CN109342138A - The artificial shale core production method of densification and its molding die for having stratification - Google Patents
The artificial shale core production method of densification and its molding die for having stratification Download PDFInfo
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- CN109342138A CN109342138A CN201811248089.8A CN201811248089A CN109342138A CN 109342138 A CN109342138 A CN 109342138A CN 201811248089 A CN201811248089 A CN 201811248089A CN 109342138 A CN109342138 A CN 109342138A
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- chunking
- molding die
- shale core
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- artificial
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
The present invention relates to a kind of artificial shale core production method of densification for having stratification and its molding dies, cement, quartz sand, clay and water are stirred, add defoaming agent stirring, lubricating oil is applied in molding die inner wall, in mixture injection moulding mold and stir evenly, then it is compacted, final setting time to be achieved, applies epoxy resin and curing agent in test specimen upper surface；Successively interval pours from the bottom up, completes filling of the mixture to molding die.Molding die include middle part be equipped with vertically through accommodating space and at least two layers of the chunking that can vertically splice and the pedestal that the accommodating space of bottom chunking can be blocked, accommodating space can be aligned after adjacent two layers chunking splicing, adjacent two layers chunking is by groove and the projection cube structure splicing of end and stitching portion is sealed by sealing element, and adjacent two layers chunking is removably fixed by the connector on lateral surface.The artificial shale core that this method obtains has the lithologic character of low-porosity, can carry out shale pressure break related experiment.
Description
Technical field
The invention belongs to shale gas development technique fields, and in particular to be a kind of artificial shale core of densification for having stratification
Production method and its molding die.
Background technique
Shale gas is that a kind of main body is located in dark-coloured mud shale or high-carbon mud shale, is mainly to deposit with absorption or free state
In the Unconventional gas of mode, ingredient has the spies such as oil and gas migration distance is shorter, gas-bearing area distribution is wide based on methane
Point.As U.S.'s shale gas revolution realizes the large-scale commercial exploitation of shale gas gas reservoir, countries in the world start gradually to pay attention to
Development and utilization to shale gas.
China's shale gas stock number is abundant.Different from the U.S., depth, porosity are low, permeate in the presence of burying for China's shale reservoir
Rate is small, stratification is complicated, generally higher feature, exploitation exploitation difficulty are big for clay content.Currently, obtaining in actual production process
Shale core approach is more difficult, laboratory experiment use shale core be mostly quartz sand and cement pour by a certain percentage and
At there is stronger homogenieity and operability, but can not effectively reflect shale clay mineral characteristic, while lacking shale stratification
The artificial core of structure can not carry out the correlative study that bedding architecture influences mechanical properties of rock.
Application No. is 201410260860.9 Chinese invention patents, disclose a kind of system of joint property shale artificial core
Preparation Method.This method is that have certain fracture development, stratification development, brittle artificial core in order to obtain, simulates joint property page
Lithology matter, but existing fine and close shale reservoir a wide range of for China, do not have certain fractue spacing, and do not design exact
Form rock core mold.
From the foregoing, it will be observed that conventional artificial's rock core existing many limitations and drawback during the experiment, it is difficult to really reflect page
Rock rock core is unfavorable for the verifying and further research of shale gas exploitation correlation theory in physical subsurface mechanical characteristic.
Summary of the invention
The object of the present invention is to provide a kind of artificial shale core production method of densification for having stratification and its molding die,
The artificial shale core that this method obtains includes different angle stratification, and interlayer is connected by epoxy resin and curing agent are cementing, is had
The lithologic character of low-porosity, it is similar to the widely distributed fine and close shale reservoir physical property in China, it can accurately embody China's shale
The mechanical characteristic of gas reservoir can preferably carry out shale pressure break related experiment in the case where not obtaining live shale core,
The further influence of the construction fracture crack initiation of research stratification and expansion.
The technical scheme adopted by the invention is that:
A kind of artificial shale core production method of densification having stratification, comprising steps of
S1, by cement, quartz sand, clay and water uniform stirring in proportion；
S2, the mixture into S1 are added defoaming agent, then are sufficiently stirred；
S3, one layer of lubricating oil is applied in molding die inner wall, will be stirred in the mixture injection moulding mold in S2 and sufficiently
It is even, it is then compacted using compacting component, the test specimen in mold to be formed reaches the final setting time of 600min, on the test specimen of condensation
Surface applies one layer of epoxy resin and curing agent；
S4, S3 is repeated, successively interval pours from the bottom up, filling of the mixture in S2 to molding die is completed, wait try
Part is completely dried molding, and intensity needed for reaching experiment can be obtained artificial shale core.
Preferably, in S1, cement, quartz sand, clay and water mass ratio be 1: 3: 0.2: 0.6, the clay of clay
Mineral constituent is mainly kaolinite or montmorillonite.
Preferably, in S1, cement is P.C 52.5R type, and the granularity of quartz sand is 80~120 mesh；In S2, defoaming agent
For cement mortar defoamer, it is distributed after being reacted by polyethers with fatty alcohol through hydrophobic；In S3, curing agent is solid for amine
Agent.
Preferably, in S3, during sufficiently stirring evenly, be stirred using hand-held concrete mortar mixer, at
Pattern has interior mixture surface and does not generate bubble, and stirring evenly process terminates.
A kind of molding die of artificial shale core, including middle part be equipped with vertically through accommodating space and can vertically spell
At least two layers of the chunking connect and the pedestal that can block the accommodating space of bottom chunking accommodate empty after adjacent two layers chunking splicing
Between can be aligned, adjacent two layers chunking is by the groove of end and projection cube structure splicing and stitching portion is by sealing element sealing, adjacent
Two layers of chunking is removably fixed by the connector on lateral surface.
Preferably, connector is connecting rod and connecting plate, and connecting plate is equipped with the connecting hole that can cooperate with connecting rod, connection
Bar is located in at least one pair of outer side of chunking, and the connecting hole on the same connecting plate can be with the connecting rod in adjacent two layers chunking
Cooperation.
Preferably, base upper surface is equipped with the groove structure cooperated with the bottom surface of bottom chunking.
Preferably, the number of plies of chunking is layer 2-4, and adjacent two layers chunking Mosaic face tilt angle is 0 ° -45 °.
Preferably, chunking lateral surface is equipped with handle or can be as the groove structure of handle.
Preferably, compacting component includes the fixed link being located in at least one pair of outer side of at least one chunking, two energy
The fixed frame that is surrounded from molding die two sides, can by fixing piece that two fixed frames when surrounding are detachably fixed, can be surrounded
When two fixed frames positioning screw rod for being clamped on nut block right above top chunking, being threadedly engaged with nut block, screw rod
Top is equipped with swing handle, bottom end is equipped with the pressing plate cooperated with accommodating space, and fixed frame, which is equipped with, to be consolidated with what fixed link cooperated
Determine hole, fixation hole can cooperate with the fixed link at least one pair of outer side when two fixed frames surround.
The beneficial effects of the present invention are:
The artificial shale core that this method obtains includes different angle stratification, and interlayer is by epoxy resin and the cementing phase of curing agent
Even, have the lithologic character of low-porosity, it is similar to the widely distributed fine and close shale reservoir physical property in China, it can accurately embody me
The mechanical characteristic of state's shale gas reservoir can preferably carry out shale pressure break phase in the case where not obtaining live shale core
Experiment is closed, the influence of stratification construction fracture crack initiation and expansion is further studied.
Detailed description of the invention
Fig. 1 is the schematic diagram (three layers, do not include pedestal) of molding die in the embodiment of the present invention one.
Fig. 2 is the cross-sectional view (three layers, do not include pedestal) of molding die in the embodiment of the present invention one.
Fig. 3 is perspective view after the fractionation of molding die in the embodiment of the present invention one (three layers, do not include pedestal).
Fig. 4 is the stereoscopic schematic diagram of the single chunking of molding die in the embodiment of the present invention one.
Fig. 5 is the stereoscopic schematic diagram of the pedestal of molding die in the embodiment of the present invention one.
Fig. 6 is the schematic diagram that component is compacted in the embodiment of the present invention one.
Fig. 7 is the cross-sectional view that component is compacted in the embodiment of the present invention one.
Fig. 8 is that perspective view after the fractionation of component is compacted in the embodiment of the present invention one.
Fig. 9 is perspective view when two fixed frames of compacting component in the embodiment of the present invention one surround.
Figure 10 is the perspective view that the nut block of component is compacted in the embodiment of the present invention one.
Figure 11 is the operation schematic diagram that component is compacted in the embodiment of the present invention one.
Figure 12 is schematic diagram when adjacent two layers chunking Mosaic face tilts in the embodiment of the present invention two.
Figure 13 is the artificial shale core that the embodiment of the present invention one makes.
In figure: 1- accommodating space；2- chunking；Groove structure of the 3- as handle；4- connecting plate；5- connecting rod；6- pedestal；
The groove structure that 7- and the bottom surface of bottom chunking cooperate；8- swing handle；9- screw rod；10- fixed plate；11- nut block；
12- fixed frame；13- pressing plate；14- fixation hole；Nut block is positioned the part of clamping by 15-；The bolt of 16- and fixed plate cooperation
Hole；The threaded hole of 17- and screw rod cooperation；18- annular groove；19- fixed link；The main body of the artificial shale core of 20-；The artificial page of 21-
The stratification of rock rock core.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
A kind of artificial shale core production method of densification having stratification, comprising steps of S1, by cement, quartz sand, clay
With water uniform stirring in proportion；S2, the mixture into S1 are added defoaming agent, then are sufficiently stirred；S3, in molding die inner wall
Applying one layer of lubricating oil, (lubricating oil can prevent mixture and molding die inner wall from adhering to, convenient for the demoulding after molding die
Dismantlement work keeps the uniform complete of prepared artificial shale core wall surface), by the mixture injection moulding mold in S2 simultaneously
It sufficiently stirs evenly, is then compacted using compacting component, the test specimen in mold to be formed reaches final setting time (enough ends of 600min
The solidifying time can make filling and the compacting process of top mixture, will not influence the structure of lower part mixture), in the test specimen of condensation
Upper surface applies one layer of epoxy resin and curing agent；S4, S3 is repeated, successively interval pours from the bottom up, completes the mixture in S2
Filling to molding die is completely dried molding to test specimen, and intensity needed for reaching experiment can be obtained artificial shale core.
The artificial shale core that this method obtains includes different angle stratification, and interlayer is by epoxy resin and the cementing phase of curing agent
Even, have the lithologic character of low-porosity, it is similar to the widely distributed fine and close shale reservoir physical property in China, it can accurately embody me
The mechanical characteristic of state's shale gas reservoir can preferably carry out shale pressure break phase in the case where not obtaining live shale core
Experiment is closed, the influence of stratification construction fracture crack initiation and expansion is further studied.
Preferably, in S1, cement, quartz sand, clay and water mass ratio be 1: 3: 0.2: 0.6 (in order to make test specimen
Intensity is inventor contemplated and is simulated with standard cement mortar as close as natural rock sample intensity, because its intensity is just
In control the experiment has found that the compression strength of M30 cement mortar meets the requirements), the clay mineral component of clay is mainly kaolinite
Or montmorillonite is simulated more life-like since the mineral constituent of shale is mainly kaolinite and montmorillonite.Entirety realize from
Simulation of the intensity to component.
Preferably, in S1, cement is that (P.C indicates that composite Portland cement, 52.5R are intensity etc. to P.C 52.5R type
Grade), the composite Portland cement compatibility is good, and 52.5R is the cement model of the type maximum intensity, cementing can obtain intensity
Highest cement specimen, the granularity of quartz sand are 80~120 mesh, the available high strength cement test specimen of the quartz sand of high granularity；
In S2, defoaming agent is cement mortar defoamer, is distributed after being reacted by polyethers with fatty alcohol through hydrophobic, cement mortar
Defoaming agent can make gained cement specimen finer and close；In S3, curing agent is amine curing agent, can under amine curing agent room temperature
To form netted space polymers with epoxy resin fast reaction, the weak cementing status between adjacent layer mixture is realized, simulation is real
Physico-mechanical properties in the stratum of border between stratification.
Preferably, in S3, during sufficiently stirring evenly, be stirred using hand-held concrete mortar mixer, at
Pattern has interior mixture surface and does not generate bubble, and stirring evenly process terminates.
As shown in Figures 1 to 5, in example 1, the molding die of artificial shale core include middle part be equipped with vertically pass through
(accommodating space 1 is generally cylindric, and diameter is identical as the manufactured diameter of artificial core is intended to, all accommodatings for logical accommodating space 1
Space 1 be connected after total height be slightly above be intended to made of artificial core height) and at least two layers of the chunking 2 that can vertically splice
With the accommodating space 1 of bottom chunking 2 can be blocked pedestal 6 (pedestal 6 can with bottom chunking 2 be an entirety, can also
Individually to separate, preferably individually separate, in this case, test specimen facilitated to take out), 1 energy of accommodating space after adjacent two layers chunking 2 is spliced
Alignment, adjacent two layers chunking 2 pass through sealing element sealing (sealing element energy by the splicing of groove and projection cube structure and stitching portion of end
Prevent the mixture in upper layer accommodating space 1 from overflowing by gap, general to select rubber coil), adjacent two layers chunking 2 passes through outer
Connector on side is removably fixed.Molding die is easy to operate, processing convenience, low in cost, convenient for quickly preparing mould
The artificial shale core of quasi- practical shale reservoir characteristics.
As depicted in figs. 1 and 2, in example 1, connector is connecting rod 5 and connecting plate 4, and connecting plate 4 is equipped with energy
The connecting hole cooperated with connecting rod 5, connecting rod 5 are located in at least one pair of outer side of chunking 2, the company on the same connecting plate 4
The connecting rod 5 connect in Kong Nengyu adjacent two layers chunking 2 cooperates.Certainly, it can be also attached with fastener is directlyed adopt.
As shown in figure 5, in example 1,6 upper surface of pedestal is equipped with the groove cooperated with the bottom surface of bottom chunking 2
Structure 7 prevents molding die from sliding in 6 upper surface of pedestal.
As depicted in figs. 1 and 2, in example 1,2 lateral surface of chunking be equipped with can be as the groove structure 3 of handle.When
So, can also with directly adopt handle.
Embodiment one is the Basic Design structure of molding die, and certainly, embodiment two as shown in figure 12 can also basis
Requirement of experiment changes in following reasonable parameter area: the number of plies of chunking 2 is layer 2-4,2 Mosaic face of adjacent two layers chunking
Tilt angle is 0 ° -45 °.
As shown in Fig. 6 to Figure 11, in example 1, compacting component includes at least a pair for being located at least one chunking 2
(connecting rod 5 can replace as fixed link 20 fixed link 20 on lateral surface, only need connecting rod 20 in this way, certainly, fixed
Bar 20 can also be added on the basis of connecting rod 5), two fixed frames 12 that can be surrounded from molding die two sides, can will surround
When two fixed frames 12 be detachably fixed fixing piece, can by two fixed frames 12 when surrounding position be clamped on top group
Nut block 11 right above block 2, the screw rod 9 being threadedly engaged with nut block 11 are equipped with swing handle 8 at the top of screw rod 9, bottom end is equipped with
With the pressing plate 13 of accommodating space cooperation, fixed frame 12 is equipped with the fixation hole 14 that can cooperate with fixed link 20, two fixed frames 12
Fixation hole 14 can cooperate with the fixed link 20 at least one pair of outer side when surrounding.
As shown in Fig. 5, Fig. 9 and Figure 11, in example 1, fixed frame 12 be equipped with complete fixation hole 14 and or conjunction
The fixation hole 14 of the part of complete fixed rod aperture 14 could be formed when enclosing.Complete fixation hole 14 and partial fixation hole 14 are same
When setting if, can cooperate with the fixed link 20 on two pairs of lateral surfaces, can only be with consolidating in one pair of outer side if being separately provided
Fixed pole 20 cooperates.
As illustrated in fig. 7 and fig. 10, in example 1, annular groove 18 is equipped in the middle part of nut block 11, two fixed frames 12 close
It protrudes into when enclosing in annular groove 18 and is bonded with annular groove 18, position clamping from two sides by nut block 11.Certainly, annular groove 18 can be with
It replaces in the symmetrical groove structure of 11 on both sides of the middle of nut block.
As shown in Figure 6 to 8, in example 1, fixing piece is fixed plate 10 and bolt.It is, of course, also possible to directly adopt
It is attached with fastener.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of artificial shale core production method of densification for having stratification, it is characterised in that: including step,
S1, by cement, quartz sand, clay and water uniform stirring in proportion；
S2, the mixture into S1 are added defoaming agent, then are sufficiently stirred；
S3, one layer of lubricating oil is applied in molding die inner wall, will be stirred evenly in the mixture injection moulding mold in S2 and sufficiently, so
It is compacted afterwards using compacting component, the test specimen in mold to be formed reaches the final setting time of 600min, in the test specimen upper surface of condensation
Apply one layer of epoxy resin and curing agent；
S4, S3 is repeated, successively interval pours from the bottom up, completes filling of the mixture in S2 to molding die, complete to test specimen
White drying molding, intensity needed for reaching experiment can be obtained artificial shale core.
2. having the artificial shale core production method of densification of stratification as described in claim 1, it is characterised in that: in S1,
Cement, quartz sand, clay and water mass ratio be 1: 3: 0.2: 0.6, the clay mineral component of clay be mainly kaolinite or
Montmorillonite.
3. having the artificial shale core production method of densification of stratification as described in claim 1, it is characterised in that: in S1,
Cement is P.C 52.5R type, and the granularity of quartz sand is 80~120 mesh；In S2, defoaming agent is cement mortar defoamer, by gathering
Ether is distributed after reacting with fatty alcohol through hydrophobic；In S3, curing agent is amine curing agent.
4. having the artificial shale core production method of densification of stratification as described in claim 1, it is characterised in that: in S3,
It during sufficiently stirring evenly, is stirred using hand-held concrete mortar mixer, mixture surface does not produce in mold to be formed
Anger bubble, stirring evenly process terminates.
5. a kind of molding die of artificial shale core, it is characterised in that: including middle part be equipped with vertically through accommodating space
And at least two layers of the chunking that can vertically splice and the pedestal that can block the accommodating space of bottom chunking, adjacent two layers chunking are spelled
Connecing rear accommodating space can be aligned, and adjacent two layers chunking is by groove and the projection cube structure splicing of end and stitching portion passes through sealing element
Sealing, adjacent two layers chunking are removably fixed by the connector on lateral surface.
6. the molding die of artificial shale core as claimed in claim 5, it is characterised in that: connector is connecting rod and connection
Plate, connecting plate are equipped with the connecting hole that can cooperate with connecting rod, and connecting rod is located in at least one pair of outer side of chunking, same
Connecting hole on connecting plate can cooperate with the connecting rod in adjacent two layers chunking.
7. the molding die of artificial shale core as claimed in claim 5, it is characterised in that: base upper surface is equipped with and most bottom
The groove structure of the bottom surface cooperation of layer chunking.
8. the molding die of artificial shale core as claimed in claim 5, it is characterised in that: the number of plies of chunking is layer 2-4, phase
Adjacent two layers of chunking Mosaic face tilt angle is 0 ° -45 °.
9. the molding die of artificial shale core as claimed in claim 5, it is characterised in that: chunking lateral surface be equipped with handle or
Groove structure of the energy as handle.
10. the molding die of artificial shale core as claimed in claim 5, it is characterised in that: compacting component include be located to
Lack the fixed link in at least one pair of outer side of a chunking, two fixed frames that can be surrounded from molding die two sides, can will close
Fixing piece that two fixed frames when enclosing are detachably fixed can be positioned by two fixed frames when surrounding and be clamped on top chunking
The nut block of surface, the screw rod being threadedly engaged with nut block, screw tip are equipped with that swing handle, bottom end is equipped with and accommodating space
The pressing plate of cooperation, fixed frame be equipped with can with fixed link cooperate fixation hole, when two fixed frames surround fixation hole can at least
Fixed link cooperation in one pair of outer side.
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| CN201811248089.8A CN109342138A (en) | 2018-10-24 | 2018-10-24 | The artificial shale core production method of densification and its molding die for having stratification |
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| CN110082176A (en) * | 2019-04-11 | 2019-08-02 | 中国石油大学(北京) | The production method and stratification shale target of the stratification shale target of pre- board plug type |
| CN110421691A (en) * | 2019-08-14 | 2019-11-08 | 安徽省交通控股集团有限公司 | Bonding strength test model preparation method between Cement Concrete Deck Paving Course |
| CN114486142A (en) * | 2021-12-29 | 2022-05-13 | 中国飞机强度研究所 | Ice bullet system for impact resistance test of aircraft transparent cover body and manufacturing method |
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