CN106226503A - A kind of adjustable ring presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution - Google Patents
A kind of adjustable ring presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution Download PDFInfo
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- CN106226503A CN106226503A CN201610891441.4A CN201610891441A CN106226503A CN 106226503 A CN106226503 A CN 106226503A CN 201610891441 A CN201610891441 A CN 201610891441A CN 106226503 A CN106226503 A CN 106226503A
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- rock core
- uniform distribution
- annular adapter
- liquid outlet
- holding unit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
nullThe present invention relates to a kind of adjustable ring and press the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution，Including clamper cylinder、The rubber bush being positioned at clamper inner barrel and the inlet annular adapter being connected to clamper cylinder two ends and liquid outlet annular adapter，The two ends of rubber bush are provided with import rock core top and outlet rock core top，The annular barrel that rubber bush is the outer layer rubber sleeve different by internal diameter and internal layer rubber bush combines，Outer layer rubber sleeve、Outer layer ring pressure chamber and inner layer ring pressure chamber is formed between internal layer rubber bush and clamper cylinder，Outer layer ring pressure intracavity injects fluid and forms equally distributed ring pressure，Inner layer ring pressure chamber is injected fluid and is formed the ring pressure of non-uniform Distribution，This ring pressure acts on rock core to be measured，When rock core displacement pressure reduction is 20 40MPa，Make rock core hole by identical effective pressure，Make experiment closer to actual reservoir condition，Protection rock core is without damage，And make experimental result more accurate.
Description
Technical field
The invention belongs to oil gas field of engineering technology, relate to a kind of core experiment device, specifically, relate to a kind of rock core
Clamper, it is adaptable to the lithology of various different permeabilities.
Background technology
The unconventional petroleum resources ground in China's energy industry such as Oil in Super-low Permeability oil-gas reservoir in recent years, fine and close oil, shale gas
Position is more and more important.This kind of reservoir properties is poor, and permeability is low, relative to conventional reservoir rock core, required during displacement test
Displacement pressure reduction the biggest.For length between the rock core of 8-15cm, displacement pressure reduction usually reaches 20-40MPa, the highest.
In order to simulate the impact of oil reservoir burden pressure, and prevent the generation of core surface channelling phenomenon, core holding unit
It is designed with ring pressure device.The ring pressure of the conventional rock core holder employed in laboratory is all equally distributed, i.e. from rock at present
Heart injection end has identical ring pressure to output end.For conventional core, rock core displacement pressure reduction is about 1-2MPa, although all
The ring pressure of even distribution makes the different parts effective pressure (i.e. ring pressure and the difference of pore pressure) of rock core different, but to whole rock core
For, the effective pressure of rock core different parts is more or less the same, it is ensured that from injection end to the rock of the whole rock core of output end, fluid
Deformation basically identical.But for Oil in Super-low Permeability rock core, displacement pressure reduction usually reaches 20-40MPa, the highest, uniformly
Ring pressure distribution can make the effective pressure difference between rock core injection end and output end reach 20-40MPa, the highest.The highest
Effective pressure can cause the different parts of rock core that different deformation occurs, change the physical property of rock core, cause measurement result to go out
Existing deviation, even can produce plastic deformation time serious, damage rock core.
Summary of the invention
The present invention is directed to the ring pressure that prior art exists be uniformly distributed the effective pressure caused and cross ambassador's rock core and deform upon,
There are the problems referred to above such as deviation even rock core damage in rock core measurement result, it is provided that a kind of adjustable ring presses continuous non-uniform Distribution
Oil in Super-low Permeability core holding unit, when carrying out core experiment, can apply on flow in low permeability core seepage direction size continuous non-all
The ring pressure of even distribution, makes rock core hole by identical effective pressure so that tests closer to actual reservoir condition, protects rock
The heart is without damage, and makes experimental result more accurate.
In order to achieve the above object, the invention provides a kind of adjustable ring and press the Oil in Super-low Permeability rock core of continuous non-uniform Distribution
Clamper, the rubber bush including clamper cylinder, being positioned at clamper inner barrel and be connected to clamper cylinder two ends
Inlet annular adapter and liquid outlet annular adapter, the two ends of described rubber bush are provided with import rock core top and outlet rock
The heart comes directly towards, and described clamper cylinder lateral wall is provided with inlet and air vent, and described rubber bush is the outer layer different by internal diameter
The annular barrel that rubber bush and internal layer rubber bush combine, the two ends of rubber bush are set to circular filter net closure, folder
Holder cylinder forms, with outer layer rubber sleeve, inlet annular adapter and liquid outlet annular adapter, the outer layer ring pressure sealed
Chamber, outer layer rubber sleeve forms inner layer ring pressure chamber with internal layer rubber bush and circular filter net closure, and inner layer ring presses intracavity to fill
Porous media；Described internal layer rubber bush forms the seal rock chambers of the heart with import rock core top and outlet rock core top, is used for placing
Rock core to be measured；It is equipped with inlet and air vent, described liquid outlet on described inlet annular adapter and import rock core top
It is equipped with liquid outlet on annular adapter and outlet rock core top.
As the further design of the above-mentioned core holding unit of the present invention, the annular end of described inlet annular adapter
Face, the annular end face of described liquid outlet annular adapter, the inner face of described import rock core top and described outlet rock core
It is equipped with, on the inner face of top, the concentric same ring groove that multi-layer phase is intercommunicated.
As the further design of the above-mentioned core holding unit of the present invention, set at the liquid outlet of described liquid outlet annular adapter
There is back-pressure valve.
As the decision design of the above-mentioned core holding unit of the present invention, the outer wall of described liquid outlet annular adapter and clamper
The inwall of cylinder connects, and the inwall of liquid outlet annular adapter is connected with the outer wall of outlet rock core top.
As the decision design of the above-mentioned core holding unit of the present invention, the outer wall of described liquid outlet annular adapter is provided with outer spiral shell
Stricture of vagina, inwall is provided with female thread, and described external screw thread is connected with the female thread being located on described clamper cylinder inboard wall, described interior
Screw thread is connected with the external screw thread being located on the outer wall of described outlet rock core top.
As the decision design of the above-mentioned core holding unit of the present invention, the outer wall of described inlet annular adapter and clamper
The inwall of cylinder connects, and the outer wall that the inwall of inlet annular adapter comes directly towards with import rock core is connected.
As the decision design of the above-mentioned core holding unit of the present invention, the outer wall of described inlet annular adapter is provided with outer spiral shell
Stricture of vagina, inwall is provided with female thread, and described external screw thread is connected with the female thread being located on described clamper cylinder inboard wall, described interior
Screw thread is connected with the external screw thread being located on the outer wall of described import rock core top.
As the further design of the above-mentioned core holding unit of the present invention, it is located at inlet annular adapter and import rock core top
Inlet on head is respectively connected with compression pump.
As the decision design of the above-mentioned core holding unit of the present invention, the permeability of described porous media is less than rock core to be measured
Permeability.
As the decision design of the above-mentioned core holding unit of the present invention, the length in described rock core chamber presses chamber less than described inner layer ring
Length.
Compared with prior art, the beneficial effects of the present invention is:
(1) a kind of adjustable ring that the present invention provides presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, rubber sleeve
Cylinder is the annular barrel combined by the different outer layer rubber sleeve of internal diameter and internal layer rubber bush, outer layer rubber sleeve, interior
Forming outer layer ring pressure chamber and inner layer ring pressure chamber between layer rubber bush and clamper cylinder, outer layer ring pressure intracavity injects fluid and is formed
Equally distributed ring pressure, owing to being filled with porous media in inner layer ring pressure chamber, the permeability of porous media is relatively low, inner layer ring pressure
Fluid is injected in chamber can produce the pressure field of continuous distribution, and this pressure field is the ring pressure of continually varying ring pressure, i.e. non-uniform Distribution,
This ring pressure acts on rock core to be measured, when rock core displacement pressure reduction is 20-40MPa, makes rock core hole by identical effective pressure
Power so that testing closer to actual reservoir condition, protection rock core is without damage, and makes experimental result more accurate.
(2) a kind of adjustable ring that the present invention provides presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, is going out liquid
It is provided with back-pressure valve at the liquid outlet of choma shape adapter, (is wanted according to actual experiment in a setting value by regulation back-pressure valve pressure
Ask and determine) so that inject pressure when liquid arrives liquid outlet and necessarily be greater than this setting value and could flow out, by regulating back-pressure valve energy
Enough quantitative force value controlling rubber bush exit, it is simple to adjust the pressure reduction at inner layer ring pressure two ends, chamber.
(3) a kind of adjustable ring that the present invention provides presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, by changing
Become fluid viscosity, fluid velocity and the back pressure injected in the force value of outer layer ring pressure, and inner layer ring pressure intracavity porous media
The parameters such as valve force value, and then regulate the scope of ring pressure suffered by rock core to be measured, thus realize ring pressure suffered by rock core to be measured and become continuously
Change, it is adaptable to the rock core that various permeabilitys are different, the suitability is wide.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of one embodiment of the invention.
Fig. 2 is the cross-sectional view of another embodiment of the present invention.
Fig. 3 is the structural representation of embodiment of the present invention inlet annular adapter.
Fig. 4, Fig. 5 are the structural representation of embodiment of the present invention liquid outlet annular adapter.
Fig. 6 is the inner face structural representation of embodiment of the present invention inlet annular adapter.
Fig. 7 is the inner face structural representation of embodiment of the present invention liquid outlet annular adapter.
Fig. 8 is the inner face structural representation of embodiment of the present invention import rock core top.
Fig. 9 is the inner face structural representation of embodiment of the present invention outlet rock core top.
In figure, 1, clamper cylinder, the 11, first inlet, 12, first row QI KOU, 2, inlet annular adapter, 21,
Second inlet, 22, second exhaust port, 23, the annular end face of inlet annular adapter, 24, external screw thread, 25, female thread,
3, liquid outlet annular adapter, the 31, first liquid outlet, 32, the annular end face of liquid outlet annular adapter, 33, external screw thread,
34, female thread, 35, back-pressure valve, 4, import rock core top, the 41, the 3rd inlet, the 42, the 3rd air vent, 43, import rock core top
The inner face of head, 44, external screw thread, 5, outlet rock core top, the 51, second liquid outlet, 52, the inner face of outlet rock core top, 53,
External screw thread, 61, outer layer rubber sleeve, 62, internal layer rubber bush, 63, outer layer ring pressure chamber, 64, inner layer ring pressure chamber, 7, rock core chamber,
8, groove.
Detailed description of the invention
Below, by exemplary embodiment, the present invention is specifically described.It should be appreciated, however, that do not entering one
In the case of step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiments
In.
In describing the invention, it should be noted that term " interior ", " outward ", " on ", D score, "left", "right", " in
Between " etc. the orientation of instruction or position relationship be based on position relationship shown in the drawings, be for only for ease of and describe the present invention and Jian
Change describe rather than instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, is therefore not considered as limiting the invention.Additionally, term " first ", " second ", " the 3rd " are only used for describing mesh
, and it is not intended that indicate or hint relative importance.
In one embodiment of the invention, Fig. 1 is seen, it is provided that a kind of adjustable ring presses the super of continuous non-uniform Distribution
Low permeability cores clamper, including clamper cylinder 1, is positioned at the rubber bush within clamper cylinder 1 and is connected to clamper
The inlet annular adapter 2 at cylinder 1 two ends and liquid outlet annular adapter 3；The lower wall interposition of described clamper cylinder 1
Having installed the first inlet 11, the upper side wall centre position of described clamper cylinder 1 is provided with first row QI KOU 12；Described rubber sleeve
The left end of cylinder is provided with import rock core top 4, and right-hand member is provided with outlet rock core top 5；Described inlet annular adapter 2 is positioned at clamping
The left side of device cylinder 1, which is provided with the second inlet 21 and second exhaust port 22, and described liquid outlet annular adapter 3 is provided with
First liquid outlet 31；Described import rock core top 4 is provided with the 3rd inlet 41 and the 3rd air vent 42, described outlet rock core top
Being equipped with the second liquid outlet 51 on 5, described rubber bush is by the different outer layer rubber sleeve 61 of internal diameter and internal layer rubber bush
62 combine, and the two ends of rubber bush are set to circular filter net closure, clamper cylinder 1 and outer layer rubber sleeve 61, feed liquor
Choma shape adapter 2 and liquid outlet annular adapter 3 form the outer layer ring pressure chamber 63 sealed, outer layer rubber sleeve 61 and internal layer rubber
Rubber sleeve 62 and circular filter net closure form inner layer ring pressure chamber 64, filling porous medium in inner layer ring pressure chamber 64；Described internal layer
Rubber bush 62 and import rock core top 4 and the outlet rock core top 5 formation seal rock chambers of the heart 7, be used for placing rock core to be measured.
Seeing Fig. 1, the described outer wall of inlet annular adapter is connected with the inwall of clamper cylinder, and inlet annular turns
Connecing the outer wall that the inwall of device comes directly towards with import rock core to be connected, the outer wall of described liquid outlet annular adapter is interior with clamper cylinder
Wall connects, and the inwall of liquid outlet annular adapter is connected with the outer wall of outlet rock core top.
In order to realize inlet annular adapter and clamper cylinder and the connection of import rock core top, to above-described embodiment
In core holding unit carry out decision design, see Fig. 3, Fig. 6, the outer wall at described inlet annular adapter 2 is provided with outer spiral shell
Stricture of vagina 24, inwall is provided with female thread 25, and described external screw thread 24 is connected with the female thread being located on described clamper cylinder inboard wall,
Described female thread 25 is connected with the external screw thread 44 being located on the outer wall of described import rock core top.
In order to realize liquid outlet annular adapter and clamper cylinder and the connection of outlet rock core top, to above-described embodiment
In core holding unit carry out decision design, see Fig. 4, Fig. 7, the outer wall at described liquid outlet annular adapter 3 is provided with outer spiral shell
Stricture of vagina 33, inwall is provided with female thread 34, the external screw thread 33 of described liquid outlet annular adapter be located in described clamper cylinder
Female thread on wall is connected, and the female thread 34 of described liquid outlet annular adapter comes directly towards on outer wall with being located at described outlet rock core
External screw thread 53 be connected.
Owing to import rock core top comes directly towards the most logical with liquid outlet annular adapter with inlet annular adapter, outlet rock core
Cross threaded, come directly towards and export rock core top by rotating inlet rock core and can regulate the position of rock core to be measured.
For the ease of the injection of fluid, described second inlet 21 and described 3rd inlet 41 are respectively connected with compression pump.
In order to ensure that the liquid of the second inlet 21 and the first liquid outlet 31 can be distributed in inner layer ring pressure chamber uniformly
The end face of porous media, and make inner layer ring pressure chamber in porous media end face on each point pressure consistent.To above-described embodiment institute
The core holding unit stated carries out decision design, sees Fig. 6 and Fig. 7, annular end face 23 He of described inlet annular adapter
The annular end face 32 of described liquid outlet annular adapter is equipped with the concentric same ring groove 8 that multi-layer phase is intercommunicated.
In order to ensure that the liquid of the 3rd inlet 41 and the second liquid outlet 51 can be uniformly distributed in rock core end face to be measured, and
Make each point pressure on rock core end face to be measured consistent.Core holding unit described in above-described embodiment is carried out decision design, sees
It is equipped with multilamellar on Fig. 8 and Fig. 9, the inner face 43 of described import rock core top and the inner face 52 of described outlet rock core top
The concentric same ring groove 8 being interconnected.
In order to ensure that the different parts of rock core to be measured has identical effective pressure, prevent rock core to be measured from damaging, to above-mentioned reality
Executing the core holding unit described in example and carry out decision design, the permeability of described porous media is less than rock core permeability to be measured, it is achieved
Inner layer ring is pressed continuously and non-uniform Distribution, effectively prevent rock core to be measured because of different parts effective pressure (i.e. ring pressure and hole
The difference of pressure) the excessive rock core to be measured damage problem caused.
In order to be further ensured that the different parts of rock core to be measured has identical effective pressure, prevent rock core to be measured from damaging, right
Core holding unit described in above-described embodiment carries out decision design, and the length in described rock core chamber is less than the length in described inner layer ring pressure chamber
Degree.
When utilizing the core holding unit described in above-described embodiment that rock core to be measured is carried out displacement test, first connect rock core
Clamper also loads rock core to be measured, is positioned in calorstat, sets calorstat temperature.Before carrying out displacement test, open first
Inlet 11 and first row QI KOU 12, inject fluid in outer layers ring pressure chamber 63, closes after being full of fluid in outer layer ring pressure chamber 63
Close first row QI KOU 12, apply equally distributed ring pressure i.e. to rubber bush and rock core, prevent channelling phenomenon.Outer layer is located in utilization
The pressure transducer of ring pressure intracavity measures the pressure of outer layer ring pressure intracavity, when reaching to test required ring pressure, opens the second feed liquor
Mouthfuls 21 and second exhaust port 22, the inner layer ring pressure chamber 64 in rubber bush is injected fluid, is closed second exhaust port 22 after emptying,
Continue to press chamber 64 to inject fluid to the inner layer ring rubber bush, owing to inner layer ring presses intracavity porous media from the second inlet 21
Permeability the lowest, the pressure field of continuous distribution can be produced from second inlet the 21 to the first liquid outlet 31, this pressure field is for even
The ring pressure of continuous change, acts on rock core to be measured, the speed of fluid, viscosity in regulation inner layer ring pressure intracavity porous media, obtains
The ring pressure of the suitable continuous non-uniform Distribution put on, it is ensured that the effective pressure of whole rock core is consistent so that experiment more connects
Being bordering on actual reservoir condition, protection rock core is without damage, and makes experimental result more accurate.Open the 3rd inlet 41 and the 3rd
Air vent 42, injects fluid by the 3rd inlet 41 in core chamber 7, closes the 3rd row after being full of fluid in core chamber 7
QI KOU 42, continues to inject fluid in core chamber 7, can carry out next step displacement test.
In another embodiment of the present invention, see Fig. 2, Fig. 5, in order to about further fixing quantity inner layer ring pressure chamber
The pressure limit at two ends, is provided with back-pressure valve 35 at described second liquid outlet 31.Regulation back-pressure valve pressure is required according to actual experiment
Power is to setting value so that could flow out the clamping of described rock core when injecting pressure when liquid arrives liquid outlet higher than this setting value
Device.
When utilizing the core holding unit described in this embodiment that rock core to be measured is carried out displacement test, first connect rock core
Clamper also loads rock core to be measured, is positioned in calorstat, sets calorstat temperature.Before carrying out displacement test, open first
Inlet 11 and first row QI KOU 12, inject fluid in outer layers ring pressure chamber 63, closes after being full of fluid in outer layer ring pressure chamber 63
Close first row QI KOU 12, apply equally distributed ring pressure i.e. to rubber bush and rock core, prevent channelling phenomenon.Outer layer is located in utilization
The pressure transducer of ring pressure intracavity measures the pressure of outer layer ring pressure intracavity, when reaching to test required ring pressure, opens the second feed liquor
Mouthfuls 21 and second exhaust port 22, the inner layer ring pressure chamber 64 in rubber bush is injected fluid, is closed second exhaust port 22 after emptying,
Regulation back-pressure valve 35 pressure is to setting value so that injects pressure when fluid arrives the first liquid outlet 31 and need to be higher than this setting value ability
Flowing out, described setting value determines according to actual experiment demand, continues to the inner layer ring pressure rubber bush from the second inlet 21
Fluid is injected in chamber 64, owing to the permeability of inner layer ring pressure intracavity porous media is relatively low, from second inlet the 21 to the first liquid outlet
31 pressure fields that can produce continuous distribution, this pressure field is continually varying ring pressure, acts on rock core to be measured, regulates inner layer ring
The speed of fluid, viscosity in pressure intracavity porous media, obtain the ring pressure of the suitable continuous non-uniform Distribution put on, it is ensured that
The effective pressure (i.e. ring pressure and the difference of pore pressure) of whole rock core is consistent so that tests closer to actual reservoir condition, protects
Protect rock core without damage, and make experimental result more accurate.Open the 3rd inlet 41 and the 3rd air vent 42, enter by the 3rd
Liquid mouth 41 injects fluid in core chamber 7, closes the 3rd air vent 42, continue to core chamber 7 after being full of fluid in core chamber 7
Interior injection fluid, can carry out next step displacement test.
In the core holding unit that the above embodiment of the present invention provides, described porous media is quartz sand, it is also possible to for
The porous media that other permeabilitys are less, by changing the porous media of inner layer ring pressure intracavity, can be to the rock of different permeability
The heart carries out displacement test, as long as ensureing that the permeability of porous media is less than rock core to be measured.Therefore, the rock core that the present invention provides
Clamper is applicable to the rock core that various permeability is different, and the suitability is wide.
Above-described embodiment is used for explaining the present invention rather than limiting the invention, in spirit and the right of the present invention
In the protection domain required, any modifications and changes that the present invention is made, both fall within protection scope of the present invention.
Claims (10)
1. adjustable ring presses an Oil in Super-low Permeability core holding unit for continuous non-uniform Distribution, including clamper cylinder, is positioned at clamping
The rubber bush of device inner barrel and be connected to the inlet annular adapter at clamper cylinder two ends and liquid outlet annular turns
Connecing device, the two ends of described rubber bush are provided with import rock core top and outlet rock core top, and described clamper cylinder lateral wall sets
There are inlet and air vent, it is characterised in that described rubber bush is the outer layer rubber sleeve different by internal diameter and internal layer rubber
The annular barrel of sleeve combination, the two ends of rubber bush are set to circular filter net closure, clamper cylinder and outer layer rubber
Sleeve, inlet annular adapter and liquid outlet annular adapter form the outer layer ring pressure chamber sealed, and outer layer rubber sleeve is with interior
Layer rubber bush and circular filter net closure form inner layer ring pressure chamber, the inner layer ring pressure filling porous medium of intracavity；Described internal layer rubber
Rubber sleeve forms the seal rock chambers of the heart with import rock core top and outlet rock core top, is used for placing rock core to be measured；Described inlet
Inlet and air vent, described liquid outlet annular adapter and outlet rock core it is equipped with on annular adapter and import rock core top
Liquid outlet it is equipped with on top.
A kind of adjustable ring the most as claimed in claim 1 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, its feature
Be, the annular end face of described inlet annular adapter, the annular end face of described liquid outlet annular adapter, described in enter
It is equipped with, on the inner face of mouth rock core top and the inner face of described outlet rock core top, the concentric same ring that multi-layer phase is intercommunicated
Groove.
3. a kind of adjustable ring as described in claim 1 or 2 any one presses the Oil in Super-low Permeability rock core folder of continuous non-uniform Distribution
Holder, it is characterised in that be provided with back-pressure valve at the liquid outlet of described liquid outlet annular adapter.
A kind of adjustable ring the most as claimed in claim 3 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, its feature
Being, the described outer wall of liquid outlet annular adapter is connected with the inwall of clamper cylinder, the inwall of liquid outlet annular adapter
It is connected with the outer wall of outlet rock core top.
A kind of adjustable ring the most as claimed in claim 4 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, its feature
Being, the outer wall of described liquid outlet annular adapter is provided with external screw thread, and inwall is provided with female thread, described external screw thread be located at institute
The female thread stated on clamper cylinder inboard wall is connected, described female thread and the outer spiral shell being located on the outer wall of described outlet rock core top
Stricture of vagina is connected.
6. a kind of adjustable ring as described in claim 1 or 2 or 4 or 5 any one presses the ultralow of continuous non-uniform Distribution
Ooze core holding unit, it is characterised in that the described outer wall of inlet annular adapter is connected with the inwall of clamper cylinder, feed liquor
The outer wall that the inwall of choma shape adapter comes directly towards with import rock core is connected.
A kind of adjustable ring the most as claimed in claim 6 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, its feature
Being, the outer wall of described inlet annular adapter is provided with external screw thread, and inwall is provided with female thread, described external screw thread be located at institute
The female thread stated on clamper cylinder inboard wall is connected, described female thread and the outer spiral shell being located on the outer wall of described import rock core top
Stricture of vagina is connected.
A kind of adjustable ring the most as claimed in claim 7 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, its feature
Being, the inlet being located on inlet annular adapter and import rock core top is respectively connected with compression pump.
9. a kind of adjustable ring as described in claim 1 or 8 any one presses the Oil in Super-low Permeability rock core folder of continuous non-uniform Distribution
Holder, it is characterised in that the permeability of described porous media is less than the permeability of rock core to be measured.
A kind of adjustable ring the most as claimed in claim 9 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, its feature
Being, the length in described rock core chamber is less than the length in described inner layer ring pressure chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891441.4A CN106226503B (en) | 2016-10-13 | 2016-10-13 | A kind of adjustable ring presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution |
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| CN201610891441.4A CN106226503B (en) | 2016-10-13 | 2016-10-13 | A kind of adjustable ring presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution |
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| CN109342277A (en) * | 2018-10-19 | 2019-02-15 | 中国石油天然气股份有限公司 | Core holding unit and the reverse imbibition experimental provision of rock core |
| CN109709266A (en) * | 2018-12-03 | 2019-05-03 | 中国石油集团川庆钻探工程有限公司 | A kind of straight well stratified reservoir flowing simulated experiment device and method |
| CN109884272A (en) * | 2019-03-05 | 2019-06-14 | 中国石油大学(北京) | A kind of simulation system of diagenesis evolution |
| CN110887766A (en) * | 2019-11-01 | 2020-03-17 | 中国石油化工股份有限公司石油勘探开发研究院 | Compact gas-seal-layer mining fluid-solid coupling gas-water nonlinear seepage experimental device and method |
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