CN104974740A - Preparation method of low density film-coated ceramsite - Google Patents
Preparation method of low density film-coated ceramsite Download PDFInfo
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- CN104974740A CN104974740A CN201510320640.5A CN201510320640A CN104974740A CN 104974740 A CN104974740 A CN 104974740A CN 201510320640 A CN201510320640 A CN 201510320640A CN 104974740 A CN104974740 A CN 104974740A
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- Prior art keywords
- low density
- density film
- finished product
- coated
- work
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
- C09K8/805—Coated proppants
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
- C04B41/83—Macromolecular compounds
Abstract
The invention discloses a preparation method of low density film-coated ceramsite. The preparation method comprises adding silica powder, clay powder and chlorite powder into siliceous mineral as a main raw material, carrying out uniform mixing, carrying out nodulizing by a nodulizing pot to obtain a semi-finished product, carrying out calcination on the semi-finished product in a rotary kiln or a tunnel kiln to obtain a semi-finished product low density film-coated ceramsite base, and uniformly coating the semi-finished product low density film-coated ceramsite base with a resin film by a resin film coating production line to obtain the low density film-coated ceramsite finished product. The preparation method greatly reduces ceramsite density, greatly reduces a breaking rate, improves a diversion capability and satisfies carbon dioxide dry method pressing crack ultra low viscosity operating fluid construction requirements.
Description
Technical field
The present invention relates to technical field of petroleum extraction, particularly relate to a kind of preparation method of low density film-coated ceramisite.
Background technology
The main method that hydraulic fracturing technology increases production as low-permeability oil gas well, has been widely used in the exploitation of various oil-gas field, and petroleum fracturing propping agent is then hydraulic fracfuring treatment Technology success and effective critical material.When low-permeability oil gas well is exploited, for making depths, stratum rock fracture keep cracking state, petroleum fracturing propping agent need be used as upholder.The man-made fracture that the support that the fracturing liquid containing propping agent by high-pressure pump handlebar injects Reservoir Fracture presses off, for oil gas circulation provides the permanently effective passage of hypertonicity, thus improves oil gas flow conductivity, improves Oil/gas Well output.Therefore require that propping agent used has lower density, better suspension property, greatly reduce propping agent resistance to flow in crack, successfully realize massive hydraulic fracture; There is lower percentage of damage, higher long-term flow conductivity and low cost, low-permeability oil gas well just can be made to be formed there is throughput steady in a long-term, realize economic benefit development of fields.
Petroleum fracturing propping agent is mainly divided three classes: natural siliceous sand, alundum goods and haydite.Quartz sand, due to shortcomings such as intensity is low, easy fragmentations, is only applicable to the waterfrac treatment of shallow well, low locking pressure hydrocarbon zone.Because most of oil gas well belongs to middle deep, thus the much more external alundum goods adopting hardness non-friable greatly as in, the fracturing propping agents of deep-seated oil gas well; But this propping agent raw material sources difficulty, complete processing is complicated, and preparation cost is high, applies restricted.And ceramsite propping agent raw material sources is extensive, product strength is high, density is low, receives the concern of people.Therefore, haydite is the main development direction of following low cost petroleum fracturing propping agent.
At present, the ceramsite propping agent of application mainly forms for raw material sinters with bauxitic clay, potassium felspar sand, clay, wilkinite, rhombspar, wollastonite, iron powder etc.Before patent of the present invention, the volume density of the haydite that each oil field well pressing crack construction uses is 1.55g/cm
3-1.95g/cm
3and locking pressure be under 52MPa percentage of damage up to 4%-8%, such propping agent settling velocity in pressing crack construction is fast, and high water conservancy diversion demand under being difficult to meet low laid concentration, is especially not suitable for the construction demand of carbonic acid gas dry method pressure break ultra-low viscosity working fluid.
Summary of the invention
The embodiment of the present application is by providing a kind of preparation method of low density film-coated ceramisite, for oil, gas, water layer pressing crack construction provide a kind of density significantly lower than other haydites, and significantly can reduce percentage of damage, raising flow conductivity, be applicable to the of the fracturing fluid haydite of carbonic acid gas dry method pressing crack construction low viscosity.
The application provides following technical scheme by an embodiment of the application:
A preparation method for low density film-coated ceramisite, comprising:
Siliceous mineral is allocated into ground silica, clay powder, green mud stone flour, balling-up in ball pot processed after being mixed evenly, obtained work in-process as main raw material;
By described work in-process in rotary kiln or tunnel furnace through calcining, obtained work in-process low density film-coated ceramisite matrix;
Described work in-process low density film-coated ceramisite matrix is passed through resin coating production line through even wrapped resin coating, obtain low density film-coated ceramisite finished product.
Preferably, described siliceous mineral, comprising:
Olive stone flour,
Boron mud,
Chlorite, in one or more.
Preferably, the order number of described olive stone flour, boron mud, green mud stone flour, ground silica, clay powder is between 400 order-800 orders.
Preferably, the mass percent of described siliceous mineral is 20%-85%, and the mass percent of described ground silica is 5%-45%, and the mass percent of described clay powder is 2%-20%, and the mass percent of described green mud stone flour is 15%-40%.
Preferably, described by described work in-process in rotary kiln or tunnel furnace through calcining obtained work in-process low density film-coated ceramisite matrix, comprising:
By described work in-process in 1000 DEG C of-1300 DEG C of rotary kilns or tunnel furnace through calcining 3 hours-8 hours obtained work in-process low density film-coated ceramisite matrixes.
Preferably, described by described work in-process low density film-coated ceramisite matrix by resin coating production line through even wrapped resin coating, obtained low density film-coated ceramisite finished product, comprising:
By described work in-process low density film-coated ceramisite matrix by resin coating production line at 150 DEG C-300 DEG C through even wrapped resin coating 30 minutes-60 minutes, obtained low density film-coated ceramisite finished product.
Preferably, described boron mud is by the mineral waste of discharging when boron magnesium ore deposit or paigeite carbon alkaline process borax, may also be by the mineral waste of discharging when boron magnesium ore deposit or paigeite acidolysis single stage method preparing boric acid.
The one or more technical schemes provided in the embodiment of the present application, at least have following technique effect or advantage:
1, in the embodiment of the present application, replace aluminium ore for main raw material with siliceous mineral, and increase by haydite surface coating mode the method that haydite intensity reduces percentage of damage, preparation high strength, low density fracturing propping agents, the siliceous mineral that the method maturing temperature is low, utilize density low, inexpensive or industrial residue replace the aluminium ore that density is high, price is higher, the production cost of fracturing propping agents is lower, and significantly reduces the density of haydite.
2, in the embodiment of the present application, described boron mud is by the mineral waste of discharging when boron magnesium ore deposit or paigeite carbon alkaline process borax, may also be by the mineral waste of discharging when boron magnesium ore deposit or paigeite acidolysis single stage method preparing boric acid, has energy-saving and emission-reduction, the advantage of environmental protection.
3, in the embodiment of the present application, adopting formula of the present invention to prepare fracturing propping agents, is the fracturing propping agents of main raw material because raw material composition is different from bauxitic clay, fires and the low density film-coated ceramisite volume density that overlay film obtains can reach 1.2g/cm
3-1.3g/cm
3, SYT5108-2006 industry standard measures, and its product percentage of damage under 52MPa locking pressure is less than 3%, far below industry standard, improves flow conductivity, is applicable to the construction demand of carbonic acid gas dry method pressure break ultra-low viscosity working fluid.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schema of the preparation method of low density film-coated ceramisite in the application.
Embodiment
The embodiment of the present application is by providing a kind of preparation method of low density film-coated ceramisite, for oil, gas, water layer pressing crack construction provide a kind of density significantly lower than other haydites, and significantly can reduce percentage of damage, raising flow conductivity, be applicable to the of the fracturing fluid haydite of carbonic acid gas dry method pressing crack construction low viscosity.
The technical scheme of the embodiment of the present application is for solving the problems of the technologies described above, and general thought is as follows:
A preparation method for low density film-coated ceramisite, as shown in Figure 1, comprising:
Step S101: allocate siliceous mineral into ground silica, clay powder, green mud stone flour as main raw material, balling-up in ball pot processed after being mixed evenly, obtained work in-process;
Step S102: by described work in-process in rotary kiln or tunnel furnace through calcining, obtained work in-process low density film-coated ceramisite matrix;
Step S103: described work in-process low density film-coated ceramisite matrix is passed through resin coating production line through even wrapped resin coating, obtain low density film-coated ceramisite finished product.
For example: (example one)
By 500kg 300 object containing SiO
230% (weight, as follows), MgO
3the olive stone flour of 5%, 200kg 200 object is containing SiO
258%, MgO
2the talcum powder of 5%, 100kg 400 order is containing SiO
2the ground silica of 97%, 100kg 200 object is containing SiO
265%, Al
3o
3the feldspar in powder of 13%, 50kg 200 object is containing SiO
254%, Al
3o
3the clay breeze of 30%, 50kg 300 object is containing SiO
236%, Al
3o
37%, the green mud stone flour of MgO 56%; add in mixer respectively and fully mix; then in ball pot processed, 20/40 object work in-process are made; work in-process in rotary kiln in 1100 DEG C-1200 DEG C roasting 4h; work in-process low density film-coated ceramisite matrix is obtained through cooling and heat recuperation; then resin coating production line is passed through through even wrapped resin coating 50min-60min at 160 DEG C-180 DEG C, obtained low density film-coated ceramisite finished product, volume density 1.23g/cm-1.28g/cm
3, 52MPa percentage of damage 0.9%-1.8%.
For example: (example two)
By 300kg 800 object containing SiO
2the olive stone flour of 35% (weight, as follows), MgO 40%, 400kg 200 object is containing SiO
227%, the boron mud powder of MgO 39%, 150kg 400 order is containing SiO
2the ground silica of 97%, 70kg 200 object is containing SiO
265%, Al
3o
3the feldspar in powder of 13%, 60kg 200 object is containing SiO
254%, Al
3o
3the clay breeze of 30%, 20kg 300 object is containing SiO
236%, Al
3o
37%, the green mud stone flour of MgO 56%; in ball pot processed, 20/40 order or 30/50 object work in-process are made after mixing in mixer; work in-process in rotary kiln in 1200 DEG C-1280 DEG C roasting 3h; work in-process low density film-coated ceramisite matrix is obtained through cooling and heat recuperation; then resin coating production line is passed through at 190 DEG C-210 DEG C through even wrapped resin coating 30min-40min; obtained low density film-coated ceramisite finished product, volume density 1.26g/cm
3-1.29g/cm
3, 52MPa percentage of damage 0.6%-1.4%.
For example: (example three)
By 100kg 300 object containing SiO
2the olive stone flour of 30% (weight, as follows), MgO 35%, 200kg 200 object is containing SiO
227%, the boron mud powder of MgO 39%, 250kg 600 object is containing SiO
239%, the snake stone flour of MgO 38%, 200kg 400 order is containing SiO
2the ground silica of 97%, 150kg 200 object is containing SiO
265%, Al
3o
3the feldspar in powder of 13%, 50kg 400 object is containing SiO
254%, Al
3o
3the clay breeze of 30%, 50kg 200 object is containing SiO
236%, Al
3o
37%, the green mud stone flour of MgO 56%; add in mixer respectively and fully mix; then in ball pot processed, 20/40 order or 30/50 object work in-process are made; work in-process in rotary kiln in 1230 DEG C-1280 DEG C roasting 5h; work in-process low density film-coated ceramisite matrix is obtained through cooling and heat recuperation; then resin coating production line is passed through through even wrapped resin coating 40min-50min at 170 DEG C-190 DEG C, obtained low density film-coated ceramisite finished product, volume density 1.22g/cm
3-1.25g/cm
3, 52MPa percentage of damage 0.6%-1.8%.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
1, in the embodiment of the present application, replace aluminium ore for main raw material with siliceous mineral, and increase by haydite surface coating mode the method that haydite intensity reduces percentage of damage, preparation high strength, low density fracturing propping agents, the siliceous mineral that the method maturing temperature is low, utilize density low, inexpensive or industrial residue replace the aluminium ore that density is high, price is higher, the production cost of fracturing propping agents is lower, and significantly reduces the density of haydite.
2, in the embodiment of the present application, described boron mud is by the mineral waste of discharging when boron magnesium ore deposit or paigeite carbon alkaline process borax, may also be by the mineral waste of discharging when boron magnesium ore deposit or paigeite acidolysis single stage method preparing boric acid, has energy-saving and emission-reduction, the advantage of environmental protection.
3, in the embodiment of the present application, adopting formula of the present invention to prepare fracturing propping agents, is the fracturing propping agents of main raw material because raw material composition is different from bauxitic clay, fires and the low density film-coated ceramisite volume density that overlay film obtains can reach 1.2g/cm
3-1.3g/cm
3, SYT5108-2006 industry standard measures, and its product percentage of damage under 52MPa locking pressure is less than 3%, far below industry standard, improves flow conductivity, is applicable to the construction demand of carbonic acid gas dry method pressure break ultra-low viscosity working fluid.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. a preparation method for low density film-coated ceramisite, is characterized in that, comprising:
Siliceous mineral is allocated into ground silica, clay powder, green mud stone flour, balling-up in ball pot processed after being mixed evenly, obtained work in-process as main raw material;
By described work in-process in rotary kiln or tunnel furnace through calcining, obtained work in-process low density film-coated ceramisite matrix;
Described work in-process low density film-coated ceramisite matrix is passed through resin coating production line through even wrapped resin coating, obtain low density film-coated ceramisite finished product.
2. the method for claim 1, is characterized in that, described siliceous mineral, comprising:
Olive stone flour,
Boron mud,
Chlorite, in one or more.
3. method as claimed in claim 2, it is characterized in that, the order number of described olive stone flour, boron mud, green mud stone flour, ground silica, clay powder is between 400 order-800 orders.
4. method as claimed in claim 3, it is characterized in that, the mass percent of described siliceous mineral is 20% ~ 85%, and the mass percent of described ground silica is 5%-45%, the mass percent of described clay powder is 2%-20%, and the mass percent of described green mud stone flour is 15%-40%.
5. method as claimed in claim 4, is characterized in that, described by described work in-process in rotary kiln or tunnel furnace through calcining obtained work in-process low density film-coated ceramisite matrix, comprising:
By described work in-process in 1000 DEG C of-1300 DEG C of rotary kilns or tunnel furnace through calcining 3 hours-8 hours obtained work in-process low density film-coated ceramisite matrixes.
6. method as claimed in claim 5, is characterized in that, described by described work in-process low density film-coated ceramisite matrix by resin coating production line through even wrapped resin coating, obtained low density film-coated ceramisite finished product, comprising:
By described work in-process low density film-coated ceramisite matrix by resin coating production line at 150 DEG C-300 DEG C through even wrapped resin coating 30 minutes-60 minutes, obtained low density film-coated ceramisite finished product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201221A (en) * | 2017-05-26 | 2017-09-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of CO2The method that dry method pressure break functional material coats proppant |
| CN107267135A (en) * | 2017-06-30 | 2017-10-20 | 周远华 | A kind of proppant and preparation method thereof |
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Cited By (2)
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| CN107201221A (en) * | 2017-05-26 | 2017-09-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of CO2The method that dry method pressure break functional material coats proppant |
| CN107267135A (en) * | 2017-06-30 | 2017-10-20 | 周远华 | A kind of proppant and preparation method thereof |
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Application publication date: 20151014 |