WO2012041004A1 - 一种疏水支撑剂及其制备方法 - Google Patents
一种疏水支撑剂及其制备方法 Download PDFInfo
- Publication number
- WO2012041004A1 WO2012041004A1 PCT/CN2011/001558 CN2011001558W WO2012041004A1 WO 2012041004 A1 WO2012041004 A1 WO 2012041004A1 CN 2011001558 W CN2011001558 W CN 2011001558W WO 2012041004 A1 WO2012041004 A1 WO 2012041004A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hydrophobic
- resin
- proppant
- coating resin
- mixture
- Prior art date
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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
- 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
- C09K8/62—Compositions for forming crevices or fractures
Definitions
- the present invention relates to an oil and gas well proppant in the field of oil field opening, and particularly to a hydrophobic proppant and a preparation method thereof.
- Hydraulic fracturing technology is the main means to improve the yield of low permeability and ultra low permeability oil and gas fields.
- the proppant is a solid particle used in petroleum hydraulic fracturing to support cracks without reclosing the cracks. During the fracturing process, the proppant forms a medium for supporting the fracture, so that the fracture remains supported and provides a conductive passage for the extraction of oil and gas. Therefore, the choice of proppant is essential for oil and gas field stimulation.
- the proppants widely used at home and abroad mainly include natural quartz sand, sintered ceramsite and resin coating proppant.
- Quartz sand generally refers to natural silica sand. It is mainly used for fracturing operations in shallow low-closed pressure wells. Its shape is similar to spherical shape, so it has a certain fluidity. Quartz sand has relatively low strength and poor crushing resistance.
- the sintered ceramsite is mostly obtained by high-temperature calcination (1 380 ⁇ 1420 °C) using bauxite, silicon oxide and other ores. It is mainly used for medium-deep well fracturing process.
- the ceramsite proppant has high energy consumption and limited resources. Low cost, high density and other shortcomings. These two kinds of proppants will have a large amount of debris and fine silt due to the large impact force and closing stress during use. These materials will block the cracks and reduce the conductivity of the cracks, so it is difficult to meet the increasing pressure. Crack process technology requirements.
- the resin film proppant is generally prepared by using an epoxy resin, a phenol resin, a furan resin or a combination of these resins as a binder, and coating the outer layer of quartz sand, ceramsite or walnut shell.
- Different functional resin film proppants can be obtained by modifying the binder.
- Selective oil-permeable water-blocking proppant is a chemical method to introduce a low surface energy hydrophobic group into the resin molecular chain, so that the resin film has better The hydrophobicity thus enhances the water blocking performance of the proppant, resulting in a functional proppant having oil and water barrier properties.
- CN101531893A provides a functional pre-cured resin film proppant which reacts with a resin by adding an organosilicon compound having a reactive group and a hydrophobic group during curing of the resin film to form an organosilicon compound
- the molecule is attached to the resin film cross-linking network. Since the organosilicon compound is a low surface energy substance, the hydrophobic group is coated on the outer surface of the resin so that the solid-liquid phase contact surface is contacted on the outer surface. Angle 0 > 90.
- the hydrophobic structure is formed, so that the outer surface of the resin coating proppant has the characteristics of hydrophobic and lipophilic, the separation effect of oil and water is improved, and the oil recovery cost is reduced; and the good hydrophobicity of the resin film makes the proppant have a better Good water resistance, proppant crushing resistance is improved, and the flow guiding effect is better.
- the technical problem to be solved by the present invention is to solve the problem that the water-repellent effect of the proppant is reduced and the applicable working condition is limited due to the smooth outer surface structure of the resin film of the coating resin proppant in the prior art, and the present invention provides a A hydrophobic proppant is constructed by constructing a micro-nano structure on the surface of a hydrophobic resin.
- the present method adopts the following technical solutions: a hydrophobic proppant, characterized in that: the hydrophobic proppant comprises aggregate particles, and a film-coated resin is cured outside the aggregate particles; the coating resin comprises a hydrophobic resin and nanoparticles uniformly distributed in the hydrophobic resin; the nanoparticles occupying 5 to 60% by weight of the coating resin; the aggregate particles and the coating The weight ratio of the resin is 60-95: 3-30.
- the nanoparticles are one or a mixture of nano silica, nano alumina, nano zinc oxide and nano calcium.
- the nanoparticles have a particle size ranging from 50 to 150 nm.
- the hydrophobic proppant further includes a silane coupling agent, and the ratio by weight of the silane coupling agent to the coating resin is from 0.1 to 1:100.
- the hydrophobic resin is a resin obtained by modifying a resin with an organosilicon compound having a hydrophobic group in a side chain or a fluorine-containing compound having a hydrophobic group in a side chain.
- the organosilicon compound is tricarboxy polydiphenylsiloxane, ⁇ , ⁇ -dihydroxypolydisiloxane, triaminopolydidecylsiloxane, polysiloxane triol, tricarboxyl a mixture of one or more of polydimethoxysiloxane and tricarboxysiloxy-indenylsilsesquioxane;
- the fluorine-containing compound is tetrafluoroethylene, vinylidene fluoride, and chlorotrifluoroethylene or One or a mixture of several of the fluorine-containing carboxylic acids.
- R, 3 Si—Ot ⁇ i—O—fe—Si— ( 2 ) 3 wherein R 1 and R 2 are one or more of an amino group, a hydroxyl group, a carboxyl group, and an alkoxy group, and R 3 and R 4 may be an alkane.
- R 1 and R 2 are one or more of an amino group, a hydroxyl group, a carboxyl group, and an alkoxy group, and R 3 and R 4 may be an alkane.
- n is an integer of 4 to 200.
- the silane coupling agent is ⁇ -aminopropyltriethoxysilane, ⁇ -(2,3-epoxypropoxy)propyltrimethoxysilane, ⁇ -(mercapto acryloxy)propyltri
- methoxysilane ( ⁇ 570) ⁇ - ⁇ -(aminoethyl)- ⁇ -aminopropyltrimethoxysilane
- vinyltris( ⁇ -decyloxyethoxy)silane kind of mixture.
- the invention also provides a method for preparing a hydrophobic proppant, characterized in that it consists of the following steps:
- the coating resin is cured by adding a curing agent.
- the curing agent is paraformaldehyde, hexamethylenetetramine, aliphatic amine, tertiary amine and salt thereof, aromatic amine and modified body thereof, imidazole, polymer prepolymer, peroxide acyl group or peroxidation One or a mixture of several of the esters; the ratio by weight of the curing agent to the coating resin is from 1 to 20:100.
- the step 3) further includes a step
- the lubricant is one or a mixture of polyethylene wax, oxidized polyethylene wax, stearic acid amide or calcium stearate; the weight ratio of the lubricant to the coating resin is 0.5-1.5: 100.
- the stirring condition was stirred at 8000 Torr for 30 min.
- the aggregate particles in the step 2) are heated to 200-220 °C.
- the hydrophobic proppant of the present invention has the following advantages: by constructing a rough surface having a nano structure, that is, a micro-nano structure, on the surface of the existing hydrophobic resin, so that the solid is actually solidified
- the contact surface of the liquid phase is larger than the apparent area of the apparent geometry.
- the shape of the water droplet on the rough surface is close to a spherical shape, and the contact angle ⁇ is increased, so that the water droplet can roll freely on the surface, thereby greatly enhancing the hydrophobicity of the resin film, thus making
- the water repellency of the coating proppant is greatly enhanced, and the contact angle ⁇ of the hydrophobic proppant of the present invention with water is 120. ⁇ 180 ⁇ 180°, the hydrophobic effect is greatly enhanced, and the working conditions are more extensive.
- Aggregate particle quartz sand 200kg curing agent polyfurfural: 0.1kg, Silane coupling agent ⁇ -aminopropyltriethoxysilane: 0.1kg
- Lubricant polyethylene wax 0.05kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles comprise 50% by weight of the coating resin, and the hydrophobic resin accounts for 50% by weight of the coating resin;
- the nanoparticles are selected from nano-silica and have a particle size of 50-150 nm;
- the hydrophobic resin is modified by a tricarboxy polydiphenylsiloxane to obtain a modification method. See Example 1 described in CN101531893A.
- Lubricant oxidized polyethylene wax 0.9kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles occupy 0% by weight of the coating resin, and the hydrophobic resin accounts for 40% by weight of the coating resin;
- the nanoparticles are selected from nano-alumina and have a particle size of 50-150 nm;
- the hydrophobic resin is modified from an epoxy resin by ⁇ , ⁇ -dihydroxypolydimethylsiloxane.
- modification method see Example 1 described in CN101531893A.
- Curing agent aliphatic amine 4kg
- Silane coupling agent ⁇ -(Mercaptoacryloyloxy)propyltrimethoxysilane: 0.06kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles comprise 20% by weight of the coating resin, and the hydrophobic resin accounts for 80% by weight of the coating resin;
- the nanoparticles are selected from nano zinc oxide and have a particle size of 50-150 nm;
- the hydrophobic resin is modified from a furan resin by triaminopolydithiosiloxane, and the modification method thereof is shown in Example 1 of CN101531893A.
- Curing agent aliphatic tertiary amine 2.4kg
- Lubricant calcium stearate 0.3kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles comprise 5% by weight of the coating resin, and the hydrophobic resin accounts for 95% by weight of the coating resin;
- the nanoparticle is selected from nanometer carbonic acid, and has a particle diameter of 50-150 nm;
- the hydrophobic resin is modified from a furan resin by a polysiloxane triol to obtain a modification method. See Example 1 described in CN101531893A.
- Lubricant polyethylene wax 0.2kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles comprise 30% by weight of the coating resin, and the hydrophobic resin accounts for 70% by weight of the coating resin;
- the nano particles are mixed with nano silica and nano alumina, and the particle diameter is 50-150 nm; the hydrophobic resin is modified by phenol case resin modified by tricarboxy polydithiosiloxane. See Example 1 described in CN101531893A.
- Silane coupling agent 0.12kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles comprise 40% by weight of the coating resin, and the hydrophobic resin accounts for 60% by weight of the coating resin;
- the nanoparticle is selected from one or a mixture of nano silica, nano alumina, nanometer oxidation and nanocarbon 4, and the particle diameter is 50-150 nm;
- the hydrophobic resin is modified from tetrafluoroethylene by a phenol resin, and the modification method thereof is shown in Example 1 of CN101531893A.
- the curing agent is polyfurfural, hexamethylenetetramine, aliphatic amine, tertiary amine and salt thereof, aromatic amine and modified body thereof, imidazole, polymer prepolymer, peroxide acyl group or One or a mixture of several of the peroxyesters.
- the silane coupling agent is a silane coupling agent, and ⁇ -aminopropyltriethoxysilane, ⁇ -(2,3-epoxypropoxy)propyltrimethoxysilane, ⁇ -(A) can be selected.
- the lubricant is one or a mixture of polyethylene wax, oxidized polyethylene wax, stearic acid amide or calcium stearate.
- the aggregate particles are ceramsite.
- Curing agent polyfurfural 0.1kg 9 Silane coupling agent ⁇ -aminopropyltriethoxysilane: 0.1kg
- Lubricant polyethylene wax 0.05kg
- the coating resin is a hydrophobic resin, and the hydrophobic resin is modified by a tricarboxy polydiphenylsiloxane to obtain a modification method. See Example 1 of CN101531893A.
- Curing agent aliphatic tertiary amine 2.4kg
- Lubricant calcium stearate 0.3kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles occupy 1% by weight of the coating resin, and the hydrophobic resin accounts for 99% by weight of the coating resin;
- the nanoparticle is selected from nanocarbonate 4, and has a particle diameter of 50-150 nm;
- the hydrophobic resin is modified from ⁇ , ⁇ -dihydroxypolydiphenylsiloxane by a furan resin, and the modification method thereof is shown in Example 1 of CN101531893A.
- Lubricant oxidized polyethylene wax 0.9kg
- the coating resin comprises a hydrophobic resin and nanoparticles, the nanoparticles comprise 70% by weight of the coating resin, and the hydrophobic resin accounts for 30% by weight of the coating resin;
- the nanoparticles are selected from nano-alumina and have a particle size of 50-150 nm;
- the hydrophobic resin is modified by a polysiloxane triol to obtain a modification method. See Example 1 described in CN101531893A.
- the prepared proppant has a contact angle of 120 ° ⁇ ⁇ 180 ° and has strong hydrophobic properties.
- the organosilicon compound tricarboxysiloxy-indenyl silsesquioxane; the fluorine-containing compound may also be selected from one or a mixture of vinylidene fluoride and chlorotrifluoroethylene or a fluorine-containing carboxylic acid.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
- Lubricants (AREA)
- Silicon Compounds (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013530527A JP5917525B2 (ja) | 2010-09-30 | 2011-09-14 | 疎水性プロッパント及びその調製方法 |
EP11827902.5A EP2623579B1 (en) | 2010-09-30 | 2011-09-14 | Hydrophobic proppant and preparation method thereof |
US13/877,243 US9434874B2 (en) | 2010-09-30 | 2011-09-14 | Hydrophobic proppant and preparation method thereof |
CA2821377A CA2821377C (en) | 2010-09-30 | 2011-09-14 | Hydrophobic proppant and preparation method thereof |
RU2013119445/03A RU2559970C2 (ru) | 2010-09-30 | 2011-09-14 | Гидрофобный проппант и способ его получения |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201010500399.1 | 2010-09-30 | ||
CN201010500399.1A CN102443387B (zh) | 2010-09-30 | 2010-09-30 | 一种疏水支撑剂及其制备方法 |
Publications (1)
Publication Number | Publication Date |
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WO2012041004A1 true WO2012041004A1 (zh) | 2012-04-05 |
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ID=45891852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2011/001558 WO2012041004A1 (zh) | 2010-09-30 | 2011-09-14 | 一种疏水支撑剂及其制备方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US9434874B2 (zh) |
EP (1) | EP2623579B1 (zh) |
JP (1) | JP5917525B2 (zh) |
CN (1) | CN102443387B (zh) |
CA (1) | CA2821377C (zh) |
RU (1) | RU2559970C2 (zh) |
WO (1) | WO2012041004A1 (zh) |
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Publication number | Publication date |
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JP2013545828A (ja) | 2013-12-26 |
CN102443387B (zh) | 2016-08-03 |
JP5917525B2 (ja) | 2016-05-18 |
CA2821377C (en) | 2018-06-19 |
EP2623579A1 (en) | 2013-08-07 |
US20130225458A1 (en) | 2013-08-29 |
US9434874B2 (en) | 2016-09-06 |
EP2623579A4 (en) | 2014-06-18 |
CN102443387A (zh) | 2012-05-09 |
CA2821377A1 (en) | 2012-04-05 |
RU2559970C2 (ru) | 2015-08-20 |
RU2013119445A (ru) | 2014-11-10 |
EP2623579B1 (en) | 2021-09-08 |
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