CN106501155A - Rock core gas liquid two purpose permeability test device and reservoir damage evaluation method - Google Patents
Rock core gas liquid two purpose permeability test device and reservoir damage evaluation method Download PDFInfo
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- CN106501155A CN106501155A CN201611037818.6A CN201611037818A CN106501155A CN 106501155 A CN106501155 A CN 106501155A CN 201611037818 A CN201611037818 A CN 201611037818A CN 106501155 A CN106501155 A CN 106501155A
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- 239000011435 rock Substances 0.000 title claims abstract description 113
- 230000035699 permeability Effects 0.000 title claims abstract description 77
- 239000007788 liquid Substances 0.000 title claims abstract description 65
- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 230000006378 damage Effects 0.000 title claims abstract description 21
- 238000011156 evaluation Methods 0.000 title claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 41
- 230000000007 visual effect Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000003556 assay Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 5
- 208000014674 injury Diseases 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000011109 contamination Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 238000009533 lab test Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 112
- 238000002474 experimental method Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000012224 working solution Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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
- 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
Abstract
The invention belongs to oil and gas development simulating lab test device and assessment technique field, and in particular to a kind of rock core gas liquid two purpose permeability test device and reservoir damage evaluation method.The device at least includes：Gas drive sampling device, it include gas drive air inlet module and gas drive feed liquor module；Visual core holding unit, which includes entrance point, the port of export, the first cock body and the second cock body；And the gas flowmeter connected with outlet pipe.The method measures the gas permeability K of rock core respectively by said apparatus1With the Gas Permeability of Cores K after pollution damage2, then the calculating for carrying out resume permeability rate and permeability injury rate.Technical scheme provided by the present invention can simultaneously the gas permeability and liquid flowing permeability of testing rock core and under the contamination of working fluid rock core resume permeability degree.The device simulation is strong, connects ingenious, simple structure, and easy to operate, stability is high, sturdy and durable.
Description
Technical field
The invention belongs to oil and gas development simulating lab test device and assessment technique field, and in particular to a kind of rock core gas-liquid
Dual-purpose permeability test device and reservoir damage evaluation method.
Background technology
In developing of reservoirs, working solution (such as drilling fluid, completion fluid, fracturing fluid etc.) usually can cause to hinder to reservoir
Evil, causes the reduction of reservoir permeability, so as to affect the raising of oil and gas production.Simulation working solution to the pollution course of reservoir and
Evaluate reservoir permeability extent of injury, to oil-gas mining and reservoir protection, there is certain directive significance and reference.
Testing rock core permeability experimental provision was substantially that measuring gas permebility device and liquid flowing permeability are surveyed in the past
Trial assembly is put, and often the two is two separate covering devices.For same rock core, need to be tested with two covering devices respectively, taking out
During rock core is loaded, the inevitable damage and the change of experiment condition of rock core, the opposing party is on the one hand caused
Face causes experimental period and cost to greatly increase.This device can make same rock core measure gas infiltration in the same apparatus respectively
Rate and Test Liquid Permeability of Core, and then evaluate permeability injury and the recovery extent of rock core.
Chinese patent application CN201110368838 discloses a kind of measuring device for gas permeability of coal rock core, mainly by
High-pressure air source module, core holding unit module, ring pressure load-on module, data metering module, vacuum process module composition, by pin
Type valve is connected, and the high-pressure air source module includes gas cylinder, pressure-reducing valve, buffer container；The core holding unit module is rock
Heart clamp holder；The ring pressure load-on module is hand pump；The data metering module include precision pressure gauge and precision pressure gauge,
Soap bubble flowmeter；The vacuum process module is vavuum pump.Although the device is easy to operate, measurement data is reproducible, experiment
Error is little, low cost, it is adaptable to gas permeability of coal rock core and equivalent liquid permeability field tests, but can be only done rock
A kind of heart gas permeability this measurement of core permeability.Chinese patent application 201610134362.9 discloses a kind of air water two
Phase effective permeability accurately determines new equipment and method, and the device includes constant pressure source of the gas, water constant speed micro pump, pressure gauge, clamping
Device cylinder, rock core, steel cylinder, rubber case, the gentle meter of water meter, the constant pressure source of the gas, pressure gauge, clamper cylinder,
Rock core, rubber case, the gentle meter of water meter are sequentially connected.Present invention also offers a kind of air water two-phase effective permeability essence
Really determine new method, although exclude test fluid between rock sample side surface and sealing shroud gap by making to test result
Into interference, to more accurate by the flow measurement of core fluids, computing permeability result is more reliable, but which is mainly improving essence
In exactness, applicable surface still has limitation.
Content of the invention
For solving the deficiencies in the prior art, the invention provides a kind of rock core gas liquid two purpose permeability test device and reservoir
Damage evaluation method.Technical scheme provided by the present invention can be while the gas permeability and liquid flowing infiltration of testing rock core
Rate and under the contamination of working fluid rock core resume permeability degree.The device simulation is strong, connects ingenious, simple structure, behaviour
Facilitate, stability is high, sturdy and durable.
Technical scheme provided by the present invention is as follows：
A kind of rock core gas liquid two purpose permeability test device, at least includes：
Gas drive sampling device, the gas drive sampling device include gas drive air inlet module and gas drive feed liquor module；
Visual core holding unit, the visual core holding unit include that entrance point and the port of export, the entrance point are provided with
First cock body, first cock body are provided with admission line, and the port of export is provided with the second cock body, and second cock body is arranged
There is outlet pipe, the gas drive air inlet module and the gas drive feed liquor module are respectively communicated with the admission line；
And the gas flowmeter connected with the outlet pipe.
Visual core holding unit has transparent housing, can observe that liquid flows through the phenomenon of rock core, intuitively reflect
The contaminated process of rock core.
Specifically：
The gas drive air inlet module includes the first source of the gas, air accumulator and the first heater being sequentially communicated, described first
Heater connects the admission line；
The gas drive feed liquor module includes the second source of the gas, fluid reservoir and the secondary heating mechanism being sequentially communicated, described second
Heater connects the admission line.
Further, first source of the gas is same gas source bottle with second source of the gas；The first heater and institute
Secondary heating mechanism is stated for same heater.Gas source bottle provides the gas such as nitrogen or methane, according to experiment adjustment.
Further, liquid-collecting bottle is provided between the outlet pipe and the gas flowmeter；
The rear end of the gas flowmeter is provided with gas collection bottle, the gas collection bottle is respectively communicated with described visual
Core holding unit and the air accumulator.
Further, the gas drive sampling device also includes the first triplate line, the second triplate line, the 3rd three-way pipe
Road, the 4th triplate line, the 5th triplate line and the 6th triplate line, the air accumulator include air inlet and gas outlet, described
Fluid reservoir includes inlet and liquid outlet, wherein：
The a port of first triplate line connects the gas source bottle, second end of first triplate line
The live end of the mouth connection visual core holding unit, the 3rd port of first triplate line is respectively communicated with the air inlet
Mouth and the inlet,；
The a port of second triplate line connects the gas outlet, second end of second triplate line
The a port of mouth connection the 3rd triplate line；
Second port of the 3rd triplate line connects the upper end of the fluid reservoir, and the of the 3rd triplate line
Three ports connect a port of the 4th triplate line；
Second port of the 4th triplate line connects the liquid outlet, the 3rd end of the 4th triplate line
The mouth connection heater, the heater connect the admission line of the visual core holding unit；
The a port of the 5th triplate line connects the outlet pipe of the visual core holding unit, and the described 5th
Second port of triplate line connects the liquid-collecting bottle, and the 3rd port of the 5th triplate line connects the gas stream
Gauge；
The a port of the 6th triplate line connects the 3rd port of second triplate line, and the described 6th
Second port of triplate line connects the pressure side of unloading of the visual core holding unit, the 3rd end of the 6th triplate line
The mouth connection gas collection bottle.
Further, second port of first triplate line is communicated with confined pressure control valve, the confined pressure control valve
Connect the live end of the visual core holding unit；
3rd port of first triplate line is communicated with inlet-pressure force control valve, the inlet-pressure force control valve point
The air inlet and the inlet are not connected；
3rd port of second triplate line is communicated with the first relief valve, the first relief valve connection described the
The a port of six triplate lines；
Second port of the 6th triplate line is communicated with the second relief valve, and the second relief valve connection is described can
Pressure side is unloaded depending on core holding unit.
Further, the first air pressure is provided between a port of the gas source bottle and first triplate line
Table；
It is provided between the inlet end and the inlet-pressure force control valve of the parallel connection of the air accumulator and the fluid reservoir
Second air gauge；
The 3rd air gauge is provided between the live end of the confined pressure control valve and the visual core holding unit.
Further, first switch is provided between the gas source bottle and first air gauge；
Second switch is provided between the inlet end and the air inlet of the parallel connection of the air accumulator and the fluid reservoir；
The 3rd switch is provided between the inlet end and the inlet of the parallel connection of the air accumulator and the fluid reservoir；
The 4th switch is provided between a port of the gas outlet and second triplate line；
The is provided with the pipeline for connecting the upper end of the fluid reservoir and second port of the 3rd triplate line
Five switches；
The 6th switch is provided between second port of the liquid outlet and the 4th triplate line；
The 3rd in the 5th triplate line is provided with the 7th switch between port and the gas flowmeter；
The 8th switch is provided directly with second port of the 5th triplate line and the liquid-collecting bottle；
Arrange between the 3rd port of the 3rd triplate line and a port of the 4th triplate line
There is the 9th switch.
It should be noted that being directed to above-mentioned each triplate line, for the ease of description, the port description of source of the gas side is will be close to
For a port, the port that will be far from source of the gas side is described as the 3rd port, by a port and the 3rd port it
Between port be described as second port.
Present invention also offers a kind of reservoir damage evaluation method, comprises the following steps：
1) gas permeability is carried out to rock core with the rock core gas liquid two purpose permeability test device described in claim 7 or 8
Measure, and calculate the gas permeability of rock core, be designated as K1；
2) with the Liquid Penetrant of the rock core gas liquid two purpose permeability test device testing rock core described in claim 7 or 8
The method of rate carries out pollution damage to rock core；
3) with the rock core gas liquid two purpose permeability test device described in claim 7 or 8 to step 2) after pollution damage
Rock core carries out the measure of gas permeability, and calculates the gas permeability of rock core, is designated as K2；
4) K is calculated2/K1× 100%, obtain the resume permeability rate of rock core；Calculate (1-K2/K1) × 100%, is oozed
Saturating rate injury rate.
Specifically, the assay method of the gas permeability of rock core is comprised the following steps：
1) each switch, confined pressure control valve, inlet-pressure force control valve and each relief valve are closed；
2) load rock core in visual core holding unit, fill in the first cock body and the second cock body is fixed to rock core；
3) first switch is opened, there is provided air pressure；
4) confined pressure control valve is adjusted, applies confined pressure to rock core；
5) inlet-pressure force control valve is adjusted to fixation pressure, open second switch, the 4th switch, the 9th switch and the 7th and open
Close, experimental gas are allowed by rock core, adjust heater and set experimental temperature；
6) inlet pressure numerical value is read by second pressure table 5, and outlet pressure is atmospheric pressure, exit gas flow number by
Gas flowmeter reads, and the length of rock core and sectional area measurement are obtained, public by the correction darcy for being suitable for measuring gas permebility
Formula calculates the gas permeability of rock core.
Specifically, the assay method of the Test Liquid Permeability of Core of rock core is comprised the following steps：
1) each switch, confined pressure control valve, inlet-pressure force control valve and each relief valve are closed；
2) testing liquid is loaded fluid reservoir, loads rock core in visual core holding unit, fill in the first cock body and second
Cock body is fixed to rock core；
3) first switch is opened, there is provided air pressure；
4) confined pressure control valve is adjusted, confined pressure is applied to rock core；
5) inlet-pressure force control valve is adjusted to fixation pressure, open the 3rd switch, the 6th switch and the 8th switch, allow gas
Displacement prepare liquid is adjusted heater and is set experimental temperature by rock core；
6) inlet pressure numerical value is read by second pressure table 5, and outlet pressure is atmospheric pressure, and liquid flow exit is by meter
When and liquid-collecting bottle in liquid volume calculate obtain, the length of rock core and sectional area measurement are obtained, and are calculated by darcy flow formula
Go out the Test Liquid Permeability of Core of rock core.
Compare prior art, and the present invention has advantages below：
1st, the purpose of testing rock core gas permeability and Test Liquid Permeability of Core, operation letter can be realized under the conditions of same device
Single, save experimental period, it is to avoid the rock core damage for causing separately tested by two sets instruments.
2nd, in this device, core holding unit is visual, can observe that liquid flows through the phenomenon of rock core, intuitively reflects rock core
Contaminated process.
3rd, there is heating constant-temperature equipment, test liquid under certain temperature conditions or gas permeability can be realized.
4th, experimental gas are nitrogen, can be emitted into air, if methane etc. to the unfriendly gas of environment, then can lead to
Cross gas collector and collect experimental gas.
Description of the drawings
Fig. 1 is the structural representation of rock core gas liquid two purpose permeability test device provided by the present invention.
In accompanying drawing 1, the structure list representated by each label is as follows：
1st, gas source bottle, 2, first switch, the 3, first air gauge, 4, inlet-pressure force control valve, the 5, second air gauge, 6, second
Switch, the 7, air accumulator, the 8, the 4th switch, the 9, the 3rd switch, 10, fluid reservoir, the 11, the 6th switch, 12, visual core holding unit,
13rd, the first cock body, the 14, second cock body, 15, rock core, 16, confined pressure control valve, the 17, first triplate line, the 18, the 3rd air gauge,
19th, the 7th switch, the 20, the 8th switch, 21, liquid-collecting bottle, 22, gas flowmeter, 23, gas collection bottle, 24, heater, 25, the
One relief valve, the 26, the 5th switch, the 27, the 9th switch, the 28, second relief valve.
Specific embodiment
Hereinafter the principle and feature of the present invention are described, illustrated embodiment is served only for explaining the present invention, is not intended to
Limit the scope of the present invention.
In a detailed embodiment, as shown in figure 1, a kind of rock core gas liquid two purpose permeability test device, including gas
Drive sampling device, visual core holding unit 12, liquid-collecting bottle 21, gas flowmeter 22 and gas receiving flask 23.Visual rock core clamping
Device 12 includes that entrance point and the port of export, entrance point are provided with the first cock body 13, and the first cock body 13 is provided with admission line, the port of export
The second cock body 14 is provided with, the second cock body 14 is provided with outlet pipe.In visual core holding unit 12, rock core 15 is set.
Gas drive sampling device includes gas source bottle 1, first switch 2, the first air gauge 3, the first triplate line 17, inlet pressure
Control valve 4, the second air gauge 5, second switch 6, the 8, the 3rd switch 9, fluid reservoir the 10, the 6th of the switch of air accumulator the 7, the 4th are switched
11st, the second triplate line, the 3rd triplate line, the 4th triplate line, the switch of heater the 24, the 5th 26 and the 9th switch 27.
Gas source bottle 1, first switch 2, the first air gauge 3, the first triplate line 17 and inlet-pressure force control valve 4 and set successively
Put.Inlet-pressure force control valve 4 has been respectively communicated with second switch 6 and the 3rd switch 9.Second switch 6 connects air accumulator 7, air accumulator 7
The 4th switch 8 is connected, the 4th switch 8 connects a port of the second triplate line.
3rd switch 9 connects fluid reservoir 10, and the 6th switch 11 of the connection of fluid reservoir 10, the 6th switch 11 connect the 4th three-way pipe
Second port on road.
In addition, the 5th switch 26 of upper end connection of fluid reservoir 10, second of 26 the 3rd triplate line of connection of the 5th switch
Port.
Second port of the second triple valve, a port of the 3rd threeway, the 3rd port of the 3rd triple valve,
3rd port, heater 24 and inlet pipeline of four triple valves is sequentially communicated.
Inlet pipeline connects a port of the 5th triplate line, second port connection the 8th of the 5th triplate line
Switch 20, the 8th switch 20 connect liquid-collecting bottle 21.3rd the 7th switch 19 of port connection of the 5th triplate line, the 7th switch
19 connection gas flowmeters 22.The connection gas collection of gas flowmeter 22 bottle 23, gas collection bottle 23 connects the 6th triplate line
The 3rd port.Second port of the 6th triplate line connects the second relief valve 28, and the second relief valve 28 connects visual rock
The pressure relieving end of heart clamp holder 12.The a port of the 6th triplate line connects the first relief valve 25, and the first relief valve 25 is connected
3rd port of the second triplate line.The a port of the 3rd port of the 3rd triplate line and the 4th triplate line it
Between arrange the 9th switch 27.
First air gauge 3 is set between first switch and the first triplate line 17.The is arranged after inlet-pressure force control valve 4
Two air gauges 5.Second port connection confined pressure control valve 16 of the 17 of the first triplate line, confined pressure control valve 16 and visual rock core
Setting, the 3rd air gauge 18 between the live end of clamper 12.
In said apparatus
Gas source bottle 1, can be the gas such as nitrogen or methane, depending on being needed according to experiment；
First switch 2, controls gas source switch；
First air gauge 3, shows bleed pressure；
Inlet-pressure force control valve 4, the pressure in control entrance air accumulator 7 and fluid reservoir 10；
Second air gauge 5, shows access into the pressure in air accumulator 7 and fluid reservoir 10；
Second switch 6, between inlet-pressure force control valve 4 and air accumulator 7 on pipeline, controls the pressure of air accumulator 7；
Air accumulator 7, the inside gas are the gas in source of the gas 1；
4th switch 8, between air accumulator 7 and the first cock body of clamper 13 on pipeline, controls air accumulator gas
Inlet pressure；
3rd switch 9, between inlet-pressure force control valve 4 and fluid reservoir 10 on pipeline, controls the pressure of fluid reservoir 10
Power；
Fluid reservoir 10, such as built-in experiment prepare liquid, clear water, drilling fluid etc.；
6th switch 11, between air accumulator 10 and the first cock body of clamper 13 on pipeline, controls fluid reservoir gas
Inlet pressure；
Visual core holding unit 12, clamper are made up of outer rigid housing and inner balloon, can pass through to control confined pressure valve 16
The confined space for making gas enter between outer rigid housing and air bag, so as to apply confined pressure to clamp rock core, this clamper is transparent
Material is made；
First cock body 13 and the second cock body 14, the first cock body 13 and the second cock body can be inserted respectively at 12 two ends of clamper
Enter clamper so as to fixed rock core；
Rock core 15, is mounted in clamper, is natural core or artificial core；
Confined pressure control valve 16, adjusts rock core circumferential pressure by adjusting confined pressure control valve；
First triplate line 17, is connected with source of the gas steel cylinder 1,7/ fluid reservoir 10 of air accumulator, clamper 12, respectively by source of the gas steel
Bottle provides gas, adjusts output pressure size by inlet-pressure force control valve 4 and confined pressure control valve 18；
3rd air gauge 18, shows rock core confined pressure size；
7th switch 19, on the pipeline between the second cock body 14 and gas flowmeter 22；
8th switch 20, on the second cock body drain pipe road, control liquid flows out；
Liquid-collecting bottle 21, collects the liquid for flowing out, can read liquid volume；
Gas flowmeter 22, readable go out gas by when flow；
Gas collector 23, the gas collection in the gas and air accumulator that will can pass through from gas flowmeter；
Heater 24, is mounted on the pipeline of the first cock body of connection, is the gas/liquid heating for entering clamper, can show
Temperature value；
First relief valve 25, for releasing pressure in air accumulator 7 and fluid reservoir 10；
5th switch 26, is mounted on the pipeline of connection 10 tank mouth of fluid reservoir and the first cock body；
9th switch fills 27 on the pipeline of connecting valve 26 and switch 11；
Second relief valve 28, for releasing clamper confined pressure.
To be metal tubes connection between upper-part.
Embodiment
Measuring gas permebility method and steps：
1 experiment ensures before starting that all switches, control valve and relief valve are closed.
2 load rock core in visual core holding unit 12, and the first cock body 13 of insertion and the second cock body 14 fix it.
3 open first switch 2, there is provided air pressure.
4 adjust confined pressure control valve 16, apply certain confined pressure to rock core.
5 adjust inlet-pressure force control valve 4 to fixation pressure, open the 6, the 4th switch the 8, the 9th of air accumulator switch and switch 27 and
7th switch 19, allows experimental gas to pass through rock core.Adjust heater 24 and set experimental temperature.
6 inlet pressure numerical value are read by the second air gauge 5, and exit gas flow number is read by gas flowmeter 22,
Outlet pressure is atmospheric pressure, and the length of rock core and sectional area can be surveyed, and calculate rock core so as to pass through Darcy's law correction formula
Gas permeability.
After 7 experiments are finished, first switch 2, the 19, the 9th switch 27, inlet pressure control of the switch of second switch the 6, the 7th is closed
Valve processed 4 and confined pressure control valve 16.The gas that relief valve 25 is discharged in air accumulator 7 is opened, the 4th switch 8 and relief valve is closed afterwards
25, open relief valve 28 and release the confined pressure on clamper 12.
Test Liquid Permeability of Core method of testing and step：
1 experiment ensures before starting that all switches, control valve and relief valve are closed.
Testing liquid is loaded fluid reservoir 10 by 2；Load rock core in visual core holding unit 12, insert 13 He of the first cock body
Second cock body 14 fixes it.
3 open first switch 2, there is provided air pressure.
4 adjust confined pressure control valve 16, apply certain confined pressure to rock core.
5 adjust inlet-pressure force control valve 4 to fixation pressure, open the 9, the 6th switch 11 of the 3rd switch of storage and the 8th switch
20, allow gas displacement prepare liquid to pass through rock core.Adjust heater 24 and set experimental temperature.
6 inlet pressure numerical value are read by the second air gauge 5, and liquid flow exit is by liquid in timing and liquid-collecting bottle 21
Volume is calculated, and outlet pressure is atmospheric pressure, and the length of rock core and sectional area can be surveyed, be calculated so as to pass through darcy flow formula
Go out the Test Liquid Permeability of Core of rock core.
After 7 experiments are finished, the 9, the 6th switch 11 of the switch of first switch the 2, the 3rd, switch 20, inlet-pressure force control valve 4 is closed
With confined pressure control valve 16.The gas that relief valve 25 and the 5th switch 26 are discharged in fluid reservoir 10 is opened, the 5th is closed afterwards and is switched
26 and relief valve 25, open relief valve 28 and lay down the confined pressure in clamper 12.Finally remaining testing liquid in fluid reservoir is poured out.
Core permeability damage experiment：
The 1 gas permeability K1 for measuring rock core.
2 carry out pollution damage with prepare liquid to rock core by the method for testing rock core Test Liquid Permeability of Core.
The 3 gas permeability K2 for measuring rock core again.
The resume permeability rate of 4 rock cores is K2/K1× 100%, permeability injury rate is (1-K2/K1) × 100%.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements that is made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of rock core gas liquid two purpose permeability test device, it is characterised in that at least include：
Gas drive sampling device, the gas drive sampling device include gas drive air inlet module and gas drive feed liquor module；
Visual core holding unit (12), described visual core holding unit (12) include that entrance point and the port of export, the entrance point set
The first cock body (13) is equipped with, the first cock body (13) are provided with admission line, and the port of export is provided with the second cock body (14),
Second cock body (14) are provided with outlet pipe, and the gas drive air inlet module and the gas drive feed liquor module are respectively communicated with described
Admission line；
And the gas flowmeter (22) connected with the outlet pipe.
2. rock core gas liquid two purpose permeability test device according to claim 1, it is characterised in that：
The gas drive air inlet module includes the first source of the gas, air accumulator (7) and the first heater being sequentially communicated, and described first adds
Thermal connects the admission line；
The gas drive feed liquor module includes the second source of the gas, fluid reservoir (10) and the secondary heating mechanism being sequentially communicated, described second
Heater connects the admission line.
3. rock core gas liquid two purpose permeability test device according to claim 2, it is characterised in that：First source of the gas with
Second source of the gas is same gas source bottle (1)；The first heater is same heater with the secondary heating mechanism
(24).
4. rock core gas liquid two purpose permeability test device according to claim 3, it is characterised in that：
Liquid-collecting bottle (21) is provided between the outlet pipe and the gas flowmeter (22)；
Gas flowmeter (22) are also connected with gas collection bottle (23), and gas collection bottle (23) are also respectively communicated with described
Visual core holding unit (12) and the air accumulator (7).
5. rock core gas liquid two purpose permeability test device according to claim 4, it is characterised in that：The gas drive sample introduction dress
Put
With the 6th triplate line, described air accumulator (7) include that air inlet and gas outlet, described fluid reservoir (10) include inlet and go out liquid
Mouthful, wherein：
The a port of the first triplate line (17) connects gas source bottle (1), the first triplate line (17)
Second port connects the live end of visual core holding unit (12), the 3rd port of the first triplate line (17)
The air inlet and the inlet is respectively communicated with,；
The a port of second triplate line connects the gas outlet, and second port of second triplate line connects
Lead to a port of the 3rd triplate line；
Second port of the 3rd triplate line connects the upper end of fluid reservoir (10), and the of the 3rd triplate line
Three ports connect a port of the 4th triplate line；
Second port of the 4th triplate line connects the liquid outlet, and the 3rd port of the 4th triplate line connects
Lead to heater (24), described heater (24) connect the admission line of visual core holding unit (12)；
The outlet pipe of a port connection visual core holding unit (12) of the 5th triplate line, the described 5th
Second port of triplate line connects liquid-collecting bottle (21), and the 3rd port of the 5th triplate line connects the gas
Flowmeter body (22)；
The a port of the 6th triplate line connects the 3rd port of second triplate line, the 6th threeway
Second port of pipeline connects the pressure side of unloading of visual core holding unit (12), the 3rd end of the 6th triplate line
Mouth connects gas collection bottle (23).
6. rock core gas liquid two purpose permeability test device according to claim 5, it is characterised in that：
Second port of the first triplate line (17) is communicated with confined pressure control valve (16), and described confined pressure control valve (16) connect
Lead to the live end of visual core holding unit (12)；
3rd port of the first triplate line (17) is communicated with inlet-pressure force control valve (4), the inlet pressure control
Valve (4) is respectively communicated with the air inlet and the inlet；
3rd port of second triplate line is communicated with the first relief valve (25), and described first relief valve (25) connect institute
State a port of the 6th triplate line；
Second port of the 6th triplate line is communicated with the second relief valve (28), and described second relief valve (28) connect institute
That states visual core holding unit (12) unloads pressure side.
7. rock core gas liquid two purpose permeability test device according to claim 6, it is characterised in that：
The first air gauge (3) is provided between a port of the gas source bottle (1) and first triplate line (17)；
Between the inlet end of the parallel connection of the air accumulator (7) and the fluid reservoir (10) and inlet-pressure force control valve (4)
It is provided with the second air gauge (5)；
The 3rd air gauge is provided between the live end of the confined pressure control valve (16) and the visual core holding unit (12)
(18).
8. rock core gas liquid two purpose permeability test device according to claim 7, it is characterised in that：
First switch (2) is provided between the gas source bottle (1) and first air gauge (3)；
Second is provided between the inlet end and the air inlet of the parallel connection of the air accumulator (7) and the fluid reservoir (10) to open
Close (6)；
The 3rd is provided between the inlet end and the inlet of the parallel connection of the air accumulator (7) and the fluid reservoir (10) to open
Close (9)；
The 4th switch (8) is provided between a port of the gas outlet and second triplate line；
The is provided with the pipeline of second port of the upper end and the 3rd triplate line for connecting fluid reservoir (10)
Five switches (26)；
The 6th switch (11) is provided between second port of the liquid outlet and the 4th triplate line；
The 7th switch (19) is provided between the 3rd port of the 5th triplate line and the gas flowmeter (22)；
The 8th switch (20) is provided directly with second port of the 5th triplate line and the liquid-collecting bottle (21)；
Is provided between the 3rd port of the 3rd triplate line and a port of the 4th triplate line
Nine switches (27).
9. a kind of reservoir damage evaluation method, it is characterised in that comprise the following steps：
1) measure of gas permeability is carried out to rock core with the rock core gas liquid two purpose permeability test device described in claim 8,
And the gas permeability of rock core is calculated, it is designated as K1；
2) in the method for the Test Liquid Permeability of Core of the rock core gas liquid two purpose permeability test device testing rock core described in claim 8
Pollution damage is carried out to rock core；
3) with the rock core gas liquid two purpose permeability test device described in claim 8 to step 2) rock core after pollution damage carries out
The measure of gas permeability, and the gas permeability of rock core is calculated, it is designated as K2；
4) K is calculated2/K1× 100%, obtain the resume permeability rate of rock core；Calculate (1-K2/K1) × 100%, obtains permeability wound
Evil rate.
10. reservoir damage evaluation method according to claim 9, it is characterised in that：
The assay method of the gas permeability of rock core is comprised the following steps：
1) each switch, confined pressure control valve (16), inlet-pressure force control valve (4) and each relief valve are closed；
2) load rock core in visual core holding unit (12), filling in the first cock body (13) and the second cock body (14) is carried out to rock core
Fixed；
3) first switch (2) is opened, there is provided air pressure；
4) confined pressure control valve (16) is adjusted, applies confined pressure to rock core；
5) inlet-pressure force control valve (4) is adjusted to fixation pressure, open second switch (6), the 4th switch (8), the 9th switch
(27) and the 7th switch (19), allow experimental gas by rock core, adjust heater (24) and set experimental temperature；
6) inlet pressure numerical value is read by second pressure table 5, and outlet pressure is atmospheric pressure, and exit gas flow number is by gas
Flowmeter (22) reads, and the length of rock core and sectional area measurement are obtained, public by the correction darcy for being suitable for measuring gas permebility
Formula calculates the gas permeability of rock core；
The assay method of the Test Liquid Permeability of Core of rock core is comprised the following steps：
1) each switch, confined pressure control valve (16), inlet-pressure force control valve (4) and each relief valve are closed；
2) testing liquid is loaded fluid reservoir (10), loads rock core in visual core holding unit (12), fill in the first cock body
(13) and the second cock body (14) is fixed to rock core；
3) first switch (2) is opened, there is provided air pressure；
4) confined pressure control valve (16) is adjusted, confined pressure is applied to rock core；
5) inlet-pressure force control valve (4) is adjusted to fixation pressure, open the 3rd switch (9), the 6th switch (11) and the 8th switch
(20) gas displacement prepare liquid, is allowed by rock core, adjust heater (24) and set experimental temperature；
6) inlet pressure numerical value is read by second pressure table 5, and outlet pressure is atmospheric pressure, liquid flow exit by timing and
In liquid-collecting bottle (21), liquid volume is calculated and is obtained, and the length of rock core and sectional area measurement are obtained, and are calculated by darcy flow formula
Go out the Test Liquid Permeability of Core of rock core.
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| CN201611037818.6A CN106501155A (en) | 2016-11-23 | 2016-11-23 | Rock core gas liquid two purpose permeability test device and reservoir damage evaluation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611037818.6A CN106501155A (en) | 2016-11-23 | 2016-11-23 | Rock core gas liquid two purpose permeability test device and reservoir damage evaluation method |
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| CN201611037818.6A Pending CN106501155A (en) | 2016-11-23 | 2016-11-23 | Rock core gas liquid two purpose permeability test device and reservoir damage evaluation method |
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| CN112924361A (en) * | 2021-02-22 | 2021-06-08 | 绍兴文理学院 | Rock gas permeation detects uses permeability survey device |
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