CN116554853A - Modified fracturing fluid thickener and preparation method thereof - Google Patents
Modified fracturing fluid thickener and preparation method thereof Download PDFInfo
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- 239000002562 thickening agent Substances 0.000 title claims abstract description 41
- 239000012530 fluid Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 17
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 239000000243 solution Substances 0.000 claims abstract description 28
- -1 alkenyl succinic anhydride Chemical compound 0.000 claims abstract description 27
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims abstract description 22
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims abstract description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229940014800 succinic anhydride Drugs 0.000 claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims abstract description 20
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 claims abstract description 14
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 239000004927 clay Substances 0.000 claims abstract description 10
- 239000012266 salt solution Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- ZIXQIYLQPUHVBI-UHFFFAOYSA-N 2-[carbamimidoyl(3-hydroxypropyl)amino]acetic acid Chemical group C(=O)(O)CN(C(=N)N)CCCO ZIXQIYLQPUHVBI-UHFFFAOYSA-N 0.000 claims description 9
- 239000001103 potassium chloride Substances 0.000 claims description 9
- 235000011164 potassium chloride Nutrition 0.000 claims description 9
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 7
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 150000002357 guanidines Chemical class 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—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
- C09K8/607—Compositions for stimulating production by acting on the underground formation specially adapted for clay formations
-
- 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
- C09K8/607—Compositions for stimulating production by acting on the underground formation specially adapted for clay formations
- C09K8/608—Polymer compositions
-
- 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
- C09K8/665—Compositions based on water or polar solvents containing inorganic 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
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- 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 invention discloses a modified fracturing fluid thickener and a preparation method thereof, and relates to the technical field of thickener preparation, wherein the modified fracturing fluid thickener comprises the following components in parts by weight: guanidine gum powder, 2-pyrrolidone, (2-chloroethyl) trimethyl ammonium chloride, alkenyl succinic anhydride, an alkaline catalyst, a salt solution, a temperature stabilizer and a clay stabilizer; the preparation method comprises the following steps: dissolving guanidine gum powder in ethanol under stirring to obtain a solution; sequentially dripping 2-pyrrolidone and a base catalyst into the solution, then adding (2-chloroethyl) trimethyl ammonium chloride, and stirring for reaction to obtain a reaction solution; adding alkenyl succinic anhydride and a salt solution into the reaction solution, and performing airtight reaction at constant temperature; and (3) washing the mixture by alcohol after the reaction is finished, and then adding a temperature stabilizer and a clay stabilizer for mixing to obtain the modified fracturing fluid thickening agent. According to the modified fracturing fluid thickener, a certain proportion of rigid rings and quaternary ammonium salt are introduced through modification, so that the influence of temperature on the molecular crimpability of guanidine gum is improved, and the temperature resistance and stability of the guanidine gum are improved.
Description
Technical Field
The invention relates to the technical field of thickener preparation, in particular to a modified fracturing fluid thickener and a preparation method thereof.
Background
The fracturing fluid used at home and abroad at present comprises water-based fracturing fluid, oil-based fracturing fluid, foam fracturing fluid and the like, water-based fracturing is one of the most common and effective methods of a hypotonic oil field, fracturing construction is an important means for increasing the yield of the oil-gas field, and can remarkably improve the permeability of stratum and the diversion capacity of the oil-gas field, so that the effect of increasing the yield is achieved.
At present, the most commonly used thickener in the fracturing technology is guanidine gum and modified derivatives thereof, wherein the guanidine gum is natural polymer galactomannose, has high viscosity and good stability in low-concentration aqueous solution, but the guanidine collagen powder has longer dissolution time with water, uncontrollable viscosity, poor stability, more residues after fracturing construction and poor temperature resistance, so the guanidine gum is subjected to targeted modification. At present, a plurality of patents related to modified guanidine gum fracturing fluid thickeners exist, but most of the patents are complex in synthesis, high in cost and required to change a crosslinking agent and other additives in a targeted manner during site construction.
Therefore, how to provide a modified fracturing fluid thickener which is simple to synthesize, low in cost and good in temperature resistance and a preparation method thereof is a technical problem which needs to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the invention provides a modified fracturing fluid thickener and a preparation method thereof to solve the problems encountered in the background technology.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the modified fracturing fluid thickening agent comprises the following components in parts by weight: 30-40 parts of guanidine gum powder, 20-30 parts of 2-pyrrolidone, 20-30 parts of (2-chloroethyl) trimethyl ammonium chloride, 10-15 parts of alkenyl succinic anhydride, 10-15 parts of an alkaline catalyst, 8-12 parts of a salt solution, 3-5 parts of a temperature stabilizer and 3-5 parts of a clay stabilizer.
Preferably, the guanidine gum powder is carboxymethyl hydroxypropyl guanidine gum.
Preferably, the alkenyl succinic anhydride is an alkyl anhydride having a carbon chain length of 16-20.
The invention utilizes the reaction of anhydride on alkenyl succinic anhydride with partial hydroxyl groups on guanidine to form esters to graft alkenyl groups on guanidine. The modified guanidine gum reduces intermolecular hydrogen bonding due to the introduction of a small amount of hydrophobic structure, so that the modified guanidine gum is easier to dissolve.
Preferably, the alkaline catalyst comprises sodium hydroxide.
Preferably, the salt solution is sodium carbonate solution, and the mass fraction of the sodium carbonate is 10-15%.
Preferably, the temperature stabilizer comprises one or a mixture of two of sodium thiosulfate or diethanolamine.
Preferably, the clay stabilizer comprises potassium chloride.
The invention also aims at providing a preparation method of the modified fracturing fluid thickener, which comprises the following steps:
(1) Placing guanidine gum powder into 25-30 times of ethanol, stirring and dissolving for 0.5-1h to obtain a solution;
(2) Sequentially dripping 2-pyrrolidone and a base catalyst into the solution, then adding (2-chloroethyl) trimethyl ammonium chloride, and stirring for reaction to obtain a reaction solution;
(3) Adding alkenyl succinic anhydride and a salt solution into the reaction solution, and performing airtight reaction at constant temperature;
(4) And (3) washing the mixture by alcohol after the reaction is finished, and then adding a temperature stabilizer and a clay stabilizer for mixing to obtain the modified fracturing fluid thickening agent.
In the whole process of the preparation method, special pressurizing equipment is not needed, so that the requirements on production sites and production equipment are lower, and the production is simpler. The raw materials required in the production process are all common chemical raw materials which are easy to obtain, so that too many reaction processes are not needed, and the quality control of the product is easy.
Preferably, the stirring reaction in the step (2) is stirring at 50-60 ℃ for 12-18h.
Preferably, the closed reaction in the step (3) is a reaction at 40-50 ℃ for 2-3h.
The preparation method of the modified fracturing fluid thickener is simple, convenient and feasible, the reaction temperature is not more than 70 ℃, and the conditions are mild and controllable.
Preferably, the alcohol in step (4) is methanol, ethanol or isopropanol.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the hydrophobic group is introduced into the guanidine gum by utilizing the esterification reaction, so that the comprehensive performance of the guanidine gum is improved. The acid anhydride used in the esterification reaction is liquid, and is easy to mix and has a higher boiling point in the preparation process.
2. According to the modified fracturing fluid thickener, a certain proportion of rigid rings and quaternary ammonium salt are introduced through modification, so that the influence of temperature on the molecular crimpability of guanidine gum is improved, and the temperature resistance and stability of the guanidine gum are improved.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The modified fracturing fluid thickening agent comprises the following components in parts by weight: 38 parts of carboxymethyl hydroxypropyl guanidine gum, 22 parts of 2-pyrrolidone, (2-chloroethyl) trimethyl ammonium chloride, 13 parts of alkenyl succinic anhydride, 12 parts of sodium hydroxide, 10 parts of 10wt% sodium carbonate solution, 4 parts of sodium thiosulfate and 3 parts of potassium chloride.
The alkenyl succinic anhydride is an alkyl anhydride having a carbon chain length of 16-20.
Example 2
The modified fracturing fluid thickening agent comprises the following components in parts by weight: 32 parts of carboxymethyl hydroxypropyl guanidine gum, 27 parts of 2-pyrrolidone, (2-chloroethyl) trimethyl ammonium chloride, 23 parts of alkenyl succinic anhydride, 10 parts of sodium hydroxide, 11 parts of 10wt% sodium carbonate solution, 3 parts of sodium thiosulfate, 2 parts of diethanolamine and 5 parts of potassium chloride.
The alkenyl succinic anhydride is an alkyl anhydride having a carbon chain length of 16-20.
Example 3
The modified fracturing fluid thickening agent comprises the following components in parts by weight: 35 parts of carboxymethyl hydroxypropyl guanidine gum, 25 parts of 2-pyrrolidone, (2-chloroethyl) trimethyl ammonium chloride, 22 parts of alkenyl succinic anhydride, 11 parts of sodium hydroxide, 13 parts of 15wt% sodium carbonate solution, 4 parts of diethanolamine and 4 parts of potassium chloride.
The alkenyl succinic anhydride is an alkyl anhydride having a carbon chain length of 16-20.
Example 4
The modified fracturing fluid thickening agent comprises the following components in parts by weight: 36 parts of carboxymethyl hydroxypropyl guanidine gum, 25 parts of 2-pyrrolidone, (2-chloroethyl) trimethyl ammonium chloride, 15 parts of alkenyl succinic anhydride, 10 parts of sodium hydroxide, 12 parts of 10wt% sodium carbonate solution, 3 parts of sodium thiosulfate and 3 parts of potassium chloride.
The alkenyl succinic anhydride is an alkyl anhydride having a carbon chain length of 16-20.
Example 5
The modified fracturing fluid thickening agent comprises the following components in parts by weight: 40 parts of carboxymethyl hydroxypropyl guanidine gum, 24 parts of 2-pyrrolidone, (2-chloroethyl) trimethyl ammonium chloride, 28 parts of alkenyl succinic anhydride, 10 parts of sodium hydroxide, 8 parts of 10wt% sodium carbonate solution, 5 parts of diethanolamine and 5 parts of potassium chloride.
The alkenyl succinic anhydride is an alkyl anhydride having a carbon chain length of 16-20.
Example 6
The preparation method of the modified fracturing fluid thickener described in the embodiments 1 to 5 comprises the following steps:
(1) The guanidine gum powder is placed in 30 times of ethanol and stirred and dissolved for 0.5h to obtain a dissolving solution;
(2) Sequentially dripping 2-pyrrolidone and a base catalyst into the solution, then adding (2-chloroethyl) trimethyl ammonium chloride, and stirring at 60 ℃ for 16 hours to obtain a reaction solution;
(3) Adding alkenyl succinic anhydride and a salt solution into the reaction solution, and performing airtight reaction for 3 hours at the constant temperature of 50 ℃;
(4) And (3) washing the mixture by methanol after the reaction is finished, and then adding a temperature stabilizer and a clay stabilizer for mixing to obtain the modified fracturing fluid thickening agent.
Example 7
The preparation method of the modified fracturing fluid thickener described in the embodiments 1 to 5 comprises the following steps:
(1) Placing guanidine gum powder into 25 times of ethanol, stirring and dissolving for 1h to obtain a dissolving solution;
(2) Sequentially dripping 2-pyrrolidone and a base catalyst into the solution, then adding (2-chloroethyl) trimethyl ammonium chloride, and stirring for 12 hours at 50 ℃ to obtain a reaction solution;
(3) Adding alkenyl succinic anhydride and a salt solution into the reaction solution, and performing airtight reaction for 2 hours at the constant temperature of 40 ℃;
(4) And (3) washing the mixture by methanol after the reaction is finished, and then adding a temperature stabilizer and a clay stabilizer for mixing to obtain the modified fracturing fluid thickening agent.
Comparative example 1
The raw materials comprise the following components in parts by weight: 40 parts of carboxymethyl hydroxypropyl guanidine gum, 11 parts of alkenyl succinic anhydride, 8 parts of 10wt% sodium carbonate solution, 5 parts of diethanolamine and 5 parts of potassium chloride;
the preparation method is the same as in example 7, except that step (2) is not included.
Comparative example 2
The raw materials comprise the following components in parts by weight: 40 parts of carboxymethyl hydroxypropyl guanidine gum, 24 parts of 2-pyrrolidone, 28 parts of (2-chloroethyl) trimethyl ammonium chloride, 10 parts of sodium hydroxide, 5 parts of diethanolamine and 5 parts of potassium chloride;
the preparation method is the same as in example 7, except that step (3) is not included.
Characterization of Performance
The tap water viscosity test method comprises the following steps: the fracturing thickeners prepared in examples 1-5 and comparative examples 1-2, prepared by the method of example 7, were dissolved in tap water at a concentration of 1.0 wt% respectively, at 200℃and shear rate of 170s -1 Shearing for 2 hours under the condition, and performing viscosity test;
10wt% calcium chloride brine viscosity test method: the fracturing thickeners prepared in examples 1-5 and comparative examples 1-2, respectively, prepared by the method of example 7, were prepared as follows1.0 wt% dissolved in 10wt% calcium chloride brine at 200℃and shear rate 170s -1 Shearing for 2 hours under the condition, and performing viscosity test;
the results are shown in Table 1:
TABLE 1
| Tap water viscosity (mPa.s) | 10% calcium chloride salt water viscosity (mPa.s) | |
| Example 1 | 151 | 82 |
| Example 2 | 153 | 84 |
| Example 3 | 155 | 83 |
| Example 4 | 151 | 88 |
| Example 5 | 152 | 87 |
| Comparative example 1 | 75 | 32 |
| Comparative example 2 | 102 | 45 |
As can be seen from Table 1, the fracturing fluid thickener provided by the invention is dissolved in tap water at 200 ℃ for 170s -1 Shearing for 2 hours, wherein the viscosity is more than 150 mPa.s; dissolved in 10wt% CaCl 2 In saline water at 200deg.C for 170s -1 The mixture is sheared for 2 hours, the viscosity is more than 80 mPa.s, and the mixture has excellent temperature resistance, salt resistance, shearing resistance and thickening effect.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The modified fracturing fluid thickener is characterized by comprising the following components in parts by weight: 30-40 parts of guanidine gum powder, 20-30 parts of 2-pyrrolidone, 20-30 parts of (2-chloroethyl) trimethyl ammonium chloride, 10-15 parts of alkenyl succinic anhydride, 10-15 parts of an alkaline catalyst, 8-12 parts of a salt solution, 3-5 parts of a temperature stabilizer and 3-5 parts of a clay stabilizer.
2. The modified fracturing fluid thickener of claim 1, wherein said guanidine gum powder is carboxymethyl hydroxypropyl guanidine gum.
3. The modified fracturing fluid thickener of claim 1 wherein said basic catalyst comprises sodium hydroxide.
4. The modified fracturing fluid thickener of claim 1, wherein the salt solution is a sodium carbonate solution, and the mass fraction of the sodium carbonate is 10-15%.
5. The modified fracturing fluid thickener of claim 1 wherein said temperature stabilizer comprises one or a mixture of sodium thiosulfate or diethanolamine.
6. The modified fracturing fluid thickener of claim 1 wherein said clay stabilizer comprises potassium chloride.
7. The method for preparing the modified fracturing fluid thickener according to any of claims 1 to 6, comprising the steps of:
(1) Placing guanidine gum powder into 25-30 times of ethanol, stirring and dissolving for 0.5-1h to obtain a solution;
(2) Sequentially dripping 2-pyrrolidone and a base catalyst into the solution, then adding (2-chloroethyl) trimethyl ammonium chloride, and stirring for reaction to obtain a reaction solution;
(3) Adding alkenyl succinic anhydride and a salt solution into the reaction solution, and performing airtight reaction at constant temperature;
(4) And (3) washing the mixture by alcohol after the reaction is finished, and then adding a temperature stabilizer and a clay stabilizer for mixing to obtain the modified fracturing fluid thickening agent.
8. The method for preparing a modified fracturing fluid thickener according to claim 7, wherein the stirring reaction in the step (2) is performed at 50-60 ℃ for 12-18 hours.
9. The method for preparing a modified fracturing fluid thickener according to claim 7, wherein the airtight reaction in the step (3) is carried out at 40-50 ℃ for 2-3 hours.
10. The method for preparing a modified fracturing fluid thickener according to claim 7, wherein in the step (4), the alcohol is methanol, ethanol or isopropanol.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117264088A (en) * | 2023-11-17 | 2023-12-22 | 东营市宝泽能源科技有限公司 | Instant guar gum and synthetic method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112210021A (en) * | 2020-10-28 | 2021-01-12 | 昆山京昆油田化学科技有限公司 | Cationic guar gum thickening agent and preparation method and application thereof |
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| CN102180986A (en) * | 2011-03-30 | 2011-09-14 | 陕西科技大学 | Alkenyl succinic anhydride-modified guar gum fracturing liquid thickening agent and preparation method thereof |
| CN102492048A (en) * | 2011-11-29 | 2012-06-13 | 中国石油化学昆山公司 | Fracturing fluid thickening agent and fracturing fluid containing the same |
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| CN117264088A (en) * | 2023-11-17 | 2023-12-22 | 东营市宝泽能源科技有限公司 | Instant guar gum and synthetic method and application thereof |
| CN117264088B (en) * | 2023-11-17 | 2024-02-06 | 东营市宝泽能源科技有限公司 | Instant guar gum and synthetic method and application thereof |
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