CN109705830B - Magnetic-like slow-swelling expanded particles and preparation method thereof - Google Patents
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Abstract
The invention discloses a similar magnetic slow-swelling expanded particle which comprises 25-75 wt% of S-type expanded particles and 25-75 wt% of N-type expanded particles. The magnetic-like slow-expansion bulk-expanding particles contain S-type and N-type monomers, the temperature resistance and salt resistance of the two monomers are superior to those of common bulk-expanding particles, and the slow-expansion and attractive-aggregation performances can be still achieved under the conditions of high temperature and high salinity.
Description
Technical Field
The invention relates to the field of oil field profile control and flooding agents, in particular to a magnetic-like slow-swelling expanded particle and a preparation method thereof.
Background
In the process of oil exploitation, a large amount of water is generated, the influence of an inhomogeneous stratum on the sweep efficiency of displacement fluids such as polymer flooding, water flooding and the like is gradually serious, and the higher crude oil recovery ratio is required to be achieved. The crack reservoir forms an inefficient flow channel for injected water at the later stage of water injection oilfield development, resulting in over-production of water and rapid reduction in oil production. Through changing the flow direction of rivers passageway, reduce the moisture content, reduce the influence of output water to the environment. The water shutoff and profile control technology is adopted for various oil wells and water wells of the channeling channel type (ultrahigh permeability, crack and large pore) oil reservoir, so that the crude oil recovery rate can be greatly improved. Therefore, crosslinked polymers are one of the reliable techniques for enhanced oil recovery.
The existing commonly used bulk-swelling particles and water-swelling materials are more in number, and the bulk-swelling particles and the water-swelling materials swell when meeting water, and reach the maximum expansion multiple within 24 hours, can be used in a near-well stratum, are not beneficial to deep well profile control and flooding, have a direct relation between the particle size of the bulk-swelling particles and the water plugging effect, and have water-absorbing particles as small as nanometers and large particles as large as millimeters on the market. Each particle size has a corresponding diameter of a water plugging hole, and the effect can be achieved only if the diameter of the hole to be plugged is equal to the diameter of the product to be used. Due to the limitation of knowledge on the stratum and uneven crushing performance in the particle moving process, a lot of gas transport components are increased between blockage and blockage, and the problems of delayed expansion, crushing resistance, elasticity and pressure resistance of the particles are increased.
Disclosure of Invention
In view of the above disadvantages, the present invention aims to provide a bulk expanded particle which can delay the expansion and has crushing resistance and certain elasticity and compression resistance. The product is formed by mixing two polymers, a large amount of hydrophobic monomers and nonionic substances are introduced into the polymers, and required inorganic substances are added, so that the ionic strength of the polymers is reduced, and the water absorption swelling time is delayed; dividing the monomers which are mutually attracted into S type and N type, changing different contents of the S type monomers and the N type monomers, preparing different bulked particles, and controlling the required particle size, wherein in the synthesis process, the two types of bulked particles are respectively prepared, and the S type bulked particles contain the S monomers with different proportions; n-type bulked particles containing N monomers in different proportions; when the product is injected into the stratum under the action of external force, the particles can be combined together again after being crushed, along with the movement of the particles, the particles can be freely separated (when external pressure and space limitation exist) according to the diameter of holes in the stratum, and can be freely combined together to form a gathering shape in a large space or without the external pressure. The two bulked particles synthesized by S-type monomers and N-type monomers can be completely gathered together by attraction force within a certain particle size range after absorbing water to form a bulk. Under the action of external force, they can be separated again, and this phenomenon is similar to mutual attraction and repulsion between magnets, so that it is named as magnetic-like slow-swelling expanded particles.
The technical scheme of the invention is summarized as follows:
the magnetic slow-swelling bulk-expanding particles comprise 25-75 wt% of S-type bulk-expanding particles and 25-75 wt% of N-type bulk-expanding particles.
Preferably, the magnetic slow-swelling expanded particles comprise 10-15 wt% of acrylamide monomers, 3-5 wt% of S-type functional monomers, 5-10 wt% of 2-hydroxyethyl acrylate, 5-10 wt% of methyl methacrylate, 5-10 wt% of nonionic substances, 3-10 wt% of inorganic substances, 0.1-0.5 wt% of cross-linking agents and 20-55 wt% of deionized water.
Preferably, the magnetic slow-swelling expanded particle comprises 10-15 wt% of acrylamide monomer, 3-5 wt% of N-type functional monomer, 5-10 wt% of 2-hydroxyethyl acrylate, 5-10 wt% of methyl methacrylate, 5-10 wt% of nonionic substance, 3-10 wt% of inorganic substance, 0.1-0.5 wt% of cross-linking agent and 20-55 wt% of deionized water.
Preferably, the magnetic slow-swelling expanded particles are prepared from one or more of sodium acrylate, 2-acrylamide-2-methyl sodium propyl sulfonate, N-vinyl pyrrolidone, sodium styrene sulfonate and maleimide.
Preferably, the magnetic slow-swelling expanded particle is a magnetic slow-swelling expanded particle, wherein the N-type functional monomer is one or more selected from methacryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and acryloxytrimethyl ammonium chloride.
Preferably, the magnetic slow swelling and expanding particles are prepared from one or more of guar gum, starch and nonionic substances.
Preferably, the magnetic slow-swelling expanded particles are prepared by mixing inorganic substances with activated carbon, carbon fibers and talcum powder, and then performing magnetic separation on the mixture.
Preferably, the magnetic slow-swelling body-expanding particles are prepared by mixing the cross-linking agent with the magnetic slow-swelling body-expanding particles, wherein the cross-linking agent is selected from one or a combination of N, N methylene acrylamide and divinyl benzene.
A preparation method of the magnetic-like slow-swelling expanded particles comprises the following steps:
a) preparation of the S-type bulking particles
(1) Weighing raw materials according to a weight ratio, adding deionized water into a first dissolving kettle, sequentially adding acrylamide, an S-type functional monomer, 2-hydroxyethyl acrylate, methyl methacrylate, a nonionic substance, an inorganic substance and a cross-linking agent, stirring and dissolving to obtain a first mixed solution;
(2) adjusting the pH value of the first mixed solution to 5.5-6.5, controlling the temperature to be 25-27 ℃, then adding the first mixed solution into a reaction kettle, sequentially adding 0.1-1.0 wt% of catalyst V50, 0.3-1.0 wt% of potassium persulfate and 0.5-1.5 wt% of sodium bisulfite under the protection of nitrogen, filling nitrogen into the reaction kettle, mixing until the system becomes viscous, and stopping blowing the nitrogen to obtain a second mixed solution;
(3) preserving the temperature of the second mixed solution at 85-95 ℃ for 5 hours to obtain a first colloid, and granulating, drying and crushing the first colloid to obtain S-shaped expanded particles;
b) preparation of the N-type bulk expanded particle
Weighing raw materials according to a weight ratio, adding deionized water into a second dissolving kettle, sequentially adding acrylamide, an N-type functional monomer, 2-hydroxyethyl acrylate, methyl methacrylate, a nonionic substance, an inorganic substance and a cross-linking agent, stirring and dissolving to obtain a third mixed solution;
(II) adjusting the pH value of the third mixed solution to 5.5-6.5, controlling the temperature to be 20-25 ℃, then adding the third mixed solution into a reaction kettle, sequentially adding 0.5-1.5 wt% of catalyst V50, 0.5-1.0 wt% of potassium persulfate and 0.5-1.5 wt% of sodium bisulfite under the protection of nitrogen, filling nitrogen into the reaction kettle, mixing until the system becomes viscous, and stopping blowing the nitrogen to obtain a fourth mixed solution;
(III) preserving the temperature of the fourth mixed solution at 85-95 ℃ for 5 hours to obtain a second colloid, and granulating, drying and crushing the second colloid to obtain N-type expanded particles;
c) preparation of the magnetic slow-swelling expanded particles
Mixing and stirring the S-type expanded particles prepared in the step a) and the N-type expanded particles prepared in the step b) according to the proportion for 20 minutes to obtain the similar magnetic slow expanded particles.
Preferably, the preparation method of the similar magnetic slow swelling particles comprises the step of preparing N-type swelling particles and S-type swelling particles with the particle size of 60-150 meshes.
The invention has the beneficial effects that:
(1) the magnetic-like slow-expansion bulk-expanding particles contain S-type and N-type monomers, the temperature resistance and salt resistance of the two monomers are superior to those of common bulk-expanding particles, and the slow-expansion and attractive-aggregation performances can be still achieved under the conditions of high temperature and high salinity.
(2) The magnetic-like slow-swelling bulk swelling particles are prepared by an aqueous solution redox catalytic polymerization method, and a nonionic substance is introduced while the ionic strength of the product is reduced, so that the polymer has obvious slow-swelling performance and sufficient flexibility, and can meet the profile control requirement of a deep well stratum; by introducing inorganic matters, the pressure resistance of the product is greatly enhanced.
(3) The N/S forms are dispersed after absorbing water respectively, however, if the N and S forms an aggregation state after being mixed, the attraction between the N form and the S form is shown, namely, the aggregation state can exist stably under the action of external force, and when the binding force exceeds a critical value, the N/S forms can be dispersed again.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
The invention discloses a similar magnetic slow-swelling expanded particle which comprises 25-75 wt% of S-type expanded particles and 25-75 wt% of N-type expanded particles.
As another embodiment of the present disclosure, the S-type expanded particles include 10 to 15wt% of acrylamide monomer, 3 to 5wt% of S-type functional monomer, 5 to 10wt% of 2-hydroxyethyl acrylate, 5 to 10wt% of methyl methacrylate, 5 to 10wt% of nonionic substance, 3 to 10wt% of inorganic substance, 0.1 to 0.5wt% of cross-linking agent, and 20 to 55wt% of deionized water.
As another embodiment of the present disclosure, the N-type expanded particles include 10 to 15wt% of acrylamide monomer, 3 to 5wt% of N-type functional monomer, 5 to 10wt% of 2-hydroxyethyl acrylate, 5 to 10wt% of methyl methacrylate, 5 to 10wt% of nonionic substance, 3 to 10wt% of inorganic substance, 0.1 to 0.5wt% of cross-linking agent, and 20 to 55wt% of deionized water.
As another embodiment of the present disclosure, the S-type functional monomer is one or more selected from sodium acrylate, sodium 2-acrylamido-2-methylpropanesulfonate, N-vinylpyrrolidone, sodium styrenesulfonate, and maleimide.
As another embodiment of the present application, the N-type functional monomer is one or more selected from methacryloyloxyethyl trimethyl ammonium chloride, dimethyldiallyl ammonium chloride, and acryloxytrimethyl ammonium chloride.
As another embodiment of the present disclosure, the nonionic material is selected from one of guar gum, starch, or a combination thereof. By adding the nonionic substance, the polymer has obvious slow swelling performance and enough flexibility, and can meet the profile control requirement of deep well formations.
As another embodiment of the present disclosure, the inorganic substance is selected from one or more of activated carbon, carbon fiber, and talc.
As another embodiment of this disclosure, the crosslinking agent is selected from N, N methylene acrylamide, divinylbenzene, or a combination thereof.
A preparation method of the magnetic-like slow-swelling expanded particles comprises the following steps:
a) preparation of S-type bulking particles
(1) Weighing raw materials according to a weight ratio, adding deionized water into a first dissolving kettle, sequentially adding acrylamide, an S-type functional monomer, 2-hydroxyethyl acrylate, methyl methacrylate, a nonionic substance, an inorganic substance and a cross-linking agent, stirring and dissolving to obtain a first mixed solution;
(2) adjusting the pH value of the first mixed solution to 5.5-6.5, controlling the temperature to be 25-27 ℃, then adding the first mixed solution into a reaction kettle, sequentially adding 0.1-1.0 wt% of catalyst V50, 0.3-1.0 wt% of potassium persulfate and 0.5-1.5 wt% of sodium bisulfite under the protection of nitrogen, filling nitrogen into the reaction kettle, mixing until the system becomes viscous, and stopping blowing the nitrogen to obtain a second mixed solution;
(3) preserving the temperature of the second mixed solution at 85-95 ℃ for 5 hours to obtain a first colloid, and granulating, drying and crushing the first colloid to obtain S-shaped expanded particles;
b) preparation of N-type bulking particles
Weighing raw materials according to a weight ratio, adding deionized water into a second dissolving kettle, sequentially adding acrylamide, an N-type functional monomer, 2-hydroxyethyl acrylate, methyl methacrylate, a nonionic substance, an inorganic substance and a cross-linking agent, stirring and dissolving to obtain a third mixed solution;
(II) adjusting the pH value of the third mixed solution to 5.5-6.5, controlling the temperature to be 20-25 ℃, then adding the third mixed solution into a reaction kettle, sequentially adding 0.5-1.5 wt% of catalyst V50, 0.5-1.0 wt% of potassium persulfate and 0.5-1.5 wt% of sodium bisulfite under the protection of nitrogen, filling nitrogen into the reaction kettle, mixing until the system becomes viscous, and stopping blowing the nitrogen to obtain a fourth mixed solution;
(III) preserving the temperature of the fourth mixed solution at 85-95 ℃ for 5 hours to obtain a second colloid, and granulating, drying and crushing the second colloid to obtain N-type expanded particles;
c) preparation of magnetic-like slow-swelling expanded particles
Mixing and stirring the S-type expanded particles prepared in the step a) and the N-type expanded particles prepared in the step b) according to the proportion for 20 minutes to obtain the similar magnetic slow expanded particles.
As another embodiment of the present application, the particle diameters of the N-type bulk particles and the S-type bulk particles are 60 to 150 meshes.
Specific examples are listed below:
example 1:
synthesis of S-type expanded particles: weighing the raw materials according to the weight ratio, wherein the raw materials are as follows: 10wt% of acrylamide monomer, 3 wt% of sodium styrene sulfonate, 10wt% of 2-hydroxyethyl acrylate, 10wt% of methyl methacrylate, 10wt% of starch, 10wt% of talcum powder, 0.5wt% of N, N methylene acrylamide and 46.5 wt% of deionized water. At room temperature, adding deionized water in the formula in a dissolving kettle with a stirring device, and slowly adding acrylamide, sodium styrene sulfonate, 2-hydroxyethyl acrylate, methyl methacrylate, starch, talcum powder and N, N methylene acrylamide in turn under stirring for fully dissolving; adjusting the pH value of the dissolving solution to 5.5; adjusting the temperature of the dissolving solution to 25 ℃; transferring all the dissolved solution into a reaction kettle, and blowing nitrogen into the liquid in the reaction kettle for 15 minutes; adding catalyst V50(1.0 wt%), potassium persulfate (1.0 wt%) and sodium bisulfite (1.5 wt%) in sequence under the protection of nitrogen; after the catalyst is added, continuously blowing nitrogen gas for mixing until the system becomes viscous, stopping blowing the nitrogen gas, sealing the reactor, keeping the temperature for 5 hours after the temperature is raised to 85 ℃ under the condition of heat preservation and sealing; and granulating, drying and crushing the polymerized colloid into a finished product of 150-mesh granules to obtain the S-shaped expanded granules.
Synthesis of N-type expanded particles: weighing the raw materials according to the weight ratio, wherein the raw materials are as follows: 10wt% of acrylamide monomer, 5wt% of N-type functional monomer dimethyl diallyl ammonium chloride, 10wt% of acrylic acid-2-hydroxyethyl, 10wt% of methyl methacrylate, 10wt% of starch, 10wt% of carbon fiber, 0.5wt% of cross-linking agent and 44.5 wt% of deionized water, wherein deionized water with the amount in the formula is added into a dissolving kettle provided with a stirring device at room temperature, and acrylamide, dimethyl diallyl ammonium chloride, acrylic acid-2-hydroxyethyl, methyl methacrylate, starch, carbon fiber and N, N-methylene acrylamide are sequentially and slowly added under stirring to be fully dissolved; adjusting the pH value of the dissolving solution to 5.5; adjusting the temperature of the dissolving solution to 20 ℃; transferring all the dissolved solution into a reaction kettle, and blowing nitrogen into the liquid in the reaction kettle for 15 minutes; adding catalyst V50(1.5 wt%), potassium persulfate (1.0 wt%) and sodium bisulfite (1.5 wt%) in sequence under the protection of nitrogen; after the catalyst is added, continuously blowing nitrogen gas for mixing until the system becomes viscous, stopping blowing the nitrogen gas, sealing the reactor, keeping the temperature for 5 hours after the temperature is raised to 85 ℃ under the condition of heat preservation and sealing; and granulating, drying and crushing the polymerized colloid into a finished product of 150-mesh granules. Thus obtaining the N-type expanded particles.
Synthesizing the magnetic-like slow swelling expanded particles: weighing raw materials according to the weight ratio, wherein the mixture ratio of the raw materials is that 50 percent of S-shaped bulk expanded particles and 50 percent of N-shaped bulk expanded particles are mixed and stirred in a storage bin for 20 minutes to obtain the similar magnetic slow bulk expanded particles with the number of TT 990.
Example 2:
synthesis of S-type expanded particles: weighing the raw materials according to the weight ratio, wherein the raw materials are as follows: 10wt% of acrylamide monomer, 3 wt% of sodium styrene sulfonate, 10wt% of 2-hydroxyethyl acrylate, 10wt% of methyl methacrylate, 10wt% of starch, 10wt% of talcum powder, 0.5wt% of divinylbenzene and 46.5 wt% of deionized water. At room temperature, adding deionized water in the formula in a dissolving kettle with a stirring device, and slowly adding acrylamide, sodium styrene sulfonate, 2-hydroxyethyl acrylate, methyl methacrylate, starch, talcum powder and divinylbenzene in turn under stirring for stirring and fully dissolving; adjusting the pH value of the dissolving solution to 6; adjusting the temperature of the dissolving solution to 26 ℃; transferring all the dissolved solution into a reaction kettle, and blowing nitrogen into the liquid in the reaction kettle for 15 minutes; adding catalyst V50(1.0 wt%), potassium persulfate (1.0 wt%) and sodium bisulfite (1.5 wt%) in sequence under the protection of nitrogen; after the catalyst is added, continuously blowing nitrogen gas for mixing until the system becomes viscous, stopping blowing the nitrogen gas, sealing the reactor, keeping the temperature for 5 hours after the temperature is raised to 90 ℃ under the condition of heat preservation and sealing; and granulating, drying and crushing the polymerized colloid into a finished product of 150-mesh granules. Thus, S-shaped expanded particles were obtained.
Synthesis of N-type expanded particles: weighing the raw materials according to the weight ratio, wherein the raw materials are as follows: 10wt% of acrylamide monomer, 5wt% of dimethyl diallyl ammonium chloride, 10wt% of 2-hydroxyethyl acrylate, 10wt% of methyl methacrylate, 10wt% of starch, 10wt% of carbon fiber, 0.5wt% of divinylbenzene and 44.5 wt% of deionized water, wherein deionized water with the amount in the formula is added into a dissolving kettle provided with a stirring device at room temperature, and the acrylamide, the dimethyl diallyl ammonium chloride, 10wt% of 2-hydroxyethyl acrylate, the methyl methacrylate, the starch, the carbon fiber and the divinylbenzene are slowly added in turn under stirring and are stirred for full dissolution; adjusting the pH value of the dissolving solution to 6; adjusting the temperature of the dissolving solution to 22 ℃; transferring all the dissolved solution into a reaction kettle, and blowing nitrogen into the liquid in the reaction kettle for 15 minutes; adding catalyst V50(1.5 wt%), potassium persulfate (1.0 wt%) and sodium bisulfite (1.5 wt%) in sequence under the protection of nitrogen; after the catalyst is added, continuously blowing nitrogen gas for mixing until the system becomes viscous, stopping blowing the nitrogen gas, sealing the reactor, keeping the temperature for 5 hours after the temperature is raised to 90 ℃ under the condition of heat preservation and sealing; and granulating, drying and crushing the polymerized colloid into a finished product of 150-mesh granules. Thus obtaining the N-type expanded particles.
Synthesizing the magnetic-like slow swelling expanded particles: weighing raw materials according to the weight ratio, wherein the mixture ratio of the raw materials is that 25 percent of S-shaped bulk expanded particles and 75 percent of N-shaped bulk expanded particles are mixed and stirred in a storage bin for 20 minutes to obtain the similar magnetic slow bulk expanded particles with the serial number of TT 991.
Example 3:
synthesis of S-type expanded particles: weighing the raw materials according to the weight ratio, wherein the raw materials are as follows: 10wt% of acrylamide monomer, 3 wt% of sodium styrene sulfonate, 10wt% of 2-hydroxyethyl acrylate, 10wt% of methyl methacrylate, 10wt% of starch, 10wt% of talcum powder, 0.3 wt% of N, N methylene acrylamide, 0.2 wt% of divinylbenzene and 46.5 wt% of deionized water. At room temperature, adding deionized water in the formula in an amount of the formula into a dissolving kettle provided with a stirring device, slowly adding acrylamide, sodium styrene sulfonate, 2-hydroxyethyl acrylate, methyl methacrylate, starch, talcum powder, N methylene acrylamide and divinylbenzene in turn under stirring, and stirring for full dissolution; adjusting the pH value of the dissolving solution to 5.5-6.5; adjusting the temperature of the dissolving solution to 27 ℃; transferring all the dissolved solution into a reaction kettle, and blowing nitrogen into the liquid in the reaction kettle for 15 minutes; adding catalyst V50(1.0 wt%), potassium persulfate (1.0 wt%) and sodium bisulfite (1.5 wt%) in sequence under the protection of nitrogen; after the catalyst is added, continuously blowing nitrogen gas for mixing until the system becomes viscous, stopping blowing the nitrogen gas, sealing the reactor, keeping the temperature for 5 hours after the temperature is raised to 95 ℃ under the condition of heat preservation and sealing; and granulating, drying and crushing the polymerized colloid into a finished product of 150-mesh granules. Thus, S-shaped expanded particles were obtained.
Synthesis of N-type expanded particles: weighing the raw materials according to the weight ratio, wherein the raw materials are as follows: 10wt% of acrylamide monomer, 5wt% of dimethyl diallyl ammonium chloride, 10wt% of 2-hydroxyethyl acrylate, 10wt% of methyl methacrylate, 10wt% of starch, 10wt% of carbon fiber, 0.3 wt% of N, N-methylene acrylamide, 0.2 wt% of divinylbenzene and 44.5 wt% of deionized water, wherein the deionized water with the amount in the formula is added into a dissolving kettle provided with a stirring device at room temperature, the acrylamide, the dimethyl diallyl ammonium chloride, the 2-hydroxyethyl acrylate, the methyl methacrylate, the starch, the carbon fiber, the N, N-methylene acrylamide and the divinylbenzene are sequentially and slowly added under stirring, and are fully dissolved under stirring; adjusting the pH value of the dissolving solution to 6.5; adjusting the temperature of the dissolving solution to 25 ℃; transferring all the dissolved solution into a reaction kettle, and blowing nitrogen into the liquid in the reaction kettle for 15 minutes; adding catalyst V50(1.5 wt%), potassium persulfate (1.0 wt%) and sodium bisulfite (1.5 wt%) in sequence under the protection of nitrogen; after the catalyst is added, continuously blowing nitrogen gas for mixing until the system becomes viscous, stopping blowing the nitrogen gas, sealing the reactor, keeping the temperature for 5 hours after the temperature is raised to 95 ℃ under the condition of heat preservation and sealing; and granulating, drying and crushing the polymerized colloid into a finished product of 150-mesh granules. Thus obtaining the N-type expanded particles.
Synthesizing the magnetic-like slow swelling expanded particles: weighing raw materials according to the weight ratio, wherein the mixture ratio of the raw materials is 75 percent of S-shaped bulk expanded particles and 25 percent of N-shaped bulk expanded particles, and mixing and stirring the raw materials in a storage bin for 20 minutes to obtain the similar magnetic slow-expansion bulk expanded particles with the serial number of TT 992.
The data of experimental comparison between the similar magnetic slow swelling particles of examples 1 to 3 and the commercially available swelling particles are as follows:
compared with the prior art, the performance of the similar magnetic slow-swelling volume-expanding particle is superior to that of the commercially available volume-expanding particle.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (4)
1. The magnetic-like slow-swelling expanded particles are characterized by comprising 25-75 wt% of S-type expanded particles and 25-75 wt% of N-type expanded particles;
the S-type bulk expanded particles comprise 10-15 wt% of acrylamide monomers, 3-5 wt% of S-type functional monomers, 5-10 wt% of 2-hydroxyethyl acrylate, 5-10 wt% of methyl methacrylate, 5-10 wt% of nonionic substances, 3-10 wt% of inorganic substances, 0.1-0.5 wt% of cross-linking agents and 20-55 wt% of deionized water;
the N-type bulk expanded particles comprise 10-15 wt% of acrylamide monomers, 3-5 wt% of N-type functional monomers, 5-10 wt% of 2-hydroxyethyl acrylate, 5-10 wt% of methyl methacrylate, 5-10 wt% of nonionic substances, 3-10 wt% of inorganic substances, 0.1-0.5 wt% of cross-linking agents and 20-55 wt% of deionized water;
the S-type functional monomer is selected from one or more of sodium acrylate, 2-acrylamide-2-methyl sodium propane sulfonate and sodium styrene sulfonate;
the N-type functional monomer is selected from one or more of methacryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and acryloyloxy trimethyl ammonium chloride;
the nonionic substance is selected from one or the combination of guar gum and starch;
the inorganic matter is selected from one or more of activated carbon, carbon fiber and talcum powder.
2. The magnetic slow swelling volume expansion particles as claimed in claim 1, wherein the cross-linking agent is selected from one of N, N methylene acrylamide, divinyl benzene or their combination.
3. The method for preparing the magnetic slow swelling and expanding particles as claimed in any one of claims 1 to 2, characterized by comprising the following steps:
a) preparation of the S-type bulking particles
(1) Weighing raw materials according to a weight ratio, adding deionized water into a first dissolving kettle, sequentially adding acrylamide, an S-type functional monomer, 2-hydroxyethyl acrylate, methyl methacrylate, a nonionic substance, an inorganic substance and a cross-linking agent, stirring and dissolving to obtain a first mixed solution;
(2) adjusting the pH value of the first mixed solution to 5.5-6.5, controlling the temperature to be 25-27 ℃, then adding the first mixed solution into a reaction kettle, sequentially adding 0.1-1.0 wt% of catalyst V50, 0.3-1.0 wt% of potassium persulfate and 0.5-1.5 wt% of sodium bisulfite under the protection of nitrogen, filling nitrogen into the reaction kettle, mixing until the system becomes viscous, and stopping blowing the nitrogen to obtain a second mixed solution;
(3) preserving the temperature of the second mixed solution at 85-95 ℃ for 5 hours to obtain a first colloid, and granulating, drying and crushing the first colloid to obtain S-shaped expanded particles;
b) preparation of the N-type bulk expanded particle
Weighing raw materials according to a weight ratio, adding deionized water into a second dissolving kettle, sequentially adding acrylamide, an N-type functional monomer, 2-hydroxyethyl acrylate, methyl methacrylate, a nonionic substance, an inorganic substance and a cross-linking agent, stirring and dissolving to obtain a third mixed solution;
(II) adjusting the pH value of the third mixed solution to 5.5-6.5, controlling the temperature to be 20-25 ℃, then adding the third mixed solution into a reaction kettle, sequentially adding 0.5-1.5 wt% of catalyst V50, 0.5-1.0 wt% of potassium persulfate and 0.5-1.5 wt% of sodium bisulfite under the protection of nitrogen, filling nitrogen into the reaction kettle, mixing until the system becomes viscous, and stopping blowing the nitrogen to obtain a fourth mixed solution;
(III) preserving the temperature of the fourth mixed solution at 85-95 ℃ for 5 hours to obtain a second colloid, and granulating, drying and crushing the second colloid to obtain N-type expanded particles;
c) preparation of the magnetic slow-swelling expanded particles
Mixing and stirring the S-type expanded particles prepared in the step a) and the N-type expanded particles prepared in the step b) according to the proportion for 20 minutes to obtain the similar magnetic slow expanded particles.
4. The method for preparing the magnetic slow swelling and expanding particles according to claim 3, wherein the particle diameters of the N-type swelling particles and the S-type swelling particles are 60-150 meshes.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369254A (en) * | 2008-12-18 | 2012-03-07 | 巴斯夫欧洲公司 | Method for blocking subterranean formations |
| CN107868379A (en) * | 2016-09-26 | 2018-04-03 | 中国石油化工股份有限公司 | Profile control RPP acid amides microballoon and preparation method thereof |
| CN109111904A (en) * | 2018-07-27 | 2019-01-01 | 燕山大学 | A kind of different charged polymers nanosphere profile control agent and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4503912A (en) * | 1983-06-13 | 1985-03-12 | Marathon Oil Company | Process for conformance control using a polymer flocculate |
| US20070204989A1 (en) * | 2006-02-28 | 2007-09-06 | Hongxin Tang | Preformed particle gel for conformance control in an oil reservoir |
| CN105567189B (en) * | 2014-10-17 | 2019-03-29 | 中国石油化工股份有限公司 | A kind of lotion sealing agent and preparation method thereof |
| CN106749990B (en) * | 2016-12-02 | 2019-02-22 | 兰州理工大学 | A kind of magnetic coupling gel micro-ball and preparation method thereof |
| CN106883357B (en) * | 2017-03-16 | 2019-01-18 | 东营方立化工有限公司 | A kind of pre-crosslinked gel delays swollen microballoon profile control agent and its preparation method and application |
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|---|---|---|---|---|
| CN102369254A (en) * | 2008-12-18 | 2012-03-07 | 巴斯夫欧洲公司 | Method for blocking subterranean formations |
| CN107868379A (en) * | 2016-09-26 | 2018-04-03 | 中国石油化工股份有限公司 | Profile control RPP acid amides microballoon and preparation method thereof |
| CN109111904A (en) * | 2018-07-27 | 2019-01-01 | 燕山大学 | A kind of different charged polymers nanosphere profile control agent and preparation method thereof |
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