CN110220756A - The preparation method of coal measures shale object mould test specimen and coal measures shale object mould test specimen - Google Patents
The preparation method of coal measures shale object mould test specimen and coal measures shale object mould test specimen Download PDFInfo
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- CN110220756A CN110220756A CN201910420055.0A CN201910420055A CN110220756A CN 110220756 A CN110220756 A CN 110220756A CN 201910420055 A CN201910420055 A CN 201910420055A CN 110220756 A CN110220756 A CN 110220756A
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- object mould
- rammell
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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
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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
- G01N1/36—Embedding or analogous mounting of samples
Abstract
The present invention relates to rock sample preparation technical fields, disclose the preparation method of a kind of coal measures shale object mould test specimen and coal measures shale object mould test specimen, the coal measures shale object mould test specimen (1) includes: object mould body, the object mould body includes the thickness direction arrangement along the object mould body and coal rock layer (10) fixed each other and rammell (12), the coal rock layer includes coal petrography thin layer (100), offers wellbore on object mould body；Simulation wellbore hole (11), the simulation wellbore hole are inserted in the wellbore；Hugger component (14), the hugger component is set in the coal rock layer, and the hugger component includes multiple the first osmotic tablets (140) for being configured to face cleat being inserted in the coal petrography thin layer and multiple the second osmotic tablets (142) for being configured to end hugger.The coal measures shale object mould test specimen has the first osmotic tablets and the second osmotic tablets, so as to effectively simulate the face cleat of the coal rock layer in coal measures shale, hold the natural structure of hugger.
Description
Technical field
The present invention relates to rock sample preparation technical fields, more particularly to coal measures shale object mould test specimen and coal measures shale object mould
The preparation method of test specimen.
Background technique
China possesses coal bed gas abundant (coal mine gas) resource and has huge potentiality to be exploited, in Sichuan Basin dragon's pool
In group coal-bearing series stratum, in addition to preservation has coal bed gas resource abundant, in Seam Roof And Floor country rock or closes on stratum and be associated with
The Unconventional gas such as shale gas abundant, compact sandstone gas resource equally have potentiality to be exploited.Currently, to coal measure strata coal
The understanding of the unconventional gas resources such as layer gas, shale gas, compact sandstone gas is also weaker, and resources exploration degree also all compares
It is lower.
Coal petrography system stratum is the bad ground that different kinds of rocks interlayer is combined with each other, and according to gas reservoir combination producing experience, can be incited somebody to action
Coal-bearing series stratum is regarded as an entirety.Stratification is bedded structure caused by rock vertically changes.Exist certainly in coal
Right crack, the mining crack circle Cheng Meizhong are " hugger ", and hugger is divided into two groups, i.e. face cleat and end hugger, they are mutually substantially
Vertically, and all orthogonal with coal seam level or steep angle is intersected.Face cleat is to extend longer main hugger, and hugger is held to extend by face
The restriction of hugger, hugger permeability have apparent anisotropy.
In stratiform coal measure strata, due to reservoir multiple superposed, variation of lithological difference is big on longitudinal direction, interlayer ground stress deviation,
Mechanical properties of rock, interface layer cementing strength, permeability etc. can all produce bigger effect the layer extension of wearing of hydraulic fracture, from
And it is unclear to wear layer propagation law understanding to payzone group fracturing fracture, increases reservoir reconstruction conceptual design difficulty, and therefore, laboratory
It is interior a layer extension mechanism to be worn to the fracturing fracture on coal petrography system stratum by preparing coal measures shale object mould test specimen and probe into.So
And existing coal measures shale object mould test specimen, can not effectively in simulation rock stratum development natural structure property, as coal seam is cut
Reason.
Summary of the invention
The purpose of the invention is to overcome existing coal measures shale object mould test specimen of the existing technology can not be effective
The problem of natural structure property such as coal seam hugger developed in simulation rock stratum, provide coal measures shale object mould test specimen, the coal measures page
Rock object mould test specimen has the first osmotic tablets for being configured to face cleat and is configured to the second osmotic tablets of end hugger, so as to effective
It simulates the face cleat of the coal rock layer in coal measures shale, hold the natural structure of hugger.
To achieve the goals above, one aspect of the present invention provides a kind of coal measures shale object mould test specimen, the coal measures shale object
Mould test specimen includes:
Object mould body, the object mould body include the thickness direction arrangement along the object mould body and fix each other
Coal rock layer and rammell, the coal rock layer include coal petrography thin layer, offer wellbore on the object mould body；
Simulation wellbore hole, the simulation wellbore hole are inserted in the wellbore；
Hugger component, the hugger component are set in the coal rock layer, and the hugger component includes being inserted in the coal
Multiple first osmotic tablets and multiple second osmotic tablets in rock thin layer, first osmotic tablets are configured to face cleat, and described second
Osmotic tablets are configured to end hugger.
In the above-mentioned technical solutions, multiple configurations of the coal petrography thin layer are inserted in by being arranged in the coal petrography thin layer
For face cleat the first osmotic tablets and it is multiple be configured to end hugger the second osmotic tablets, so as to effectively simulate in coal measures shale
Coal rock layer face cleat, hold hugger natural structure, thus fracture simulation test in can accurately recognize pressure break
Extension mechanism of the crack in the hugger of coal rock layer.
Preferably, the object mould body includes being stacked on the thickness direction along the object mould body and fixing each other
Multiple coal rock layers and multiple rammells.
Preferably, multiple coal rock layers include spaced first coal rock layer and the second coal rock layer, multiple pages
Rock stratum is stacked along the thickness direction of the object mould body and is arranged between first coal rock layer and second coal rock layer.
Preferably, each coal rock layer includes multiple coal petrography thin layers, and multiple coal petrography thin layers are along the object
It is stacked on the thickness direction of mould body and fixes each other, third infiltration is provided between the adjacent coal petrography thin layer
Piece, the third osmotic tablets are configured to coal petrography stratification；And/or
The 4th osmotic tablets are provided between the adjacent rammell, the 4th osmotic tablets are configured to shale stratification.
Preferably, first osmotic tablets include cardboard；Second osmotic tablets include cardboard；The third osmotic tablets packet
Include the scraps of paper；4th osmotic tablets include the scraps of paper.
Preferably, the object mould body includes bond the coal rock layer and the rammell adjacent with the coal rock layer viscous
Tie layer.
Second aspect of the present invention provides a kind of preparation method of coal measures shale object mould test specimen, the coal measures shale object mould test specimen
Preparation method be used to prepare coal measures shale object mould test specimen provided by the present invention；The preparation method includes:
Step S10, the coal petrography thin layer is prepared to obtain the coal rock layer, during preparing the coal petrography thin layer,
Multiple first osmotic tablets and multiple second osmotic tablets are inserted into the coal petrography thin layer；
Step S20, the rammell is prepared；
Step S30, the coal rock layer completed preparation and the rammell stack and by the coal rock layer and the page
Rock stratum is fastened to each other；
Step S40, wellbore is opened up on the object mould body, and the simulation wellbore hole is inserted in the wellbore.
Preferably, the step S10 includes: S11, cement, quartz sand, coal dust, clay and water is mixed to form coal rock layer
Base-material pours the coal rock layer base-material and obtains preforming coal petrography thin layer；S12, the dry preforming coal petrography thin layer, dry
In the process, multiple first osmotic tablets and multiple second osmotic tablets are inserted into the preforming coal petrography thin layer；And/or
Include: S21, cement, quartz sand, clay and water is mixed to form rammell base-material in the step S20, pours institute
It states rammell base-material and obtains preforming rammell；S22, the dry preforming rammell.
Preferably, pre- in the layer during dry one layer of preforming coal petrography thin layer in the step S10
The third osmotic tablets for being configured to coal petrography stratification are placed on molding coal petrography thin layer, pour coal petrography in the third osmotic tablets again later
Layer base-material is to prepare another layer coal petrography thin layer.
Preferably, in the step S20, during dry one layer of preforming rammell, the layer in advance at
The 4th osmotic tablets are placed on type rammell, pour rammell base-material in the 4th osmotic tablets to prepare another layer of institute again later
State rammell.
Preferably, the step S30 includes: S31, cement and quartz sand is mixed to get adhesive layer base-material, will be adjacent
The coal rock layer and the rammell be opposite and interval setting；S32, it is infused between the adjacent coal rock layer and the rammell
Enter the adhesive layer base-material.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the coal measures shale object mould test specimen of the preferred embodiment for the present invention；
Fig. 2 is the schematic perspective view of the coal measures shale object mould test specimen of another preferred embodiment of the present invention；
Fig. 3 is the schematic perspective view of the coal rock layer of the coal measures shale object mould test specimen of the preferred embodiment for the present invention；
Fig. 4 is the schematic perspective view of the rammell of the coal measures shale object mould test specimen of the preferred embodiment for the present invention；
Fig. 5 is the pressure break state after pressure break is tested of coal measures shale object mould test specimen 1 obtained in the embodiment of the present invention 1
Schematic diagram；
Fig. 6 is the pressure break state after pressure break is tested of coal measures shale object mould test specimen 2 obtained in the embodiment of the present invention 2
Schematic diagram.
Description of symbols
1- coal measures shale object mould test specimen；10- coal rock layer；The first coal rock layer of 10a-；The second coal rock layer of 10b-；100- coal petrography is thin
Layer；102- third osmotic tablets；11- simulation wellbore hole；The rammell 12-；The 4th osmotic tablets of 122-；14- hugger component；140- first seeps
Saturating piece；The second osmotic tablets of 142-；16- adhesive layer.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " typically refers to
Understand that " inside and outside " is the inside and outside of the profile of finger in conjunction with the orientation in attached drawing and practical application.
The present invention provides a kind of coal measures shale object mould test specimen, coal measures shale object mould test specimen 1 includes object mould body, simulation well
Cylinder 11 and hugger component 14.Wherein, the object mould body include along the object mould body thickness direction arrangement and each other
Fixed coal rock layer 10 and rammell 12, coal rock layer 10 include coal petrography thin layer 100, can be in the thickness direction along the object mould body
On be stacked multiple coal rock layers 10 and multiple rammells 12, multiple coal rock layers 10 and multiple rammells 12 are fixed each other, are needed
Illustrate, on the thickness direction along the object mould body, can according to coal measures shale to be simulated actual conditions and reality
The arrangement mode between coal rock layer 10 and the respective number in rammell 12 and the two is arranged in border demand；For example, settable
Two coal rock layers 10 and multiple rammells 12, in which: each coal rock layer 10 may include multiple coal petrography thin layers 100, and multiple coal petrographys are thin
Layer 100 can be arranged along the thickness direction of the object mould body and be fixed each other, and multiple rammells 12 are one group, this group of shale
Layer 12 may be provided between two coal rock layers 10 or one of coal rock layer 10 may be provided at another coal rock layer 10 and the group
Between rammell 12；In addition, can also arrange in the following manner: one coal rock layer 10 of setting and multiple rammells 12, in which: more
A rammell 12, which can be divided into two groups, every group, can multiple rammells 12, and coal rock layer 10 may be provided between two groups of rammells 12,
Or wherein one group of rammell 12 may be provided between another group of rammell 12 and coal rock layer 10.It is offered on the object mould body
Wellbore, wherein as shown in fig. 1, the wellbore may be disposed at rammell 12 and extend in rammell 12；As shown in Figure 2,
The wellbore may be provided at coal rock layer 10 and extend along the thickness of the object mould body；It should be noted settable level
Well or vertical well, the also settable inclined shaft with certain angle.Simulation wellbore hole 11 is inserted in the wellbore, simulation wellbore hole 11
It can be bonded at the well head of the wellbore.Hugger component 14 is set in coal rock layer 10, and hugger component 14 includes being inserted in coal petrography
It is multiple as 3-5 the first osmotic tablets 140 and multiple second osmotic tablets 142, the first osmotic tablets 140 are configured to face in thin layer 100
Hugger, the second osmotic tablets 142 be configured to end hugger, it can be appreciated that, the first osmotic tablets 140 it is vertical with coal petrography thin layer 100 or
Steep angle intersection, the object mould body is substantially in bulk, and the first osmotic tablets 140 can be along the length or width of the object mould body
Direction extends, and multiple first osmotic tablets 140 are intervally arranged；Second osmotic tablets 142 and coal petrography thin layer 100 are vertical or steep angle is intersected,
Second osmotic tablets 142 be limited between two adjacent the first osmotic tablets 140 or be limited in the first osmotic tablets 140 and with this
Between the edge of the adjacent object mould body of one osmotic tablets 140, between two adjacent the first osmotic tablets 140 or first seeps
It may be provided between saturating piece 140 and the edge of the object mould body adjacent with first osmotic tablets 140 between multiple such as 5-10
Every the second osmotic tablets 142 of distribution, the second osmotic tablets 142 can be perpendicular with the first osmotic tablets 140.By in coal petrography thin layer 100
It is middle that multiple the first osmotic tablets 140 for being configured to face cleat for being inserted in coal petrography thin layer 100 are set and multiple are configured to end hugger
Second osmotic tablets 142, so as to effectively simulate the face cleat of the coal rock layer in coal measures shale, hold the natural structure of hugger, by
This can accurately recognize extension mechanism of the fracturing fracture in the hugger of coal rock layer in fracture simulation test.Wherein,
Permeable material can be selected and prepare the first osmotic tablets 140 and the second osmotic tablets 142, such as cardboard or osmotic membranes can be used as
Osmotic tablets.
In conjunction with shown in Fig. 1 and Fig. 2, multiple coal rock layers 10 may include spaced first coal rock layer 10a and the second coal
Rock stratum 10b, it is multiple as three rammells 12 can be stacked along the thickness direction of the object mould body and is arranged in the first coal rock layer 10a
And second between coal rock layer 10b, multiple rammells 12 can be fixed each other.In addition, each coal rock layer 10 may include it is multiple such as
Two coal petrography thin layers 100 are that the first coal rock layer 10a may include that multiple such as two coal petrography thin layers 100, the second coal rock layer 10b may include
Multiple such as two coal petrography thin layers 100, wherein multiple coal petrography thin layers 100 are stacked simultaneously on the thickness direction along the object mould body
And it fixes each other.
It, as shown in Figure 3 can be in adjacent coal petrography thin layer in order to simulate the natural structure of the stratification in coal rock layer 10
Third osmotic tablets 102 are set between 100, and third osmotic tablets 102 are configured to coal petrography stratification, in this way, the energy when carrying out crushing test
Extension mechanism of enough accurately understanding fracturing fractures in coal petrography stratification；In addition, as shown in Figure 4, it can be in adjacent rammell
4th osmotic tablets 122 are set between 12, and the 4th osmotic tablets 122 are configured to shale stratification, and thus, it is possible to simulate in rammell 12
The natural structure of stratification, to can accurately recognize expansion of the fracturing fracture in shale stratification when carrying out fracture simulation test
Exhibition mechanism.Wherein, permeable material preparation third osmotic tablets 102 and the 4th osmotic tablets 122, such as paper or infiltration can be selected
Property film can be used as osmotic tablets.
In conjunction with shown in Fig. 1 and Fig. 2, it can be arranged between coal rock layer 10 and the rammell 12 adjacent with the coal rock layer 10 viscous
Mutual adhesive layer 16 is tied, it specifically, can be between coal petrography thin layer 100 and the rammell 12 adjacent with the coal petrography thin layer 100
Adhesive layer 16 is set, and the boundary plane of weakness between such analog different rock-layers thus can be quasi- when carrying out fracture simulation test
True understanding fracturing fracture wears layer rule at the plane of weakness of boundary.Wherein, the thickness of adhesive layer 16 can be 10mm.
The present invention also provides a kind of preparation method of coal measures shale object mould test specimen, the system of the coal measures shale object mould test specimen
Preparation Method is used to prepare coal measures shale object mould test specimen 1 provided by the present invention；The preparation method includes:
Step S10, coal petrography thin layer 100 is prepared to obtain coal rock layer 10, during preparing coal petrography thin layer 100, in coal
Multiple first osmotic tablets 140 and multiple second osmotic tablets 142 are inserted into rock thin layer 100, in which: the first osmotic tablets 140 are configured to
Face cleat, the second osmotic tablets 142 are configured to end hugger；
Step S20, rammell 12 is prepared；
Step S30, will preparation complete coal rock layer 10 and rammell 12 stack and by coal rock layer 10 and rammell 12 each other
It is fixed together；
Step S40, wellbore is opened up on the object mould body, and simulation wellbore hole 11 is inserted in wellbore.
Further, the step S10 includes: S11, cement, quartz sand, coal dust, clay and water is mixed to form coal petrography
Layer base-material, pours the coal rock layer base-material and obtains preforming coal petrography thin layer, wherein the weight of cement, quartz sand, coal dust, clay
Than that can be cement: quartz sand: coal dust: clay=2:1:1:1, water can be added according to actual needs, if convenient in advance at
The molding of moulded coal rock thin layer pours into deployed coal rock layer base-material in corresponding mold so that coal rock layer base-material forms；
In addition, during allotment coal rock layer base-material, produced by defrother being added into coal rock layer base-material to remove in whipping process
Gas；S12, the dry preforming coal petrography thin layer, the dry time is 20-40 minutes, during drying, be can be used
The moisture on the surface of the preforming coal petrography thin layer is sucked out in order to solidify drying in blotting paper, in addition, during drying, it can
Multiple first osmotic tablets 140 and multiple second osmotic tablets 142 are inserted into the preforming coal petrography thin layer, wherein the first infiltration
Piece 140 and the arrangement mode of the second osmotic tablets 142 are described in foregoing teachings, carry out plugging i.e. accordingly in this step
It can；, can be using red art paper as the first osmotic tablets 140 for the ease of observation, and can be permeated yellow art paper as second
Piece 142.
In the step S10, during dry one layer of preforming coal petrography thin layer, such as wait constitute this layer
After the coal rock layer base-material coagulation forming slightly of coal petrography thin layer 100, it can be placed on this layer of preforming coal petrography thin layer and be configured to coal petrography
The third osmotic tablets 102 of stratification, such as the paper that corresponding size can be selected are seeped in third again later as third osmotic tablets 102
Coal rock layer base-material is poured to prepare another layer of coal petrography thin layer 100 on saturating piece 102, that is, continues to pour coal rock layer base-material into grinding tool simultaneously
It is dried, during drying, plugs the first osmotic tablets 140 for being configured to face cleat accordingly and be configured to end hugger
Second osmotic tablets 142.After coal rock layer 10 to be obtained, it may make that coal rock layer 10 is 36-48 hours dry.
In addition, the step S20 includes: S21, cement, quartz sand, clay and water is mixed to form rammell base-material, pour
Build the rammell base-material and obtain preforming rammell, wherein cement, quartz sand, clay weight ratio can be cement: quartz
Sand: clay=1:1:1, water can be added according to actual needs, as long as being convenient for preforming shale formable layer, will be deployed
Good rammell base-material pours into corresponding mold so that rammell base-material forms；In addition, the process of allotment rammell base-material
In, defrother can be added into rammell base-material to remove generated gas in whipping process；S22, drying are described preforming
Rammell, the dry time is 20-40 minutes, during drying, can be used blotting paper that the preforming rammell is sucked out
Surface moisture in order to solidifying drying.
In the step S20, during dry one layer of preforming rammell, such as the page wait constitute this layer
After the rammell base-material coagulation forming slightly of rock stratum 12, the 4th osmotic tablets 122 are placed on this layer of preforming rammell, such as can
It selects the paper of corresponding size as the 4th osmotic tablets 122, pours rammell base-material in the 4th osmotic tablets 122 again later to make
Standby another layer of rammell 12, that is, continue to pour rammell base-material into grinding tool and be dried.Behind rammell 12 to be obtained, it can make
It is 36-48 hours dry to obtain rammell 12.
In addition, the step S30 includes: S31, cement and quartz sand is mixed to get adhesive layer base-material, wherein cement and
The weight ratio of quartz sand is cement: quartz sand=1:1, and adjacent coal rock layer 10 and rammell 12 is opposite and interval is arranged,
Such as the first coal rock layer 10a and the second coal rock layer 10b can be placed in the both ends of corresponding mould, and multiple rammells 12 are placed in two
The centre of a coal rock layer 10；S32, the adhesive layer base-material is injected between adjacent coal rock layer 10 and rammell 12, later, into
Row drying, it is preferable that the coal measures shale object mould test specimen being prepared can be dried at 15-18 DEG C.
In addition, in step s 40, AB silica gel can be selected by simulation wellbore hole 11 and be bonded in the wellbore, wherein cementation when
Between be 12-16 hours.
Effect of the invention is further detailed below in conjunction with embodiment.
Embodiment
Embodiment 1 prepares coal measures shale object mould test specimen 1
Coal measures shale object mould shown in FIG. 1 is prepared according to the preparation method of coal measures shale object mould test specimen provided by the present invention
Test specimen.
Step S00, the feature of the coal measures of being simulated shale reservoir is analyzed, setting coal measures shale object mould test specimen has the first coal
Rock stratum 10a and the second coal rock layer 10b and three rammells being arranged between the first coal rock layer 10a and the second coal rock layer 10b
12, wherein each coal rock layer includes two coal petrography thin layers 100；
Step S10, cement, quartz sand, clay, coal dust and water are mixed to form coal rock layer base-material, wherein the weight of each material
Amount is than being cement: quartz sand: clay: coal dust=2:1:1:1；Coal rock layer base-material is injected into corresponding mold and obtains preforming coal petrography
Thin layer；The size of coal petrography thin layer is thickness 90mm, length 300mm and width 300mm；The dry preforming coal petrography thin layer 30
Minute, during drying, insertion is configured to the red art paper of face cleat and is configured to end hugger in coal petrography thin layer 100
Yellow art paper, the size of red art paper is 50mm × 300mm, yellow art paper having a size of 50mm × (40-50) mm；To
After the coal rock layer base-material coagulation forming slightly for constituting the coal petrography thin layer 100 of this layer, tile size is the A4 paper of 290mm × 290mm
As coal petrography stratification；Later, continue to pour coal rock layer base-material on A4 paper to prepare another layer of coal petrography thin layer 100；
Step S20, cement, quartz sand, clay and water are mixed to form rammell base-material, wherein the weight ratio of each material is
Cement: quartz sand: rammell base-material is injected corresponding mold and obtains preforming rammell by clay=1:1:1；The ruler of rammell
Very little is thickness 90mm, length 300mm and width 300mm；The dry preforming rammell 30 minutes；Wait constitute the page of this layer
After the rammell base-material coagulation forming slightly of rock stratum 12, tile size is the A4 paper of 290mm × 290mm as shale stratification；It
Afterwards, continue to pour coal rock layer base-material on A4 paper to prepare another layer of rammell 12, similarly prepare the second layer and third layer shale
Layer 12；The whole rammell consolidation molding time is finally set as 36-48 hours；
Step S30, cement and quartz sand are mixed to get adhesive layer base-material, wherein the weight ratio of each material is cement: stone
Sand=1:1, by the first coal rock layer 10a made, the second coal rock layer 10b and three rammells 12 according to coal petrography-shale-
The combining form of coal petrography is placed in mold, adhesive layer base-material is injected between adjacent coal rock layer 10 and rammell 12, when solidification
Between be set as 36h；
Step S40: drilling through wellbore in rammell 12, which is that horizontal well plugs simulation wellbore hole 11 into wellbore later
And select AB silica gel that simulation wellbore hole 11 is adhered to wellbore, the cementation time is 12h, and wherein the diameter of wellbore is 20mm, length is
180mm；The length of simulation wellbore hole 11 is 130mm, internal diameter 6mm, outer diameter 12mm.
Embodiment 2 prepares coal measures shale object mould test specimen 2
Coal measures shale object mould test specimen shown in Fig. 2 is prepared according to the method in embodiment 1, wherein the difference is that,
In step S40, wellbore is drilled through in coal rock layer 10, which is vertical well；The diameter of wellbore is 20mm, length 170mm；Simulation
The length of pit shaft 11 is 150mm, internal diameter 6mm, outer diameter 12mm, remaining is all the same with embodiment 1.
Test example
True triaxial hydraulic fracturing physics is carried out respectively to coal measures shale object mould sample obtained in embodiment 1 and embodiment 2
Simulated experiment, in which: the form of the fracturing fracture of coal measures shale object mould test specimen 1 is as shown in Figure 5, in the figure can be clear
See that fracturing fracture from the bottom crack initiation of pit shaft naked eye, forms the raphe transection for being parallel to maximum horizontal principal stress, crack is linked up
Two stratifications of shale, but do not penetrate coal page interface；In the form such as Fig. 6 of the fracturing fracture of coal measures shale object mould test specimen 2
It is shown, it can be clearly seen that fracturing fracture in the nearly pit shaft crack initiation of shale, and is extended up along pit shaft in the figure, penetrate shale
Stratification and coal page interface extend in coal petrography along hugger face, activating part coal petrography bed plane and hugger face.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited thereto.At this
It, can be with various simple variants of the technical solution of the present invention are made in the range of the technology design of invention.Including each particular technique
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No further explanation will be given.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection scope.
Claims (11)
1. a kind of coal measures shale object mould test specimen, which is characterized in that the coal measures shale object mould test specimen (1) includes:
Object mould body, the object mould body include the thickness direction arrangement along the object mould body and coal petrography fixed each other
Layer (10) and rammell (12), the coal rock layer (10) includes coal petrography thin layer (100), offers wellbore on the object mould body；
Simulation wellbore hole (11), the simulation wellbore hole (11) are inserted in the wellbore；
Hugger component (14), the hugger component (14) are set in the coal rock layer (10), and the hugger component (14) includes
Multiple first osmotic tablets (140) and multiple second osmotic tablets (142) being inserted in the coal petrography thin layer (100), described first
Osmotic tablets (140) are configured to face cleat, and second osmotic tablets (142) are configured to end hugger.
2. coal measures shale object mould test specimen according to claim 1, which is characterized in that the object mould body is included in along described
Multiple coal rock layers (10) that are stacked and fixing each other and multiple rammells on the thickness direction of object mould body
(12)。
3. coal measures shale object mould test specimen according to claim 2, which is characterized in that between multiple coal rock layers (10) include
Every the first coal rock layer (10a) and the second coal rock layer (10b) of setting, thickness of multiple rammells (12) along the object mould body
Direction is spent to be stacked and be arranged between first coal rock layer (10a) and second coal rock layer (10b).
4. coal measures shale object mould test specimen according to claim 3, which is characterized in that each coal rock layer (10) includes more
A coal petrography thin layer (100), multiple coal petrography thin layers (100) on the thickness direction along the object mould body be stacked and
It fixes, is provided with third osmotic tablets (102) between the adjacent coal petrography thin layer (100), the third osmotic tablets each other
(102) it is configured to coal petrography stratification；And/or
The 4th osmotic tablets (122) are provided between the adjacent rammell (12), the 4th osmotic tablets (122) are configured to page
Rock stratum reason.
5. coal measures shale object mould test specimen according to claim 4, which is characterized in that first osmotic tablets (140) include
Cardboard；Second osmotic tablets (142) include cardboard；The third osmotic tablets (102) include the scraps of paper；4th osmotic tablets
It (122) include the scraps of paper.
6. coal measures shale object mould test specimen described in any one of -5 according to claim 1, which is characterized in that the object mould body
Adhesive layer (16) including bonding the coal rock layer (10) and the rammell (12) adjacent with the coal rock layer (10).
7. a kind of preparation method of coal measures shale object mould test specimen, which is characterized in that the preparation side of the coal measures shale object mould test specimen
Method is used to prepare coal measures shale object mould test specimen (1) described in claim 1；The preparation method includes:
Step S10, the coal petrography thin layer (100) is prepared to obtain the coal rock layer (10), is preparing the coal petrography thin layer (100)
During, multiple first osmotic tablets (140) and multiple second osmotic tablets are inserted into the coal petrography thin layer (100)
(142)；
Step S20, the rammell (12) are prepared；
Step S30, the coal rock layer (10) completed preparation and the rammell (12) stacking and by the coal rock layer (10)
It is fastened to each other with the rammell (12)；
Step S40, wellbore is opened up on the object mould body, and the simulation wellbore hole (11) is inserted in the wellbore.
8. the preparation method of coal measures shale object mould test specimen according to claim 7, which is characterized in that the step S10 packet
Include: cement, quartz sand, coal dust, clay and water S11, being mixed to form coal rock layer base-material, pour the coal rock layer base-material obtain it is pre-
Form coal petrography thin layer；S12, the dry preforming coal petrography thin layer, during drying, in the preforming coal petrography thin layer
It is inserted into multiple first osmotic tablets (140) and multiple second osmotic tablets (142)；And/or
Include: S21, cement, quartz sand, clay and water is mixed to form rammell base-material in the step S20, pours the page
Rock stratum base-material obtains preforming rammell；S22, the dry preforming rammell.
9. the preparation method of coal measures shale object mould test specimen according to claim 8, which is characterized in that
In the step S10, during dry one layer of preforming coal petrography thin layer, in this layer of preforming coal petrography thin layer
It is upper to place the third osmotic tablets (102) for being configured to coal petrography stratification, coal rock layer is poured on the third osmotic tablets (102) again later
Base-material is to prepare another layer coal petrography thin layer (100).
10. the preparation method of coal measures shale object mould test specimen according to claim 9, which is characterized in that in the step S20
In, during dry one layer of preforming rammell, the 4th osmotic tablets are placed on this layer of preforming rammell
(122), rammell base-material is poured on the 4th osmotic tablets (122) to prepare another layer rammell (12) again later.
11. the preparation method of coal measures shale object mould test specimen according to claim 7, which is characterized in that the step S30 packet
It includes: cement and quartz sand S31, being mixed to get adhesive layer base-material, by the adjacent coal rock layer (10) and the rammell
(12) opposite and interval setting；S32, the bonding is injected between the adjacent coal rock layer (10) and the rammell (12)
Layer base-material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051389A (en) * | 2020-07-21 | 2020-12-08 | 中煤科工集团重庆研究院有限公司 | Preparation material for remolding coal series mud rock sample and batch preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279131A (en) * | 2011-07-18 | 2011-12-14 | 中国石油大学(北京) | Simulation experiment method of coal seam hydraulic fracture |
| CN104034563A (en) * | 2014-06-12 | 2014-09-10 | 中国石油大学(北京) | Preparation method of artificial rock core of jointing shale |
| CN105334090A (en) * | 2015-11-02 | 2016-02-17 | 中国石油大学(北京) | Manufacturing method of coal-bearing production layer set fracturing physical modeling samples |
| CN106593383A (en) * | 2016-11-29 | 2017-04-26 | 中国石油大学(北京) | Hydraulic-fracturing physical simulation method for downhole rock core |
| CN108414311A (en) * | 2018-02-14 | 2018-08-17 | 中联煤层气有限责任公司 | Consider the preparation method of the coal measures payzone group pressure break object mould sample of intermediate zone |
| CN108426753A (en) * | 2018-01-17 | 2018-08-21 | 中国地质大学（武汉） | A kind of artificial shale core preparation method based on inorganic glue proportioning |
| CN108518209A (en) * | 2018-02-14 | 2018-09-11 | 中联煤层气有限责任公司 | Consider that the azimuthal design method of well track is adopted in the coal measures payzone combination of intermediate zone |
| US20180348093A1 (en) * | 2017-06-06 | 2018-12-06 | United States Department of the Interiori | Subsurface Environment Sampler |
-
2019
- 2019-05-20 CN CN201910420055.0A patent/CN110220756B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279131A (en) * | 2011-07-18 | 2011-12-14 | 中国石油大学(北京) | Simulation experiment method of coal seam hydraulic fracture |
| CN104034563A (en) * | 2014-06-12 | 2014-09-10 | 中国石油大学(北京) | Preparation method of artificial rock core of jointing shale |
| CN105334090A (en) * | 2015-11-02 | 2016-02-17 | 中国石油大学(北京) | Manufacturing method of coal-bearing production layer set fracturing physical modeling samples |
| CN106593383A (en) * | 2016-11-29 | 2017-04-26 | 中国石油大学(北京) | Hydraulic-fracturing physical simulation method for downhole rock core |
| US20180348093A1 (en) * | 2017-06-06 | 2018-12-06 | United States Department of the Interiori | Subsurface Environment Sampler |
| CN108426753A (en) * | 2018-01-17 | 2018-08-21 | 中国地质大学（武汉） | A kind of artificial shale core preparation method based on inorganic glue proportioning |
| CN108414311A (en) * | 2018-02-14 | 2018-08-17 | 中联煤层气有限责任公司 | Consider the preparation method of the coal measures payzone group pressure break object mould sample of intermediate zone |
| CN108518209A (en) * | 2018-02-14 | 2018-09-11 | 中联煤层气有限责任公司 | Consider that the azimuthal design method of well track is adopted in the coal measures payzone combination of intermediate zone |
Non-Patent Citations (2)
| Title |
|---|
| CHI AI ET AL: ""Experimental investigation of propagation mechanisms and fracture morphology for coalbed methane reservoirs"", 《PETROLEUM SCIENCE》 * |
| 孟尚志 等: ""煤系"三气"共采产层组压裂裂缝扩展物模试验研究"", 《煤炭学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051389A (en) * | 2020-07-21 | 2020-12-08 | 中煤科工集团重庆研究院有限公司 | Preparation material for remolding coal series mud rock sample and batch preparation method thereof |
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