CN107462509B - A kind of gas permeability rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores - Google Patents
A kind of gas permeability rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores Download PDFInfo
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- CN107462509B CN107462509B CN201710709606.6A CN201710709606A CN107462509B CN 107462509 B CN107462509 B CN 107462509B CN 201710709606 A CN201710709606 A CN 201710709606A CN 107462509 B CN107462509 B CN 107462509B
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- 239000011435 rock Substances 0.000 title claims abstract description 57
- 230000035699 permeability Effects 0.000 title claims abstract description 34
- 239000010985 leather Substances 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
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- Dispersion Chemistry (AREA)
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Abstract
The present invention provides a kind of gas permeability rock core grasping systems suitable for more specification Oil in Super-low Permeability rock cores, including confining pressure chamber open at one end, the permeation chamber intracavitary with confining pressure is mounted on, permeation chamber includes the tubular leather sheath of both ends open and the seal plug for closing off leather sheath downstream, the exhaust pipe that the other end is pierced by by chassis is welded to connect with the gas off-take on the chassis of activity closing confining pressure chamber open at one end and one end and seal plug.Present invention can ensure that leak source is reduced as far as possible when measurement major diameter sample, meanwhile, when measuring minor diameter sample, by O-ring and thread seal, it also can guarantee good sealing effect while easy to assembly.Thus, realize matching for two-stage or stepped diameters, without increasing additional plug and volume, reduce the dismounting again and installation that plug is connected with exhaust pipe, the variable for reducing test and calculating, saves the time, reduces the risk of gas leakage, and gas circuit volume remains constant, Data Processing in Experiment is not allowed error-prone.
Description
Technical field
The present invention relates to petroleum works field, in particular to a kind of gas that can measure different size Oil in Super-low Permeability rock core, which is surveyed, to be seeped
Saturating rate rock core grasping system.
Background technique
Rock permeability is the important parameter and index of reservoir properties research, evaluation of formation damage, Reservoir Development design.
Shale gas reservoir reservoir permeability is very low, is an important factor for influencing ultimate recovery.Using liquid survey or the side of steady state test
It is millidarcy or less (1md=9.87 × 10 that method, which measures permeability,-16m2) sample take long time and the weak precision of signal is difficult to protect
Card.Therefore, transient state air testing method is generally mostly used to be measured,
By the way of measuring device is blocked using both ends, internal rock core to be measured is measured, which uses two
Small cavity design is held, uses the structure detachably installed between all parts, once there are small in any one place in gas circuit
Leak source, then may cause the significant changes of pressure, influence final measurement result.
Existing measuring device tie point is more, when replacing the rock core of different size different lengths, requires disassembly and surveys
The corresponding tie point of equipment is measured, then carries out mating installation, frequent disassembly may cause seal fitting and faster fail or leakproofness
Can decline, such as the replacement of both ends plug, the replacement etc. of exhaust pipe, these behaviors all be easy to cause then that damage or internal pressure are let out
Leakage.
Summary of the invention
The invention aims to provide a kind of to be suitable for different-diameter, different length Oil in Super-low Permeability rock core and reduce to the greatest extent can
The gas permeability rock core grasping system of detaching structure.
Particularly, the present invention provides a kind of gas permeability rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores,
Include:
Confining pressure chamber is circular cavity open at one end, is provided with gas vent on not opening end；
Permeation chamber is mounted on the inside of the confining pressure chamber, the tubular leather sheath including both ends open, and closes off under leather sheath
Swim end seal plug, be provided on the seal plug axially through gas off-take；
The open at one end of the confining pressure chamber is closed in chassis, activity, be provided with to the intracavitary water filling of the confining pressure water inlet and
To the prominent fixed plug to close the leather sheath upstream end in side, be provided at fixed plug axially through air inlet
Road；
Gas off-take on exhaust pipe, one end and the seal plug is welded to connect, and the other end is pierced by by the chassis, in institute
The through-hole for being provided on chassis and stretching out for the exhaust pipe is stated, is successively pacified in the side in the through-hole towards the intracavitary portion of the confining pressure
Equipped with stainless steel washer, O-ring and pressing plate, the pressing plate is fixed by bolt and the chassis.
In an embodiment of the invention, constant temperature circulating pipe, the constant temperature circulating are installed the confining pressure is intracavitary
Pipe is intracavitary by confining pressure chamber chassis one end insertion confining pressure relatively, again by the confining pressure after being uniformly distributed with spiral shape
The insertion end of chamber is stretched out.
In an embodiment of the invention, it is set respectively in the opposite one side of the fixed plug and the seal plug
It is equipped with tapped groove, the groove is used to install the movable drain plug for blocking different-diameter rock core to be measured, and the activity is stifled
Head is provided with and the air intake duct and gas off-take company by being threadably mounted in the groove, and in the movable drain plug
Logical stomata.
In an embodiment of the invention, the diameter of the movable drain plug is less than the seal plug and the fixation
The diameter of plug, and the seal plug and the diameter of the fixed plug are corresponding with the core diameter to be measured of maximum gauge.
It in an embodiment of the invention, further include sprue for filling the groove, the sprue passes through spiral shell
Line twist in the groove, the sprue include be provided with the connection sprue that stomata is connected to the air intake duct or gas off-take, and
Solid closure sprue.
In an embodiment of the invention, in the fixed plug and the seal plug and the movable drain plug
On the contact surface that on the contact surface and chassis is contacted with the confining pressure chamber, it is respectively arranged with seal groove, in the seal groove
Sealing strip is inside installed.
In an embodiment of the invention, the diameter of the rock core to be measured is 1.0~1.5 inches.
In an embodiment of the invention, it is contacted in the leather sheath with the fixed plug and the seal plug
Outside, setting are improved the clip of fastening effect.
In an embodiment of the invention, the temperature for detecting the intracavitary water temperature of confining pressure is installed on the chassis
Sensor, and the confining pressure sensor of the detection confining pressure chamber internal pressure.
Confining pressure chamber of the invention is only open at one end, while the caliber of exhaust pipe is unified and use to be welded and fixed, it is possible to reduce
The problem of potential leak source existing for existing measuring device leads to internal pressure significant changes more improves measurement accuracy and replacement is surveyed
Try efficiency when object.
Present invention can ensure that leak source is reduced as far as possible when measurement major diameter sample, meanwhile, when measuring minor diameter sample, lead to
O-ring and thread seal are crossed, also can guarantee good sealing effect while easy to assembly.Hereby it is achieved that two-stage or multistage straight
Diameter matches, and without increasing additional plug and volume, reduces dismounting again and installation that plug is connected with exhaust pipe,
The variable for reducing test and calculating, saves the time, reduces the risk of gas leakage, and gas circuit volume remains not
Become, Data Processing in Experiment is not allowed error-prone.
Detailed description of the invention
Fig. 1 is gas permeability rock core grasping system structural schematic diagram according to an embodiment of the invention.
Specific embodiment
As shown in Figure 1, one embodiment of the invention provides a kind of gas permeability suitable for more specification Oil in Super-low Permeability rock cores
Rock core grasping system, the gas permeability rock core grasping system generally include confining pressure chamber 10, permeation chamber 20, chassis 30 and row
Tracheae 40.
The confining pressure chamber 10 is circular cavity open at one end, be provided on not opening end for installing permeation chamber 20
Gas vent 11.
30 activity of chassis is enclosed in the open at one end of confining pressure chamber 10, so that confining pressure chamber 10 forms a closed environment,
The water inlet 31 filled the water into confining pressure chamber 10 is provided on chassis 30.Chassis 30 can pass through bolt one kind fixing piece and confining pressure
Chamber 10 is fixed.Furthermore, it is possible to which the seal groove 32 of annular is arranged, then exists on the contact surface that chassis 30 is contacted with confining pressure chamber 10
Sealing strip 33 is installed, to improve the sealing effect between chassis 30 and confining pressure chamber 10 in seal groove 32.
The permeation chamber 20 is mounted on the inside of confining pressure chamber 10, has certain interval, including two with the inner sidewall of confining pressure chamber 10
End opening clamps the tubular leather sheath 21 of rock core 50 to be measured with circumference, and closes under the fixed plug 22 of 21 upstream end of leather sheath, closing
Swim end seal plug 23, be respectively arranged in fixed plug 22 and seal plug 23 axially through 221 He of air intake duct
Gas off-take 231, the air intake duct 221 and gas off-take 231 are for being connected to permeation chamber 20 and confining pressure chamber 10.It is fixed in present embodiment
Plug 22 and chassis 30 are integrated setting, are protruded and are formed by the side on chassis 30, are detachably connected a little with reducing.
The exhaust pipe 40 is made of an independent pipe, one end be located in confining pressure chamber 10 and on seal plug 23
Gas off-take 231 is welded to connect, and the other end is after bending by being pierced by chassis 30 in confining pressure chamber 10.Exhaust pipe 40 is complete using whole section
Pipeline is attached directly to the mode of external valve, intermediate without the processing such as splicing, variable diameter.Above structure can be reduced because of rock to be measured
The heart 50 is highly different and carries out brought leakage point increase and volume increase problem when pipeline combination or splicing.
For convenience of the adjustment of exhaust pipe 40, it is logical by what is stretched out in confining pressure chamber 10 that discharge hoses 40 can be set on chassis 30
Support ring 41, O-ring 42 and pressing plate 43 are successively installed towards the side inside confining pressure chamber 10 in through-hole 34 in hole 34, and pressing plate 43 is logical
It crosses bolt and chassis 30 is fixed.When exhaust pipe 40 needs to adjust fixed position according to the height of testing rock core 50, can unscrew
Bolt slides 40 opposing through-bores 34 of exhaust pipe.After adjusting in place, then bolt is tightened, utilizes the squeezing to O-ring 42 of pressing plate 43
The sealing of exhaust pipe 40 is fixed at through-hole 34 by pressure.Present embodiment can lead under the effect of the screwing force on bolt and chassis 30
It crosses pressing plate 43 and support ring 41 compresses O-ring 42, fill up the hole between chassis 30 and exhaust pipe 40, in order to avoid cause confining pressure water body
Leakage and confining pressure decline or cannot keep.
Since exhaust pipe 40 with the gas off-take 231 on seal plug 23, when adjusting, is vented using being welded and fixed
Pipe 40 can be with 23 synchronizing moving of seal plug, and then reduces connection structure, and reducing leakage may.
Experiment when, will rock core 50 to be measured be inserted into leather sheath 21 in, with seal plug 23 close leather sheath 21 downstream, then by
The open end of confining pressure chamber 10 is put into confining pressure chamber 10, is sealed the open end of confining pressure chamber 10 using chassis 30, while being made fixed stifled
The upstream end of first 22 insertion leather sheath 21, then adjusts the position that exhaust pipe 40 is pierced by chassis 30 according to the height of rock core 50 to be measured,
Then it is sealed against fixing.
It is filled the water by the water inlet 31 on chassis 30 into confining pressure chamber 10, the air in confining pressure chamber 10 is by confining pressure chamber 10
Gas vent 11 is discharged, and after gas drains, can use valve and closes gas vent 11, is applied by hydraulic pressure pressurization to permeation chamber 20
Add confining pressure, the pressure in confining pressure chamber 10 is made to be greater than 3MPa or more compared with pressure in exhaust pipe 40.
It is inflated by the air intake duct 221 on chassis 30, high pressure gas enters rock core 50 to be measured, and high pressure gas is by treating
The infiltration for surveying rock core 50 is permeated by the lower to upper part of rock core 50 to be measured, finally enters gas off-take by the upper end of rock core 50 to be measured
231 and exhaust pipe 40, it is then discharged outside confining pressure chamber 10 by exhaust pipe 40, accommodates equipment into corresponding.
The certain gas pressure difference in 50 both ends of rock core to be measured is given by carving at the beginning, then measures pressure in gas replenishment process
The attenuation curve of difference at any time, and then permeability can be calculated.In test process, the decaying of upstream and downstream pressure difference at any time is bent
Line is direct measured value, and permeability value is foundation pressure attenuation curve at any time, the result calculated according to certain flow model.
In general, in same 50 size of rock core to be measured (length and area of section), cavity volume, temperature, test gas
Under the conditions of body and initial differential pressure, the rate that pressure changes over time is faster, and permeability is higher.Therefore, for Oil in Super-low Permeability sample and
Speech, the rate that pressure difference changes over time are relatively low.The permeability of sample directly determine in the unit time gas by
Survey the gas flow that 50 upstream of rock core reaches 50 downstream of rock core to be measured.In addition to this, the size of upstream and downstream cavity is also to pressure difference
Rate of change has an impact.The gas flow that the hyposmosis sample unit time passes through is small, in order to guarantee letter that pressure difference changes over time
It is number obvious enough, need the volume by upstream and downstream cavity to be designed sufficiently small, to guarantee that small gas flow variation becomes in pressure value
There is reflection apparent enough in change.The confining pressure chamber of present embodiment is only open at one end, reduces by a detachment point, and the peace of exhaust pipe
The problem of assembling structure can reduce potential leak source existing for existing measuring device mostly and lead to internal pressure significant changes.
In an embodiment of the invention, constant temperature circulating pipe 12, the constant temperature circulating can be installed in confining pressure chamber 10
Pipe 12 is protruded into confining pressure chamber 10 by confining pressure chamber 10 with respect to 30 one end of chassis, and outer be trapped among in confining pressure chamber 10 around permeation chamber 20 is formed
It is drawn again by inserting end after being uniformly distributed.The pipeline unified using caliber of constant temperature circulating pipe 12, in confining pressure chamber 10 twist
Around distribution, uniformly to be heated to the water in confining pressure chamber 10, the required temperature constant state of experiment is kept it in, perseverance is passed through
Tepidarium guarantees that temperature is constant at rock core 50 to be measured, can eliminate influence of the temperature change to gas and confining pressure pressure, to protect
Demonstrate,prove the stability of calculated result.It is distributed using helical form pipeline, is also convenient for space layout, increase heat exchange area, be conducive to confining pressure
The temperature of water body is stablized.
In an embodiment of the invention, the temperature that water temperature in detection confining pressure chamber 10 can be installed on chassis 30 passes
Sensor 35, and the confining pressure sensor 36 of detection 10 internal pressure of confining pressure chamber.
In an embodiment of the invention, for convenience of the rock core to be measured for testing different-diameter, in 22 He of fixed plug
Seal plug 23 it is opposite be respectively arranged with tapped groove 24 on one side, which is used to install the activity of different-diameter
Plug 25, the diameter of movable drain plug 25 are less than the diameter of fixed plug 22 and seal plug 23, the shape of movable drain plug 25 with it is close
The shape of block head 23 and fixed plug 22 is corresponding, is only provided with one with externally threaded cylinder in upper surface.Current
When the diameter of rock core 50 to be measured is less than seal plug 23 and the diameter of fixed plug 22, then the activity that can choose respective diameters is stifled
First 25, it is screwed in the groove 24 on seal plug 23 and fixed plug 22 using cylinder, is both provided in each movable drain plug 25
With the air intake duct 221 and the stomata 251 that is connected to of gas off-take 231 in fixed plug 22 and seal plug 23.When in use, it will only live
Sealing is realized at the both ends of dynamic 25 partial insertion leather sheath 21 of plug, installation posterior spiracle 251 respectively with air intake duct 221 and gas off-take 231
Connection.
In present embodiment, fixed plug 22 it is identical with the diameter of seal plug 23 and be greater than movable drain plug 25, and with can
The diameter of the rock core to be measured 50 of the maximum gauge of test is corresponding.By taking the rock core of 1.5 inches and 1.0 inches two kinds of diameters as an example, Gu
The diameter for determining plug 22 and seal plug 23 is respectively 1.5 inches, and the diameter of movable drain plug 25 is then 1.0 inches, when test 1.5
When the rock core of inch, directly the both ends of leather sheath 21 can be sealed with fixed plug 22 and seal plug 23.When testing 1.0 English
When very little rock core, movable drain plug 25 can be screwed in the groove 24 of fixed plug 22 and seal plug 23, utilize movable drain plug 25
Leather sheath 21 is directly sealed, fixed plug 22 and seal plug 23 are located at outside the port of leather sheath 21 under this state.
When using the plug of different-diameter, corresponding position can change, at this time, it is only necessary to which adjusting exhaust pipe 40 makes it
It is gone up and down with the position of seal plug 23, after being adjusted in place, then the junction on exhaust pipe 40 and chassis 30 is sealed fixation.
In the prior art, the rock core of measurement is not only diametrically different, and also different in length, therefore, design has
The seal plug 23 and exhaust pipe of different length, consider the requirement of resistance to high confining pressure, existing Design of Exhaust Manifold it is relatively thick, do not have
Good flexibility, and need to carry out volume calibration to the seal plug of different length 23 and exhaust pipe in advance.In addition, volume is
One of the input parameter of permeability is calculated, therefore also needs to pay attention to preventing in gas circuit volume use in calculating permeability process
Obscure.
Exhaust pipe 40 and seal plug 23 are welded and fixed present embodiment, can not change or dismantle original structure
In the case of, by vertical direction while mobile, the rock core to be measured 50 of Lai Shiying different length.Using integrated exhaust
Pipe, can keep the constancy of volume of exhaust pipe 40 while reducing leakage point, reduce and demarcate number, by with movable drain plug 25
Cooperation is suitable for the testing rock core 50 of different-diameter and length, avoids surveying in the rock core to different-diameter and length in the prior art
When examination, the structure design of seal plug 23 is needed replacing, structure design and disassembly process is simplified, reduces the possibility of leakage.
In addition, annular can be set on the contact surface that fixed plug 22 and seal plug 23 are contacted with movable drain plug 25
Seal groove, and O-ring is installed, by the clamping of two plug end faces, realize sealing.
Using design of the invention, it is ensured that leak source is reduced as far as possible when measurement major diameter sample, meanwhile, it measures small straight
When diameter sample, by O-ring and thread seal, good sealing effect also can guarantee while easy to assembly.Hereby it is achieved that two
Grade or stepped diameters match, and without increasing additional plug and volume, reduce plug and connect again with exhaust pipe
Dismounting and installation, reduce the variable of test and calculating, save the time, reduce the risk of gas leakage, and gas circuit body
Product remains constant, and Data Processing in Experiment is not allowed error-prone.
In addition, when the rock core 50 to be measured of measurement different length, it is only necessary to unclamp the sealing on chassis 30 when installation
Structure, exhaust pipe 40 can up and down adjustment position, the fastening seal structure again after vertical position determines.In test, bottom
Sufficient space must be reserved below disk 30, to guarantee the downlink spatial of exhaust pipe 40.
When fixed plug 22 and seal plug 23 is used alone, to avoid groove 24 from increasing gas circuit volume, can be set
One is used to fill the sprue of groove 24, and external screw thread is arranged in sprue outer surface, and shape is corresponding with the size of groove 24, works as sprue
After being screwed into groove 24, the flush of bottom surface and fixed plug 22 and seal plug 23.Sprue may include setting stomata
Structure connection sprue, and be not provided with the closure sprue of air hole structure, the sprue of two kinds of structures can be used for different experiments
In.
To improve sealing effect, corresponding clip can be installed at the both ends of leather sheath 21, when fixed plug 22 and sealing
After plug 12 or movable drain plug 25 are inserted into leather sheath 21, using clip by the end banding of leather sheath 21, to reduce leakage.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (8)
1. a kind of gas permeability rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores characterized by comprising
Confining pressure chamber is circular cavity open at one end, is provided with gas vent on not opening end；
Permeation chamber is mounted on the inside of the confining pressure chamber, the tubular leather sheath including both ends open, and closes off leather sheath downstream
Seal plug, be provided on the seal plug axially through gas off-take；
Chassis, activity close the open at one end of the confining pressure chamber, are provided with the water inlet to the intracavitary water filling of the confining pressure, He Xiangyi
The prominent fixed plug to close the leather sheath upstream end in side, be provided at fixed plug axially through air intake duct；
The fixed plug and the seal plug it is opposite be respectively arranged with tapped groove on one side, the groove is used
In installation block different-diameter rock core to be measured movable drain plug, the movable drain plug by being threadably mounted in the groove, and
The stomata being connected to the air intake duct and the gas off-take is provided in the movable drain plug；
Gas off-take on exhaust pipe, one end and the seal plug is welded to connect, and the other end is pierced by by the chassis, at the bottom
It is provided with the through-hole stretched out for the exhaust pipe on disk, is sequentially installed in the side in the through-hole towards the intracavitary portion of the confining pressure
Stainless steel washer, O-ring and pressing plate, the pressing plate are fixed by bolt and the chassis.
2. gas permeability rock core grasping system according to claim 1, which is characterized in that
Constant temperature circulating pipe is installed the confining pressure is intracavitary, the constant temperature circulating pipe is by the relatively described chassis one end of the confining pressure chamber
It is inserted into that the confining pressure is intracavitary, is stretched out again by the insertion end of the confining pressure chamber after being uniformly distributed with spiral shape.
3. gas permeability rock core grasping system according to claim 1, which is characterized in that
The diameter of the movable drain plug is less than the diameter of the seal plug and the fixed plug, and the seal plug and institute
The diameter for stating fixed plug is corresponding with the core diameter to be measured of maximum gauge.
4. gas permeability rock core grasping system according to claim 1, which is characterized in that
It further include the sprue for filling the groove, by being threaded onto the groove, the sprue includes the sprue
It is provided with the connection sprue and solid closure sprue that stomata is connected to the air intake duct or gas off-take.
5. gas permeability rock core grasping system according to claim 1, which is characterized in that
On the fixed plug and the seal plug and the contact surface of the movable drain plug and the chassis is enclosed with described
On the contact surface for pressing chamber contact, it is respectively arranged with seal groove, sealing strip is installed in the seal groove.
6. gas permeability rock core grasping system according to claim 1, which is characterized in that
The diameter of the rock core to be measured is 1.0~1.5 inches.
7. gas permeability rock core grasping system according to claim 1, which is characterized in that
In the outside that the leather sheath is contacted with the fixed plug and the seal plug, setting is improved the card of fastening effect
Hoop.
8. gas permeability rock core grasping system according to claim 1, which is characterized in that
The temperature sensor for detecting the intracavitary water temperature of confining pressure, and the intracavitary portion's pressure of the detection confining pressure are installed on the chassis
The confining pressure sensor of power.
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| CN201710709606.6A CN107462509B (en) | 2017-08-18 | 2017-08-18 | A kind of gas permeability rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709606.6A CN107462509B (en) | 2017-08-18 | 2017-08-18 | A kind of gas permeability rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores |
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| CN107462509A CN107462509A (en) | 2017-12-12 |
| CN107462509B true CN107462509B (en) | 2019-11-22 |
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| CN109856033B (en) * | 2019-02-25 | 2020-05-19 | 中国地质大学（北京） | Adjustable rock core holder |
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| US6971260B2 (en) * | 2004-01-13 | 2005-12-06 | Coretest Systems, Inc. | Overburden rock core sample containment system |
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