CN106226503B - 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
- Publication number
- CN106226503B CN106226503B CN201610891441.4A CN201610891441A CN106226503B CN 106226503 B CN106226503 B CN 106226503B CN 201610891441 A CN201610891441 A CN 201610891441A CN 106226503 B CN106226503 B CN 106226503B
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- Prior art keywords
- rock core
- wall
- annular adapter
- liquid outlet
- uniform distribution
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Classifications
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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
The present invention relates to the Oil in Super-low Permeability core holding units that a kind of adjustable ring presses continuous non-uniform Distribution,Including clamper cylinder,Positioned at clamper inner barrel rubber bush and be connected to the inlet annular adapter at clamper cylinder both ends and liquid outlet annular adapter,The both ends of rubber bush are equipped with import rock core and come directly towards and export rock core top,Rubber bush is the annular barrel being composed of the different outer layer rubber sleeve of internal diameter and internal layer rubber bush,Outer layer rubber sleeve,Outer layer ring pressure chamber and inner layer ring pressure chamber are formed between internal layer rubber bush and clamper cylinder,Outer layer ring pressure intracavitary injection fluid forms equally distributed ring pressure,Inner layer ring pressure chamber injection fluid forms the ring pressure of non-uniform Distribution,The ring pressure is acted on rock core to be measured,When rock core displacement pressure difference is 20 40MPa,Make rock core hole by identical effective pressure,So that it tests closer to practical reservoir condition,Protect rock core without damage,And make experimental result more accurate.
Description
Technical field
The invention belongs to oil gas field of engineering technology, are related to a kind of core experiment device, specifically, being related to a kind of rock core
Clamper, suitable for the lithology of various different permeabilities.
Background technology
The ground of the unconventional petroleum resources 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 are poor, and permeability is low, required during displacement test relative to conventional reservoir rock core
Displacement pressure difference it is very big.For length between the rock core of 8-15cm, displacement pressure difference usually reaches 20-40MPa, even higher.
In order to simulate the influence 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 at present, i.e., from rock
Heart injection end has identical ring pressure to output end.For conventional core, rock core displacement pressure difference is about 1-2MPa, although
The ring of even distribution is pressed so that the different parts effective pressure (i.e. the difference of ring pressure and pore pressure) of rock core is different, but to entire rock core
For, the effective pressure of rock core different parts is not much different, and ensure that from injection end to the rock of the entire rock core in output end, fluid
Deformation it is basically identical.But for Oil in Super-low Permeability rock core, displacement pressure difference usually reaches 20-40MPa, even higher, uniformly
Ring pressure distribution can cause the effective pressure difference between rock core injection end and output end to reach 20-40MPa, even higher.It is so high
Effective pressure can cause the different parts of rock core that different deformation occurs, change the physical property of rock core, measurement result caused to go out
Existing deviation, can even generate plastic deformation when serious, damage rock core.
Invention content
Effective pressure caused by the present invention is uniformly distributed for ring pressure of the existing technology is crossed ambassador's rock core and is deformed upon,
There are the deviation even above problems such as rock core damage in rock core measurement result, provides a kind of adjustable ring and 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 it is continuous it is non-
The ring pressure of even distribution makes rock core hole by identical effective pressure so that tests closer to practical reservoir condition, protects rock
The heart is without damage, and makes experimental result more accurate.
In order to achieve the above object, the present invention provides the Oil in Super-low Permeability rock cores that a kind of adjustable ring presses continuous non-uniform Distribution
Clamper, including clamper cylinder, positioned at clamper inner barrel rubber bush and be connected to clamper cylinder both ends
Inlet annular adapter and liquid outlet annular adapter, the both ends of the rubber bush are equipped with import rock core and come directly towards and export rock
The heart comes directly towards, and the clamper cylinder lateral wall is equipped with inlet and exhaust outlet, and the rubber bush is by the different outer layer of internal diameter
The annular barrel that rubber bush and internal layer rubber bush are composed, the both ends of rubber bush are set as circular filter net closure, folder
Holder cylinder forms the outer layer ring pressure of sealing with outer layer rubber sleeve, inlet annular adapter and liquid outlet annular adapter
Chamber, outer layer rubber sleeve block to form inner layer ring pressure chamber with internal layer rubber bush and circular filter net, inner layer ring pressure intracavitary filling
Porous media；The internal layer rubber bush comes directly towards and exports rock core with import rock core and comes directly towards to form the seal rock chambers of the heart, for placing
Rock core to be measured；Inlet and exhaust outlet, the liquid outlet are equipped on the inlet annular adapter and import rock core top
Liquid outlet is equipped 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 the inlet annular adapter
Face, the annular end face of the liquid outlet annular adapter, the inner face of import rock core top and the outlet rock core
The concentric same ring groove that multilayer is interconnected is equipped on the inner face of top.
As the further design of the above-mentioned core holding unit of the present invention, set at the liquid outlet of the liquid outlet annular adapter
There is back-pressure valve.
As the preferred design of the above-mentioned core holding unit of the present invention, the outer wall and clamper of the liquid outlet annular adapter
The inner wall connection of cylinder, the inner wall of liquid outlet annular adapter are connect with the outer wall of outlet rock core top.
As the preferred design of the above-mentioned core holding unit of the present invention, the outer wall of the liquid outlet annular adapter is equipped with outer spiral shell
Line, inner wall are equipped with internal thread, and the external screw thread is connected with the internal thread on the clamper cylinder inboard wall, described interior
Screw thread is connected with the external screw thread on the outlet rock core top outer wall.
As the preferred design of the above-mentioned core holding unit of the present invention, the outer wall and clamper of the inlet annular adapter
The inner wall connection of cylinder, the inner wall of inlet annular adapter are connect with the outer wall that import rock core comes directly towards.
As the preferred design of the above-mentioned core holding unit of the present invention, the outer wall of the inlet annular adapter is equipped with outer spiral shell
Line, inner wall are equipped with internal thread, and the external screw thread is connected with the internal thread on the clamper cylinder inboard wall, described interior
Screw thread is connected with the external screw thread on the outer wall of import rock core top.
As the further design of the above-mentioned core holding unit of the present invention, set on inlet annular adapter and import rock core top
Inlet on head is respectively connected with compression pump.
As the preferred design of the above-mentioned core holding unit of the present invention, the permeability of the porous media is less than rock core to be measured
Permeability.
As the preferred design of the above-mentioned core holding unit of the present invention, the length of the rock core chamber is less than the inner layer ring and presses chamber
Length.
Compared with prior art, the beneficial effects of the present invention are：
(1) a kind of adjustable ring provided by the invention presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, rubber sleeve
Cylinder is the annular barrel that is composed of the different outer layer rubber sleeve of internal diameter and internal layer rubber bush, outer layer rubber sleeve, interior
Outer layer ring pressure chamber and inner layer ring pressure chamber are formed between layer rubber bush and clamper cylinder, outer layer ring pressure intracavitary injection fluid is formed
Equally distributed ring pressure, since inner layer ring is pressed filled with porous media in chamber, the permeability of porous media is relatively low, inner layer ring pressure
Chamber injection fluid can generate continuously distributed pressure field, ring pressure of the pressure field for the ring pressure, i.e. non-uniform Distribution of consecutive variations,
The ring pressure is acted on rock core to be measured, when rock core displacement pressure difference is 20-40MPa, makes rock core hole by identical effective pressure
Power so that test closer to practical reservoir condition, protection rock core is without damage, and makes experimental result more accurate.
(2) a kind of adjustable ring provided by the invention presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, is going out liquid
Back-pressure valve is equipped at the liquid outlet of choma shape adapter, it (will according to actual experiment in a setting value by adjusting back-pressure valve pressure
Ask determining) so that pressure, which necessarily is greater than this setting value, when injection liquid reaches liquid outlet to flow out, by adjusting back-pressure valve energy
The pressure value in enough quantitative control rubber bush exits is conveniently adjusted the pressure difference at inner layer ring pressure chamber both ends.
(3) a kind of adjustable ring provided by the invention 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 pressure value of outer layer ring pressure and inner layer ring pressure intracavitary porous media
The parameters such as valve pressure value, and then the range of ring pressure suffered by rock core to be measured is adjusted, become so as to fulfill ring pressure is continuous suffered by rock core to be measured
Change, suitable for the different rock core of various permeability, applicability is wide.
Description of the drawings
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 structure diagram of inlet annular adapter of the embodiment of the present invention.
Fig. 4, Fig. 5 are the structure diagram of liquid outlet annular adapter of the embodiment of the present invention.
Fig. 6 is the inner face structure diagram of inlet annular adapter of the embodiment of the present invention.
Fig. 7 is the inner face structure diagram of liquid outlet annular adapter of the embodiment of the present invention.
Fig. 8 is the inner face structure diagram of import of embodiment of the present invention rock core top.
Fig. 9 is the inner face structure diagram that the embodiment of the present invention exports rock core top.
In figure, 1, clamper cylinder, the 11, first inlet, 12, first row gas port, 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, internal thread,
3rd, liquid outlet annular adapter, the 31, first liquid outlet, 32, the annular end face of liquid outlet annular adapter, 33, external screw thread,
34th, internal thread, 35, back-pressure valve, 4, import rock core top, 41, third inlet, 42, third exhaust outlet, 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,
8th, groove.
Specific embodiment
In the following, the present invention is specifically described by illustrative embodiment.It should be appreciated, however, that not into one
In the case of step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiment
In.
In the description of the present invention, it should be noted that term " interior ", " outer ", " on ", " under ", "left", "right", " in
Between " etc. instructions orientation or position relationship be based on position relationship shown in the drawings, be for only for ease of the description present invention and letter
Change description rather than instruction or imply signified device or element must have specific orientation, with specific azimuth configuration and
Operation, therefore be not considered as limiting the invention.In addition, term " first ", " second ", " third " are only used for description mesh
, and it is not intended that instruction or hint relative importance.
In one embodiment of the invention, it referring to Fig. 1, provides a kind of adjustable ring and presses the super of continuous non-uniform Distribution
Low permeability cores clamper including clamper cylinder 1, the rubber bush inside clamper cylinder 1 and is connected to clamper
The inlet annular adapter 2 at 1 both ends of cylinder and liquid outlet annular adapter 3；The lower wall interposition of the clamper cylinder 1
The first inlet 11 is installed, the upper side wall centre position of the clamper cylinder 1 is equipped with first row gas port 12；The rubber sleeve
The left end of cylinder is equipped with import rock core and comes directly towards 4, and right end is equipped with outlet rock core top 5；The inlet annular adapter 2 is located at clamping
The left side of device cylinder 1, which is provided with the second inlet 21 and second exhaust port 22, and the liquid outlet annular adapter 3 is equipped with
First liquid outlet 31；The import rock core top 4 is equipped with third inlet 41 and third exhaust outlet 42, the outlet rock core top
The second liquid outlet 51 is equipped on first 5, the rubber bush is by the different outer layer rubber sleeve 61 of internal diameter and internal layer rubber bush
62 are composed, and the both ends of rubber bush are set as 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 of sealing, outer layer rubber sleeve 61 and internal layer rubber
Rubber sleeve 62 and circular filter net block to form inner layer ring pressure chamber 64, filling porous media in inner layer ring pressure chamber 64；The internal layer
Rubber bush 62 forms the seal rock chambers of the heart 7 with import rock core top 4 and outlet rock core top 5, for placing rock core to be measured.
Referring to Fig. 1, the outer wall of the inlet annular adapter is connect with the inner wall of clamper cylinder, and inlet annular turns
The inner wall for connecing device is connect with the outer wall that import rock core comes directly towards, and the outer wall of the liquid outlet annular adapter is interior with clamper cylinder
Wall connects, and the inner wall of liquid outlet annular adapter is connect with the outer wall of outlet rock core top.
In order to realize inlet annular adapter and the connection of clamper cylinder and import rock core top, to above-described embodiment
In core holding unit carry out preferred design, referring to Fig. 3, Fig. 6, outer spiral shell is equipped in the outer wall of the inlet annular adapter 2
Line 24, inner wall are equipped with internal thread 25, and the external screw thread 24 is connected with the internal thread on the clamper cylinder inboard wall,
The internal thread 25 is connected with the external screw thread 44 on the outer wall of import rock core top.
In order to realize liquid outlet annular adapter and the connection of clamper cylinder and outlet rock core top, to above-described embodiment
In core holding unit carry out preferred design, referring to Fig. 4, Fig. 7, outer spiral shell is equipped in the outer wall of the liquid outlet annular adapter 3
Line 33, inner wall are equipped with internal thread 34, and the external screw thread 33 of the liquid outlet annular adapter is with being set in the clamper cylinder
Internal thread on wall is connected, and the internal thread 34 of the liquid outlet annular adapter set on the outlet rock core with coming directly towards on outer wall
External screw thread 53 be connected.
Since import rock core top and inlet annular adapter, outlet rock core top and liquid outlet annular adapter are logical
Threaded connection is crossed, the position of rock core to be measured can be adjusted by coming directly towards and export rock core top by rotating inlet rock core.
For the ease of the injection of fluid, second inlet 21 and the third inlet 41 are respectively connected with compression pump.
In order to which the liquid for ensureing the second inlet 21 and the first liquid outlet 31 can be uniformly distributed in inner layer ring pressure chamber
The end face of porous media, and so that each point pressure is consistent on the end face of porous media in inner layer ring pressure chamber.To above-described embodiment institute
The core holding unit stated carries out preferred design, referring to Fig. 6 and Fig. 7,23 He of annular end face of the inlet annular adapter
The annular end face 32 of the liquid outlet annular adapter is equipped with the concentric same ring groove 8 that multilayer is interconnected.
In order to which the liquid for ensureing 41 and second liquid outlet 51 of third inlet can be uniformly distributed in rock core end face to be measured, and
So that each point pressure is consistent on rock core end face to be measured.Preferred design is carried out to the core holding unit described in above-described embodiment, referring to
Multilayer is equipped on the inner face 52 of Fig. 8 and Fig. 9, the inner face 43 of the import rock core top and the outlet rock core top
Interconnected concentric same ring groove 8.
In order to which the different parts for ensureing rock core to be measured have identical effective pressure, prevent rock core to be measured from damaging, to above-mentioned reality
It applies the core holding unit described in example and carries out preferred design, the permeability of the porous media is less than rock core permeability to be measured, realizes
Inner layer ring presses continuous and non-uniform Distribution, effectively prevents rock core to be measured because of different parts effective pressure (i.e. ring pressure and hole
The difference of pressure) it is excessive caused by rock core to be measured damage problem.
In order to further ensure the different parts of rock core to be measured have identical effective pressure, prevent rock core to be measured from damaging, it is right
Core holding unit described in above-described embodiment carries out preferred design, and the length of the rock core chamber is less than the length of inner layer ring pressure chamber
Degree.
When carrying out displacement test to rock core to be measured using the core holding unit described in above-described embodiment, rock core is connected first
Clamper simultaneously loads rock core to be measured, is positioned in insulating box, sets calorstat temperature.Before carrying out displacement test, first is opened
Inlet 11 and first row gas port 12, outer layers ring press injection fluid in chamber 63, are closed after fluid is full of in outer layer ring pressure chamber 63
First row gas port 12 is closed, i.e., applies equally distributed ring pressure to rubber bush and rock core, prevents channelling phenomenon.Using set on outer layer
The pressure sensor of ring pressure intracavitary measures the pressure of outer layer ring pressure intracavitary, when reaching ring pressure needed for experiment, opens the second feed liquor
Mouth 21 and second exhaust port 22, the inner layer ring pressure chamber 64 into rubber bush inject fluid, second exhaust port 22 are closed after emptying,
Continue the inner layer ring pressure chamber 64 into rubber bush from the second inlet 21 and inject fluid, since inner layer ring presses intracavitary porous media
Permeability it is very low, can generate continuously distributed pressure field from second the 21 to the first liquid outlet of inlet 31, the pressure field for connect
The ring pressure of continuous variation, acts on rock core to be measured, adjusts speed, the viscosity of fluid in inner layer ring pressure intracavitary porous media, obtains
The ring pressure of the suitable continuous non-uniform Distribution being applied to, ensures that the effective pressure of entire rock core is consistent so that experiment more connects
Practical reservoir condition is bordering on, protection rock core is without damage, and makes experimental result more accurate.Open third inlet 41 and third
Exhaust outlet 42 injects fluid by third inlet 41 into core chamber 7, and third row is closed after fluid is full of in core chamber 7
Gas port 42 continues to inject fluid into core chamber 7, you can carry out the displacement test of next step.
In another embodiment of the present invention, referring to Fig. 2, Fig. 5, in order to which further quantitatively control inner layer ring presses chamber or so
The pressure limit at both ends is equipped with back-pressure valve 35 at second liquid outlet 31.It is required to adjust back-pressure valve pressure according to actual experiment
Power is to setting value so that pressure when injection liquid reaches liquid outlet could flow out the rock core clamping when being higher than this setting value
Device.
When carrying out displacement test to rock core to be measured using the core holding unit described in the embodiment, rock core is connected first
Clamper simultaneously loads rock core to be measured, is positioned in insulating box, sets calorstat temperature.Before carrying out displacement test, first is opened
Inlet 11 and first row gas port 12, outer layers ring press injection fluid in chamber 63, are closed after fluid is full of in outer layer ring pressure chamber 63
First row gas port 12 is closed, i.e., applies equally distributed ring pressure to rubber bush and rock core, prevents channelling phenomenon.Using set on outer layer
The pressure sensor of ring pressure intracavitary measures the pressure of outer layer ring pressure intracavitary, when reaching ring pressure needed for experiment, opens the second feed liquor
Mouth 21 and second exhaust port 22, the inner layer ring pressure chamber 64 into rubber bush inject fluid, second exhaust port 22 are closed after emptying,
35 pressure of back-pressure valve is adjusted to setting value so that pressure need to be higher than the setting value ability when injection fluid reaches the first liquid outlet 31
Outflow, the setting value is determined according to actual experiment demand, continues the inner layer ring pressure into rubber bush from the second inlet 21
Chamber 64 injects fluid, since the permeability of inner layer ring pressure intracavitary porous media is relatively low, from second the 21 to the first liquid outlet of inlet
31 can generate continuously distributed pressure field, which is the ring pressure of consecutive variations, is acted on rock core to be measured, adjust inner layer ring
Speed, the viscosity of fluid in intracavitary porous media are pressed, obtains the ring pressure of the suitable continuous non-uniform Distribution being applied to, is ensured
The effective pressure (i.e. the difference of ring pressure and pore pressure) of entire rock core is consistent so that tests closer to practical reservoir condition, protects
It is without damage to protect rock core, and makes experimental result more accurate.Open third inlet 41 and third exhaust outlet 42, by third into
Liquid mouth 41 injects fluid into core chamber 7, closes third exhaust outlet 42 after fluid is full of in core chamber 7, continues to core chamber 7
Interior injection fluid, you can carry out the displacement test of next step.
In the core holding unit provided in the above embodiment of the present invention, the porous media is quartz sand, or
The smaller porous media of other permeability presses the porous media of intracavitary by replacing inner layer ring, 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, rock core provided by the invention
Clamper is suitable for the different rock core of various permeability, and applicability is wide.
Above-described embodiment is used for explaining the present invention rather than limiting the invention, in the spirit and right of the present invention
It is required that protection domain in, to any modifications and changes for making of the present invention, both fall within protection scope of the present invention.
Claims (9)
1. a kind of adjustable ring presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, including clamper cylinder, positioned at clamping
The rubber bush of device inner barrel and it is connected to the inlet annular adapter at clamper cylinder both ends and liquid outlet annular turns
Device is connect, the both ends of the rubber bush are equipped with import rock core and come directly towards and export rock core top, set on the clamper cylinder lateral wall
There are inlet and exhaust outlet, which is characterized in that the rubber bush is by the different outer layer rubber sleeve of internal diameter and internal layer rubber
The annular barrel that sleeve combination forms, the both ends of rubber bush are set as 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 of sealing, outer layer rubber sleeve with it is interior
Layer rubber bush and circular filter net block to form inner layer ring pressure chamber, inner layer ring pressure intracavitary filling porous media；Porous Jie
The permeability of matter is less than the permeability of rock core to be measured；The internal layer rubber bush comes directly towards and exports rock core top shape with import rock core
Into the seal rock chambers of the heart, for placing rock core to be measured；Feed liquor is equipped on the inlet annular adapter and import rock core top
Liquid outlet is equipped on mouth and exhaust outlet, the liquid outlet annular adapter and outlet rock core top.
2. a kind of adjustable ring as described in claim 1 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, feature
Be, the annular end face of the inlet annular adapter, the liquid outlet annular adapter annular end face, it is described into
The concentric same ring that multilayer is interconnected is equipped on the inner face of mouth rock core top and the inner face of the outlet rock core top
Groove.
3. a kind of adjustable ring as described in claims 1 or 2 any one presses the Oil in Super-low Permeability rock core folder of continuous non-uniform Distribution
Holder, which is characterized in that back-pressure valve is equipped at the liquid outlet of the liquid outlet annular adapter.
4. a kind of adjustable ring as claimed in claim 3 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, feature
It is, the outer wall of the liquid outlet annular adapter is connect with the inner wall of clamper cylinder, the inner wall of liquid outlet annular adapter
It is connect with the outer wall of outlet rock core top.
5. a kind of adjustable ring as claimed in claim 4 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, feature
It is, the outer wall of the liquid outlet annular adapter is equipped with external screw thread, and inner wall is equipped with internal thread, and the external screw thread is with being set on institute
The internal thread stated on clamper cylinder inboard wall is connected, the internal thread and the outer spiral shell on the outlet rock core top outer wall
Line 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, which is characterized in that the outer wall of the inlet annular adapter is connect with the inner wall of clamper cylinder, feed liquor
The inner wall of choma shape adapter is connect with the outer wall that import rock core comes directly towards.
7. a kind of adjustable ring as claimed in claim 6 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, feature
It is, the outer wall of the inlet annular adapter is equipped with external screw thread, and inner wall is equipped with internal thread, and the external screw thread is with being set on institute
The internal thread stated on clamper cylinder inboard wall is connected, the internal thread and the outer spiral shell on the outer wall of import rock core top
Line is connected.
8. a kind of adjustable ring as claimed in claim 7 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, feature
It is, the inlet 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 presses the Oil in Super-low Permeability core holding unit of continuous non-uniform Distribution, feature
It is, the length of the rock core chamber is less than the length of 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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| CN109342277B (en) * | 2018-10-19 | 2021-01-01 | 中国石油天然气股份有限公司 | Rock core holder and reverse imbibition experimental device 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 |
| CN110887766B (en) * | 2019-11-01 | 2022-05-06 | 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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| CN105223122A (en) * | 2015-10-30 | 2016-01-06 | 南通市飞宇石油科技开发有限公司 | A kind of bolt-type core holding unit |
| CN205404287U (en) * | 2016-03-22 | 2016-07-27 | 西南石油大学 | Mechanical type simulation sleeve pipe confined pressure test device |
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