CN114808448A - Modified fiber material, preparation method thereof and plugging agent for oil-based drilling fluid - Google Patents
Modified fiber material, preparation method thereof and plugging agent for oil-based drilling fluid Download PDFInfo
- Publication number
- CN114808448A CN114808448A CN202110083580.5A CN202110083580A CN114808448A CN 114808448 A CN114808448 A CN 114808448A CN 202110083580 A CN202110083580 A CN 202110083580A CN 114808448 A CN114808448 A CN 114808448A
- Authority
- CN
- China
- Prior art keywords
- monomer
- modified
- fiber
- fiber material
- plugging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
- D06M14/08—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of synthetic origin
- D06M14/10—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of synthetic origin of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
- D06M14/02—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of natural origin
- D06M14/04—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of natural origin of vegetal origin, e.g. cellulose or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
- D06M14/08—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of synthetic origin
- D06M14/12—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of synthetic origin of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M14/14—Polyesters
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
- D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
- D06M15/267—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof of unsaturated carboxylic esters having amino or quaternary ammonium groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/285—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/285—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides
- D06M15/29—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides containing a N-methylol group or an etherified N-methylol group; containing a N-aminomethylene group; containing a N-sulfidomethylene group
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/356—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms
- D06M15/3562—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms containing nitrogen
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/32—Polyesters
Abstract
The invention provides a modified fiber material, a preparation method thereof and a plugging agent for an oil-based drilling fluid. The modified fiber material comprises a matrix fiber and a copolymer of an acrylic monomer, an amide monomer, an acrylate monomer and a cationic monomer which are connected to the surface of the matrix fiber through physical coating and/or chemical bonds. Wherein, the matrix fiber is one or more of modified adhesive fiber, waste paper pulp plant fiber and elastic fiber. The modified fiber material has better lipophilicity, so that the modified fiber material has better adaptability and compatibility in the oil-based drilling fluid; secondly, the adsorbent has better adsorption effect and can effectively reside in a stratum pore canal; and thirdly, the high-temperature-resistant material has better high-temperature-resistant performance and can better adapt to the underground high-temperature stratum environment. When the plugging agent is subsequently used as a plugging agent for an oil-based drilling fluid, the plugging performance is better, the plugging size is wider, bridging plugging can be effectively realized, and the plugging requirements on microcracks, microporosities and bedding development strata are met.
Description
Technical Field
The invention relates to the field of oil-based drilling fluid, and particularly relates to a modified fiber material and a preparation method thereof, and a plugging agent for oil-based drilling fluid.
Background
According to the development experience of foreign shale oil and gas reservoirs, the oil-based drilling fluid has good capabilities of inhibiting, lubricating and the like, so that the oil-based drilling fluid is generally adopted for drilling long-horizontal-section shale gas wells at home. The oil-based drilling fluid can solve the hydration problem of shale, but due to the microcrack and bedding development of shale stratum, the drilling fluid is easy to enter the shale along the microcrack, so that the circulating loss of the drilling fluid is large, and the pore pressure of a near well wall zone can be increased, so that the rocks around the well wall are collapsed and fall into blocks until collapse. Therefore, the plugging capability of the oil-based drilling fluid is improved, the drilling fluid is prevented from invading a stratum, a compact plugging layer is formed, the rock strength of a zone close to a well wall is enhanced, and the purposes of stable and safe drilling of the well wall are achieved. Most of the currently used plugging materials are bridge plug type while-drilling leakage-proof materials only with hydrophilic performance, but the bridge plug type while-drilling leakage-proof materials are single in type, poor in adaptability in oil-based drilling fluid and insufficient in particle size matching capability, and cannot meet the high-temperature resistance capability of deep strata.
In summary, the conventional oil-based drilling fluid plugging agent has the following disadvantages: (1) the lipophilicity is poor, the adaptability in the oil-based drilling fluid is poor, and the oil-based drilling fluid cannot be effectively dispersed, so that the plugging strength is low; (2) the conventional plugging agent is difficult to effectively reside in a stratum pore canal, and the plugging strength is low; (3) the temperature resistance is insufficient, and the device cannot adapt to the underground high-temperature formation environment.
Disclosure of Invention
The invention mainly aims to provide a modified fiber material, a preparation method thereof and a plugging agent for an oil-based drilling fluid, and aims to solve the following problems of the conventional plugging agent for the oil-based drilling fluid in the prior art: (1) the lipophilicity is poor, the adaptability in the oil-based drilling fluid is poor, and the oil-based drilling fluid cannot be effectively dispersed, so that the plugging strength is low; (2) the conventional plugging agent is difficult to effectively reside in a stratum pore canal, and the plugging strength is low; (3) the temperature resistance is insufficient, and the device cannot adapt to the underground high-temperature formation environment.
In order to achieve the above object, according to one aspect of the present invention, there is provided a modified fiber material. The modified fiber material comprises matrix fiber and a copolymer of acrylic monomers, amide monomers, acrylate monomers and cationic monomers which are connected to the surface of the matrix fiber through physical coating and/or chemical bonds; wherein, the matrix fiber is one or more of modified adhesive fiber, waste paper pulp fiber and elastic fiber.
Further, the weight ratio of the matrix fiber to the acrylate monomer is (4:3) to (1: 1).
Preferably, the weight ratio of the acrylic monomer, the amide monomer, the acrylate monomer and the cationic monomer is (10-15): 15-20): 3-4.
Further, the length of the matrix fiber is 2-4 mm, and the diameter is 10-20 μm.
Further, the acrylic monomer is acrylic acid and/or methacrylic acid.
Further, the amide monomer is selected from one or more of caprolactam, acrylamide, dimethyl diacrylamidopropanesulfonic acid and N-hydroxymethyl acrylamide.
Further, the acrylate monomer is selected from one or more of butyl acrylate, lauryl acrylate, stearyl acrylate and methyl methacrylate.
Further, the cationic monomer is selected from dimethyldiallylammonium chloride and/or 2- (methacryloyloxy) ethyltrimethylammonium chloride.
Further, the monomers forming the copolymer also include a temperature-resistant monomer.
Preferably, the temperature-resistant monomer is selected from one or more of N-vinyl pyrrolidone, styrene, sodium styrene sulfonate and sodium 4-hydroxybenzene sulfonate.
Preferably, the weight ratio of the temperature-resistant monomer to the fiber material is (1:4) to (2: 5).
According to an aspect of the present invention, there is provided a method for preparing the above-mentioned modified fiber material, comprising the steps of; s1, mixing an acrylic monomer, an amide monomer, an acrylate monomer, a cationic monomer, water and an emulsifier to obtain a pre-emulsion; and S2, adding matrix fibers, an initiator and a cross-linking agent into the pre-emulsion in sequence to carry out emulsion polymerization reaction, thereby obtaining the modified fiber material.
Further, step S1 includes: mixing an acrylic monomer, an amide monomer, a cationic monomer, water and a pH regulator to obtain a mixed solution, wherein the pH of the mixed solution is 6.0-8.0; preferably, the pH regulator is sodium hydroxide or an aqueous solution thereof; and mixing the mixed solution with an acrylate monomer, an optional temperature-resistant monomer and an emulsifier, and emulsifying by a shearing emulsifying machine to obtain a pre-emulsion.
Preferably, the emulsifier is selected from one of MS-1, OP-10 and Span 20.
Further, in step S2, the emulsion polymerization reaction temperature is 70-80 ℃ and the time is 3.5-4.5 h.
Preferably, the initiator is selected from one of ammonium persulfate, potassium persulfate, hydrogen peroxide, dibenzoyl peroxide and azobisisobutyronitrile.
Preferably, the crosslinking agent is one of N, N-methylene bisacrylamide, 4-vinylpyridine and 2-vinylbenzene.
According to one aspect of the invention, the plugging agent for the oil-based drilling fluid is the modified fiber material or the modified fiber material prepared by the preparation method of the modified fiber material.
The modified fiber material prepared by the invention has better lipophilicity, adsorptivity and high temperature resistance, so that the modified fiber material has better adaptability and compatibility in the oil-based drilling fluid, can effectively reside in a stratum pore canal, can better adapt to the underground high-temperature stratum environment, and has better plugging performance when being used as a plugging agent of the oil-based drilling fluid in the follow-up process.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background section, the following problems exist with conventional oil-based drilling fluid plugging agents of the prior art: (1) the lipophilicity is poor, the adaptability in the oil-based drilling fluid is poor, and the oil-based drilling fluid cannot be effectively dispersed, so that the plugging strength is low; (2) the conventional plugging agent is difficult to effectively reside in a stratum pore canal, and the plugging strength is low; (3) the temperature resistance is insufficient, and the device cannot adapt to the underground high-temperature formation environment.
In order to solve the problem, the invention provides a modified fiber material, which comprises a matrix fiber and a copolymer of an acrylic monomer, an amide monomer, an acrylate monomer and a cationic monomer, wherein the copolymer is connected to the surface of the matrix fiber through physical coating and/or chemical bonds. Wherein, the matrix fiber is one or more of modified adhesive fiber, waste paper pulp plant fiber and elastic fiber.
Specifically, the modified adhesive fiber is a polypropylene modified fiber (Shanghai Bangwei municipal engineering Co., Ltd.), the waste paper pulp fiber is a newspaper fiber (Hebei Dan Xuanli mineral products trade Co., Ltd.), and the elastic fiber is a strand-like synthetic polyester fiber (Shanghai Bangwei municipal engineering Co., Ltd.). The present invention modifies these fibers to solve the above problems, and physically or chemically coats the surface of the base fiber with a copolymer of an acrylic monomer, an amide monomer, an acrylate monomer, and a cationic monomer. The modified adhesive fiber, the waste paper pulp fiber and the elastic fiber are linked on the surface of the fiber through chemical bonds by hydroxyl, amino and the like carried on the molecular chain of the fiber, and part of the copolymer is physically coated on the surface of the fiber.
The acrylate monomer, the acrylic monomer and the amide monomer in the copolymer are used as main monomer bodies of the copolymer (the main monomer in the main chain of the polymer is formed), so that the main chain of a carbon-carbon structure in the polymerized copolymer modified fiber material is more favorable for improving the temperature resistance of the material, and the copolymer modified fiber material can better adapt to the underground high-temperature stratum environment when being used as a plugging agent for oil-based drilling fluid in the future. Moreover, the acrylate monomer has oleophylic characteristics, can enhance the lipophilicity of the material, promotes the material to have better oleophylic effect, has better adaptability in the oil-based drilling fluid, promotes the dispersion effect of the material in the oil-based drilling fluid to be better due to the good lipophilicity and adaptability, promotes the compatibility of the material in the oil-based drilling fluid to be better due to the good dispersibility, does not agglomerate or settle after being stored for a long time, and further has higher plugging strength when being used as a plugging agent for the oil-based drilling fluid in the follow-up process. The cationic monomer has adsorbability, and can enhance the adsorption effect of the material, so that the effective residence of the material in a stratum pore canal can be realized, and the plugging strength of the modified fiber material is improved when the modified fiber material is used as a plugging agent for an oil-based drilling fluid in the future. The fiber material is used as a matrix, on one hand, the raw material source is wider, the material can be obtained more easily, and the fiber material has a physical elastic effect and can block micro cracks, micro pores and layer growth in different scale ranges. On the other hand, the matrix fiber material selected by the invention can be coated with the copolymer of acrylic monomers, amide monomers, acrylate monomers and cationic monomers through chemical bonds and/or physics to obtain the modified fiber material with better lipophilicity, adsorbability, high temperature resistance and uniformity of all properties.
In a word, the modified fiber material has better lipophilicity, so that the modified fiber material has better adaptability and compatibility in the oil-based drilling fluid; secondly, the adsorbent has better adsorption effect and can effectively reside in the pore canal of the stratum; and thirdly, the high-temperature-resistant material has better high-temperature-resistant performance and can better adapt to the underground high-temperature stratum environment. When the plugging agent is subsequently used as a plugging agent for an oil-based drilling fluid, the plugging performance is better, the plugging size is wider, bridging plugging can be effectively realized, and the plugging requirements on microcracks, microporosities and bedding development strata are met. And the rock core can be greatly blocked under the conditions of normal temperature and high temperature, so that the blocking effect is better.
Preferably, the weight ratio of the matrix fiber to the acrylate monomer is (4:3) to (5: 3). Within the range, the modified fiber material is promoted to have better lipophilicity, and the oil-based drilling fluid has better adaptability and compatibility. Preferably, the weight ratio of the acrylic monomer, the amide monomer, the acrylate monomer and the cationic monomer is (8-10): 15-20): (3-5). Within this range, better adsorption of the modified fiber material may be promoted, thereby further achieving effective retention of the material in the formation pore canal. Meanwhile, the modified fiber material has better temperature resistance and can better balance the lipophilicity and the adsorbability of the material.
Preferably, the length of the matrix fiber is 2-4 mm, and the diameter is 10-20 μm. On the one hand, the coating effect and the connection effect of the matrix fiber and the polymer can be better promoted, and the performance of the matrix fiber and the performance of each monomer in the polymer can be better balanced, so that the modified fiber material with better lipophilicity, adsorbability and high temperature resistance can be obtained. On the other hand, when the plugging agent is used as a plugging agent in the follow-up process, the plugging performance is better, the plugging size is wider, bridging plugging can be effectively realized, and the plugging requirements on micro cracks, micro pores and a bedding development stratum are met.
For the purpose of further promoting better high temperature resistance of the modified fiber material, the acrylic monomer is acrylic acid and/or methacrylic acid, and the amide monomer is selected from one or more of caprolactam, acrylamide, dimethyl diacrylamidopropanesulfonic acid and N-hydroxymethyl acrylamide.
Based on the aim of further promoting the modified fiber material to have better oleophilicity and high-temperature resistance, the acrylate monomer is selected from one or more of butyl acrylate, lauryl acrylate, stearyl acrylate and methyl methacrylate.
The cationic monomer is selected from dimethyldiallylammonium chloride and/or 2- (methacryloyloxy) ethyltrimethylammonium chloride for the purpose of further promoting better adsorption of the modified fibrous material.
In a preferred embodiment, the monomers forming the copolymer further comprise a temperature resistant monomer selected from one or more of N-vinylpyrrolidone, styrene, sodium styrene sulfonate, sodium 4-hydroxybenzenesulfonate. Based on the method, the temperature resistance of the modified fiber material can be further improved greatly.
The invention provides a preparation method of the modified fiber material, which comprises the following steps; s1, mixing an acrylic monomer, an amide monomer, an acrylate monomer, a cationic monomer, water and an emulsifier to obtain a pre-emulsion; and S2, adding matrix fibers, an initiator and a cross-linking agent into the pre-emulsion in sequence to carry out emulsion polymerization reaction, thereby obtaining the modified fiber material.
The preparation method comprises the steps of mixing an acrylic monomer, an amide monomer, an acrylate monomer, a cationic monomer and an emulsifier to obtain a pre-emulsion, and then sequentially adding a fiber material, an initiator and a cross-linking agent into the pre-emulsion to perform emulsion polymerization reaction to obtain the modified fiber material. By the operation, the matrix fiber, the initiator and the cross-linking agent are added after the raw materials are uniformly and stably mixed, so that the emulsion polymerization reaction can be promoted to be more stable, the acrylic monomer, the amide monomer, the acrylate monomer and the cationic monomer can grow in situ on the surface of the matrix fiber in the emulsion polymerization process, and the matrix fiber with the reactive group on the surface can directly react to form chemical connection in the in-situ polymerization process of the copolymer, so that the copolymer can form better coating on the surface of the matrix fiber, the uniformity of the composition and the size of the coating layer of the modified fiber material can be controlled, and the performances of all aspects of the coating layer are more uniform. And for the reasons stated above, the modified fiber material of the present invention: the oil-based drilling fluid has better lipophilicity, so that the oil-based drilling fluid has better adaptability and compatibility; the adsorbent has better adsorption effect and can effectively reside in the pore canal of the stratum; has better high temperature resistance and can better adapt to the underground high-temperature formation environment. When the plugging agent is used as a plugging agent for an oil-based drilling fluid in the follow-up process, the plugging effect is better.
For the purpose of promoting better emulsification, in a preferred embodiment, step S1 includes: mixing an acrylic monomer, an amide monomer, a cationic monomer, deionized water and a pH regulator to obtain a mixed solution, wherein the pH of the mixed solution is 6.0-8.0, and the pH regulator is 30 wt% of sodium hydroxide. And mixing the mixed solution with an acrylate monomer, a temperature-resistant monomer and an emulsifier, and emulsifying by using a shearing emulsifying machine to obtain a pre-emulsion, wherein the rotating speed of the shearing emulsifying machine is 3000 r/min. Preferably, the emulsifier is selected from one of MS-1, OP-10 and Span80, and the amount of the emulsifier is 5-10% of the weight of the acrylic monomer.
In a preferred embodiment, in step S2, the pre-emulsion is placed in a three-neck flask to be preheated and stirred, when the temperature reaches 55 ℃, the matrix fiber is added, the heating and stirring state is maintained, then the initiator solution (0.1-0.2 g of initiator dissolved in 10-15 mL of deionized water) is added dropwise, after 30min of reaction, the cross-linking agent solution (0.3-0.5 g of cross-linking agent dissolved in 10-15 mL of deionized water) is added dropwise, and the reaction state is maintained for 3-4 h at 70-80 ℃ to obtain the modified fiber material. By such operation, the emulsion polymerization reaction can be further promoted to be more stable, and the performance uniformity of the modified fiber material is better. More preferably, the initiator is selected from one of ammonium persulfate, potassium persulfate, hydrogen peroxide, dibenzoyl peroxide and azobisisobutyronitrile, and the cross-linking agent is selected from one of N, N-methylene bisacrylamide, 4-vinylpyridine and 2-vinylbenzene.
The invention also provides a plugging agent for the oil-based drilling fluid, which is the modified fiber material or the modified fiber material prepared by the preparation method of the modified fiber material.
In addition, the invention also provides application of the modified fiber material as a plugging agent for the oil-based drilling fluid.
Based on the reasons, the modified fiber material disclosed by the invention has better lipophilicity, adsorption effect and high-temperature resistance, so that the modified fiber material is better in adaptability and compatibility in the oil-based drilling fluid, can effectively reside in a stratum pore canal, and can better adapt to the underground high-temperature stratum environment. When the modified fiber material is used as a plugging agent for the oil-based drilling fluid, the plugging performance is better, the plugging size is wider, bridging plugging can be effectively realized, and the plugging requirements on microcracks, microporosities and bedding development strata are met. And the experimental rock core can be greatly blocked under the conditions of normal temperature and high temperature, so that the blocking effect is better.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1
10g of acrylic acid, 5g of caprolactam, 5g of acrylamide and 3g of dimethyldiallylammonium chloride are added to 180mL of deionized water and mixed, and 10mL of 30 wt% sodium hydroxide solution is added to obtain a mixed solution with the pH value of 7.0.
Adding 25g of butyl acrylate, 10g of lauryl acrylate, 3g of N-vinyl pyrrolidone and 12g of emulsifier MS into the mixed solution, and emulsifying by using a shearing emulsifying machine to obtain a pre-emulsion, wherein the rotating speed of the shearing emulsifying machine is 3000 r/min.
Placing the pre-emulsion in a three-neck flask, preheating and stirring, adding 20g of polypropylene modified fiber (purchased from Shanghai Bangwei municipal engineering Co., Ltd.) when the temperature reaches 55 ℃, keeping the heating and stirring state, dropwise adding an initiator solution (0.1g of potassium persulfate dissolved in 2mL of deionized water), reacting for 30min, and then dropwise adding a cross-linking agent solution (0.1g N, N-methylene bisacrylamide dissolved in 2mL of deionized water). Reacting for 4 hours at the temperature of 70 ℃ to obtain the modified fiber material.
Wherein the weight ratio of the fiber material, the acrylate monomer, the cationic monomer, the acrylic monomer, the amide monomer and the temperature-resistant monomer is as follows: 20:35:3:10:10:3.
Example 2
10g of methacrylic acid, 5g of caprolactam, 5g of acrylamide and 4g of 2- (methacryloyloxy) ethyltrimethyl ammonium chloride were added to 180mL of deionized water, mixed, and 10mL of 30 wt% sodium hydroxide solution was added to obtain a mixed solution having a pH of 7.0.
Adding 22g of lauryl acrylate, 10g of octadecyl acrylate, 5g of styrene and 12g of emulsifier MS into the mixed solution, and emulsifying by a shearing emulsifying machine to obtain a pre-emulsion, wherein the rotating speed of the shearing emulsifying machine is 3000 r/min.
Placing the pre-emulsion in a three-neck flask, preheating and stirring, adding 20g of newspaper fiber (purchased from Hebei Dandan warming mineral products trade company, Inc.) when the temperature reaches 55 ℃, keeping the heating and stirring state, dropwise adding an initiator solution (0.1g of potassium persulfate dissolved in 2mL of deionized water), reacting for 30min, and then dropwise adding a cross-linking agent solution (0.1g N, N-methylene bisacrylamide dissolved in 2mL of deionized water). Reacting for 4 hours at the temperature of 70 ℃ to obtain the modified fiber material.
Wherein the weight ratio of the fiber material, the acrylate monomer, the cationic monomer, the acrylic monomer, the amide monomer and the temperature-resistant monomer is as follows: 20:32:4:10:10:5.
Example 3
8g of acrylic acid, 5g of methacrylic acid, 3g of dimethylbisacrylamidopropanesulfonic acid, 3g of N-methylolacrylamide and 4g of 2- (methacryloyloxy) ethyltrimethylammonium chloride were added to 180mL of deionized water, mixed, and added with 13mL of 30 wt% sodium hydroxide solution to obtain a mixed solution having a pH of 7.0.
Adding 14g of octadecyl acrylate, 20g of methyl methacrylate, 3g of sodium styrene sulfonate, 2g of 4-hydroxybenzene sodium sulfonate and 12g of emulsifier MS into the mixed solution, and emulsifying by a shearing emulsifying machine to obtain a pre-emulsion, wherein the rotating speed of the shearing emulsifying machine is 3000 r/min.
Placing the pre-emulsion in a three-neck flask, preheating and stirring, adding 20g of bundle-shaped synthetic polyester fiber (purchased from Shanghai Bangwei municipal engineering Co., Ltd.) when the temperature reaches 55 ℃, keeping the heating and stirring state, dropwise adding an initiator solution (0.1g of potassium persulfate dissolved in 2mL of deionized water), reacting for 30min, and dropwise adding a cross-linking agent solution (0.1g N, N-methylene bisacrylamide dissolved in 2mL of deionized water). Reacting for 4 hours at the temperature of 70 ℃ to obtain the modified fiber material.
Wherein the weight ratio of the fiber material, the acrylate monomer, the cationic monomer, the acrylic monomer, the amide monomer and the temperature-resistant monomer is as follows: 20:34:4:13:6:5.
Comparative example 1
The unmodified base fiber from example 1 was used as a blocking agent.
And (3) performance characterization:
preparing base slurry of the oil-based drilling fluid: adding 400mL of white oil into a goblet, sequentially adding 12g of primary emulsifier HT-MUL, 6g of auxiliary emulsifier HT-WEL and 100mL of 25% calcium chloride aqueous solution under the high-speed stirring state, stirring at a high speed for 20min, adding 8g of organic soil, stirring at a high speed for 20min, adding 12g of calcium oxide, and stirring at a high speed for 30min to obtain the oil-based drilling fluid base slurry.
The modified fiber materials in examples 1 to 3 and the plugging agent in comparative example 1 are added into the base slurry of the oil-based drilling fluid in a mass ratio of 2%, and the formula is shown in the following table 1.
TABLE 1
| Numbering | Formulation of |
| 1 | Oil-based drilling fluid base slurry |
| 2 | Oil-based drilling fluid base mud + 2% modified fiber from example 1 |
| 3 | Oil-based drilling fluid base mud + 2% modified fiber of example 2 |
| 4 | Oil-based drilling fluid base mud + 2% modified fiber example 3 |
| 5 | Oil-based drilling fluid base slurry + 2% plugging agent of comparative example 1 |
1. Compatibility testing
And evaluating the compatibility of the plugging agent in the oil-based drilling fluid according to whether the plugging agent can be well dispersed and suspended in the oil-based drilling fluid and simultaneously does not influence the rheological property of the oil-based drilling fluid and the stability of the oil-based drilling fluid.
The test is carried out according to the national standard GB/T29170 and 2012 laboratory test for oil and gas industry drilling fluid. And (3) respectively aging the materials in the numbers 1 to 5 for 16h at 180 ℃ by using a roller heating furnace, and measuring the high-temperature and normal-temperature rheological parameters (AV apparent viscosity, PV plastic viscosity and YP dynamic shear force), API (American petroleum institute) filtration loss, high-temperature and high-pressure filtration loss and demulsification voltage of the drilling fluid. The rheological property test results are shown in table 2 below, and the fluid loss property test results are shown in table 3 below.
TABLE 2
TABLE 3
2. Characterization of lipophilicity
The method for measuring the three-phase contact angle is adopted. After part of liquid medicine is dried, 10g of the modified fiber materials in the embodiments 1 to 3 and the plugging agent in the comparative example 1 are weighed and made into a sheet by a tablet press under the pressure of 7MPa, a static drop contact angle tester is utilized to record the whole process that deionized water liquid drops reach the sheet, the time when the liquid drops are stably contacted with the sheet is found, and the picture is analyzed by software to calculate the contact angle. The test results are shown in table 4 below:
TABLE 4
| Contact angle | |
| Example 1 | 105° |
| Example 2 | 107° |
| Example 3 | 106° |
| Comparative example 1 | 95° |
3. Determination of occlusion Effect
Materials in numbers 1 to 5 are aged for 16 hours at 180 ℃ by using a roller heating furnace respectively, a core plugging experiment is adopted to determine the plugging effect of the plugging agent developed by the invention at high temperature and normal temperature, an artificial core with the permeability of 1000md is selected to be treated by saturated water, kerosene is used for displacing water, the confining pressure is kept 0.5-1 MPa greater than the pressure provided by a gas cylinder, the drilling fluid is ensured not to flee out from the periphery of the core, the testing temperature is 50 ℃, the pollution pressure is 3.0MPa, and the time is 3 hours. The plugging capability of the plugging agent on the stratum is evaluated by using the forward plugging rate and the reverse plugging rate, and the test result is shown in table 5.
TABLE 5
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the modified fiber material has better lipophilicity, so that the modified fiber material has better adaptability and compatibility in the oil-based drilling fluid; secondly, the adsorbent has better adsorption effect and can effectively reside in the pore canal of the stratum; thirdly, the high temperature resistant performance is better, and the high temperature resistant material can be better suitable for the underground high temperature stratum environment. When the plugging agent is subsequently used as a plugging agent for an oil-based drilling fluid, the plugging performance is better, the plugging size is wider, bridging plugging can be effectively realized, and the plugging requirements on microcracks, microporosities and bedding development strata are met. And the experimental rock core can be greatly blocked under the conditions of normal temperature and high temperature, so that the blocking effect is better.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The modified fiber material is characterized by comprising a matrix fiber and a copolymer of an acrylic monomer, an amide monomer, an acrylate monomer and a cationic monomer, wherein the copolymer is connected to the surface of the matrix fiber through physical coating and/or chemical bonds; wherein the matrix fiber is one or more of modified adhesive fiber, waste paper pulp fiber and elastic fiber.
2. The modified fiber material according to claim 1, wherein the weight ratio of the base fiber to the acrylate monomer is (4:3) to (1: 1);
preferably, the weight ratio of the acrylic monomer, the amide monomer, the acrylate monomer and the cationic monomer is (10-15): 15-20): 3-4.
3. The modified fiber material according to claim 1 or 2, wherein the base fiber has a length of 2 to 4mm and a diameter of 10 to 20 μm.
4. The modified fibrous material according to any of claims 1 to 3, characterized in that the acrylic monomer is acrylic acid and/or methacrylic acid.
5. The modified fibrous material according to any of claims 1 to 4, characterized in that the amide monomers are selected from one or more of caprolactam, acrylamide, dimethyldiacrylamidopropanesulfonic acid, N-methylolacrylamide.
6. The modified fibrous material according to any of claims 1 to 5, characterized in that the acrylate monomers are selected from one or more of butyl acrylate, dodecyl acrylate, octadecyl acrylate, methyl methacrylate.
7. The modified fibrous material according to any of claims 1 to 5, characterized in that the cationic monomer is selected from dimethyldiallylammonium chloride and/or 2- (methacryloyloxy) ethyltrimethylammonium chloride.
8. The modified fibrous material according to any of claims 1 to 5, characterized in that the monomers forming the copolymer further comprise a temperature resistant monomer;
preferably, the temperature-resistant monomer is selected from one or more of N-vinyl pyrrolidone, styrene, sodium styrene sulfonate and sodium 4-hydroxybenzene sulfonate;
preferably, the weight ratio of the temperature-resistant monomer to the fiber material is (1:4) - (2: 5).
9. A method for preparing a modified fibre material according to any one of claims 1 to 8, characterised in that it comprises the steps of;
s1, mixing an acrylic monomer, an amide monomer, an acrylate monomer, a cationic monomer, water and an emulsifier to obtain a pre-emulsion;
and S2, sequentially adding matrix fibers, an initiator and a cross-linking agent into the pre-emulsion to carry out emulsion polymerization reaction, thereby obtaining the modified fiber material.
10. The method for preparing a modified fiber material according to claim 9, wherein the step S1 includes:
mixing the acrylic monomer, the amide monomer, the cationic monomer, the water and a pH regulator to obtain a mixed solution, wherein the pH of the mixed solution is 6.0-8.0; preferably, the pH regulator is sodium hydroxide or an aqueous solution thereof;
mixing the mixed solution with the acrylate monomer, the optional temperature-resistant monomer and the emulsifier, and emulsifying by a shearing emulsifying machine to obtain the pre-emulsion;
preferably, the emulsifier is selected from one of MS-1, OP-10 and Span 20.
11. The method for preparing the modified fiber material according to claim 9, wherein in the step S2, the emulsion polymerization reaction temperature is 70-80 ℃ and the time is 3.5-4.5 h;
preferably, the initiator is selected from one of ammonium persulfate, potassium persulfate, hydrogen peroxide, dibenzoyl peroxide and azobisisobutyronitrile;
preferably, the cross-linking agent is one of N, N-methylene bisacrylamide, 4-vinylpyridine and 2-vinylbenzene.
12. A plugging agent for oil-based drilling fluid, which is the modified fiber material of any one of claims 1 to 8 or the modified fiber material prepared by the preparation method of any one of claims 9 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110083580.5A CN114808448A (en) | 2021-01-21 | 2021-01-21 | Modified fiber material, preparation method thereof and plugging agent for oil-based drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110083580.5A CN114808448A (en) | 2021-01-21 | 2021-01-21 | Modified fiber material, preparation method thereof and plugging agent for oil-based drilling fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114808448A true CN114808448A (en) | 2022-07-29 |
Family
ID=82523583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110083580.5A Pending CN114808448A (en) | 2021-01-21 | 2021-01-21 | Modified fiber material, preparation method thereof and plugging agent for oil-based drilling fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114808448A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4271227A (en) * | 1979-04-26 | 1981-06-02 | Andrews Paper & Chemical Co., Inc. | Transparent fibrous sheets and process for making |
| US20070173414A1 (en) * | 2006-01-09 | 2007-07-26 | Clearwater International, Inc. | Well drilling fluids having clay control properties |
| CN102477288A (en) * | 2010-11-22 | 2012-05-30 | 中国石油大学(北京) | Well drilling and completion fluid for oil-gas reservoir protection |
| CN105368409A (en) * | 2015-11-24 | 2016-03-02 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Composite type leakage plugging agent for oil-based drilling fluid and preparation method thereof |
| CN105441044A (en) * | 2014-09-17 | 2016-03-30 | 中国石油化工股份有限公司 | Leak-stopping agent for oil-base drilling fluid |
| US20180258210A1 (en) * | 2017-03-08 | 2018-09-13 | Istanbul Technical University | Polymerization of 3-methoxthiophene (mot) monomer on poly-(acrylonitrile -co-itaconic acid) matrix and method for nano fiber derivative by method of electro-spinning of produced nano-particulates |
| CN111499790A (en) * | 2020-04-29 | 2020-08-07 | 中国石油大学(华东) | High-temperature-resistant polymer microsphere nano plugging agent for water-based drilling fluid and preparation method thereof |
| CN112194755A (en) * | 2020-10-09 | 2021-01-08 | 中国石油大学(华东) | Preparation method of temperature-sensitive flow type regulator for deepwater water-based drilling fluid |
-
2021
- 2021-01-21 CN CN202110083580.5A patent/CN114808448A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4271227A (en) * | 1979-04-26 | 1981-06-02 | Andrews Paper & Chemical Co., Inc. | Transparent fibrous sheets and process for making |
| US20070173414A1 (en) * | 2006-01-09 | 2007-07-26 | Clearwater International, Inc. | Well drilling fluids having clay control properties |
| CN102477288A (en) * | 2010-11-22 | 2012-05-30 | 中国石油大学(北京) | Well drilling and completion fluid for oil-gas reservoir protection |
| CN105441044A (en) * | 2014-09-17 | 2016-03-30 | 中国石油化工股份有限公司 | Leak-stopping agent for oil-base drilling fluid |
| CN105368409A (en) * | 2015-11-24 | 2016-03-02 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Composite type leakage plugging agent for oil-based drilling fluid and preparation method thereof |
| US20180258210A1 (en) * | 2017-03-08 | 2018-09-13 | Istanbul Technical University | Polymerization of 3-methoxthiophene (mot) monomer on poly-(acrylonitrile -co-itaconic acid) matrix and method for nano fiber derivative by method of electro-spinning of produced nano-particulates |
| CN111499790A (en) * | 2020-04-29 | 2020-08-07 | 中国石油大学(华东) | High-temperature-resistant polymer microsphere nano plugging agent for water-based drilling fluid and preparation method thereof |
| CN112194755A (en) * | 2020-10-09 | 2021-01-08 | 中国石油大学(华东) | Preparation method of temperature-sensitive flow type regulator for deepwater water-based drilling fluid |
Non-Patent Citations (2)
| Title |
|---|
| 周宝义等: "钻井液用多功能阳离子聚合物乳液研制及其作用机制", 中国石油大学学报（自然科学版）, pages 122 - 127 * |
| 张文哲等: ""抗高温纤维强化凝胶颗粒堵漏剂"", 钻井液与完井液, pages 269 - 274 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11072738B2 (en) | Environment-friendly high-temperature resistant water-based drilling fluid plugging anti-sloughing agent, preparation method thereof and the water-based drilling fluid | |
| US4172066A (en) | Cross-linked, water-swellable polymer microgels | |
| US10647902B1 (en) | Temporary plugging agent for drilling fluid and preparation method thereof, and water-based drilling fluid and use thereof | |
| EP1257726B1 (en) | Synthetic crosslinked copolymer solutions and direct injection to subterranean oil and gas formations | |
| US4059552A (en) | Cross-linked water-swellable polymer particles | |
| CN105586025B (en) | High-temperature high-salinity reservoir polymer microsphere disperse system profile control and flooding agent and preparation method and application thereof | |
| CN109777378B (en) | Preparation method of nano emulsion copolymer fluid loss additive for high temperature resistant and salt resistant drilling fluid | |
| CN111875758B (en) | Preparation method of environment-friendly ultra-high temperature resistant filtrate reducer for water-based drilling fluid | |
| CN114181345B (en) | Plugging agent, preparation method and application thereof, and drilling fluid | |
| CN115029926B (en) | Composition and preparation method of fiber grafted expandable resin plugging material and application of fiber grafted expandable resin plugging material in well cementation, leakage prevention and plugging | |
| CN112794946A (en) | Novel hydrophobic association plugging agent and preparation method and application thereof | |
| CN112457454A (en) | High-temperature-resistant organic/inorganic hybrid polymer filtrate reducer and preparation method thereof | |
| CN115057967B (en) | Microgel chemical wall fixing agent for high-temperature-resistant water-based drilling fluid and preparation method and application thereof | |
| KR20210088635A (en) | Self-Reversible Reversed-Phase Polymer Emulsion | |
| CN114736659A (en) | Preparation method of high-temperature high-density water-based drilling fluid filtrate reducer composition | |
| CN114479817B (en) | Polymer microsphere and polymer compound system and preparation method and application thereof | |
| CN114989351A (en) | Low-molecular-weight high-temperature-resistant saturated-salt-resistant filtrate reducer for water-based drilling fluid and preparation method and application thereof | |
| CN115260373B (en) | High Wen Gaogai-resistant flexible plugging agent and preparation method and application thereof | |
| CN114808448A (en) | Modified fiber material, preparation method thereof and plugging agent for oil-based drilling fluid | |
| CN110922952A (en) | High-temperature high-salinity reservoir polymer microsphere profile control and flooding agent and preparation method and application thereof | |
| CN112955522A (en) | Method for enhanced oil recovery by injection of aqueous polymer compositions | |
| CN108003856B (en) | Beaded microsphere profile control water shutoff agent and preparation method thereof | |
| Wang et al. | Hydrophobic association copolymer as viscosifier for high‐temperature high‐pressure anti‐sedimentation performance of water‐based drilling fluid | |
| CN108018032B (en) | Filtrate reducer for oil-based drilling fluid and preparation method thereof | |
| CN114685736A (en) | High-temperature-resistant high-salt-resistant hydrophobic blocking agent and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |