CN103743661A - Rock permeability test device - Google Patents
Rock permeability test device Download PDFInfo
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- CN103743661A CN103743661A CN201410014390.8A CN201410014390A CN103743661A CN 103743661 A CN103743661 A CN 103743661A CN 201410014390 A CN201410014390 A CN 201410014390A CN 103743661 A CN103743661 A CN 103743661A
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Abstract
The invention provides a rock permeability test device. The rock permeability test device comprises a test system which comprises a rock core clamper, a pressurizing device and a first cavity, wherein a rock core is clamped in the rock core clamper; the rock core clamper is provided with an inlet end and an outlet end; the inlet end is connected with an air cylinder; the pressurizing device is connected with the rock core clamper; one end of the first cavity is connected with the outlet end of the rock core clamper, and the other end of the first cavity is connected with a second cavity. The rock permeability test device disclosed by the invention can measure the permeability of rocks with any permeability, and the test range is wide.
Description
Technical field
The present invention is relevant for a kind of proving installation, especially relevant for a kind of rock permeability proving installation of oil and gas exploratory development technical field.
Background technology
Permeability is the parameter that characterizes soil or rock conduction gas ability.In petroleum and natural gas Exploration Domain, permeability is for evaluating the important indicator of the stratum quality that contains oil or rock gas.
Existing conventional permeability method of testing is mainly steady state method and pulse attenuation method.Wherein, the process of steady state method testing rock core percolation ratio is: allow the upstream and downstream end of Sandstone Cores under stable pressure reduction, gas can form stable flow velocity during by rock core, measures within a certain period of time gas by the volume of rock core, and further calculating just can draw permeability.Because nanoscale hole in the compacted rocks such as shale, coal and tight sand is grown, porosity and permeability is extremely low, be difficult to form stable flow velocity under stable pressure reduction, therefore, steady state method is not suitable for the permeability test of compacted rock.
The process of pulse attenuation method testing rock core percolation ratio is: adopt clamper to fix in rock core, upstream extremity at clamper is connected respectively a cavity that volume is fixing with downstream end, then to injecting gas in clamper to reach the pressure equilibrium of clamper upstream extremity and downstream end, now, in the cavity of clamper upstream extremity, increase certain pressure, in the cavity of clamper downstream end, reduce certain pressure, gas in clamper upstream extremity cavity starts to spread in rock core, its cavity internal pressure declines, gas in rock core spreads in the cavity of clamper downstream end, clamper downstream end cavity internal pressure rises, now, according to the rise and fall of clamper downstream end cavity internal pressure, can calculate the permeability of rock.In order to meet, measure the most widely needs, the volume of clamper downstream end cavity is often larger, when measuring the permeability of common rocks, the gas of clamper upstream extremity can comparatively fasterly pass through rock core, pressure in clamper downstream end cavity can be changed, yet for the lower rock of permeability, more small being difficult to of the pressure of clamper downstream end cavity variation found, and then is difficult to accurately record permeability.
Therefore, be necessary to provide a kind of new permeability proving installation, overcome above-mentioned defect.
Summary of the invention
The object of this invention is to provide a kind of rock permeability proving installation, it can measure the permeability of any permeability rock, and its test specification is wide.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides a kind of rock permeability proving installation, described rock permeability proving installation comprises test macro, and described test macro comprises: core holding unit, is folded with rock core in it, described core holding unit has inlet end and endpiece, and described inlet end is connected with cylinder; Pressue device, it is connected with described core holding unit; The first cavity, its one end is connected with the endpiece of described core holding unit, and its other end is connected with the second cavity.
Preferably, the volume of described the first cavity is less than the volume of described the second cavity.
Preferably, the volume of described the first cavity is 50～100 milliliters, and the volume of described the second cavity is 500～1000 milliliters.
Preferably, between described the first cavity and described the second cavity, be provided with the first valve.
Preferably, on described core holding unit, be connected in parallel to the second valve.
Preferably, between described cylinder and the inlet end of described core holding unit, be connected with the 3rd valve.
Preferably, between the endpiece of described core holding unit and described the first cavity, be connected with the 4th valve.
Preferably, between described pressue device and described core holding unit, between described the first cavity and described core holding unit and be respectively arranged with pressure transducer between described cylinder and described core holding unit.
Preferably, described rock permeability proving installation also comprises air supply system, and described air supply system comprises gas cylinder, and described gas cylinder is connected with the inlet end of described core holding unit.
Preferably, described rock permeability proving installation also comprises data Collection & Processing System, and described data Collection & Processing System comprises computing machine, and described computing machine is connected with described test macro by data line.
Feature and the advantage of rock permeability proving installation of the present invention are: this rock permeability proving installation is provided with the first cavity and the second cavity, when measuring the permeability of rock core of low-permeability, only use the first cavity of small size, small volume due to the first cavity, its internal pressure is obvious with the volume change of gas, the pressure variation of the first cavity is easily found, so that measurement data is accurate.When measuring the permeability of high permeability rock core, can adopt the second cavity of large volume to test, the test that can meet common rock core is used; In addition, by closing the 4th valve being arranged between core holding unit and the first cavity, can test the rock core percolation ratio that permeability is extremely low.This rock permeability proving installation of the present invention, can effectively solve the permeability test problem of high permeability rock, low-permeability rock and utmost point low-permeability rock.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of rock permeability proving installation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the invention provides a kind of rock permeability proving installation, it is for the permeability of testing rock core.Core permeability proving installation comprises test macro 110.Test macro 110 comprises core holding unit 20, is folded with rock core 10 in it, and core holding unit 20 has inlet end 21 and endpiece 23, and inlet end 21 is connected with cylinder 30; Pressue device 40, it is connected with core holding unit 20; The first cavity 50, its one end is connected with the endpiece 23 of core holding unit 20, and its other end is connected with the second cavity 60.
Specifically, be folded with piston-shaped sample rock core 10 in core holding unit 20, inlet end 21 and the endpiece 23 of core holding unit 20 are connected.Extraneous gas enters endpiece 23 from core holding unit 20 after the rock core 10 of sandwiched in it from the inlet end 21 of core holding unit 20 and flows out.
Pressue device 40 is connected with core holding unit 20, and it applies certain confined pressure for the rock core 10 in core holding unit 20, the pressure state with simulation core 10 in stratum.In the present invention, in pressue device 40, be provided with confined pressure liquid, by this confined pressure liquid realization, to the rock core 10 in core holding unit 20, apply the object of confined pressure.In the present embodiment, between pressue device 40 and core holding unit 20, be provided with pressure transducer 27, this pressure transducer 27 is for the size of monitoring pressure device 40 confined pressure that applies.
Cylinder 30 is connected with core holding unit 20, it comprises cylinder body 31 and piston 33, wherein, cylinder body 31 is connected with the inlet end 21 of core holding unit 20, piston 33 is arranged in cylinder body 31 movably, the moving axially in cylinder body 31 according to piston 33, and the gas in cylinder body 31 enters from core holding unit 20 inlet ends 21, after rock core 10 infiltrations, portion gas is discharged from the endpiece 23 of core holding unit 20.Certainly, in other embodiment, this cylinder 30 is also replaceable is the utensil etc. such as storing gases at high pressure, by opening this gases at high pressure utensil, realizes the gases at high pressure in it are injected to the object in core holding unit 20, and this is not restricted.In the present embodiment, between cylinder 30 and the inlet end 21 of core holding unit 20, be connected with the 3rd valve 35, the three valves 35 and can open or shifter cylinder 30, to realize the object of controlling to core holding unit 20 interior ventilations.When cylinder 30 is exerted pressure to core holding unit 20, can adopt the mode of the pressure that remains stable, even if also the piston 33 of cylinder 30 is at the interior uniform motion of cylinder body 31; Certainly, also can adopting moment to increase or reduce the mode that pressure produces pressure pulse, is also moment to increase or reduce the movement velocity of cylinder 30 inner carriers 33 in cylinder body 31.Further, between cylinder 30 and core holding unit 20, be also provided with pressure transducer 24, this pressure transducer 24 is for the pressure of the inlet end 21 of sensing core holding unit 20.
One end of the first cavity 50 is connected with the endpiece 23 of core holding unit 20, and its other end is connected with the second cavity 60, and in the present invention, the volume of the first cavity 50 is less than the volume of the second cavity 60.The benefit of design is like this, because gas is not easy through the low rock core of permeability, for example permeability is 0.01 millidarcy rock core, very little through the gas flow of Low Permeable Cores within a certain period of time, the first cavity 50 is designed to small size cavity, and when flowing into a small amount of gas, will there is significant change in the pressure in the first cavity 50, carry out thus the situation of change of gas-monitoring pressure, for accurately recording corresponding data, provide safeguard; The second cavity 60 is designed to large volume cavity, and it need to increase and pressure could occur after the gas of certain volume and change, and is applicable to high permeability rock core, and for example permeability is the permeability test that is greater than the rock core of 10 millidarcies.In the present embodiment, the volume of the first cavity 50 is 50～100 milliliters, and it is specially adapted to test the rock that permeability is 0.001～10 millidarcy; The volume of the second cavity is 500～1000 milliliters, and it is for testing permeability higher than the rock of 10 millidarcies.
In one embodiment of the invention, between the first cavity 50 and the second cavity 60, be provided with the first valve 70, this first valve 70 is for opening or close the path between the first cavity 50 and the second cavity 60.When the first valve 70 is closed, from endpiece 23 effluent airs of core holding unit 20, only enter the first cavity 50, and cannot enter in the second cavity 60, now only use the permeability of the first cavity 50 testing rock cores, this mode is applicable to test the rock core of low-permeability.When the first valve 70 is opened, the first cavity 50 is communicated with the second cavity 60, now from core holding unit 20 endpiece 23 effluent airs, through the first cavity 50, flows in the second cavity 60, and this mode is applicable to rock core percolation ratio test widely.
In one embodiment of the invention, between the first cavity 50 and core holding unit 20, be provided with the 4th valve 29, the four valves 29 for opening or close the path between core holding unit 20 and the first cavity 50.When the 4th valve 29 is closed, from endpiece 23 effluent airs of core holding unit 20, only can arrive in the pipeline between endpiece 23 and the 4th valve 29, in the present embodiment, the volume of described pipeline is less than 5 milliliters, it is specially adapted to the rock of test pole low-permeability, and for example permeability is lower than the rock core of 0.001 millidarcy.
Further, between the 4th valve 29 and core holding unit 20, be provided with pressure transducer 25, this pressure transducer 25 is for the pressure of the endpiece 23 of sensing core holding unit 20.
According to one embodiment of present invention, be connected in parallel to the second valve 22 on core holding unit 20, the two ends of this second valve 22 are connected with the inlet end 21 of core holding unit 20 and the endpiece 23 of core holding unit 20 respectively.When the second valve 22 is opened, core holding unit 20 inlet ends 21 and core holding unit 20 endpiece 23 are directly communicated with, and realize the pressure equilibrium of test macro 110.
According to one embodiment of present invention, this rock permeability proving installation also comprises air supply system 120 and data Collection & Processing System 130.
This air supply system 120 comprises gas cylinder 80, the 5th valve 81 and pressure transducer 83.Wherein, gas cylinder 80 storage inside have gases at high pressure, and it is connected with the inlet end 21 of core holding unit 20, and gas cylinder 80 is for to the interior injecting gas of test macro 110, and make the gas in test macro 110 reach certain pressure, for further testing create environment condition.The 5th valve 81 is arranged between gas cylinder 80 and the inlet end 21 of core holding unit 20, and when the 5th valve 81 is opened, the gas in gas cylinder 80 can enter test macro 110, and when the 5th valve 81 is closed, the gas in gas cylinder 80 cannot enter test macro 110.Pressure transducer 83 is arranged between gas cylinder 80 and the 5th valve 81, and it is the gaseous tension in gas cylinder 80 input core holding units 20 for sensing.
This data Collection & Processing System 130 comprises computing machine 119, and computing machine 119 is connected with pressure transducer 25 with the pressure transducer 24 of test macro 110 by data line.The pressure data that this computing machine 119 can provide according to pressure transducer 24 and pressure transducer 25, calculates the permeability value of rock core 10.
The course of work of rock permeability proving installation of the present invention is as follows, first rock core 10 is packed in core holding unit 20, by the rock core 10 in 40 pairs of core holding units 20 of pressue device, applies certain confined pressure.When needs are tested high permeability rock core, open the first valve 70, the second valve 22, the 3rd valve 35, the 4th valve 29 and the 5th valve 81, now, gas in air supply system 120 gas cylinders 80 is by Injection Testing 110, make test macro 110 reach certain pressure, this pressure is less than all the time pressue device 40 and is applied to the confined pressure pressure on rock core 10, after treating a period of time, the pressure of test macro 110 reaches equilibrium state, also be that the pressure that senses with pressure transducer 25 of pressure transducer 24 is when identical, close the 5th valve 81 and the second valve 22, utilize the piston 33 of cylinder 30 with respect to cylinder body 31 motions, realize and change the gaseous tension injecting in core holding unit 20, thereby realize the object that sends pressure pulse signal, this pressure signal is after rock core 10, pressure transducer 25 can monitor a corresponding pressure pulse signal at the second cavity 60 places, the pressure data that now data Collection & Processing System 130 utilizes 119 pairs of pressure transducers 24 of computing machine and pressure transducer 25 to sense by data line gathers, owing to being connected to the volume of the second cavity 60 of core holding unit 20 downstream end, fix, pressure pulse along with cylinder 30 generations, gaseous tension can produce corresponding pressure pulse by rock core 10, by the difference of the pressure pulse waveform form in contrast cylinder 30 and the second cavity 60, and the pressure data sensing in conjunction with pressure transducer 24 and pressure transducer 25, to calculate the permeability value of rock core 10.After experiment finishes, open the second valve 22, then slowly open be connected to the second cavity 60 ends valve 61 by gas discharging, last removal of core 10.
In the time need to testing the permeability of low percolation ratio rock core, it is similar with the course of work of test high permeability rock core, difference is, when experiment starts, the first valve 70 is closed, test process only utilizes the first cavity 50 to work, and the difference by the pressure pulse waveform form in contrast cylinder 30 and the first cavity 50 and in conjunction with the pressure data that pressure transducer 24 and pressure transducer 25 sense calculates the permeability value of rock core 10.When needing the permeability of test pole Low Permeable Cores, the course of work of itself and aforementioned description is similar, difference is, when experiment starts, the 4th valve 29 and the first valve 70 are closed, test process only utilizes the pipeline work between core holding unit 20 and the 4th valve 29, and the difference by the pressure pulse waveform form in contrast cylinder 30 and pipeline and in conjunction with the pressure data that pressure transducer 24 and pressure transducer 25 sense calculates the permeability value of rock core 10.
Rock permeability proving installation of the present invention, be provided with the first cavity 50 and the second cavity 60, when measuring the permeability of rock core of low-permeability, only use the first cavity 50 of small size, small volume due to the first cavity 50, its internal pressure is obvious with the volume change of gas, the pressure variation of the first cavity 50 is easily found, so that measurement data is accurate.When measuring the permeability of high permeability rock core, can adopt the second cavity 60 of large volume to test, the test that can meet high permeability rock core is used; In addition, by closing the 4th valve 29 being arranged between core holding unit 20 and the first cavity 50, can test the rock core percolation ratio that permeability is extremely low.This rock permeability proving installation of the present invention, can effectively solve the permeability test problem of high permeability rock, low-permeability rock and utmost point low-permeability rock.
These are only several embodiments of the present invention, those skilled in the art can carry out various changes or modification and not depart from the spirit and scope of the present invention the embodiment of the present invention according to the disclosed content of application documents.
Claims (10)
1. a rock permeability proving installation, is characterized in that, described rock permeability proving installation comprises test macro, and described test macro comprises:
Core holding unit, is folded with rock core in it, described core holding unit has inlet end and endpiece, and described inlet end is connected with cylinder;
Pressue device, it is connected with described core holding unit;
The first cavity, its one end is connected with the endpiece of described core holding unit, and its other end is connected with the second cavity.
2. rock permeability proving installation as claimed in claim 1, is characterized in that, the volume of described the first cavity is less than the volume of described the second cavity.
3. rock permeability proving installation as claimed in claim 2, is characterized in that, the volume of described the first cavity is 50～100 milliliters, and the volume of described the second cavity is 500～1000 milliliters.
4. rock permeability proving installation as claimed in claim 1, is characterized in that, between described the first cavity and described the second cavity, is provided with the first valve.
5. rock permeability proving installation as claimed in claim 1, is characterized in that, is connected in parallel to the second valve on described core holding unit.
6. rock permeability proving installation as claimed in claim 1, is characterized in that, is connected with the 3rd valve between described cylinder and the inlet end of described core holding unit.
7. rock permeability proving installation as claimed in claim 1, is characterized in that, between the endpiece of described core holding unit and described the first cavity, is connected with the 4th valve.
8. rock permeability proving installation as claimed in claim 1, it is characterized in that, between described pressue device and described core holding unit, between described the first cavity and described core holding unit and be respectively arranged with pressure transducer between described cylinder and described core holding unit.
9. rock permeability proving installation as claimed in claim 1, is characterized in that, described rock permeability proving installation also comprises air supply system, and described air supply system comprises gas cylinder, and described gas cylinder is connected with the inlet end of described core holding unit.
10. rock permeability proving installation as claimed in claim 1, it is characterized in that, described rock permeability proving installation also comprises data Collection & Processing System, and described data Collection & Processing System comprises computing machine, and described computing machine is connected with described test macro by data line.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237101A (en) * | 2014-09-18 | 2014-12-24 | 中国石油大学 | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device |
| CN104266949A (en) * | 2014-09-03 | 2015-01-07 | 中国石油大学(北京) | Measurement method of rock core gas logging permeability |
| CN104568674A (en) * | 2015-01-05 | 2015-04-29 | 中国石油天然气股份有限公司 | Pressure control device and gas diffusion coefficient measuring device thereof |
| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN108414419A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of test of three-axis penetration rate and CO2Displacement simulation experimental rig |
| CN108414418A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of three-axis penetration rate test method |
| CN108414727A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of CO2Displacement simulation test method |
| CN108956419A (en) * | 2018-07-03 | 2018-12-07 | 武汉索克能源科技有限公司 | A kind of core permeability test device and method under stress wave impulse action |
| CN109959595A (en) * | 2018-09-28 | 2019-07-02 | 中国石油天然气股份有限公司 | The test method and device of permeability during compact reservoir waterpower sand fracturing |
| CN109975140A (en) * | 2019-04-16 | 2019-07-05 | 重庆地质矿产研究院 | Supercritical carbon dioxide pulse fracturing and permeability testing integrated experimental device and method |
| CN112730187A (en) * | 2019-10-14 | 2021-04-30 | 中国石油天然气股份有限公司 | Stress sensitivity measuring device, method and system for permeability of reservoir |
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| CN104266949A (en) * | 2014-09-03 | 2015-01-07 | 中国石油大学(北京) | Measurement method of rock core gas logging permeability |
| CN104266949B (en) * | 2014-09-03 | 2017-03-29 | 中国石油大学(北京) | The measuring method of rock core perm-plug method |
| CN104237101A (en) * | 2014-09-18 | 2014-12-24 | 中国石油大学 | Bridge imitation and flow measurement avoidance type cross rock core permeability measurement method and device |
| CN104568674A (en) * | 2015-01-05 | 2015-04-29 | 中国石油天然气股份有限公司 | Pressure control device and gas diffusion coefficient measuring device thereof |
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| CN105842425A (en) * | 2016-05-23 | 2016-08-10 | 青岛中瑞泰软控技术有限公司 | Core holding unit and dynamic filtrate loss test unit |
| CN105842425B (en) * | 2016-05-23 | 2017-12-01 | 青岛中瑞泰软控科技股份有限公司 | A kind of core holding unit and dynamic filtration experimental provision |
| CN108414418A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of three-axis penetration rate test method |
| CN108414419A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of test of three-axis penetration rate and CO2Displacement simulation experimental rig |
| CN108414727A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of CO2Displacement simulation test method |
| CN108414418B (en) * | 2018-01-31 | 2020-08-25 | 中国矿业大学 | Triaxial permeability testing method |
| CN108956419A (en) * | 2018-07-03 | 2018-12-07 | 武汉索克能源科技有限公司 | A kind of core permeability test device and method under stress wave impulse action |
| CN109959595A (en) * | 2018-09-28 | 2019-07-02 | 中国石油天然气股份有限公司 | The test method and device of permeability during compact reservoir waterpower sand fracturing |
| CN109959595B (en) * | 2018-09-28 | 2022-02-01 | 中国石油天然气股份有限公司 | Method and device for testing permeability in hydraulic sand fracturing process of tight reservoir |
| CN109975140A (en) * | 2019-04-16 | 2019-07-05 | 重庆地质矿产研究院 | Supercritical carbon dioxide pulse fracturing and permeability testing integrated experimental device and method |
| CN112730187A (en) * | 2019-10-14 | 2021-04-30 | 中国石油天然气股份有限公司 | Stress sensitivity measuring device, method and system for permeability of reservoir |
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Application publication date: 20140423 |