CN115417944B - Anti-swelling fracturing emulsion capable of being added with polymer on line and preparation method thereof - Google Patents
Anti-swelling fracturing emulsion capable of being added with polymer on line and preparation method thereof Download PDFInfo
- Publication number
- CN115417944B CN115417944B CN202211069593.8A CN202211069593A CN115417944B CN 115417944 B CN115417944 B CN 115417944B CN 202211069593 A CN202211069593 A CN 202211069593A CN 115417944 B CN115417944 B CN 115417944B
- Authority
- CN
- China
- Prior art keywords
- fracturing
- emulsion
- swelling
- oil phase
- added
- 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.)
- Active
Links
- 239000000839 emulsion Substances 0.000 title claims abstract description 46
- 230000002579 anti-swelling effect Effects 0.000 title claims abstract description 38
- 229920000642 polymer Polymers 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000012153 distilled water Substances 0.000 claims abstract description 18
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 14
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 8
- 239000000178 monomer Substances 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- 230000001590 oxidative effect Effects 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 5
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical group CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 claims description 15
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 12
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 12
- 229920000053 polysorbate 80 Polymers 0.000 claims description 12
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical group [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 11
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 11
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 8
- 239000006185 dispersion Substances 0.000 abstract description 5
- 230000005012 migration Effects 0.000 abstract description 5
- 238000013508 migration Methods 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 4
- 239000004927 clay Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 48
- 239000012530 fluid Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000005303 weighing Methods 0.000 description 6
- 239000008346 aqueous phase Substances 0.000 description 5
- 150000001768 cations Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005956 quaternization reaction Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 239000002734 clay mineral Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001767 cationic compounds Chemical class 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- 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
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
-
- 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
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
Abstract
The application discloses an anti-swelling fracturing emulsion capable of being added with polymers on line and a preparation method thereof. The preparation method comprises the following steps of dissolving tributyl amine and dimethyl carbonate serving as oil phase substances in white oil, adding a composite emulsifier, and stirring uniformly to form an oil phase. Dissolving acrylamide and acrylic acid as polymer monomers in distilled water, adding oxidant, and stirring to form water phase. Mixing the water phase and the oil phase, regulating the pH value, slowly adding a reducing agent at low temperature to initiate reaction, and continuing the reaction for a certain time after the completion of the reaction to obtain a target product. The fracturing emulsion prevents the pollution to the reservoir caused by the expansion, dispersion and migration of clay in the reservoir due to well entering liquid in the construction process. The fracturing emulsion can be directly used by being mixed with other formula aqueous solutions on an implementation site, and a polymer dissolving step in a fracturing process is not needed.
Description
Technical Field
The application belongs to the technical field of oilfield fracturing yield increase, and particularly relates to a fracturing emulsion which is anti-swelling and can be added with polymers on line and a preparation method thereof.
Background
Fracturing is the most important yield increasing measure for the current oil and gas field development, the fracturing fluid can directly influence success and failure of construction and transformation effect, full extension of cracks and complex crack communication can be realized, and the aims of maximally improving the complexity and transformation volume of the cracks are achieved. The fracturing fluid is generally prepared from a plurality of additives according to a certain proportion to form a heterogeneous unstable chemical system, and the anti-swelling agent and the plurality of additives are prepared in advance, so that additional fluid preparation equipment is needed, a certain fluid tank is occupied, the degree of automation is low, the labor intensity is high, the timeliness is low, the fracturing construction progress is seriously affected, and a certain safety and environmental protection risk exists. The existing fracturing fluid system is difficult to meet the requirements of efficient and clean production, and development of a fracturing emulsion with multiple effects and existing preparation is urgently needed.
The anti-swelling agent is an important treatment agent of the fracturing fluid, and can inhibit hydration expansion and dispersion migration of clay minerals caused by the entering of the fracturing fluid into a reservoir, so as to prevent the permeability of the reservoir from being reduced. The existing commonly used anti-swelling agents for fracturing mainly comprise inorganic salts such as potassium chloride, ammonium chloride and the like, cationic polymers and small cationic compounds, and during the traditional fracturing construction, the anti-swelling agents, polymer solution and fracturing fluid are mainly mixed and injected into underground operation, so that the construction process is complicated.
Disclosure of Invention
In order to overcome the defects of the prior art, the application aims to provide a fracturing emulsion which is anti-swelling and can be added with polymers on line and a preparation method thereof, wherein the fracturing emulsion has an anti-swelling effect, can be directly used by being mixed with other formula aqueous solutions in an implementation site, does not need a polymer dissolving step in a fracturing process, and is quaternized by using tributylamine in a ground high-temperature trigger oil phase, and the water solubility is enhanced, so that the fracturing emulsion is transferred from the oil phase to the water phase, and has the anti-swelling effect.
In order to achieve the above purpose, the application is realized by adopting the following technical scheme:
the application provides a preparation method of an anti-swelling fracturing emulsion capable of adding polymers on line, which comprises the following steps:
s1: dissolving tributylamine and dimethyl carbonate as oil phase solute in white oil, adding composite emulsifier, stirring to form oil phase;
s2: dissolving acrylamide and acrylic acid as polymer monomers in distilled water, adding an oxidant, and stirring uniformly to form a water phase;
s3: mixing the water phase and the oil phase uniformly, regulating the pH value, slowly adding a reducing agent at a set temperature to perform an initiation reaction, and continuously stirring for a set time after the initiation reaction is finished to obtain the fracturing emulsion with the anti-swelling function and capable of adding the polymer on line.
In the S1, the compound emulsifier is a compound of Span-80 and Tween-80, and the mass ratio of Span-80 to Tween-80 is (1.5-2.0): 1.
In the application, in the S1, the mass ratio of the white oil to the composite emulsifier is 2 (2.5-3).
In the application, in the S1, the mass ratio of tributylamine to dimethyl carbonate is 1 (2-4), and the mass ratio of oil phase solute to white oil is 1 (4-5).
In the application, in the S2, the molar ratio of the acrylamide to the acrylic acid is (1-2) 1, and the mass ratio of the polymer monomer to the distilled water is (3-4).
In the application, in the step S2, the oxidant is tert-butyl hydroperoxide, and the mass of the tert-butyl hydroperoxide is 1-2% of the mass of distilled water.
In the application, in the S3, the mass ratio of the oil phase to the water phase is 1 (2-3).
In the application further, in the step S3, the reducing agent is sodium metabisulfite, and the mass of the sodium metabisulfite is 2-3% of the mass of distilled water.
In the application, in the step S3, the pH value is 6-8, the set temperature is 15-19 ℃, and the set time is 8-10 h.
A fracturing emulsion which is prepared by adopting any one of the preparation methods and can be added with polymer on line.
Compared with the prior art, the application has the following beneficial effects:
the application provides a preparation method of an anti-swelling fracturing emulsion capable of adding polymers on line, which is simple in preparation method and simple and easy to obtain materials, wherein the fracturing emulsion triggers tributylamine quaternization in an oil phase by means of stratum temperature to enable an anti-swelling agent to generate quaternization reaction to gradually generate cations, so that the anti-swelling fracturing emulsion has an anti-swelling effect, water solubility and adsorption capacity are increased after positive charges are generated, the cations are separated from an oil phase and transferred to a water phase, and pollution to a reservoir caused by clay swelling, dispersion and migration in the reservoir due to well entering liquid in a construction process is prevented. In addition, the prepared fracturing emulsion can be directly used by being mixed with other formula aqueous solutions on the implementation site, and a polymer dissolving step in the fracturing process is not needed.
Drawings
FIG. 1 is a graph showing the viscosity of the fracturing emulsion prepared in example 1 as a function of its mass concentration.
Detailed Description
So that those skilled in the art can appreciate the features and effects of the present application, a general description and definition of the terms and expressions set forth in the specification and claims follows. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and in the event of a conflict, the present specification shall control.
The theory or mechanism described and disclosed herein, whether right or wrong, is not meant to limit the scope of the application in any way, i.e., the present disclosure may be practiced without limitation to any particular theory or mechanism.
All features such as values, amounts, and concentrations that are defined herein in the numerical or percent ranges are for brevity and convenience only. Accordingly, the description of a numerical range or percentage range should be considered to cover and specifically disclose all possible sub-ranges and individual values (including integers and fractions) within the range.
Herein, unless otherwise indicated, "comprising," "including," "having," or similar terms encompass the meanings of "consisting of … …" and "consisting essentially of … …," e.g., "a includes a" encompasses the meanings of "a includes a and the other and" a includes a only.
In this context, not all possible combinations of the individual technical features in the individual embodiments or examples are described in order to simplify the description. Accordingly, as long as there is no contradiction between the combinations of these technical features, any combination of the technical features in the respective embodiments or examples is possible, and all possible combinations should be considered as being within the scope of the present specification.
The application provides an anti-swelling fracturing emulsion capable of being added with polymers on line and a preparation method thereof.
The application will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
The following examples use instrumentation conventional in the art. The experimental methods, in which specific conditions are not noted in the following examples, are generally conducted under conventional conditions or under conditions recommended by the manufacturer. The following examples used various starting materials, unless otherwise indicated, were conventional commercial products, the specifications of which are conventional in the art. In the description of the present application and the following examples, "%" means weight percent, and "parts" means parts by weight, and ratios means weight ratio, unless otherwise specified.
The application provides a preparation method of an anti-swelling fracturing emulsion capable of adding polymers on line, which comprises the following steps:
s1: a certain amount of tributylamine and dimethyl carbonate are weighed and dissolved in a certain amount of white oil as oil phase solutes, and then a certain amount of Span-80 and Tween-80 are added and stirred uniformly to form an oil phase.
Wherein the mass ratio of Span-80 to Tween-80 is (1.5-2.0): 1, the mass ratio of white oil to composite emulsifier, namely Span-80 to Tween-80, is 2 (2.5-3), and the mass ratio of tributylamine to dimethyl carbonate is 1 (2-4).
The mass ratio of tributyl amine and dimethyl carbonate, namely oil phase solute to white oil, is 1 (4-5).
S2: weighing a certain amount of distilled water, adding a certain amount of polymer monomer, namely acrylamide and acrylic acid, adding an oxidant, namely tert-butyl hydroperoxide, and stirring uniformly to form a water phase.
Wherein the molar ratio of the acrylamide to the acrylic acid is (1-2) 1, the acrylamide and the acrylic acid are taken as polymer monomers, and the mass ratio of the polymer monomers to the distilled water is (1-3). The mass of the oxidant is 1-2% of the mass of the distilled water.
S3: mixing the oil phase and the water phase uniformly, regulating the pH value to 6-8, slowly adding sodium metabisulfite at 15-19 ℃, and reacting for 8-10 h after completion to obtain the fracturing emulsion with the anti-swelling function and capable of being added with the polymer on line.
Wherein the mass ratio of the oil phase to the water phase is 1 (2-3), and the mass of the sodium metabisulfite is 2-3% of the mass of distilled water.
The use temperature of the fracturing emulsion is 80-120 ℃.
The fracturing emulsion of the application enables the anti-swelling agent to generate quaternization reaction by means of stratum temperature, so that cations are generated gradually, water solubility and adsorption capacity are increased after positive charges are generated, the cations are separated from an oil phase and transferred to a water phase, and pollution to a reservoir layer caused by swelling, dispersion and migration of clay in the reservoir layer due to well entering liquid in the construction process is prevented. The fracturing emulsion can be directly used by being mixed with other formula aqueous solutions on an implementation site, and a polymer dissolving step in a fracturing process is not needed.
The application is further illustrated by the following examples:
example 1
3.33g of tributylamine and 6.67g of dimethyl carbonate are weighed and dissolved in 40.00g of white oil as an oil phase solute, and then 30.00g of Span-80 and 20.00g of Tween-80 are added and stirred uniformly to form an oil phase. 214.71g of distilled water were weighed out and 35.54g of acrylamide and 36.03g of acrylic acid were added. 2.15g of t-butyl hydroperoxide were added. Stirred well to form an aqueous phase. Weighing 50.00g of oil phase and 100.0g of water phase, uniformly mixing, regulating the pH value to 7, slowly adding 4.29g of sodium metabisulfite at 15 ℃, and continuing to react for 10 hours after completion to obtain the anti-swelling fracturing emulsion capable of adding polymers on line.
Example 2
2.50g of tributylamine and 7.50g of dimethyl carbonate are weighed and dissolved in 50.00g of white oil as an oil phase solute, and 50.00g of Span-80 and 25.00g of Tween-80 are added and stirred uniformly to form an oil phase. 428.43g of distilled water were weighed out and 71.08g of acrylamide and 36.03g of acrylic acid were added. 8.57g of t-butyl hydroperoxide were added. Stirred well to form an aqueous phase. Weighing 50.00g of oil phase and 150.00g of water phase, uniformly mixing, adjusting the pH to 8, slowly adding 8.57g of sodium metabisulfite at 17 ℃, and continuing to react for 8 hours after completion to obtain the anti-swelling fracturing emulsion capable of adding polymers on line.
Example 3
2.00g of tributylamine and 8.00g of dimethyl carbonate are weighed and dissolved in 40.00g of white oil as oil phase solute, and then 30.00g of Span-80 and 20.00g of Tween-80 are added and stirred uniformly to form an oil phase. 214.71g of distilled water were weighed out and 35.54g of acrylamide and 36.03g of acrylic acid were added. 4.29g of t-butyl hydroperoxide were added. Stirred well to form an aqueous phase. Weighing 50.00g of oil phase and 100.00g of water phase, uniformly mixing, regulating the pH value to 7, slowly adding 6.44g of sodium metabisulfite at 19 ℃, and continuing to react for 9 hours after completion to obtain the anti-swelling fracturing emulsion capable of adding polymers on line.
Example 4
2.50g of tributylamine and 7.50g of dimethyl carbonate are weighed and dissolved in 50.00g of white oil as an oil phase solute, and 50.00g of Span-80 and 25.00g of Tween-80 are added and stirred uniformly to form an oil phase. 321.33g of distilled water were weighed out and 71.08g of acrylamide and 36.03g of acrylic acid were added. 3.21g of t-butyl hydroperoxide were added. Stirred well to form an aqueous phase. Weighing 50.00g of oil phase and 150.00g of water phase, uniformly mixing, regulating the pH value to 6, slowly adding 9.64g of sodium metabisulfite at 17 ℃, and continuing to react for 10 hours after the completion of the reaction to obtain the anti-swelling fracturing emulsion capable of adding polymers on line.
Example 5
2.00g of tributylamine and 8.00g of dimethyl carbonate are weighed and dissolved in 50.00g of white oil as an oil phase solute, and 50.00g of Span-80 and 25.00g of Tween-80 are added and stirred uniformly to form an oil phase. 428.44g of distilled water were weighed out and 71.08g of acrylamide and 36.03g of acrylic acid were added. 8.57g of t-butyl hydroperoxide were added. Stirred well to form an aqueous phase. Weighing 50.00g of oil phase and 150.00g of water phase, uniformly mixing, regulating the pH value to 7, slowly adding 12.85g of sodium metabisulfite at 19 ℃, and continuing to react for 10 hours after completion to obtain the anti-swelling fracturing emulsion capable of adding polymers on line.
To characterize the flow properties of the fracturing emulsion, the fracturing emulsion synthesized in example 1 was tested for viscosity at different mass concentrations at room temperature of 25 ℃ and the results are shown in fig. 1. As can be seen from fig. 1, the viscosity value of the fracturing emulsion increases as the mass concentration increases. When the mass concentration of the fracturing emulsion is 1wt.%, the viscosity is 345 mPas, which indicates that the synthesized fracturing emulsion type has better fluidity.
To characterize the anti-swelling effect of the fracturing emulsion, the anti-swelling performance of the fracturing fluid anti-drainage was tested at 90 ℃ and the results are shown in table 1. As can be seen from Table 1, the anti-swelling rate of the fracturing fluid in the reverse drainage process can reach more than 86%, and the fracturing emulsion on the surface can effectively inhibit the swelling of clay minerals.
TABLE 1 anti-swelling Property of fracturing fluid anti-drainage
To characterize the sand carrying performance of the fracturing emulsion, the sand suspending sedimentation rate was tested at 90 ℃ with a proppant of 40 mesh ceramsite, and the experimental results are shown in table 2. As can be seen from Table 2, the sedimentation rate of the propping agent in the fracturing emulsion system is about 0.1cm/min, which shows that the fracturing emulsion has good sand carrying performance.
TABLE 2 suspended sand settling rate of fracturing emulsions
| Project | Example 1 | Example 2 | Example 3 | Examples4 | Example 5 |
| Sedimentation rate (cm/min) | 0.12 | 0.10 | 0.09 | 0.11 | 0.11 |
According to the application, tributyl amine and dimethyl carbonate are dissolved in an oil phase, and the high-temperature triggering characteristic is adopted to trigger the quaternization of the tributyl amine in the oil phase at a well bottom high temperature, so that the water solubility of the tributyl amine is enhanced, and the tributyl amine is separated from the oil phase to the water phase, so that the anti-swelling effect is achieved. The quaternary ammonium salt anti-swelling agent can be adsorbed on the surface of clay through intermolecular force, hydrogen bond force and other actions, has the function of obviously preventing hydration swelling and dispersion migration of clay minerals in a reservoir, can be applied to oilfield fracturing fluid, and the fracturing emulsion prepared by the application has the anti-swelling effect and can be added with polymers on line, and has the characteristics of multiple effects and simple construction.
The above is only for illustrating the technical idea of the present application, and the protection scope of the present application is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present application falls within the protection scope of the claims of the present application.
Claims (4)
1. The preparation method of the anti-swelling fracturing emulsion capable of adding polymers on line is characterized by comprising the following steps of:
s1: dissolving tributylamine and dimethyl carbonate as oil phase solute in white oil, adding composite emulsifier, stirring to form oil phase;
s2: dissolving acrylamide and acrylic acid as polymer monomers in distilled water, adding an oxidant, and stirring uniformly to form a water phase;
s3: uniformly mixing the water phase and the oil phase, regulating the pH value, slowly adding a reducing agent at a set temperature to perform an initiation reaction, and continuously stirring for a set time after the initiation reaction is finished to obtain fracturing emulsion with an anti-swelling function and capable of being added with polymers on line;
in the S1, the compound emulsifier is a compound of Span-80 and Tween-80, and the mass ratio of Span-80 to Tween-80 is (1.5-2.0): 1;
in the step S1, the mass ratio of the white oil to the composite emulsifier is 2 (2.5-3);
in the step S1, the mass ratio of tributylamine to dimethyl carbonate is 1 (2-4), and the mass ratio of oil phase solute to white oil is 1 (4-5);
in the step S2, the molar ratio of the acrylamide to the acrylic acid is (1-2) 1, and the mass ratio of the polymer monomer to the distilled water is (3-4);
in the step S3, the mass ratio of the oil phase to the water phase is 1 (2-3);
in the step S3, the pH value is 6-8, the set temperature is 15-19 ℃, and the set time is 8-10 h.
2. The method for preparing the anti-swelling fracturing emulsion capable of being added with polymers on line according to claim 1, wherein in the step S2, the oxidant is tert-butyl hydroperoxide, and the mass of the tert-butyl hydroperoxide is 1-2% of the mass of distilled water.
3. The method for preparing the anti-swelling fracturing emulsion capable of being added with polymers on line according to claim 1, wherein in the step S3, the reducing agent is sodium metabisulfite, and the mass of the sodium metabisulfite is 2-3% of the mass of distilled water.
4. A fracturing emulsion which is anti-swelling and polymer-in-line, prepared by the method of any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211069593.8A CN115417944B (en) | 2022-09-01 | 2022-09-01 | Anti-swelling fracturing emulsion capable of being added with polymer on line and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211069593.8A CN115417944B (en) | 2022-09-01 | 2022-09-01 | Anti-swelling fracturing emulsion capable of being added with polymer on line and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115417944A CN115417944A (en) | 2022-12-02 |
| CN115417944B true CN115417944B (en) | 2023-08-22 |
Family
ID=84201639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211069593.8A Active CN115417944B (en) | 2022-09-01 | 2022-09-01 | Anti-swelling fracturing emulsion capable of being added with polymer on line and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115417944B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838980A (en) * | 2012-07-26 | 2012-12-26 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | High temperature resistant cleansing emulsion or microemulsion fracturing fluid and preparation method thereof |
| CN109777124A (en) * | 2017-11-13 | 2019-05-21 | 戴�峰 | A kind of modification dimethyl carbonate lotion of hydrolysis and preparation method thereof |
| CN111423537A (en) * | 2020-05-18 | 2020-07-17 | 四川申和新材料科技有限公司 | Fracturing fluid stock solution and preparation method thereof, acidizing fracturing fluid, resistance reducing water and sand-carrying fracturing fluid |
| CN112608729A (en) * | 2020-12-15 | 2021-04-06 | 陕西科技大学 | Fracturing fluid capable of storing acid triggering in phase-separable manner and preparation method and application thereof |
| CN114014994A (en) * | 2021-11-19 | 2022-02-08 | 四川省贝特石油技术有限公司 | Resistance reducing agent capable of mixing and adjusting viscosity on line, resistance reducing type fracturing fluid and preparation method thereof |
| CN114350341A (en) * | 2022-01-13 | 2022-04-15 | 陕西科技大学 | Emulsion type thickening agent for fracturing and preparation method and application thereof |
-
2022
- 2022-09-01 CN CN202211069593.8A patent/CN115417944B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838980A (en) * | 2012-07-26 | 2012-12-26 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | High temperature resistant cleansing emulsion or microemulsion fracturing fluid and preparation method thereof |
| CN109777124A (en) * | 2017-11-13 | 2019-05-21 | 戴�峰 | A kind of modification dimethyl carbonate lotion of hydrolysis and preparation method thereof |
| CN111423537A (en) * | 2020-05-18 | 2020-07-17 | 四川申和新材料科技有限公司 | Fracturing fluid stock solution and preparation method thereof, acidizing fracturing fluid, resistance reducing water and sand-carrying fracturing fluid |
| CN112608729A (en) * | 2020-12-15 | 2021-04-06 | 陕西科技大学 | Fracturing fluid capable of storing acid triggering in phase-separable manner and preparation method and application thereof |
| CN114014994A (en) * | 2021-11-19 | 2022-02-08 | 四川省贝特石油技术有限公司 | Resistance reducing agent capable of mixing and adjusting viscosity on line, resistance reducing type fracturing fluid and preparation method thereof |
| CN114350341A (en) * | 2022-01-13 | 2022-04-15 | 陕西科技大学 | Emulsion type thickening agent for fracturing and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115417944A (en) | 2022-12-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2005231200B2 (en) | Clay stabilization in sub-surface formations | |
| WO2013188413A1 (en) | Crosslinked synthetic polymer gel systems for hydraulic fracturing | |
| GB2091320A (en) | Enhanced oil displacement processes and compositions | |
| CN106350053A (en) | Quick-dissolving type seawater-based high-temperature fracturing fluid | |
| CN105154034A (en) | Anti-swelling shrinking agent | |
| DE2657443A1 (en) | METHOD AND COMPOSITION FOR ACIDIFICATION OF UNDERGROUND FORMATIONS | |
| US4494606A (en) | Process for improving vertical conformance in a near well bore environment | |
| CN110358510B (en) | Strong-sensitive anti-swelling inhibitor for continental facies shale and preparation method thereof | |
| CN111607382B (en) | Thickening acid and preparation method thereof | |
| CN115417944B (en) | Anti-swelling fracturing emulsion capable of being added with polymer on line and preparation method thereof | |
| CN104403655B (en) | A kind of oil field fracturing fluid and preparation method thereof | |
| EP0130732B1 (en) | Anionic polymer composition and its use for stimulating a subterranean formation | |
| CN111394087A (en) | Preparation method of non-oxidative gel breaker for fracturing | |
| CN111218265A (en) | Organic chromium water shutoff profile control agent and preparation method and application thereof | |
| CN111350474B (en) | Plugging method of secondary cross-linked interpenetrating network gel capable of realizing deep profile control and flooding | |
| CN110387006B (en) | Acrylamide polymer inverse emulsion and application thereof as supramolecular coating agent in water-based drilling fluid | |
| CN111471130A (en) | Resistance reducing agent for online mixing variable viscosity fracturing and preparation method thereof | |
| RU2659443C2 (en) | Composition for water inflow limitation into production wells | |
| CN112322272B (en) | Low-pollution multifunctional salt-resistant resistance-reducing fracturing agent | |
| CN112390908A (en) | Polymer suspension, method for the production thereof and use thereof | |
| CN108276981A (en) | A kind of fracturing liquid rubber-breaking accelerating agent, fracturing fluid system and their preparation method | |
| CN113105874B (en) | Double-inorganic-acid-salt clay stabilizer for shale fracturing and preparation method thereof | |
| CN116218494B (en) | Composite auxiliary agent, deep profile control crosslinking agent, preparation method and application thereof | |
| US11851608B2 (en) | Compositions and methods for deep penetration treatments of fines migration and sand control in clay-laden formations | |
| RU2812302C1 (en) | Viscoelastic composition for well killing |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231220 Address after: 750000, east of Shengyuan Road and west of Jiangjiagou Road, Ningdong Base Coal Chemical Industry Park, Yinchuan City, Ningxia Hui Autonomous Region Patentee after: Ningxia ningju Oilfield Materials Technology Co.,Ltd. Address before: 710000 No. B49, Xinda Zhongchuang space, 26th Street, block C, No. 2 Trading Plaza, South China City, international port district, Xi'an, Shaanxi Province Patentee before: Xi'an Huaqi Zhongxin Technology Development Co.,Ltd. Effective date of registration: 20231220 Address after: 710000 No. B49, Xinda Zhongchuang space, 26th Street, block C, No. 2 Trading Plaza, South China City, international port district, Xi'an, Shaanxi Province Patentee after: Xi'an Huaqi Zhongxin Technology Development Co.,Ltd. Address before: 710021 Shaanxi province Xi'an Weiyang University Park Patentee before: SHAANXI University OF SCIENCE & TECHNOLOGY |
|
| TR01 | Transfer of patent right |