CN109868131B - Gemini viscoelastic surfactant, preparation method and application thereof, and diverting acid - Google Patents
Gemini viscoelastic surfactant, preparation method and application thereof, and diverting acid Download PDFInfo
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- 239000004094 surface-active agent Substances 0.000 title claims abstract description 36
- 239000002253 acid Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 239000003112 inhibitor Substances 0.000 claims abstract description 9
- 239000004927 clay Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 55
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 235000019441 ethanol Nutrition 0.000 claims description 19
- 239000002904 solvent Substances 0.000 claims description 17
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims description 16
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 claims description 14
- 239000013067 intermediate product Substances 0.000 claims description 14
- 238000002390 rotary evaporation Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- 238000004821 distillation Methods 0.000 claims description 7
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 claims description 6
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 6
- 230000020477 pH reduction Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 125000002252 acyl group Chemical group 0.000 claims description 2
- 125000003910 behenoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 claims 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims 1
- 235000021357 Behenic acid Nutrition 0.000 claims 1
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 claims 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims 1
- 239000005642 Oleic acid Substances 0.000 claims 1
- 235000021355 Stearic acid Nutrition 0.000 claims 1
- 229940116226 behenic acid Drugs 0.000 claims 1
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 claims 1
- 230000002209 hydrophobic effect Effects 0.000 claims 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims 1
- 235000021313 oleic acid Nutrition 0.000 claims 1
- 239000008117 stearic acid Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000243 solution Substances 0.000 description 19
- 230000035699 permeability Effects 0.000 description 7
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 6
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- -1 hydrogen ions Chemical class 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 2
- 229910001447 ferric ion Inorganic materials 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- UCWYGNTYSWIDSW-QXMHVHEDSA-N (z)-n-[3-(dimethylamino)propyl]octadec-9-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCCN(C)C UCWYGNTYSWIDSW-QXMHVHEDSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical compound CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229940049292 n-(3-(dimethylamino)propyl)octadecanamide Drugs 0.000 description 1
- MNAZHGAWPCLLGX-UHFFFAOYSA-N n-[3-(dimethylamino)propyl]docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(=O)NCCCN(C)C MNAZHGAWPCLLGX-UHFFFAOYSA-N 0.000 description 1
- WWVIUVHFPSALDO-UHFFFAOYSA-N n-[3-(dimethylamino)propyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCCN(C)C WWVIUVHFPSALDO-UHFFFAOYSA-N 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention provides a gemini viscoelastic surfactant and a preparation method thereof. Wherein, the diverting acid comprises the following components in percentage by mass: 3-5% of gemini viscoelastic surfactant, 15-18% of hydrochloric acid, 1-2% of acidizing corrosion inhibitor, 1% of iron ion stabilizer, 1% of clay stabilizer and the balance of water. The diverting acid provided by the invention has better temperature resistance and excellent high-temperature diverting performance.
Description
Technical Field
The invention relates to the field of reservoir acidification modification in the oil exploitation industry, in particular to a gemini viscoelastic surfactant, a preparation method and application thereof, and a diverting acid.
Background
The acidification and transformation of the oil and gas reservoir is one of effective measures for increasing the yield of the oil and gas well and increasing the injection of a water injection well. Due to the heterogeneity of the reservoir, the acid liquid enters the high permeability area with the minimum resistance preferentially after entering the stratum, after the high permeability area is effectively acidified, the resistance is continuously reduced, so that the acid liquid flows into the high permeability area intensively, while the low permeability area with a larger pollution degree is not effectively acidified and reformed, so that the permeability of the reservoir is increased, and the interlayer contradiction is increased. Therefore, for the acidizing reformation of the heterogeneous reservoir, the core of the acidizing reformation lies in how to evenly place the acid liquor in a high permeability area and a low permeability area. At present, the commonly used uniform acid distribution techniques are mainly divided into two categories: mechanical methods and chemical methods. The mechanical method comprises the following steps: the coiled tubing drags, a packer is used, and the like, and the methods have high construction cost and are difficult to use in a well with a special structure. The chemical method comprises the following steps: foam diversion, high polymer underground cross-linking diversion, and viscoelastic surfactant diversion; the foam steering technology has poor stability and is difficult to use in high-temperature stratum; the high polymer underground cross-linking steering technology has high steering efficiency, but is difficult to break gel and has great damage to the stratum. The viscoelastic surfactant steering technology is used as a novel steering technology, has the characteristics of high steering efficiency, automatic gel breaking when meeting oil, low damage to stratum and the like, and is widely applied to various large oil fields at home and abroad at present.
The viscoelastic surfactant steering technology is a condition-responsive steering technology, after acid liquor enters a reservoir, the concentration of hydrogen ions in the acid liquor is gradually reduced along with the proceeding of acid rock reaction, the concentration of calcium and magnesium ions is gradually increased, the aggregation form of viscoelastic surfactant molecules is changed to form a complex network structure, the viscosity of an acid liquor system is increased, the flow resistance is increased, the flow direction of the subsequently injected acid liquor is changed, and the subsequently injected acid liquor enters a low-permeability area, so that the reservoir is effectively acidized and reformed. At present, viscoelastic surfactants for diversion acidification reported at home and abroad mainly comprise single viscoelastic surfactants, and the temperature resistance of the viscoelastic surfactants is generally lower than 120 ℃. The gemini viscoelastic surfactant has the characteristics of low critical micelle concentration, good temperature resistance and the like. Therefore, the development of gemini viscoelastic surfactants for diverting acids is of great practical significance.
Disclosure of Invention
The invention aims to provide a gemini viscoelastic surfactant, a preparation method and application thereof, and a diverting acid containing the gemini viscoelastic surfactant.
A gemini viscoelastic surfactant having the structure:
in the formula:
r1CO ═ erucyl, behenoyl, oleic or stearic acyl
R2＝CH3、CH2CH3、CH2CH2OH、CH2CH2CH2SO3Na、CH2CH2COOH
R3＝CH3、CH2CH3、CH2CH2OH、CH2C6H5、C6H5
Further, in the present invention, R2, R3 have the following structures;
wherein R2 has the structure:
wherein R3 has the structure:
the preparation method of the gemini viscoelastic surfactant comprises the following steps:
(1) dissolving 1, 3-propane sultone in absolute ethyl alcohol, dripping into methylamine alcohol solution, reacting for 12 hours at room temperature, and filtering to obtain white solid-intermediate A; wherein the molar ratio of the 1, 3-propane sultone to methylamine is 1: 1.1;
(2) dissolving the intermediate A in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and epoxy chloropropane, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B; wherein the molar ratio of the intermediate A, hydrochloric acid and epichlorohydrin is 1:1-2: 2-5;
(3) dissolving the intermediate product B in ethanol, adding erucyl amidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; after the reaction is finished, removing the solvent by reduced pressure distillation to obtain the gemini viscoelastic surfactant; wherein the molar ratio of the intermediate B to erucamidopropyldimethylamine is 1: 2-2.1.
Further, in the preferred embodiment of the present invention, methylamine can be ethylamine, ethanolamine, aniline, benzylamine.
Further, in a preferred embodiment of the present invention, the 1, 3-propane sultone may be acrylic acid.
Further, in a preferred embodiment of the present invention, the intermediate a may be dimethylamine, diethylamine, diethanolamine, N-methyl-2-hydroxyethylamine, N-methylaniline.
Further, in a preferred embodiment of the present invention, the erucamidopropyldimethylamine can be oleamidopropyldimethylamine, stearamidopropyldimethylamine, behenamidopropyldimethylamine.
The application of the gemini viscoelastic surfactant in preparing diverting acid.
The diverting acid comprises the prepared gemini viscoelastic surfactant, hydrochloric acid, an acidification corrosion inhibitor, an iron ion stabilizer and a clay stabilizer. Further, the diverting acid comprises: 3-5% of gemini viscoelastic surfactant, 15-18% of hydrochloric acid, 1-2% of acidizing corrosion inhibitor, 1% of iron ion stabilizer, 1% of clay stabilizer and the balance of water.
Further, the acidizing corrosion inhibitor is a Mannich base compound as described above.
The invention has the beneficial effects that:
the invention provides a gemini viscoelastic surfactant and a preparation method thereof. The gemini viscoelastic surfactant disclosed by the invention has the characteristics of low critical micelle concentration, good temperature resistance and the like, and the diverting acid prepared from the gemini viscoelastic surfactant has strong tackifying capability, good temperature resistance and better temperature and shear resistance, can be used for independently and thoroughly breaking gel when meeting stratum hydrocarbon substances, has small damage to the stratum and can be used for a high-temperature reservoir.
Drawings
FIG. 1 is a rheological profile after acid-diversion viscosification prepared with 5% VDA-YT + 15% hydrochloric acid + 2% acidizing corrosion inhibitor + 1% ferric ion thermometer + 1% clay stabilizer + 76% water in example 6;
FIG. 2 is a rheological profile after acid-diversion viscosification prepared from example 7 using 3.5% VDA-YA + 15% hydrochloric acid + 2% acidizing corrosion inhibitor + 1% ferric ion thermometer + 1% clay stabilizer + 77.5% water.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below clearly and completely, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
(1) dissolving 0.1mol of ethanolamine in absolute ethyl alcohol, dissolving 0.1mol of 1, 3-propane sultone in absolute ethyl alcohol, dripping ethanolamine alcohol solution, reacting at room temperature for 12 hours, and removing the solvent by rotary evaporation to obtain an intermediate A;
(2) dissolving 0.1mol of the intermediate A in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and 0.2mol of epichlorohydrin, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B;
(3) dissolving 0.1mol of the intermediate product B in ethanol, adding 0.21mol of erucamidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; after the reaction is finished, the solvent is removed by reduced pressure distillation to obtain the gemini viscoelastic surfactant VDA-YA.
Example 2:
(1) dissolving 0.1mol of aniline in absolute ethyl alcohol, dissolving 0.1mol of 1, 3-propane sultone in absolute ethyl alcohol, dripping aniline alcohol solution, reacting at room temperature for 12 hours, and removing the solvent by rotary evaporation to obtain an intermediate A;
(2) dissolving 0.1mol of the intermediate A in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and 0.2mol of epichlorohydrin, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B;
(3) dissolving 0.1mol of the intermediate product B in ethanol, adding 0.21mol of erucamidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; after the reaction is finished, the solvent is removed by reduced pressure distillation to obtain the gemini viscoelastic surfactant VDA-YA.
Example 3:
(1) dissolving 0.1mol of diethylamine in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and 0.2mol of epichlorohydrin, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B;
(2) dissolving 0.1mol of the intermediate product B in ethanol, adding 0.21mol of erucamidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; after the reaction is finished, the solvent is removed by reduced pressure distillation to obtain the gemini viscoelastic surfactant VDA-YT.
Example 4:
(1) dissolving 0.1mol of N-methylaniline in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and epoxy chloropropane, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B;
(2) dissolving 0.1mol of the intermediate product B in ethanol, adding 0.21mol of erucamidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; after the reaction is finished, the solvent is removed by reduced pressure distillation to obtain the gemini viscoelastic surfactant VDA-NB.
Example 5
(1) Dissolving 0.1mol of methylamine in absolute ethyl alcohol, dripping 0.1mol of acrylic acid absolute ethyl alcohol into methylamine alcohol solution, adding a small amount of hydroquinone, reacting for 6 hours at 60 ℃, and removing the solvent by rotary evaporation to obtain an intermediate A;
(2) dissolving 0.1mol of the intermediate A in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and 0.2mol of epichlorohydrin, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B;
(3) dissolving 0.1mol of the intermediate product B in ethanol, adding 0.21mol of erucamidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; and after the reaction is finished, removing the solvent by reduced pressure distillation to obtain the gemini viscoelastic surfactant VDA-YS.
Example 6
The formula of the diverting acid prepared by taking VDA-YT as an example is as follows:
5% of VDA-YT, 15% of hydrochloric acid, 2% of an acidification corrosion inhibitor, 1% of an iron ion thermometer, 1% of a clay stabilizer and 76% of water. Adding calcium carbonate particles into the diverting acid to increase the viscosity of the system and obtain residual acid. And performing viscosity-temperature test on the residual acid under the condition of 170s-1, wherein the viscosity of the acid solution system can be kept above 50mPa & lt s & gt at 150 ℃, and the acid solution system has better temperature resistance. (see FIG. 1)
Example 7
The formula of the diverting acid prepared by taking VDA-YA as an example is as follows:
3.5% of VDA-YA, 15% of hydrochloric acid, 2% of acidizing corrosion inhibitor, 1% of iron ion thermometer, 1% of clay stabilizer and 77.5% of water. Adding calcium carbonate particles into the diverting acid to increase the viscosity of the system and obtain residual acid. And performing viscosity-temperature test on the residual acid under the condition of 170s-1, wherein the viscosity of the acid solution system can be kept above 35mPa at 140 ℃, and the acid solution system has better temperature resistance. (see FIG. 2)
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A gemini polycation viscoelastic surfactant is characterized in that the structural formula is as follows:
in the formula:
r1CO ═ erucyl, behenoyl, oleic or stearic acyl
R2＝CH3、CH2CH3、CH2CH2OH、CH2CH2CH2SO3Na、CH2CH2COOH
R3＝CH3、CH2CH3、CH2CH2OH、CH2C6H5、C6H5。
2. The gemini polycationic viscoelastic surfactant according to claim 1, wherein R1 is a hydrophobic carbon chain of erucic acid, behenic acid, oleic acid, stearic acid; r2 is CH3, CH2CH3, CH2CH2OH, CH2CH2CH2SO3Na, CH2CH2 COOH; r3 is CH3, CH2CH3, CH2CH2OH, CH2C6H5 or C6H 5.
3. A method of preparing a gemini polycationic viscoelastic surfactant according to claim 1, comprising:
(1) dissolving 1, 3-propane sultone in absolute ethyl alcohol, dripping into methylamine alcohol solution, reacting for 12 hours at room temperature, and filtering to obtain white solid-intermediate A; wherein the molar ratio of the 1, 3-propane sultone to methylamine is 1: 1.1;
(2) dissolving the intermediate A in a 50% ethanol solution, adding a proper amount of concentrated hydrochloric acid and epoxy chloropropane, reacting for 7 hours at 70 ℃, and removing the solvent by rotary evaporation to obtain an intermediate product B; wherein the molar ratio of the intermediate A, hydrochloric acid and epichlorohydrin is 1:1-2: 2-5;
(3) dissolving the intermediate product B in ethanol, adding erucyl amidopropyl dimethylamine, adding a small amount of sodium hydroxide as a catalyst, and reacting for 24 hours at 85 ℃; after the reaction is finished, removing the solvent by reduced pressure distillation to obtain the gemini polycation viscoelastic surfactant; wherein the molar ratio of the intermediate B to erucamidopropyldimethylamine is 1: 2-2.1.
4. Use of a gemini polycationic viscoelastic surfactant according to claim 1 for the preparation of a diverting acid.
5. A diverting acid comprising the gemini polycationic viscoelastic surfactant according to claim 1, hydrochloric acid, an acidification corrosion inhibitor, an iron ion stabilizer, and a clay stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910166285.9A CN109868131B (en) | 2019-03-06 | 2019-03-06 | Gemini viscoelastic surfactant, preparation method and application thereof, and diverting acid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910166285.9A CN109868131B (en) | 2019-03-06 | 2019-03-06 | Gemini viscoelastic surfactant, preparation method and application thereof, and diverting acid |
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| Publication Number | Publication Date |
|---|---|
| CN109868131A CN109868131A (en) | 2019-06-11 |
| CN109868131B true CN109868131B (en) | 2021-07-27 |
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| CN110218557B (en) * | 2019-07-01 | 2021-09-24 | 西南石油大学 | Salt-resistant Gemini zwitterionic viscoelastic surfactant and preparation method of high-salinity water-based clean fracturing fluid |
| CN111039819A (en) * | 2019-12-16 | 2020-04-21 | 西南石油大学 | Temperature-resistant salt-tolerant viscoelastic surfactant and preparation method and application thereof |
| CN112300024B (en) * | 2020-11-25 | 2023-08-04 | 陕西科技大学 | Gemini amphoteric carboxylate viscoelastic surfactant and synthesis method thereof |
| CN113621361B (en) * | 2021-08-09 | 2022-10-21 | 中国石油天然气股份有限公司 | Cationic viscoelastic surfactant, preparation method and application thereof, and fracturing fluid |
| CN116355598B (en) * | 2023-03-30 | 2024-04-26 | 甘肃省水利水电勘测设计研究院有限责任公司 | Low-dosage viscoelastic solid-free water-based drilling fluid and application thereof |
| CN117568005B (en) * | 2024-01-16 | 2024-03-22 | 大庆市唯品科技开发有限公司 | High-temperature-resistant viscoelastic surfactant steering de-plugging agent and preparation method thereof |
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| CN103965861A (en) * | 2014-05-21 | 2014-08-06 | 中国石油化工股份有限公司 | High temperature resistant Gemini cationic viscoelastic surfactant (VES) and synthetic method thereof |
| CN106947455A (en) * | 2017-03-21 | 2017-07-14 | 四川格鑫拓科技有限公司 | New how sub- viscoelastic surfactant and its preparation method and application |
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| US4772641A (en) * | 1985-06-20 | 1988-09-20 | Pfizer Inc. | Aqueous sulfomethylated melamine gel-forming compositions |
| CN103965861A (en) * | 2014-05-21 | 2014-08-06 | 中国石油化工股份有限公司 | High temperature resistant Gemini cationic viscoelastic surfactant (VES) and synthetic method thereof |
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