CN108414335A - A kind of packaging type difference stratification angle artificial core and preparation method thereof - Google Patents
A kind of packaging type difference stratification angle artificial core and preparation method thereof Download PDFInfo
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- CN108414335A CN108414335A CN201810191697.3A CN201810191697A CN108414335A CN 108414335 A CN108414335 A CN 108414335A CN 201810191697 A CN201810191697 A CN 201810191697A CN 108414335 A CN108414335 A CN 108414335A
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- 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
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Abstract
The present invention relates to a kind of packaging type difference stratification angle artificial cores and preparation method thereof, this packaging type difference stratification angle artificial core is the true triaxial hydraulic fracturing experiments test specimen formed by wrapping up small rock core in big rock core, small rock core is the rock core with multilayer bed plane, two root long cylinders and two short cylindricals constitute holder, holder is also wrapped in big rock core, two root long cylinders are located on the left of two short cylindricals in holder, the capital line of two root long cylinders and two short cylindricals constitutes inclined surface, small rock core is obliquely installed on holder, the bottom surface of small rock core is overlapped with the inclined surface；Pressure break Guan Cong great rock cores upper surface is inserted into small rock core.There are deviations when the present invention solves the problems, such as to carry structure plane of weakness artificial core at present for simulated experiment.
Description
Technical field
The present invention relates to artificial core technical fields, and in particular to a kind of packaging type difference stratification angle artificial core and its
Production method.
Background technology
Compact reservoir permeability is very poor, it is necessary to which Efficient Development could be formed by forming fracture network by volume fracturing, fine and close
Reservoir in deposition process the structures plane of weakness such as stratification, microcrack develop, live pressure break practice have shown that, structure plane of weakness development reservoir
Chicken-wire cracking is more readily formed, fracturing effect is more preferable.Therefore the influencing mechanism that analysis structure plane of weakness fracture network is formed has
Significance.It is at present true triaxial hydraulic fracturing experiments about an important means of this aspect research, due to compact reservoir rock
The heart cannot be obtained largely and cannot carry out repeating experiment, therefore need to make a large amount of different angle, different mechanical property in testing
The artificial core of energy stratification.
There are mainly two types of mode, one kind is to be placed not in homogeneous material for making with structure plane of weakness artificial core at present
With the angle scraps of paper, for simulating intrinsic fracture, this mode cannot be used for simulating the plane of weakness of different cementing intensity；Another kind is point
The method that layer pours, the structure plane of weakness of this method is, through interface, cannot simulate the interface of different length, once and crack edge
After interface turns to, it is difficult to re-form new crack, the certain deviation of this and pressure break physical presence.
Invention content
The object of the present invention is to provide a kind of packaging type difference stratification angle artificial core, this packaging type difference stratification angle
There are deviations when degree artificial core is for solving the problems, such as to carry structure plane of weakness artificial core at present for simulated experiment.
The technical solution adopted by the present invention to solve the technical problems is：This packaging type difference stratification angle artificial core
It is the true triaxial hydraulic fracturing experiments test specimen formed by wrapping up small rock core in big rock core, small rock core is the rock with multilayer bed plane
The heart, two root long cylinders and two short cylindricals constitute holder, and holder is wrapped in big rock core, and two root long cylinders are located at two in holder
On the left of root short cylindrical, the capital line of two root long cylinders and two short cylindricals constitutes inclined surface, and small rock core is obliquely installed in holder
On, the bottom surface of small rock core is overlapped with the inclined surface；Pressure break Guan Cong great rock cores upper surface is inserted into small rock core.
The line of two root long cylinders and four points where two short cylindricals constitutes rectangle in said program, and the two of the rectangle
A side is equal at a distance from corresponding big rock core side, the distance in the front of the rectangle to big rock core front surface and the rectangle
The distance of back to big rock core rear surface is equal.
The production method of packaging type difference stratification angle artificial core in said program：
The small rock core with different level stratification is made first, and the mechanical property of time change bed plane is poured by control hierarchy
Can, then small rock core is put into according to certain angle in big rock core mold, is poured with the gap of big rock core mold in small rock core
It builds concrete and forms big rock core, after big rock core drying, drill straight reaches the hole of small rock core on big rock core, and is implanted into pressure break pipe, is formed
True triaxial hydraulic fracturing experiments test specimen.
The production method of packaging type difference stratification angle artificial core in said program, specially：
Step 1: prepared by small rock core：
A set of side plate of small rock core mold is connected first, and is placed on small rock core die bottom plate, small rock core mould inner surface applies
Lubricating oil is smeared, to demould；It cement and quartz sand is mixed according to a certain percentage, is stirred evenly after adding water, poured into and connect
It in rock core mold, is smoothed out using spatula, forms the first layer of small rock core；The second layer of small rock core is made after separated in time,
Interval time is different, and obtained boundary layer mechanical property is different, when making the second layer of small rock core, connects second set of small rock core
Die side plate is placed on first layer side plate, and using first layer rock core as bottom plate, the of small rock core is poured in being formed by cavity
Two layers, it is iteratively repeated the manufacturing process of the second layer, pours the third layer of small rock core, until reaching the number of plies of design, at room temperature
Maintenance, and periodically spray water, it is dry and cracked to prevent surface, form the small rock core with multilayer bed plane；
Step 2: prepared by big rock core：
The side plate of big rock core mold is connected, and is placed on big rock core die bottom plate, after cement plus water is stirred evenly, is laid on
On big rock core die bottom plate, holder is placed on big rock core die bottom plate, then ready-made small rock core inclination is placed on holder,
The gap between small rock core and big rock core mold is filled up with cement mortar, is finally struck off upper surface with spatula；It conserves at room temperature,
And tarpaulin is covered, and periodically water, it is dry and cracked to prevent surface；
Step 3: merging analog casing forms pressure break pipe：
After the completion of waiting for big rock core maintenance, big rock core is placed on drilling machine platform, in big rock core upper surface center, drill straight reaches small
Stainless pipe outer surface is uniformly coated with after cloud stone glue and is inserted into formation pressure break pipe in bored circular hole, stands 5 points by the circular hole of rock core
Clock.
The invention has the advantages that：
The present invention can be used for simulating the plane of weakness of different cementing intensity, can simulate the interface of different length, meet pressure break reality.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the layout drawing of two root long cylinders and two short cylindricals in big rock core mold in the present invention；
Fig. 3 is the stereogram of the medium and small rock core of the present invention；
Fig. 4 is the schematic diagram of the medium and small rock core mold of the present invention；
Fig. 5 is the schematic diagram of medium and small one side plate of rock core mold of the present invention；
Fig. 6 is the schematic diagram of another side plate of medium and small rock core mold of the invention；
Fig. 7 is the schematic diagram of big rock core mold in the present invention；
Fig. 8 is the schematic diagram of big rock core one side plate of mold in the present invention；
Fig. 9 is the schematic diagram of another side plate of big rock core mold in the present invention.
In figure：The small rock core molds of the small rock core 3- long cylinders 4- short cylindricals 5- pressure breaks pipe 6- of the big rock core 2- of 1-
The big rock core molds of 7-.
Specific implementation mode
The present invention will be further described below with reference to the drawings：
As shown in Figure 1, this packaging type difference stratification angle artificial core be formed by the small rock core of packaging type in big rock core it is true
Three axis hydraulic fracturing experiments test specimens, small rock core 2 are the rock core with multilayer bed plane, two root long cylinders 3 and two 4 structures of short cylindrical
At holder, holder is wrapped in big rock core 1, and two root long cylinders 3 are located at two 4 left sides of short cylindrical, two root long cylinders 3 in holder
Inclined surface, the line of four points where two root long cylinders 3 and two short cylindricals 4 are constituted with the capital line of two short cylindricals 4
Rectangle, the distance of the left side of the rectangle to 1 left side of big rock core and the right edge of the rectangle are constituted to 1 right side of big rock core
Apart from equal, the distance in the front of the rectangle to 1 front surface of big rock core is at a distance from the back of the rectangle to 1 rear surface of big rock core
It is equal.Small rock core 2 is obliquely installed on holder, and the bottom surface of small rock core 2 is overlapped with the inclined surface；Pressure break pipe 5 is from big rock core 1
Surface is inserted into small rock core 2.
This packaging type difference stratification angle Artificial Core Making method：
One, prepare material：
The material of artificial core is made of cement and quartz sand, and quartz sand is the fine quartz sand of 200 mesh, and cement selects 425 cement.
Two, prepare mold：
This method needs two molds, that is, small rock core mold 6 and big rock core mold 7, and small rock core mold 6 is by a bottom plate and four sets
Side plate forms, and side plate is connected using screw rod；Big rock core mold 7 is made of a bottom plate and a set of side plate, and side plate is connected using screw rod
It connects, forms square intracoelomic cavity after connection.
Small 6 size of rock core mold be 40mm × 160mm × 160mm, big 7 size of rock core mold be 300mm × 300mm ×
300mm。
Three, packaging type difference stratification angle artificial core is made（The small rock core of present embodiment pours four layers）：
（1）Small rock core die side plate is connected, and is placed on bottom plate, small rock core mold 6 is internal after connecting 40mm × 160mm
The inner cavity of × 160mm, in 6 inner wall coating lubricating oil of small rock core mold；
（2）Cement, quartz sand, water are mixed evenly；Selected cement is 425 cement, and quartz sand size is 200 mesh, cement
It is 2 with quartz sand ratio:1.The mixture being stirred is poured into small rock core mold 6, small mold first layer is paved with, is used in combination and smears
Knife strikes off, and stands half an hour；
（3）Connect small 6 second layer of rock core mold（The second layer and with the small rock core mold 6 on upper layer do not have bottom plate）, alignment is placed on
On first layer, using first layer the bottom of as, according to（2）Middle method pours into second layer mold after stirring evenly cement, quartz sand and water
In, it is struck off with spatula, stands half an hour；
（4）According to above method, third layer and the 4th layer are poured；
（5）After 24 hours, the small rock core 2 poured is demoulded, conserves at room temperature 7 days, gives small rock core 2 to sprinkle water daily, to prevent
Surface is dry and cracked；
（6）The long cylinder 2 of diameter 20mm, long 52mm, the short circle of diameter 20mm, long 30mm are poured using pure 425 cement simultaneously
2, column, indoor maintenance 7 days；
（7）Connect big rock core mold 7, screw rod be used in combination to fix, after connection big 7 inner cavity of rock core mold formed 300mm × 300mm ×
The space of 300mm, in 7 inner wall coating lubricating oil of big rock core mold；
（8）By 2 root long cylinders 3（52mm）It is placed on the left of big 7 bottom end of rock core mold, away from left side 81mm, 2 short cylindricals 4
（30mm）It is placed on the right side of big 7 bottom end of rock core mold, away from the right 81mm, each cylinder is 70mm apart from rear and front end distance；
（9）Cement and water are mixed evenly, selected cement is 425 cement, and the cement mortar after stirring is poured into big rock core
In mold 7, and 4 upper surface of short cylindrical is reached, and the position of short cylindrical 4 is kept not change, the small rock core 2 conserved is put
It sets on four cylinders, each angle of 2 lower face of small rock core corresponds to a cylinder, and remaining cement mortar is continued to pour until water
Mud fills all gaps of entire big rock core mold 7, and spatula is used in combination to smooth out upper surface；
（10）It will be demoulded after the big rock core 1 poured at room temperature static 24 hours, continue to conserve at room temperature, and water daily
2 times, prevent surface dry and cracked；
（11）After big rock core 1 conserves 15 days, places it on drilling machine, on it centre of surface position, drill out diameter 10mm, it is long
The circular hole of 180mm, circular hole are deep into small rock core 2, are uniformly coated with cloud stone glue in the outer surface of analog casing, and be inserted into and bore circle
Kong Zhong, after ten minutes glue complete admittedly, form 300mm × 300mm × 300mm true triaxial hydraulic pressure experiment test specimen.
Claims (4)
1. a kind of packaging type difference stratification angle artificial core, it is characterised in that：The artificial rock of this packaging type difference stratification angle
The heart is the true triaxial hydraulic fracturing experiments test specimen formed by wrapping up small rock core in big rock core, small rock core（2）For with multilayer stratification
The rock core in face, two root long cylinders（3）With two short cylindricals（4）Holder is constituted, holder is wrapped in big rock core（1）It is interior, in holder
Two root long cylinders（3）Positioned at two short cylindricals（4）Left side, two root long cylinders（3）With two short cylindricals（4）Capital line constitute
Inclined surface, small rock core（2）It is obliquely installed on holder, small rock core（2）Bottom surface overlapped with the inclined surface；Pressure break pipe（5）From
Big rock core（1）Upper surface is inserted into small rock core（2）In.
2. packaging type difference stratification angle artificial core according to claim 1, it is characterised in that：The two root longs circle
Column（3）With two short cylindricals（4）The line of four points at place constitutes rectangle, two sides and the corresponding big rock core of the rectangle
（1）The distance of side is equal, the front of the rectangle to big rock core（1）The distance of front surface and the back of the rectangle to big rock core
（1）The distance of rear surface is equal.
3. a kind of production method of packaging type difference stratification angle artificial core as claimed in claim 1 or 2, it is characterised in that：
The small rock core with different level stratification is made first（2）, the mechanical property of time change bed plane is poured by control hierarchy,
Then by small rock core（2）It is put into big rock core mold according to certain angle（7）In, in small rock core（2）With big rock core mold（7）'s
Casting concrete forms big rock core in gap（1）, big rock core（1）After drying, in big rock core（1）Upper drill straight reaches small rock core（2）'s
Hole, and it is implanted into pressure break pipe（5）, form true triaxial hydraulic fracturing experiments test specimen.
4. the production method of packaging type difference stratification angle artificial core according to claim 3, it is characterised in that：
Step 1: prepared by small rock core：
First by small rock core mold（6）The connection of a set of side plate, and be placed on small rock core die bottom plate, small rock core mold（6）It is interior
Surface smear lubricating oil, to demould；Cement and quartz sand are mixed according to a certain percentage, stirred evenly after adding water, the company of pouring into
It in the rock core mold connected, is smoothed out using spatula, forms small rock core（2）First layer；Small rock core is made after separated in time
（2）The second layer, interval time is different, and obtained boundary layer mechanical property is different, makes small rock core（2）The second layer when,
The second set small rock core die side plate of connection, is placed on first layer side plate, using first layer rock core as bottom plate, is being formed by cavity
In pour small rock core（2）The second layer, be iteratively repeated the manufacturing process of the second layer, pour small rock core（2）Third layer, until reach
It to the number of plies of design, conserves, and periodically sprays water at room temperature, it is dry and cracked to prevent surface, form the small rock core with multilayer bed plane
（2）；
Step 2: prepared by big rock core：
By big rock core mold（7）Side plate connection, and be placed on big rock core die bottom plate, after cement plus water is stirred evenly, paving
It is located on big rock core die bottom plate, holder is placed on big rock core die bottom plate, then by ready-made small rock core（2）Inclination is placed on
On holder, small rock core is filled up with cement mortar（2）With big rock core mold（7）Between gap, finally upper surface is struck off with spatula；
It conserves at room temperature, and covers tarpaulin, periodically water, it is dry and cracked to prevent surface；
Step 3: merging analog casing forms pressure break pipe：
Wait for big rock core（1）After the completion of maintenance, by big rock core（1）It is placed on drilling machine platform, in big rock core（1）Upper surface center
Drill straight reaches small rock core（2）Circular hole, stainless pipe outer surface is uniformly coated with after cloud stone glue and is inserted into formation pressure in bored circular hole
Pipe is split, stands 5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810191697.3A CN108414335B (en) | 2018-03-08 | 2018-03-08 | Wrapped artificial rock core with different bedding angles and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810191697.3A CN108414335B (en) | 2018-03-08 | 2018-03-08 | Wrapped artificial rock core with different bedding angles and manufacturing method thereof |
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| CN108414335B CN108414335B (en) | 2021-06-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521187A (en) * | 2018-12-04 | 2019-03-26 | 中建西部建设湖南有限公司 | One kind is for detecting cement slurry self-constriction device and method |
| CN111283935A (en) * | 2020-03-09 | 2020-06-16 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
-
2018
- 2018-03-08 CN CN201810191697.3A patent/CN108414335B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521187A (en) * | 2018-12-04 | 2019-03-26 | 中建西部建设湖南有限公司 | One kind is for detecting cement slurry self-constriction device and method |
| CN109521187B (en) * | 2018-12-04 | 2024-04-02 | 中建西部建设湖南有限公司 | Device and method for detecting self-shrinkage of cement paste |
| CN111283935A (en) * | 2020-03-09 | 2020-06-16 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
| CN111283935B (en) * | 2020-03-09 | 2021-12-21 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
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| CN108414335B (en) | 2021-06-29 |
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