CN106501054A - A kind of mould for preparing artificial side's rock core and the preparation method of square rock core - Google Patents
A kind of mould for preparing artificial side's rock core and the preparation method of square rock core Download PDFInfo
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- CN106501054A CN106501054A CN201710010829.3A CN201710010829A CN106501054A CN 106501054 A CN106501054 A CN 106501054A CN 201710010829 A CN201710010829 A CN 201710010829A CN 106501054 A CN106501054 A CN 106501054A
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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
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Abstract
The invention discloses the preparation method of a kind of mould for preparing artificial side's rock core and square rock core, the mould includes：Base plate；Pad；Square ring flat-plate, empties into four rectangular through-holes arranged side by side in the middle of which；Briquetting group, it include four briquettings matched with rectangular through-hole, are provided with T fonts exhaust passage inside briquetting, and three ports of exhaust passage are located at pressed surface and the left and right side of briquetting respectively；Instrument is struck off, which includes scraper plate, crossbeam, elastic adjusting knob and size adjusting knob, the crossbeam includes two clamping plates, two clamping plate side edges have for accommodating the recess of the scraper plate, and the recess of two clamping plates is oppositely arranged and scraper plate is clamped between two clamping plates.The preparation method of Fang Yanxin includes：(1) assembly jig；(2) cementing agent is prepared；(3) dispensing is die-filling；(4) compressing；(5) it is heating and curing；(6) demoulding.Present invention optimizes the preparation method of artificial side's rock core, improves efficiency and the core quality of rock core making.
Description
Technical field
The invention belongs to oil reservoir development technical field, and in particular to a kind of mould for preparing artificial side's rock core and square rock core
Preparation method.
Background technology
In water controlled field development process, chemical oil displacement agent for improving ecology development effectiveness and improves oil recovery factor tool
There is highly important effect, the oil displacement agent product for possessing certain function often has many, and this is accomplished by preferred to product.Product is excellent
The foundation of choosing is its seepage characteristic in reservoir cores, that is, need to carry out rock core displacement test.At present, due to natural core valency
Lattice are high and limited by source and specification, and when studies in China mechanism carries out rock core displacement test, majority adopts artificial core.
At present, Artificial Core Making method has quartz sand epoxy resin cementitious, quartz sand or glass marble filling and quartz sand
Phosphoric acid aluminum sinter etc. is several, and wherein quartz sand aluminum phosphate sintering process makes the poor repeatability of rock core, quartz sand or glass marble filling
Model does not contain cement, and the aspect such as its pore-size and pore structure is larger with natural core difference, the application of both rock cores
It is restricted.Not only blowhole size and architectural feature are close with natural core for quartz sand epoxide-resin agglutinated, and
Manufacture craft is simple, rock core is repeated excellent, thus is widely used in naphthology research at home.
But conventional epoxy resin is with liquid presentation, including aluminum phosphate, silicates epoxy resin.Liquid with solid
The mixability of body is subject to the viscosity of liquid epoxy resin, during making rock core, as liquid-solid mixture is in mould
The middle profit reduction and reserving time is longer, if liquid viscosity is not enough, then the adhesive force for being attached to particle surface is not enough, and liquid will be made in gravity
Migrated to mold bottom with lower, the homogeneous rock core after shaping is heterogeneous to a certain extent, shows the cementing shape of hole formula
Formula.It is the generation of unavoidably this phenomenon using liquid cementing agent.Therefore, for a rock core system for contact cement mode
Make, the method is impracticable, need to open up new method.
Content of the invention
It is an object of the invention to solve at least the above and/or defect, and provide at least will be described later excellent
Point.
It is a still further object of the present invention to provide the preparation method of a kind of mould for preparing artificial side's rock core and square rock core, is
The cementing oil reservoir of experimental study point contact type and prepare the artificial side's rock core of contact, meet indoor with regard to a contact Oil Reservoir Types
Experimental study.
In order to realize according to object of the present invention and further advantage, there is provided a kind of mould for preparing artificial core,
Including：
Base plate；
Pad, its are laid on the substrate；
Square ring flat-plate, its are located above the pad, empty into four rectangular through-holes arranged side by side in the middle of the square ring flat-plate,
The clear size of opening：The size of length × width × height is 300mm × 45mm × 135mm；
Briquetting group, it include four briquettings matched with rectangular through-hole, are provided with the exhaust of T fonts logical inside the briquetting
Road, three ports of exhaust passage are located at pressed surface and the left and right side of briquetting respectively；
Instrument is struck off, which includes scraper plate, crossbeam, elastic adjusting knob and size adjusting knob, is provided with the scraper plate
Located at the side top of scraper plate, the crossbeam, size scale, size adjusting knob include that two clamping plates, clamping plate side marginal center are opened
Be provided with depressed part, the depressed part of two clamping plates is oppositely arranged, the scraper plate be arranged in the way of perpendicular to clamping plate two clamping plates it
Between depressed part in, fixed by elastic adjusting knob, and slided up and down relative to two clamping plates sized.
Preferably, the corner location of the square ring flat-plate is respectively equipped with suspension ring.
Preferably, mold interior wall surfaces roughness Ra≤0.025 μm.
A kind of preparation method of artificial side's rock core, comprises the steps：
(1) assembly jig；
(2) cementing agent is prepared：The cementing agent by polyester resin, curing agent, levelling agent and barium sulfate by mass percentage
Mix, wherein, polyester resin weight/mass percentage composition be 80%～94%, curing agent weight/mass percentage composition be 4.5%～
14%, levelling agent weight/mass percentage composition is 1%～5%, and barium sulfate weight/mass percentage composition is 0.5%～1.0%；
(3) dispensing is die-filling：Quartz sand, clay mineral and cementing agent are mixed in proportion, the rectangle for loading mould leads to
In hole；
(4) compressing：Briquetting and body die are fixed using bolt, the mould for having loaded are placed on a hydraulic press,
Precompressed 10min under the conditions of pressing pressure 50MPa～58MPa, then keeps constant pressure 50MPa voltage stabilizing 15min；
(5) it is heating and curing：Mould after by release is integrally put in high temperature oven, first toasts 240min at 98 DEG C, so
After be warming up to 120 DEG C baking 30min, be finally warming up to 210 DEG C baking 10min；
(6) demoulding：Rock core in the mould that process is heating and curing takes out, and dismantles base plate and briquetting bolt, and hydraulic press connects
Connect suspension ring and lift mould, then select iron block support mode bottom, rock core is ejected using briquetting, the artificial side of shaping is finally given
Rock core.
Preferably, the cementing agent is 1 with the mixing quality ratio of quartz sand:100～200.
Preferably, in the preparation method of artificial side's rock core in step (3), after feeding the mixture into mould, by mould
Tool is put on vibrating device and vibrates, and then strikes off mixture surface with the instrument that strikes off, briquetting is placed in mixture surface finally.
Preferably, the preparation method of artificial side's rock core also includes that step (7) is cut：In air, nitrogen or liquid nitrogen
Lower cutting rock core two ends of any one atmosphere protection in three, obtain length, width, height be respectively 300mm, 45mm,
Artificial side's rock core of 45mm.
The present invention includes following beneficial effect：
One, the present invention can disposably prepare most four according to actual needs using the mould of designed, designed assembling
Individual rock core, optimizes rock core briquetting internal structure, is provided with T fonts exhaust passage, three ports point of exhaust passage inside briquetting
Not Wei Yu briquetting pressed surface and left and right side, it is to avoid during tamping, because the gas impingement mix in rock core cavity
Composition granule, changes the particle contact relation after being well mixed, or even mixture is gone out from exhaust passage, base plate, square ring flat-plate
And the surface of briquetting is polished coarse, is conducive to quartz sand particle to agree with mould during tamping, and does not affect to take out
Damage during rock core to rock core wall；
The structure and size of strike off instrument two, are improved, and the instrument that strikes off of the size is matched with mould, and scrapes thickness of slab
Degree is moderate, and scraper plate is formed with mould and most preferably agreed with, and can adjust blade height, being capable of stability contorting strike-off stick, it is ensured that strike off
Plate is not inclined, it is ensured that strike off effect；
Three, cementing agent is optimized in the present invention, by polyester resin, curing agent, levelling agent and barium sulfate by most
Good mass percent is mixed to prepare cementing agent, which has more preferable cementation solidifying shaping effect to compound particles, it is to avoid because
Cementing agent content is excessive, is difficult to disperse, and is directly cemented to the phenomenon of dead hole gap structure, and then obtains the artificial core of high-quality；
Four, in compressing step, first precompressed 10min, then voltage stabilizing 15min, makes mixing by precompressed and voltage stabilizing
The composition granule way of contact is more stable under the pressure condition；
Finally, in heat-curing step：First at 98 DEG C, 240min is toasted, then heats to 120 DEG C of baking 30min,
210 DEG C baking 10mins are finally warming up to, and first passing around heat transfer makes even heat in insulating box be transferred to each position inside rock core
Put, be that place mat is made in next step heating, make the optimum temperature of polyester resin and melt under the time, it is to avoid pore structure changes, and then
The rock core of prepared function admirable.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
The mould structure schematic diagram of the artificial side's rock cores of Fig. 1；
Fig. 2 is briquette structure schematic diagram；
Fig. 3 is briquetting profile；
Fig. 4 is to strike off tool construction schematic diagram.
Label in figure：
Base plate 1, square ring flat-plate 2, pad 3, briquetting group 4, connector 5, rectangular through-hole 6, exhaust passage 7, port 8, suspension ring
9th, support 10, scraper plate 11, crossbeam 12, elastic adjusting knob 13, size scale 14, size adjusting knob 15.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that such as " with ", "comprising" and " including " term used herein are not precluded from one or many
Other elements individual or the presence or interpolation of its combination.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of mould for preparing artificial core, including：
Base plate 1；
Pad 3, its are laid on above the base plate 1, and base plate and square ring flat-plate are separated by the pad, it is to avoid rock core and bottom
The directly contact of plate, it is preferred that the film that the pad is made for plastics；
Square ring flat-plate 2, its are located above the pad 3, empty into four rectangles arranged side by side and lead in the middle of the square ring flat-plate
Hole 6, the clear size of opening：The size of length × width × height is 300mm × 45mm × 135mm, can according to actual needs can be with one
Secondary property prepares most four rock cores；
Briquetting group 4, it include four briquettings matched with rectangular through-hole, are provided with the exhaust of T fonts logical inside the briquetting
Road 7, three ports 8 of exhaust passage be located at pressed surface and the left and right side of briquetting respectively, it is to avoid during tamping, because
Gas impingement mix composition granule in rock core cavity, changes the particle contact relation after being well mixed, or even makes mixture from row
Gas passage is gone out；
Instrument is struck off, as shown in figure 4, which includes scraper plate 11, crossbeam 12, elastic adjusting knob 13 and size adjusting knob
15, size scale 14 is provided with the scraper plate, size adjusting knob includes two folders located at the side top of scraper plate, the crossbeam
Plate, two clamping plate side edges have for accommodating the recess of the scraper plate, and the recess of two clamping plates is oppositely arranged and clamps scraper plate
Between two clamping plates, fixed by elastic adjusting knob, the scraper plate is slided up and down perpendicular to two clamping plates and relative to two clamping plates
Sized, preferred size is：Scrape plate hight 220mm, width 299.5mm, thickness 20mm, the high 60mm of crossbeam, long 400mm, width
80mm, the instrument that strikes off of the size are matched with mould, and scraper thickness is moderate, and scraper plate is formed with mould and most preferably agreed with, and can
To adjust blade height, being capable of stability contorting strike-off stick, it is ensured that strike-off stick is not inclined, it is ensured that strike off effect.
Another be that the corner location of the square ring flat-plate 2 is respectively equipped with suspension ring 9, moves mould by suspension ring in example
Dynamic, convenient dismounting base plate, and then rock core is deviate from from mould.
In such scheme, the mould adopts steel material, and the surface of base plate, square ring flat-plate and briquetting is polished slightly
Rough, roughness Ra≤0.025 μm, the roughness of the degree can be conducive to contract of the quartz sand particle with mould during tamping
Damage when closing, and not affecting removal of core to rock core wall.
The preparation method of artificial side's rock core, comprises the steps：
First, reservoir condition is selected
According to Bohai Sea reservoir condition, its oil reservoir belongs to the lithology of loose sand contact cement, and permeability range exists
100mD-5000mD, porosity ranges are in 29%-35%.Have selected quartz sand particle size scope 100-120 mesh.
2nd, prepared by rock core
(1) assembly jig：First pad 3 is laid on above base plate 1, then square ring flat-plate 2 is placed in above pad 3,
Base plate, pad and square ring flat-plate three are fixed by connector 5；
(2) cementing agent is prepared：The cementing agent by polyester resin, curing agent, levelling agent and barium sulfate by mass percentage
Mix, wherein, polyester resin weight/mass percentage composition be 80%～94%, curing agent weight/mass percentage composition be 4.5%～
14%, levelling agent weight/mass percentage composition is 1%～5%, and barium sulfate weight/mass percentage composition is 0.5%～1.0%；
(3) dispensing is die-filling：Quartz sand, clay mineral and cementing agent are mixed in proportion, cementing agent and quartz sand
Mixing quality ratio is 1:100～200, the mixture for weighing four parts of identical weights is respectively charged in the rectangular through-hole of mould, by mould
Tool is put on vibrating device and vibrates, and forms it into closely point contact to eliminate the bridging plug of mixture, then will with the instrument that strikes off
Mixture surface strikes off, and briquetting is placed in mixture surface finally；
(4) compressing：Briquetting and body die are fixed using bolt, the mould for having loaded are placed on a hydraulic press,
Precompressed 10min under the conditions of pressing pressure 50MPa～58MPa, then keeps constant pressure 50MPa voltage stabilizing 15min, using the pressure
The reason for method processed is：First, the high 45mm of rock core, single rock core lifting surface area 45mm × 300mm, polylith rock core are suppressed together,
Lifting surface area is larger, and pressure applied is bigger；Secondly, the disposable compacting that rock core pressing process is adopted, from vibrations side
Formula eliminate crane span structure so that mixture lower half is tightr, but mixture lower half stress less (crushing presence), thus will be long when
Between voltage stabilizing, make its compound particles way of contact more stable under the pressure condition；In real process, according to rock core to be made
Determining size and the press time of pressure, core permeability is 2000mD or so to permeability herein, so adopting pressure above
And the press time；
(5) it is heating and curing：Mould after by release is integrally put in high temperature oven, first toasts 240min at 98 DEG C, so
After be warming up to 120 DEG C of baking 30min, be finally warming up to 210 DEG C of baking 10min, using the heating means be a little：First
Temperature conditionss are that insulating box internal heat uniformly transfers to rock core each position so as to reach target temperature in order to conduct heat,
Place mat is heated for next step；Polyester powder, under second temperature conditions starts to melt, but the time is difficult long, liquid meeting
Flowing, causes pore structure to change, and frequent test of many times and rock core crush analytic electron microscope scanning, finally determine this value；?
At three temperature, polyester powder curing molding；
(6) demoulding：Rock core in the mould that process is heating and curing takes out, and dismantles base plate and briquetting bolt, and hydraulic press connects
Connect suspension ring and lift mould, then select iron block support mode bottom, rock core is ejected using briquetting, the artificial side of shaping is finally given
Rock core.
In another kind of example, the preparation method of artificial side's rock core also includes that step (7) is cut：In air, nitrogen
Or lower cutting rock core two ends of any one atmosphere protection in liquid nitrogen three, obtain length, width, height be respectively 300mm,
Artificial side's rock core of 45mm, 45mm.
As described above, the invention has the advantages that：
First, the present invention can disposably prepare most four according to actual needs using the mould of designed, designed assembling
Individual rock core, optimizes rock core briquetting internal structure, it is to avoid during tamping, because the gas impingement mix thing in rock core cavity
Particle, changes the particle contact relation after being well mixed, or even mixture is gone out from exhaust passage, base plate, square ring flat-plate and
The surface of briquetting is polished coarse, is conducive to quartz sand particle to agree with mould during tamping, and does not affect to take out rock
The damage during heart to rock core wall；Secondly, the structure and size of the instrument of striking off improved, and the size strikes off instrument with mould phase
Coupling, and scraper thickness is moderate, and scraper plate is formed with mould and most preferably agreed with, and can adjust blade height, can stability contorting scrape
Flat board, it is ensured that strike-off stick is not inclined, it is ensured that strike off effect；Then, cementing agent is optimized in the present invention, by polyester tree
Fat, curing agent, levelling agent and barium sulfate are mixed to prepare cementing agent by best in quality percentage, and which has more preferably to compound particles
Cementation solidifying shaping effect, it is to avoid cementing agent content is excessive, is difficult to disperse, is directly cemented to the phenomenon of dead hole gap structure,
And then obtain the artificial core of high-quality；Furthermore, in compressing step, compound particles contact side is made by precompressed and voltage stabilizing
Formula is more stable under the pressure condition；Finally, toasted using gradient temperature, be transferred to even heat in insulating box through heat transfer
Each position inside rock core, is that place mat is made in next step heating, makes the optimum temperature of polyester resin and melts under the time, it is to avoid hole
Structure change, and then the rock core of function admirable is obtained.
Although embodiment of the present invention is disclosed as above, which is not restricted in specification and embodiment listed
With.It can be applied to various suitable the field of the invention completely.For those skilled in the art, can be easily
Realize other modification.Therefore, under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (7)
1. a kind of mould for preparing artificial side's rock core, it is characterised in that include：
Base plate；
Pad, its are laid on the substrate；
Square ring flat-plate, its are located above the pad, empty into four rectangular through-holes arranged side by side in the middle of the square ring flat-plate, described
Clear size of opening, the size of length × width × height is 300mm × 45mm × 135mm；
Briquetting group, it include four briquettings matched with rectangular through-hole, are provided with T fonts exhaust passage inside the briquetting, row
Three ports of gas passage are located at pressed surface and the left and right side of briquetting respectively；
Instrument is struck off, and which includes scraper plate, crossbeam, elastic adjusting knob and size adjusting knob, size is provided with the scraper plate
Scale, size adjusting knob include two clamping plates located at the side top of scraper plate, the crossbeam, and two clamping plate side edges are useful
In the recess for accommodating the scraper plate, the recess of two clamping plates is oppositely arranged and scraper plate is clamped between two clamping plates, by elastic regulation
Knob is fixed, and the scraper plate is slided up and down perpendicular to two clamping plates and relative to two clamping plates.
2. the mould of artificial side's rock core is prepared as claimed in claim 1, it is characterised in that the corner location of the square ring flat-plate
It is respectively equipped with suspension ring.
3. the mould of artificial side's rock core is prepared as claimed in claim 1, it is characterised in that the mold interior wall surfaces roughness
Ra≤0.025μm.
4. a kind of preparation method of artificial side's rock core, it is characterised in that comprise the steps：
(1) assembly jig；
(2) cementing agent is prepared：The cementing agent is mixed by mass percentage by polyester resin, curing agent, levelling agent and barium sulfate
Form, wherein, polyester resin weight/mass percentage composition is 80%～94%, and curing agent weight/mass percentage composition is 4.5%～14%, stream
Flat agent weight/mass percentage composition is 1%～5%, and barium sulfate weight/mass percentage composition is 0.5%～1.0%；
(3) dispensing is die-filling：Quartz sand, clay mineral and cementing agent are mixed in proportion, is loaded in the rectangular through-hole of mould；
(4) compressing：Briquetting and body die are fixed using bolt, the mould for having loaded is placed on a hydraulic press, in pressure
Precompressed 10min under the conditions of pressing pressure 50MPa～58MPa, then keeps constant pressure 50MPa voltage stabilizing 15min；
(5) it is heating and curing：Mould after by release is integrally put in high temperature oven, first toasts 240min, Ran Housheng at 98 DEG C
Temperature is finally warming up to 210 DEG C of baking 10min to 120 DEG C of baking 30min；
(6) demoulding：Rock core in the mould that process is heating and curing takes out, and dismantles base plate and briquetting bolt, and hydraulic press connection is hung
Ring lifts mould, then selects iron block support mode bottom, ejects rock core using briquetting, finally give the artificial Fang Yan of shaping
The heart.
5. the preparation method of artificial side's rock core as claimed in claim 4, it is characterised in that the cementing agent is mixed with quartz sand
It is 1 to close mass ratio:100～200.
6. the preparation method of artificial side's rock core as claimed in claim 4, it is characterised in that in step (3), by mixture
After adding mould, mould is put on vibrating device and is vibrated, then mixture surface is struck off with the instrument that strikes off, finally by briquetting
It is placed in mixture surface.
7. the preparation method of artificial side's rock core as claimed in claim 4, it is characterised in that also include that step (7) is cut：In sky
In gas, nitrogen or liquid nitrogen three, the lower cutting rock core two ends of any one atmosphere protection, obtain length, width, height respectively
Artificial side's rock core for 300mm, 45mm, 45mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621357086 | 2016-12-12 | ||
| CN2016213570864 | 2016-12-12 |
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| CN106501054A true CN106501054A (en) | 2017-03-15 |
| CN106501054B CN106501054B (en) | 2023-08-11 |
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| CN201720015746.9U Expired - Fee Related CN206321494U (en) | 2016-12-12 | 2017-01-06 | A kind of mould for preparing artificial side's rock core |
| CN201710010829.3A Active CN106501054B (en) | 2016-12-12 | 2017-01-06 | Mould for preparing artificial square rock core and preparation method of square rock core |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107160620A (en) * | 2017-05-26 | 2017-09-15 | 广东工业大学 | A kind of single mode mould for moulded of plastics material |
| CN109060484A (en) * | 2018-10-08 | 2018-12-21 | 中国海洋石油集团有限公司 | A kind of large scale rock core and preparation method thereof for permeability saturation curve measurement |
| CN111283935A (en) * | 2020-03-09 | 2020-06-16 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206321494U (en) * | 2016-12-12 | 2017-07-11 | 西南石油大学 | A kind of mould for preparing artificial side's rock core |
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