CN103471881B - Manufacturing method of visual totally-enclosed real core model and core model - Google Patents
Manufacturing method of visual totally-enclosed real core model and core model Download PDFInfo
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- CN103471881B CN103471881B CN201310364221.2A CN201310364221A CN103471881B CN 103471881 B CN103471881 B CN 103471881B CN 201310364221 A CN201310364221 A CN 201310364221A CN 103471881 B CN103471881 B CN 103471881B
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Abstract
The invention provides a visual fully-closed real core model and a manufacturing method thereof, wherein the manufacturing method comprises the steps of manufacturing a real core thin sheet (12), and then placing an upper glass sheet (11), the real core thin sheet (12), a lower glass sheet (13) and a carrying base plate (14) in a heating device to be heated until the upper glass sheet (11) and the lower glass sheet (13) are melted so as to obtain the core model. The core model manufactured by the method can ensure sealing, no leakage and no cracking under the conditions of high-temperature and high-pressure oil reservoirs, and has good light permeability.
Description
Technical field
The present invention relates to oil-gas field development experimental technique field, particularly a kind of manufacture method of visual totally-enclosed real core model, or a kind of core model.
Background technology
Microscopic seepage experiment is the important experimental technique of oil-gas field development field study mechanism, and its core content is the flow event observing microvisual model inner fluid.
For simulation High Temperature High Pressure oil reservoir seepage flow condition, microvisual model is divided into inner model and external model.Inner model is for observing medium, and the most conventional is glass model; External model provides high temperature and high pressure environment for inner model, possesses heating system and withstand voltage design.
At present, inner model is mainly glass etching model, is etched with various pattern at glass surface or simulates the plane pore channel of different rock core structure.Concise and to the point experimental procedure is as follows: be first connected with external model by glass model, and ensures junction sealing, and the fluid in external model cannot enter in glass model; Secondly external model is connected according to experiment flow; Again, progressively by external model and inner model gradually increasing temperature and pressure to design temperature, pressure; Finally, Seepage Experiment is carried out.
Current microscopic seepage is tested the glass model used and be there is the single problem of kind, and this is relevant with the method for making of Seepage Experiment condition drag.Normally be etched with pattern or pore texture at a flat glass, another flat glass covers on it.
Glass etching model plays an important role in the researchs such as nowed forming, fluid interface effect and oil displacement efficiency, but its pattern has very big-difference with the pore texture of true rock after all, and can not effect between Study of Fluid and rock solid phase, this severely limits the research of the important contents such as fluid structurecoupling.Also many researchers are had to adopt the glass model of back-up sand to simulate pore texture at present, although the relatively original glass etching model of the method has certain progress, except the hole between sand grains differs comparatively greatly with true core, its restriction of bearing pressure low does not also enough break through.The thin slice with height transmittancy ground according to true rock replaces sand-packed model, the puzzlement that it seals, pressure-bearing problem is still the most basic.
Summary of the invention
In order to the technical matters that the glass model solving the experiment of existing microscopic seepage exists in sealing and pressure-bearing, the invention provides a kind of manufacture method and core model of visual totally-enclosed real core model.The core model that the manufacture method of this visual totally-enclosed real core model produces can ensure under High Temperature High Pressure oil reservoir condition sealing, non-leakage, do not break, and this core model has good light penetrability.
The present invention is the technical scheme solving the employing of its technical matters: a kind of manufacture method of visual totally-enclosed real core model, comprises the following steps:
Step one: treat that mill rock core sheet, basic rock core sheet are together with substrate bonding by what be cascading;
Step 2: grind the surface of waiting to grind rock core sheet;
Step 3: will treat that mill rock core sheet is separated with basic rock core sheet, what separate treats that mill rock core sheet is true core thin slice;
Step 4: the upper glass plate be cascading, true core thin slice and lower-glass sheet are placed on loading backing plate;
Step 5: upper glass plate, true core thin slice, lower-glass sheet and loading backing plate are placed in heating arrangement and are heated to upper glass plate and the thawing of lower-glass sheet;
Step 6: cooling.
In step one, bonding together above first by the lower surface of basic rock core sheet and base material, then the upper surface of the lower surface and basic rock core sheet waiting to grind rock core sheet is bonded together.
What bonded together by the upper surface of the lower surface and basic rock core sheet waiting to grind rock core sheet is wax, and the thickness of this wax is 0.1mm ~ 0.5mm.
When needs in time grinding rock core sheet and basic rock core sheet bonds together, first will be smeared wax at the upper surface of basic rock core sheet and heat basic rock core sheet, and then will treat that mill rock core sheet is placed on basic rock core sheet.
In step 4, the area of true core thin slice is less than the area of upper glass plate, and the area of true core thin slice is less than the area of lower-glass sheet, the length of true core thin slice is 5cm ~ 10cm, the width of true core thin slice is 2cm ~ 5cm, and the thickness of true core thin slice is 0.3mm ~ 0.5mm.
In step 4, loading backing plate is ceramic backing plate, and first this ceramic backing plate adopts 1000 order ~ 1500 object porcelain earth to make base substrate according to pottery and be fired at 900 DEG C ~ 1000 DEG C by this base substrate.
In step 5, described heating is the gradient increased temperature according to 100 DEG C/h ~ 200 DEG C/h, is heated to 800 DEG C ~ 850 DEG C, is then incubated 10min ~ 20min.
In step 6, described in be cooled to before 600 DEG C, according to the gradient cooling of 200 DEG C/h, often reduce after 100 DEG C and be incubated 10min; Between 600 ~ 200 DEG C, according to the gradient cooling of 100 DEG C/h, after often reducing by 100 DEG C, be incubated 30min.
The core model be made up of above-mentioned manufacture method, this core model comprises the glass shell of true core thin slice and sealed envelope true core thin slice, and glass shell is provided with at least two through holes, and glass shell is without seam.
The thickness of true core thin slice is 0.3mm ~ 0.5mm, and the thickness of glass shell is 2mm ~ 3mm.
The invention has the beneficial effects as follows:
1. the manufacture method of this visual totally-enclosed real core model can make the glass melting state closely be wrapped up by true core thin slice according to the profile of true core thin slice, it is identical with confined pressure that visual totally-enclosed real core model outer formed bears pressure, is not subject to the restriction of model inside and outside differential pressure;
2. the manufacture method of this visual totally-enclosed real core model has ensured the light penetrability of visual totally-enclosed real core model;
3. the manufacture method of this visual totally-enclosed real core model is simple to equipment requirement, is applicable to all kinds of research institution.
Accompanying drawing explanation
Be described in further detail below in conjunction with the manufacture method of accompanying drawing to visual totally-enclosed real core model of the present invention.
Fig. 1 treats mill rock core sheet, the front view of basic rock core sheet together with substrate bonding.
Fig. 2 treats mill rock core sheet, the upward view of basic rock core sheet together with substrate bonding.
Fig. 3 is the placement sequential schematic of upper glass plate, true core thin slice and lower-glass sheet.
Fig. 4 is the placement sequential schematic of upper glass plate, true core thin slice, lower-glass sheet and loading backing plate before heating.
Fig. 5 is the schematic diagram of the core model made.
Wherein 1. treat mill rock core sheet, 2. basic rock core sheet, 3. base material, 4. wax, 5. seccotine, 11. upper glass plates, 12. true core thin slices, 13. lower-glass sheets, 131. through holes, 14. loading backing plates, 15. pallets, 16. glass shells.
Embodiment
Be described in detail below in conjunction with the manufacture method of accompanying drawing to visual totally-enclosed real core model of the present invention.The manufacture method of this visual totally-enclosed real core model comprises the following steps:
Step one: treat that mill rock core sheet 1, basic rock core sheet 2 and base material 3 bond together by what be cascading, as illustrated in figs. 1 and 2;
Step 2: grind the surface of waiting to grind rock core sheet 1;
Step 3: will treat that mill rock core sheet 1 is separated with basic rock core sheet 2, what separate treats that mill rock core sheet 1 is true core thin slice 12;
Step 4: the upper glass plate 11 be cascading, true core thin slice 12 and lower-glass sheet 13 are placed on loading backing plate 14, as shown in Figure 3 and Figure 4;
Step 5: upper glass plate 11, true core thin slice 12, lower-glass sheet 13 and loading backing plate 14 are placed in heating arrangement and are heated to upper glass plate 11 and lower-glass sheet 13 melts;
Step 6: cooling.
Glass sheet selected by base material 3, if will treat that mill rock core sheet 1 is directly bonding with base material 3, during cementing matter employing seccotine, and glass and wait that the adhesive surface ground between rock core sheet 1 can form very poor stained of light transmission; During cementing matter employing wax, the smooth surface of glass makes the ability of adhesive surface tolerance shearing force poor, and the shearing force of bearing at the thinner adhesive surface of thin slice is larger, very easily occurs that thin slice comes off from glass, thin slice is badly damaged; In addition, because sheet thickness requires very little, grinding in process, very easily causing in uneven thickness, and occurring the phenomenon that glass sheet edges is also polished, serious obstruction polishing process.So have employed stacked setting treated that mill rock core sheet 1, basic rock core sheet 2 and base material 3 bond together, after grind the method for waiting to grind rock core sheet 1 again.
In step one, bonding together above first by the lower surface of basic rock core sheet 2 and base material 3, then the upper surface of the lower surface and basic rock core sheet 2 waiting to grind rock core sheet 1 is bonded together, basic rock core sheet 2 and base material 3 bond together and define collet.In step one, the length of basic rock core sheet 2 is 5cm ~ 10cm, and the width of basic rock core sheet 2 is 2cm ~ 5cm, and the thickness of basic rock core sheet 2 is 0.2cm ~ 0.5cm.
What bonded together by the upper surface of the lower surface and basic rock core sheet 2 waiting to grind rock core sheet 1 is wax 4, waits that the thickness of the wax layer 4 ground between rock core sheet 1 and basic rock core sheet 2 is 0.1mm ~ 0.5mm.The material of basis rock core sheet 2 and treat that the material of mill rock core sheet 1 should be identical or close.Namely select and wait to grind rock core sheet 2 based on rock particle diameter and the close rock core sheet of degree of roughness.Reason is under identical or close condition, and shearing force receiving area when two rock core sheet waxes are bonded together and force value all reach maximum, namely ensures to treat that mill Rock laminate 1 can not come off from collet, also ensure to treat mill rock core sheet 1 keep complete, not damaged.
Basis rock core sheet 2 bonds with base material 3.Adopt water-fast seccotine 5 to bond basic rock core sheet 2 and base material 3, seccotine will have certain viscosity, and when ensureing bonding, basis rock core sheet 2 realizes face with base material 3 and contacts; Seccotine is wanted to penetrate in the hole of basic rock core sheet 2 simultaneously, and sand grains when ensureing stressed on basis rock core sheet 2 is firmly motionless.After seccotine solidifies, should have enough rigidity, this seccotine 5 is epoxide-resin glue.
Base material 3 selects the reason of glass sheet to have the horizontality of two: one glass sheet planes very high, is to treat that mill rock core sheet 1 thickness grinds uniform basic guarantee; Two, when boning with basic rock core sheet 2, can observe bond quality.
Then basic rock core sheet 2 is polished.After basis rock core sheet 2 and base material 3 bond together, by the polishing of the top of the basic rock core sheet 2 after bonding, select sand paper order footpath close with the rock particle diameter of basic rock core sheet 2.Ready for waiting the bonding of grinding rock core sheet 1.
When needs in time grinding rock core sheet 1 and basic rock core sheet 2 bonds together, first will be smeared wax at the upper surface of basic rock core sheet 2 and heat basic rock core sheet 2, and then will treat that mill rock core sheet 1 is placed on basic rock core sheet 2.To be placed on after on basic rock core sheet 2 until mill rock core sheet 1, and move back and forth at the upper surface of basic rock core sheet 2 and treat mill rock core sheet 1, and then treat mill rock core sheet 1 and apply downward pressure.
Specifically, treat that mill rock core sheet 1 first should under the condition that overall holding capacity is stronger, both sides polish.Melt a certain amount of wax, spread upon on the basic rock core sheet 2 of collet.To treat that mill rock core sheet 1 lies on basic rock core sheet 2, and then from bottom even heating collet, move around gently with tweezers and treat mill rock core sheet 1.When the wax melted is from when uniformly penetrating comes wait the hole grinding rock core sheet 1, withdraw heating source.Push down downwards gently and treat that mill rock core sheet 1 makes it and collet close contact, after liquid wax is solidified, remove pressure, allow rock core sheet naturally cool.
In step 2, muller water mill is used to wait to grind the upper surface of rock core sheet 1, the rotating speed of muller is 200 turns/min ~ 500 turn/min.Specifically, do not grind higher than 200 turns/min Water Under at rotating speed.If time directly control collet with hand, then firmly not excessive, otherwise easily cause and treat that the wearing and tearing of mill rock core sheet 1 two ends are very fast, form the phenomenon of the thin thick middle in two ends.The initial stage that grinds selects the sand paper that particle diameter is larger, when when the thickness of mill rock core sheet 1 is 0.5mm ~ 1mm, select 600 order ~ 1000 object sand paper to treat mill rock core sheet 1 to grind, when when the thickness of mill rock core sheet 1 is for being less than 0.5mm and being more than or equal to 0.3mm, select 1000 order ~ 5000 object sand paper to treat mill rock core sheet 1 and grind.Grind process need through conventional vernier caliper measurement, ensure that the thickness in the face that grinds is even.
In step 3, will treat that mill rock core sheet 1, basic rock core sheet 2 and base material 3 put into boiling water simultaneously, and make to treat that mill rock core sheet 1 is separated with basic rock core sheet 2.Specifically, when rock core sheet thickness reaches standard, put into boiling water by being with the collet needing to grind rock core sheet 1 and soak, bottom even heats, and treats that first mill rock core sheet 1 strips down from collet.Continuous heating 1 hour, then wait that the intrapore wax major part of grinding rock core sheet 1 also can be cleaned out.
After step 3, will treat that mill rock core sheet 1 is put into heating arrangement heating and treated, make the residue gasification of waiting to grind rock core sheet 1 surface.Specifically, by taking out until mill rock core sheet 1 after washing, dry after, put into the remaining wax of muffle furnace high-temperature gasification, temperature 900 DEG C, time 20min.After Slow cooling, treat that mill rock core sheet 1 is required petrographic thin section, this petrographic thin section completes.If remaining wax is higher in core wafer, then produce harmful effect when glass model makes.
Core wafer as microscopic observation requires that it has light transmission, and the image collected should be able to clear reflection percolation phenomenon, thus requires that the thickness of thin slice is less than 0.5mm.Limit by existing microscopic seepage experiment flow, sheet length and width should be not less than 8cm and 2cm.Rock core is when 0.5mm thickness, and the acting force of cementing matter and faint between rock particles, is easy to damaged.It is uneven that larger area (8cmX2cm) also makes easily to occur in bruting process on thickness, has an impact when degree is greater than 0.1mm to observation.Common grinding technique can only reach the thickness of 0.8mm usually; Casting body flake method for making is also inadvisable, and reason is: one injects the metal body of casting material contamination rock core in rock, and after thin slice makes, the body of casting still occupies pore space, does not possess experiment condition; Two thin slice areas are less, cannot reach the requirement required for microcosmos experiment.
Explore formed Ginding process system of sealing with wax solve the problems referred to above, the true petrographic thin section thickness of making reaches 0.3mm(3 grain diameter), area (8cmX2cm), save the full details such as the solid phase components of rock, pore texture and connectivity.
Step one to step 3 is mainly the process manufacturing true core thin slice 12, and step 4 to step 6 is mainly the process manufacturing core model.
The manufacture method of this visual totally-enclosed real core model can by true core thin slice 12 sealed envelope in glass, thus the full details such as the solid phase components of rock, pore texture and connectivity can be preserved, overcome the shortcoming that glass etching model only has venturi simulation.The glass of molten state, while close contact rock surface, does not infiltrate in the hole of rock on the one hand, ensure that this true core hole is not contaminated; Glass and true core become overall on the other hand, and sealing is strong, and the ability of bearing external pressure significantly improves.The manufacture method of this visual totally-enclosed real core model had both maintained the ability that glass permeability is convenient to observe rock core, also solved glass surface with true core thin slice 12 face seal and the key problem of energy pressure-bearing.
In real core model evolution, also run into the problem similar with sand-packed model, and the order of severity more very.Reason is the ability that true core does not possess slowly adjustment, even its surface of the true model of polishing also exists the fluctuating gap of 0.1mm.When confined pressure raises, be easy to break, comparatively sand-packed model is low for its confined pressure ability to bear.Filled out by transparent colloid in Rock laminate both sides in research, to forming the effect merged with glassy phase, then even the and area of pressure-bearing improves greatly.But it exists fatal shortcoming, namely transparent colloid partial penetration enters blowhole, pollutes rock texture; And colloid is different from the index of refraction of glass, cause Permeability surface very poor.Above two reasons limit the development of real core model.And the visual totally-enclosed real core model that the manufacture method of visual totally-enclosed real core model of the present invention produces can solve the problems of the technologies described above.
Introduce the manufacture method of core model of the present invention below in detail:
In step 4, the area of true core thin slice 12 is less than the area of upper glass plate 11, and the area of true core thin slice 12 is less than the area of lower-glass sheet 13, as shown in Figure 3 and Figure 4.Wherein, the length of true core thin slice 12 is 5cm ~ 10cm, and the width of true core thin slice 12 is 2cm ~ 5cm, and the thickness of true core thin slice 12 is 0.3mm ~ 0.5mm.Upper glass plate 11 and lower-glass sheet 13 are optical glass sheet, and this optical glass sheet has high light transmittance, high cleanliness, and its softening point is between 600 ~ 700 DEG C, thickness 3mm.
In step 4, loading backing plate 14 is ceramic backing plate, and first this ceramic backing plate adopts 1000 order ~ 1500 object porcelain earth to make base substrate according to pottery and be fired at 900 DEG C ~ 1000 DEG C by this base substrate.In the present embodiment, the making of loading backing plate 14, first adopt 1200 order porcelain earth to make base substrate according to pottery, step comprises: with mud, beat, shape processed, moisturizing are dried, repair and two ends polish.Base substrate carry out after not glazing, be fired into ceramic backing plate at low temperature (less than 1000 DEG C).
Introduce the advantage using this loading backing plate 14 below, the requirement of loading backing plate 1 is the heat-resistant board that two ends are smooth, surface is fine and smooth, heat conductivity is poor, is difficult to meet in marketing.Pottery, ceramic products is bi-material the most close, but due to pottery, porcelain commodity all can in surperficial glazing, and enamel material more than 900 DEG C time, the glass of melting state can melt with it mutually, and after cooling, glass is bonded on pad.The shortcoming of refractory brick material is rough surface, and the glass surface fired is too coarse.The shortcoming of sheet metal is that heat conductivity is good, and glass heat conduction is poor, the heat transfer of interior rock thin slice is very poor, and in temperature-fall period, corresponding surface of contact differential contraction stress disunity, causes glass be full of cracks, petrographic thin section fragmentation.Also attempt with float glass production method analogue formation.That is: utilize the buoyancy of liquid tin to be lifted by glass, advantage is that lower glass surface center section is very smooth.Shortcoming is: tin and glass surface have film-form to immerse; The interfacial tension of tin and glass is comparatively large, and there is darker indenture lower glass surface marginal portion; High temperature tin is oxidized seriously in atmosphere, and part tin gasifies, and pollutes heavy.Thus the visible advantage using this loading backing plate 14.In addition, this loading backing plate 14 after each, needs effects on surface again to polish, and effect is that removing surface is stained, guarantee surfacing.
In step 4, the thickness of upper glass plate 11 is 2mm ~ 3mm, and the thickness of lower-glass sheet 13 is 2mm ~ 3mm, and lower-glass sheet 13 is provided with and is communicated with the outside of lower-glass sheet 13 and two through holes 131 of true core thin slice 12.The effect of these two through holes 131 forms the entrance of fluid and the outlet of fluid on the surface of this core model after this visual totally-enclosed real core model is made, and is convenient to Germicidal efficacy.
Before step 5, need the preparation before heating, first check true core thin slice 12 whether through the step of boiling water paraffin removal, high-temperature gasification wax; Secondly check whether upper glass plate 11 and lower-glass sheet 13 clean, if there is spot, use alcohol wipe.Again order shown in upper glass plate 11, true core thin slice 12 and lower-glass sheet 13 Fig. 3 is placed, and be placed on and place in the pallet 15 of loading backing plate 14, see Fig. 4.
In step 5, described heating is the gradient increased temperature according to 100 DEG C/h ~ 200 DEG C/h, is heated to 800 DEG C ~ 850 DEG C, is then incubated 10min ~ 20min.Specifically in the present embodiment, pallet 15 is put into muffle furnace, according to the gradient increased temperature of 200 DEG C/h, maximum temperature is set to 800 DEG C, be incubated constant 10min, upper glass plate 11 and lower-glass sheet 13 at high temperature reach melting state, and the edge of upper glass plate 11 can flow downward after melting and under gravity together with the Fusion Edges of lower-glass sheet 13, true core thin slice 12 is integral with the two panels glass sintering of molten, makes the surface of rock core completely identical with glassy phase.Wherein, the maximum heating temperature of muffle furnace 1200 DEG C, pallet is the porcelain dish that more than 1200 DEG C high temperature are formed.
In step 6, described in be cooled to before 600 DEG C, according to the gradient cooling of 200 DEG C/h, often reduce after 100 DEG C and be incubated 10min; Between 600 ~ 200 DEG C, according to the gradient cooling of 100 DEG C/h, after often reducing by 100 DEG C, be incubated 30min.The object of this process eliminates differential contraction stress in glass.
Time below 200 DEG C, this heating arrangement can stop heating, and allows this core model naturally cool with stove in heating arrangement.During cool to room temperature, take out this core model, as shown in Figure 5.
After step 6, precision and polishing are carried out to this core model.This core model sintered, in the bonding of lower surface some fine particle kaolin unavoidable, adopts 1500 order sand paper water mills, guarantees petrographic thin section partially transparent, limpid, polishing afterwards.
The manufacture method of this visual totally-enclosed real core model can by integral for the two panels glass sintering of core wafer and molten, make rock surface completely identical with glassy phase, when confined pressure increases, overall rock surface (no matter projecting point and low-lying point) evenly bears pressure, the overall voltage endurance capability of model strengthens greatly, identical with the confined pressure limit.Meanwhile, the glass of molten still maintains larger viscosity, can not penetrate into blowhole, does not affect the perviousness of thin slice.Clear model, transparent.
A kind of core model be made up of above-mentioned manufacture method, this core model comprises the glass shell 16 of true core thin slice 12 and sealed envelope true core thin slice 12, glass shell 16 is provided with at least two through holes 131, glass shell 16 without seam and adhesive-free, as described in Figure 5.
In core model, the length of true core thin slice 12 is 5cm ~ 10cm.The width of true core thin slice 12 is 2cm ~ 5cm.The thickness of true core thin slice 12 is 0.3mm ~ 0.5mm, and the thickness of glass shell 16 is 2mm ~ 3mm.The length of this visual totally-enclosed real core model is 6cm ~ 12cm.The width of this visual totally-enclosed real core model is 4cm ~ 9cm.The diameter of through hole 131 is 0.2cm ~ 0.3cm.
In the preparatory stage, if core wafer paraffin removal is insufficient or use other Organic cementing substance to grind rock core, then in sintering process, there will be glass blow-up, petrographic thin section and glass contact face minute bubbles and gather the phenomenon such as dirty with glass outer surface.Reason is: the softening point of glass is between 600 ~ 700 DEG C, and namely during this heating temperatures, upper sheet glass slowly softens, and edge stretches under gravity, landing formed closed with lower sheet glass.Temperature continues to raise, and remaining wax or cementing matter continue gasification, and this part gas causes the generation of above-mentioned phenomenon.
The manufacture method of this visual totally-enclosed real core model can make the glass melting state closely be wrapped up by true core thin slice according to the profile of true core thin slice, it is identical with confined pressure that visual totally-enclosed real core model outer formed bears pressure, is not subject to the restriction of model inside and outside differential pressure; The manufacture method of this visual totally-enclosed real core model has ensured the light penetrability of visual totally-enclosed real core model; The manufacture method of this visual totally-enclosed real core model is simple to equipment requirement, is applicable to all kinds of research institution.
The above, be only specific embodiments of the invention, can not limit the scope that invention implements with it, so the displacement of its equivalent assemblies, or the equivalent variations done according to scope of patent protection of the present invention and modification, all still should belong to the category that this patent is contained.
Claims (10)
1. a manufacture method for visual totally-enclosed real core model, is characterized in that, the manufacture method of described visual totally-enclosed real core model comprises the following steps:
Step one: treat that mill rock core sheet (1), basic rock core sheet (2) and base material (3) bond together by what be cascading; The material on basis rock core sheet (2) is identical with treating the material of mill rock core sheet (1);
Step 2: grind the surface of waiting to grind rock core sheet (1);
Step 3: will treat that mill rock core sheet (1) is separated with basic rock core sheet (2), what separate treats that mill rock core sheet (1) is true core thin slice (12);
Step 4: the upper glass plate be cascading (11), true core thin slice (12) and lower-glass sheet (13) are placed on loading backing plate (14);
Step 5: upper glass plate (11), true core thin slice (12), lower-glass sheet (13) and loading backing plate (14) are placed in heating arrangement and are heated to upper glass plate (11) and lower-glass sheet (13) thawing; The edge of upper glass plate (11) flows downward after melting and under gravity together with the Fusion Edges of lower-glass sheet (13), and upper glass plate (11) and the lower-glass sheet (13) of true core thin slice (12) and molten are sintered into one;
Step 6: cooling.
2. the manufacture method of visual totally-enclosed real core model according to claim 1, it is characterized in that: in step one, bonding together above first by the lower surface of basic rock core sheet (2) and base material (3), then will treat that the lower surface of mill rock core sheet (1) and the upper surface of basic rock core sheet (2) bond together.
3. the manufacture method of visual totally-enclosed real core model according to claim 2, it is characterized in that: what bonded together by the upper surface of the lower surface and basic rock core sheet (2) waiting to grind rock core sheet (1) is wax, and the thickness of this wax is 0.1mm ~ 0.5mm.
4. the manufacture method of visual totally-enclosed real core model according to claim 2, it is characterized in that: when needs will in time grinding rock core sheet (1) and basic rock core sheet (2) bonds together, first smear wax at the upper surface of basic rock core sheet (2) and basic rock core sheet (2) is heated, and then will treat that mill rock core sheet (1) is placed on basic rock core sheet (2).
5. the manufacture method of visual totally-enclosed real core model according to claim 1, it is characterized in that: in step 4, the area of true core thin slice (12) is less than the area of upper glass plate (11), and the area of true core thin slice (12) is less than the area of lower-glass sheet (13), the length of true core thin slice (12) is 5cm ~ 10cm, the width of true core thin slice (12) is 2cm ~ 5cm, and the thickness of true core thin slice (12) is 0.3mm ~ 0.5mm.
6. the manufacture method of visual totally-enclosed real core model according to claim 1, it is characterized in that: in step 4, loading backing plate (14) is ceramic backing plate, this ceramic backing plate first adopt 1000 order ~ 1500 object porcelain earth according to pottery make base substrate again this base substrate is fired at 900 DEG C ~ 1000 DEG C, this base substrate carry out after not glazing.
7. the manufacture method of visual totally-enclosed real core model according to claim 1, it is characterized in that: in step 5, described heating is the gradient increased temperature according to 100 DEG C/h ~ 200 DEG C/h, is heated to 800 DEG C ~ 850 DEG C, is then incubated 10min ~ 20min.
8. the manufacture method of visual totally-enclosed real core model according to claim 7, is characterized in that: in step 6, described in be cooled to before 600 DEG C, according to the gradient cooling of 200 DEG C/h, often reduce after 100 DEG C and be incubated 10min; Between 600 ~ 200 DEG C, according to the gradient cooling of 100 DEG C/h, after often reducing by 100 DEG C, be incubated 30min.
9. the core model be made up of the manufacture method in claim 1 ~ 8 described in any one, it is characterized in that: this core model comprises the glass shell (16) of true core thin slice (12) and sealed envelope true core thin slice (12), glass shell (16) is provided with at least two through holes (131), and glass shell (16) is without seam.
10. core model according to claim 9, is characterized in that: the thickness of true core thin slice (12) is 0.3mm ~ 0.5mm, and the thickness of glass shell (16) is 2mm ~ 3mm.
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| CN108303348B (en) * | 2017-12-20 | 2020-07-14 | 中国石油化工股份有限公司 | Device and system for simulating tensile degradation characteristics of polymer in oil reservoir pore throat |
| CN110733192B (en) * | 2019-10-08 | 2020-07-17 | 中国矿业大学 | Manufacturing method of organic glass tube for sandstone seepage model |
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| CN1035496C (en) * | 1993-04-29 | 1997-07-23 | 西北大学 | Micro-pore model of true reservior rock and making technology thereof |
| CN1996010A (en) * | 2006-01-06 | 2007-07-11 | 中国石油天然气股份有限公司 | Method for manufacturing visual pore-level planar model |
| CN102768812B (en) * | 2011-05-06 | 2015-02-11 | 中国科学院理化技术研究所 | Visual microscopic model of real core and manufacturing method thereof |
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