injection and control subsystem, core clamping subsystem and gas-water separation subsystem are placed on temperature control subsystem keeps constant temperature; Water Tank with Temp.-controlled in temperature control subsystem is injected with the fluid injection volume pump temperature control chamber of control subsystem and is connected with gas volume pump temperature control chamber with fluid respectively by external circulating water pipe, and the fluid in convection cell injection volume pump and the gas in gas volume pump are realized temperature control; Fluid injects with the fluid of control subsystem and injects volume pump, gas dosing pump, pressure gauge, differential pressure gauge, core clamps the pressure gauge of subsystem and the differential pressure gauge of gas-water separation subsystem is connected with the capture card in data acquisition subsystem by cable.Wherein, fluid source subsystem comprises water container, gas cylinder, reduction valve, valve, threeway; Fluid injects with control subsystem and comprises that stainless-steel tube, fluid inject volume pump, gas dosing pump, fluid injection volume pump temperature control chamber, gas dosing pump temperature control chamber, filtrator (totally 2), valve (totally 7), threeway (totally 9), pressure gauge (totally 2), differential pressure gauge, vacuum pump, vacuum meter; Core clamping subsystem comprises pressure chamber, confined pressure liquid, the first porous gasket, the second porous gasket, first end cushion block, the second end cushion block, the first porous gasket fluid bore, the second porous gasket fluid bore, first end cushion block fluid bore, the first-class body opening of the second end cushion block, the second end cushion block second body opening, hydrophobic inner liner stainless steel pipe, confined pressure pump, pressure gauge, threeway, valve, sample, encapsulant; Gas-water separation subsystem comprises gas and water separator, differential pressure gauge, threeway; Data acquisition subsystem comprises computing machine, usb data line, capture card, cable (totally 7); Temperature control subsystem comprises Water Tank with Temp.-controlled, external circulating water pipe.Each parts concrete structure annexation is as follows:
Fluid source subsystem: gas cylinder is connected with reduction valve, for regulating from gas cylinder gaseous tension out; Reduction valve is connected with threeway one end; Water container is connected with the threeway other end by valve; Threeway the 3rd end injects and is connected with the stainless-steel tube of control subsystem with fluid.
Fluid injects and control subsystem: the first filtrator is connected with the first valve; The first valve injects volume pump with fluid and is connected; Fluid injects volume pump and is connected with the second valve; The second valve is connected with one end of the first threeway; The other two ends of the first threeway are connected with one end of the second threeway with the first pressure gauge respectively; The other end of the second threeway is connected with the first end cushion block in core clamping subsystem by stainless-steel tube; The 3rd end of the second threeway is connected with one end of the 3rd threeway by stainless-steel tube; The other end of the 3rd threeway connects the 3rd valve; The 3rd end of the 3rd threeway is connected with one end of the 8th threeway by stainless-steel tube; The other end of the 8th threeway is connected with differential pressure gauge; The 3rd end of the 8th threeway is connected with one end of the 7th threeway; The second end of the 7th threeway is connected with one end of the 9th threeway; The other end of the 9th threeway is connected with the 3rd valve; The 3rd end of the 9th threeway is connected with the gas and water separator in gas-water separation subsystem by stainless-steel tube; The 3rd end of the 7th threeway is connected with one end of the 6th threeway; The other end of the 6th threeway is connected with the second pressure gauge; The 3rd end of the 6th threeway is connected with the second filtrator; The second filtrator is connected with the 4th valve; The 4th valve is connected with gas dosing pump; Gas dosing pump is connected with the 5th valve; The 5th valve is connected with one end of the 4th threeway; The other end of the 4th threeway is connected with one end of the 5th threeway; The 3rd end of the 4th threeway is connected with the 7th valve; The second end of the 5th threeway is connected with vacuum meter; The 3rd end of the 5th threeway is connected with the 6th valve; The 6th valve is connected with vacuum pump.
Core clamping subsystem: sample two ends contact with more than second empty pads with the first porous gasket respectively, for evenly injecting fluid to sample; The first porous gasket and more than second empty pads respectively with first end cushion block with contact with the second end cushion block; First end cushion block, the first porous gasket, sample, more than second empty pads, the second end cushion block are by encapsulant environmental sealing; First end cushion block fluid bore is injected and is connected with the second threeway of control subsystem with fluid by stainless-steel tube; The first-class body opening of the second end cushion block is connected with the gas and water separator in gas-water separation subsystem by hydrophobic inner liner stainless steel pipe; Confined pressure pump is connected with threeway; Threeway the second end is connected with pressure gauge; Threeway the 3rd end is connected with valve; Valve is connected with the second end cushion block second body opening by stainless-steel tube, for inject confined pressure liquid in pressure chamber.
Gas-water separation subsystem: threeway one end is connected with differential pressure gauge; Another two ports of the threeway respectively top and bottom of gas and water separator connect; Gas and water separator upper end is connected with hydrophobic inner liner stainless steel pipe; Gas and water separator upper end is injected and is connected with the 9th threeway of control subsystem with fluid by stainless-steel tube.
Data acquisition subsystem: capture card is connected with computing machine by usb data line.
Temperature control subsystem: external circulating water pipe is connected with Water Tank with Temp.-controlled.
Utilize the present invention to carry out the method that rock air water two-phase relative permeability measures as follows:
1, according to the present invention, manufacture sampler.
2, be ready to sample to be tested, and sample is immersed in distilled water to 48 hours, make sample fully saturated.
3, first end cushion block, the first porous gasket and sample and the second porous gasket, the second end cushion block are fitly stacked together, encapsulant is enclosed within around them, by first end cushion block, the first porous gasket and sample and the second porous gasket, the second end cushion block tightly together with environmental sealing.
4, first end cushion block fluid bore is injected and is connected with the second threeway of control subsystem with fluid by stainless-steel tube; The first-class body opening of the second end cushion block is connected with the gas and water separator in gas-water separation subsystem by hydrophobic inner liner stainless steel pipe.
5, utilize confined pressure pump in pressure chamber, to inject confined pressure liquid by the second end cushion block second body opening, utilize the confined pressure liquid pressing in confined pressure Beng Gei pressure chamber, until confined pressure fluid pressure reaches experiment required pressure (being confined pressure) in pressure chamber.
6, open the valve being connected with water container, to fluid, inject volume pump and pour 10 milliliters of left and right distilled water, close the valve being connected with water container; Open reduction valve, to fluid, inject the full gas of volume pump punching; The water and the gas that allow fluid inject volume pump reach wetting balance.
7, gas dosing pump and fluid being set respectively, to inject volume pump be constant voltage mode, and fluid injects volume pump and to sample, injects fluid with the pressure of a little higher than gas dosing pump, can carry out the relative permeability experiments of measuring of sample.
The present invention compared with prior art, has the following advantages and good effect:
1, a kind of device of measuring porous medium air water two-phase relative permeability, this device is by carrying out hydrophobic Lining treatment and avoid or reduce residual in pipeline of water in porous medium air water two-phase relative permeability measuring process to associated pipe, guarantee that displacement water out all enters gas and water separator from rock sample, reduce the error that in rock, water saturation is measured; Principle is simple, clear in structure.
2, a kind of device of measuring porous medium air water two-phase relative permeability, this device is accurately measured from rock displacement moisture content out the height at gas and water separator by differential pressure gauge, be converted into the water yield, and then the water saturation in computing rock, water saturation measuring accuracy improved.
3, application the present invention can accurately measure porous medium especially as the air water two-phase relative permeability of shale, compacted rock that coal petrography isoperm is low.
Accompanying drawing explanation
Fig. 1 is a kind of apparatus structure schematic diagram of measuring porous medium air water two-phase relative permeability.
Wherein: 1-fluid source subsystem (comprising gas cylinder 1.1, water container 1.2, reduction valve 1.3, valve 1.4, threeway 1.5);
2-fluid injects with control subsystem and (comprises stainless-steel tube 2.1, fluid injects volume pump 2.2a, gas dosing pump 2.2b, filtrator 2.3(comprises the first filtrator 2.3a, totally 2 of the second filtrator 2.3b), fluid injects volume pump temperature control chamber 2.10a, gas dosing pump temperature control chamber 2.10b, valve 2.4(the first valve 2.4a, the second valve 2.4b, the 3rd valve 2.4c, the 4th valve 2.4d, the 5th valve 2.4e, the 6th valve 2.4f, totally 7 of the 7th valve 2.4g), threeway 2.5(the first threeway 2.5a, the second threeway 2.5b, the 3rd threeway 2.5c, the 4th threeway 2.5d, the 5th threeway 2.5e, the 6th threeway 2.5f, the 7th threeway 2.5g, the 8th threeway 2.5h, totally 9 of the 9th threeway 2.5i), pressure gauge 2.6(the first pressure gauge 2.6a, totally 2 of the second pressure gauge 2.6b), differential pressure gauge 2.7, vacuum pump 2.8, vacuum meter 2.9),
3-core clamping subsystem (comprises pressure chamber 3.1, confined pressure liquid 3.2, porous gasket 3.3(the first porous gasket 3.3a, totally 2 of the second porous gasket 3.3b), end cushion block 3.4(first end cushion block 3.4a, totally 2 of the second end cushion block 3.4b), porous gasket fluid bore 3.5(the first porous gasket fluid bore 3.5a, the second totally 2 groups of porous gasket fluid bore 3.5b), end cushion block fluid bore 3.6(first end cushion block fluid bore 3.63a, the first-class body opening 3.6b of the second end cushion block, totally 3 of the second end cushion block second body opening 3.6c), hydrophobic inner liner stainless steel pipe 3.7, confined pressure pump 3.8, pressure gauge 3.9, threeway 3.10, valve 3.11, sample 3.12, encapsulant 3.13),
4-gas-water separation subsystem (comprising gas and water separator 4.1, differential pressure gauge 4.2, threeway 4.3);
5-data acquisition subsystem (comprising totally 7, computing machine 5.1, usb data line 5.2, capture card 5.3, cable 5.4(the first cable 5.4a, the second cable 5.4b, the 3rd cable 5.4c, the 4th cable 5.4d, the 5th cable 5.4e, the 6th cable 5.4f, the 7th cable 5.4g));
6-temperature control subsystem (comprising Water Tank with Temp.-controlled 6.1, external circulating water pipe 6.2).
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Measure a device for porous medium air water two-phase relative permeability, this device comprises that fluid source subsystem 1, fluid inject and control subsystem 2, core clamping subsystem 3, separating system for water 4, data acquisition subsystem 5 and temperature control subsystem 6.It is characterized in that: fluid source subsystem 1 is injected and is connected with the first filtrator 2.3a in control subsystem 2 with fluid by stainless-steel tube 2.1, for fluid injects with control subsystem 2, provide fluid source; Fluid injects with control subsystem 2 and is connected with the first end cushion block 3.4a in core clamping subsystem 3 by stainless-steel tube 2.1, gives sample 3.12 beam bodies; The second end cushion block 3.4b in core clamping subsystem 3 is connected with the gas and water separator 4.1 in gas-water separation subsystem 4 by hydrophobic inner liner stainless steel pipe 3.7; Gas and water separator 4.1 in gas-water separation subsystem 4 is injected and is connected with the 9th threeway 2.5i in control subsystem 2 with fluid by stainless-steel tube 2.1; The Water Tank with Temp.-controlled 6.1 that the pipeline portions of fluid injection and control subsystem 2, core clamping subsystem 3 and gas-water separation subsystem 4 are placed on temperature control subsystem 6 keeps constant temperature; Water Tank with Temp.-controlled 6.1 in temperature control subsystem 6 is injected with the fluid injection volume pump temperature control chamber 2.10a of control subsystem 2 and is connected with gas volume pump temperature control chamber 2.10b with fluid respectively by external circulating water pipe 6.2, and the fluid in convection cell injection volume pump 2.2a and the gas in gas volume pump 2.2b are realized temperature control; Fluid injects with the fluid of control subsystem 2 and injects volume pump 2.2a, gas dosing pump 2.2b, pressure gauge 2.6, differential pressure gauge 2.7, core clamps the pressure gauge 3.9 of subsystem 3 and the differential pressure gauge 4.2 of gas-water separation subsystem 4 is connected with the capture card 5.3 in data acquisition subsystem 5 by cable 5.4.
Wherein, fluid source subsystem 1 comprises gas cylinder 1.1, water container 1.2, reduction valve 1.3, valve 1.4, threeway 1.5; Its annexation is: gas cylinder 1.1 is connected with reduction valve 1.3, for regulating from gas cylinder 1.1 gaseous tension out; Reduction valve 1.3 is connected with threeway 1.5 one end; Water container 1.2 is connected with threeway 1.5 other ends by valve 1.4; Threeway 1.5 the 3rd end injects and is connected with the stainless-steel tube 2.1 of control subsystem 2 with fluid.
Fluid injects with control subsystem 2 and comprises stainless-steel tube 2.1, fluid injects volume pump 2.2a, gas dosing pump 2.2b, the first filtrator 2.3a, the second filtrator 2.3b, fluid injects volume pump temperature control chamber 2.10a, gas dosing pump temperature control chamber 2.10b, the first valve 2.4a, the second valve 2.4b, the 3rd valve 2.4c, the 4th valve 2.4d, the 5th valve 2.4e, the 6th valve 2.4f, the 7th valve 2.4g, the first threeway 2.5a, the second threeway 2.5b, the 3rd threeway 2.5c, the 4th threeway 2.5d, the 5th threeway 2.5e, the 6th threeway 2.5f, the 7th threeway 2.5g, the 8th threeway 2.5h, the 9th threeway 2.5i, the first pressure gauge 2.6a, the second pressure gauge 2.6b, differential pressure gauge 2.7, vacuum pump 2.8, vacuum meter 2.9, its annexation is: the first filtrator 2.3a is connected with the first valve 2.4a, the first valve 2.4a injects volume pump 2.2a with fluid and is connected, fluid injects volume pump 2.2a and is connected with the second valve 2.4b, the second valve 2.4b is connected with one end of the first threeway 2.5a, the other two ends of the first threeway 2.5a are connected with one end of the second threeway 2.5b with the first pressure gauge 2.6a respectively, the other end of the second threeway 2.5b is connected with the first end cushion block 3.4a in core clamping subsystem 3 by stainless-steel tube 2.1, the 3rd end of the second threeway 2.5b is connected with one end of the 3rd threeway 2.5c by stainless-steel tube 2.1, the other end of the 3rd threeway 2.5c connects the 3rd valve 2.4c, the 3rd end of the 3rd threeway 2.5c is connected with one end of the 8th threeway 2.5h by stainless-steel tube 2.1, the other end of the 8th threeway 2.5h is connected with differential pressure gauge 2.7, the 3rd end of the 8th threeway 2.5h is connected with one end of the 7th threeway 2.5g, the second end of the 7th threeway 2.5g is connected with one end of the 9th threeway 2.5i, the other end of the 9th threeway 2.5i is connected with the 3rd valve 2.4c, the 3rd end of the 9th threeway 2.5i is connected with the gas and water separator 4.1 in gas-water separation subsystem 4 by stainless-steel tube 2.1, the 3rd end of the 7th threeway 2.5g is connected with one end of the 6th threeway 2.5f, the other end of the 6th threeway 2.5f is connected with the second pressure gauge 2.6b, the 3rd end of the 6th threeway 2.5f is connected with the second filtrator 2.3b, the second filtrator 2.3b is connected with the 4th valve 2.4d, the 4th valve 2.4d is connected with gas dosing pump 2.2b, gas dosing pump 2.2b is connected with the 5th valve 2.4e, the 5th valve 2.4e is connected with one end of the 4th threeway 2.5d, the other end of the 4th threeway 2.5d is connected with one end of the 5th threeway 2.5e, the 3rd end of the 4th threeway 2.5d is connected with the 7th valve 2.4g, the second end of the 5th threeway 2.5e is connected with vacuum meter 2.9, the 3rd end of the 5th threeway 2.5e is connected with the 6th valve 2.4f, the 6th valve 2.4f is connected with vacuum pump 2.8.
Core clamping subsystem 3 comprises pressure chamber 3.1, confined pressure liquid 3.2, the first porous gasket 3.3a, the second porous gasket 3.3b, first end cushion block 3.4a, the second end cushion block 3.4b, the first porous gasket fluid bore 3.5a, the second porous gasket fluid bore 3.5b, first end cushion block fluid bore 3.63a, the first-class body opening 3.6b of the second end cushion block, the 3rd end cushion block second body opening 3.6c, hydrophobic inner liner stainless steel pipe 3.7, confined pressure pump 3.8, pressure gauge 3.9, threeway 3.10, valve 3.11, sample 3.12, encapsulant 3.13, its annexation is: sample 3.12 two ends contact with the second porous gasket 3.3b with the first porous gasket 3.3a respectively, for evenly injecting fluid to sample 3.12, the first porous gasket 3.3a and the pad of emptying aperture more than second 3.3b respectively with first end cushion block 3.4a with contact with the second end cushion block 3.4b, first end cushion block 3.4a, the first porous gasket 3.3a, sample 3.12, the second porous gasket 3.3b, the second end cushion block 3.4b are by encapsulant 3.13 environmental sealings, first end cushion block fluid bore 3.6a is injected and is connected with the second threeway 2.5b of control subsystem 2 with fluid by stainless-steel tube 2.1, the first-class body opening 3.6b of the second end cushion block is connected with the gas and water separator 4.1 in gas-water separation subsystem 4 by hydrophobic inner liner stainless steel pipe 3.7, confined pressure pump 3.8 is connected with threeway 3.10, threeway 3.10 second ends are connected with pressure gauge 3.9, threeway 3.10 the 3rd end is connected with valve 3.11, valve 3.11 is connected with the second end cushion block second body opening 3.6c by stainless-steel tube 2.1, for the 3.1 interior injection confined pressure liquid 3.2 to pressure chamber, 3.1 upper ends, pressure chamber are injected and are connected with the threeway 2.5b of control subsystem 2 with fluid by stainless-steel tube 2.1, 3.1 lower ends, pressure chamber are connected with the gas and water separator 4.1 in gas-water separation subsystem 4 by hydrophobic inner liner stainless steel pipe 3.7.
Gas-water separation subsystem 4 comprises gas and water separator 4.1, differential pressure gauge 4.2, threeway 4.3; Data acquisition subsystem comprises computing machine 5.1, usb data line 5.2, capture card 5.3, the first cable 5.4a, the second cable 5.4b, the 3rd cable 5.4c, the 4th cable 5.4d, the 5th cable 5.4e, the 6th cable 5.4f, the 7th cable 5.4g; Temperature control subsystem 6 comprises Water Tank with Temp.-controlled 6.1, external circulating water pipe 6.2.Each parts concrete structure annexation is as follows:
Gas-water separation subsystem 4: threeway 4.3 one end are connected with differential pressure gauge 4.2; Another two ports of the threeway 4.3 respectively top and bottom of gas and water separator 4.1 connect; Gas and water separator 4.1 upper ends are connected with hydrophobic inner liner stainless steel pipe 3.7; Gas and water separator 4.1 upper ends are injected and are connected with the 9th threeway 2.5i of control subsystem 2 with fluid by stainless-steel tube 2.1.
Data acquisition subsystem 5: capture card 5.3 is connected with computing machine 5.1 by usb data line 5.2.
Temperature control subsystem 6: external circulating water pipe 6.2 is connected with Water Tank with Temp.-controlled 6.1.
The face that the second described porous gasket 3.3b contacts with sample 3.12, the second porous gasket fluid bore 3.5b inwall, the first-class body opening 3.6b of the second end cushion block inwall, hydrophobic internal lining pipe stainless-steel tube 3.7 inwalls are hydrophobic coating (being generally silication coating) surface.
Described pressure chamber 3.1, connection core clamping subsystem 3 all keep vertical placement with hydrophobic internal lining pipe stainless-steel tube 3.7, the gas and water separator 4.1 of gas-water separation subsystem 4.
Utilize the present invention to carry out the method that rock air water two-phase relative permeability measures as follows:
1, according to the present invention, manufacture sampler.
2, be ready to sample to be tested 3.12, and sample 3.12 is immersed in distilled water to 48 hours, make sample 3.12 fully saturated.
3, first end cushion block 3.4a, the first porous gasket 3.3a and sample 3.12 and the second porous gasket 3.3b, the second end cushion block 3.4b are fitly stacked together, encapsulant 3.13 is enclosed within around them, by first end cushion block 3.4a, the first porous gasket 3.3a and sample 3.12 and the second porous gasket 3.3b, the second end cushion block 3.4b tightly together with environmental sealing.
4, first end cushion block fluid bore 3.6a is injected and is connected 2.5b with the second threeway of control subsystem 2 with fluid by stainless-steel tube 2.1; The first-class body opening 3.6b of the second end cushion block is connected with the gas and water separator 4.1 in gas-water separation subsystem 4 by hydrophobic inner liner stainless steel pipe 3.7.
5, utilize confined pressure pump 3.8 by the second end cushion block second body opening 3.6c to pressure chamber 3.1 interior injection confined pressure liquid 3.2, utilize confined pressure liquid 3.2 pressurizations in confined pressure Beng3.8Gei pressure chamber 3.1, until interior confined pressure liquid 3.2 pressure in pressure chamber 3.1 reach experiment required pressure (being confined pressure).
6, open the valve 1.4 being connected with water container 1.2, to fluid, inject volume pump 2.2a and pour 10 milliliters of left and right distilled water, close the valve 1.4 being connected with water container 1.2; Open reduction valve 1.3, to fluid, inject the full gas of volume pump 2.2a punching; The water and the gas that allow fluid inject volume pump 2.2a reach wetting balance.
7, gas dosing pump 2.2b and fluid being set respectively, to inject volume pump 2.2a be constant voltage mode, and fluid injects volume pump 2.2a and to sample 3.12, injects fluids with the pressure of a little higher than gas dosing pump 2.2b, can carry out the relative permeability experiments of measuring of sample 3.12.
Claims (6)
1. a device of measuring porous medium air water two-phase relative permeability, this device comprises fluid source subsystem (1), fluid injects and control subsystem (2), core clamping subsystem (3), separating system for water (4), data acquisition subsystem (5) and temperature control subsystem (6), it is characterized in that: fluid source subsystem (1) is injected with the first filtrator (2.3a) in control subsystem (2) and is connected by stainless-steel tube (2.1) and fluid, fluid injects with control subsystem (2) and is connected with the first end cushion block (3.4a) in core clamping subsystem (3) by stainless-steel tube (2.1), the second end cushion block (3.4b) in core clamping subsystem (3) is connected with the gas and water separator (4.1) in gas-water separation subsystem (4) by hydrophobic inner liner stainless steel pipe (3.7), gas and water separator (4.1) in gas-water separation subsystem (4) is injected with the 9th threeway (2.5i) in control subsystem (2) and is connected by stainless-steel tube (2.1) and fluid, Water Tank with Temp.-controlled (6.1) in temperature control subsystem (6) is injected with the fluid injection volume pump temperature control chamber (2.10a) of control subsystem (2) and is connected with gas volume pump temperature control chamber (2.10b) with fluid respectively by external circulating water pipe (6.2), fluid injects with the fluid of control subsystem (2) and injects volume pump (2.2a), gas dosing pump (2.2b), pressure gauge (2.6), differential pressure gauge (2.7), pressure gauge (3.9) in core clamping subsystem (3) and the differential pressure gauge (4.2) in gas-water separation subsystem (4) are connected with the capture card (5.3) in data acquisition subsystem (5) by cable (5.4).
2. a kind of device of measuring porous medium air water two-phase relative permeability according to claim 1, it is characterized in that: described fluid injects with control subsystem (2) and comprises stainless-steel tube (2.1), fluid injects volume pump (2.2a), gas dosing pump (2.2b), filtrator (2.3), fluid injects volume pump temperature control chamber (2.10a), gas dosing pump temperature control chamber (2.10b), valve (2.4), threeway (2.5), pressure gauge (2.6), differential pressure gauge (2.7), vacuum pump (2.8), vacuum meter (2.9), the first filtrator (2.3a) is connected with the first valve (2.4a), the first valve (2.4a) injects volume pump (2.2a) with fluid and is connected, fluid injects volume pump (2.2a) and is connected with the second valve (2.4b), the second valve (2.4b) is connected with one end of the first threeway (2.5a), the other two ends of the first threeway (2.5a) are connected with one end of the second threeway (2.5b) with the first pressure gauge (2.6a) respectively, the other end of the second threeway (2.5b) is connected with the first end cushion block (3.4a) in core clamping subsystem (3) by stainless-steel tube (2.1), the 3rd end of the second threeway (2.5b) is connected with one end of the 3rd threeway (2.5c) by stainless-steel tube (2.1), the other end of the 3rd threeway (2.5c) connects the 3rd valve (2.4c), the 3rd end of the 3rd threeway (2.5c) is connected with one end of the 8th threeway (2.5h) by stainless-steel tube (2.1), the other end of the 8th threeway (2.5h) is connected with differential pressure gauge (2.7), the 3rd end of the 8th threeway (2.5h) is connected with one end of the 7th threeway (2.5g), the second end of the 7th threeway (2.5g) is connected with one end of the 9th threeway (2.5i), the other end of the 9th threeway (2.5i) is connected with the 3rd valve (2.4c), the 3rd end of the 9th threeway (2.5i) is connected with the gas and water separator (4.1) in gas-water separation subsystem (4) by stainless-steel tube (2.1), the 3rd end of the 7th threeway (2.5g) is connected with one end of the 6th threeway (2.5f), the other end of the 6th threeway (2.5f) is connected with the second pressure gauge (2.6b), the 3rd end of the 6th threeway (2.5f) is connected with the second filtrator (2.3b), the second filtrator (2.3b) is connected with the 4th valve (2.4d), the 4th valve (2.4d) is connected with gas dosing pump (2.2b), gas dosing pump (2.2b) is connected with the 5th valve (2.4e), the 5th valve (2.4e) is connected with one end of the 4th threeway (2.5d), the other end of the 4th threeway (2.5d) is connected with one end of the 5th threeway (2.5e), the 3rd end of the 4th threeway (2.5d) is connected with the 7th valve (2.4g), the second end of the 5th threeway (2.5e) is connected with vacuum meter (2.9), the 3rd end of the 5th threeway (2.5e) is connected with the 6th valve (2.4f), the 6th valve (2.4f) is connected with vacuum pump (2.8).
3. a kind of device of measuring porous medium air water two-phase relative permeability according to claim 1, it is characterized in that: core clamping subsystem (3) comprises pressure chamber (3.1), confined pressure liquid (3.2), the first porous gasket (3.3a), first end cushion block (3.4a), the first porous gasket fluid bore (3.5a), first end cushion block fluid bore (3.63a), hydrophobic inner liner stainless steel pipe (3.7), confined pressure pump (3.8), pressure gauge (3.9), threeway (3.10), valve (3.11), sample (3.12) two ends contact with the second porous gasket (3.3b) with the first porous gasket (3.3a) respectively, the first porous gasket (3.3a) and the pad of emptying aperture more than second (3.3b) respectively with first end cushion block (3.4a) with contact with the second end cushion block (3.4b), first end cushion block (3.4a), the first porous gasket (3.3a), sample (3.12), the second porous gasket (3.3b), the second end cushion block (3.4b) are by encapsulant (3.13) environmental sealing, first end cushion block fluid bore (3.6a) is injected and is connected with second threeway (2.5b) of control subsystem (2) with fluid by stainless-steel tube (2.1), the first-class body opening of the second end cushion block (3.6b) is connected with the gas and water separator (4.1) in gas-water separation subsystem (4) by hydrophobic inner liner stainless steel pipe (3.7), confined pressure pump (3.8) is connected with threeway (3.10), threeway (3.10) second ends are connected with pressure gauge (3.9), threeway (3.10) the 3rd end is connected with valve (3.11), valve (3.11) is connected with the second end cushion block second body opening (3.6c) by stainless-steel tube (2.1), and pressure chamber (3.1) are injected and are connected with the threeway 2.5b of control subsystem 2 with fluid by stainless-steel tube 2.1, pressure chamber 3.1 is connected with the gas and water separator (4.1) in gas-water separation subsystem (4) by hydrophobic inner liner stainless steel pipe (3.7).
4. a kind of device of measuring porous medium air water two-phase relative permeability according to claim 3, is characterized in that: the face that described the second porous gasket (3.3b) contacts with sample (3.12), the second porous gasket fluid bore (3.5b) inwall, the first-class body opening of the second end cushion block (3.6b) inwall, hydrophobic internal lining pipe stainless-steel tube (3.7) inwall are hydrophobic coating surface.
5. a kind of device of measuring porous medium air water two-phase relative permeability according to claim 3, is characterized in that: described pressure chamber (3.1), connect hydrophobic internal lining pipe stainless-steel tube (3.7), the vertical placement of gas and water separator (4.1) of core clamping subsystem (3) and gas-water separation subsystem (4).
6. a kind of device of measuring porous medium air water two-phase relative permeability according to claim 1, it is characterized in that: described gas-water separation subsystem (4) comprises gas and water separator (4.1), differential pressure gauge (4.2), threeway (4.3), threeway (4.3) one end is connected with differential pressure gauge (4.2), another two ports of threeway (4.3) the respectively top and bottom of gas and water separator (4.1) connect, gas and water separator (4.1) upper end is connected with hydrophobic inner liner stainless steel pipe (3.7), gas and water separator (4.1) upper end is injected and is connected with the 9th threeway (2.5i) of control subsystem (2) with fluid by stainless-steel tube (2.1).
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| CN104634694A (en) * | 2015-01-23 | 2015-05-20 | 山东科技大学 | Experimental device for measuring lost gas of heterogeneous sandstone in high speed gas injection process |
| CN104765973A (en) * | 2015-04-22 | 2015-07-08 | 西安石油大学 | Numerical simulation method applied to coalbed methane under mining conditions |
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