CN104694114A - Supramolecular clean fracturing fluid, and preparation method and application thereof - Google Patents
Supramolecular clean fracturing fluid, and preparation method and application thereof Download PDFInfo
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- CN104694114A CN104694114A CN201510089194.1A CN201510089194A CN104694114A CN 104694114 A CN104694114 A CN 104694114A CN 201510089194 A CN201510089194 A CN 201510089194A CN 104694114 A CN104694114 A CN 104694114A
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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
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- 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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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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
- C09K8/84—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
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/30—Viscoelastic surfactants [VES]
Abstract
The invention provides a supramolecular clean fracturing fluid, and a preparation method and application thereof. The fracturing fluid comprises the following components in percentage by weight: 0.1-5% of amphoteric surfactant, 0.1-0.8% of anionic polymer containing hydrophobic group, 0-2% of anionic surfactant, 0-4% of salt and the balance of water. The amphoteric surfactant is one or combination of an amide amphoteric surfactant with two hydrophilic groups and one hydrophobic group and an amide amphoteric surfactant with three hydrophilic groups and one hydrophobic group. The supramolecular clean fracturing fluid is applicable to oil-gas field fracturing, and can obtain higher consistency and viscoelasticity under the condition of lower concentration, thereby obtaining better rheological property and sand carrying effect.
Description
Technical field
The present invention relates to a kind of supramolecule clean fracturing fluid and preparation method thereof and application, belong to oil field.
Background technology
China's oil-gas field low permeability layer rich reserves, but its natural production capacity is low or basic without natural production capacity, improves per-well production without fracturing yield increasing transformation, is difficult to obtain economic development value.It is significant that application fracturing liquid technology exploits this kind of oil reservoir, and of the fracturing fluid major function takes propping agent containing memory fluid to bring into and press off stratum, increases rate of permeation to make frscturing.
How many residues after fracturing liquid aquation directly affects the height of fracturing effect.Conventional fracturing liquid is polymer guanidine glue glycan class or its modified product, and this type of fracturing liquid is still higher containing level of residue.Its residue derive from natural polymer itself insolubles and with metal corsslinking after completely broken glue product, these residues all can cause to fracturing fracture support belt rate of permeation and zone permeability the injury being difficult to recover, and have a strong impact on fracturing yield increasing effect.
Supramolecule material is the molecule aggregates formed based on intermolecular non-covalent interaction.According to Supramolecular self assembly principle, use intermolecular interaction force as instrument, the component or building block with specific structure and function is assembled into new super molecular compound according to certain mode.Viscoelastic surfactant is also the result that molecular association is assembled, and it is applied to oil-gas field fracturing liquid, meets after oil, and state of aggregation changes, englobement low-viscosity (mobile) liquid, automatically broken glue, and due to its be small molecules without residue, formation injures little; Viscoelastic surfactant fracturing liquid site operation is simple, does not need too much equipment, and without the need to linking agent, gel breaker and other auxiliary agents, therefore, have the advantage of its uniqueness.
United States Patent (USP) 5551516 discloses a kind of viscoelastic surfactant based fracturing liquid, in this fracturing liquid, use together with cats product also just like Repone K or the water miscible inorganic salt of ammonium chloride and the organic salt of similar water poplar acid sodium or alcohol as stablizer.United States Patent (USP) 5964295,6435277,6412561 discloses and uses viscoelastic surfactant based of the fracturing fluid component type and using method.United States Patent (USP) 6703352 discloses the composite composition of a kind of strand amphoterics containing carbon chain length 12-24 and inorganic salt, organic salt.
CN1285700C discloses a kind of formula of clean fracturing fluid, is mixed or the lipid acid of 18 carbon atoms, mineral alkali and salt solution mix by the unsaturated fatty acid salt of 18 carbon atoms and salt solution.CN1752173A discloses a kind of clean fracturing solution additive, its consist of Long carbon chain alkyl quaternary ammonium salts, Long carbon chain alkyl dimethyl amine oxide, salicylate, glycol ether, low-carbon alcohol, water.CN101775276A discloses a kind of fracturing liquid preparation method that can use under layer temperature condition higher, and it comprises Gemini cats product, amphoterics, electrolytic salt, gegenion salt, solubility promoter and water etc.CN102181279A discloses a kind of cationic quaternary ammonium salt form surfactant fracturing fluid of many hydrophilic groups.
Although viscoelastic surfactant class fracturing liquid has injure the plurality of advantages such as little without residue, formation, its higher working concentration, corresponding cost is higher, therefore requires further improvement.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of supramolecule clean fracturing fluid, this fracturing liquid just can obtain higher denseness and visco-elasticity under lower concentration, has better rheological and takes sand effect.
For achieving the above object, the invention provides a kind of supramolecule clean fracturing fluid, by weight percentage, this fracturing liquid comprises amphoterics 0.1%-5%, containing the anionic polymer 0.1%-0.8% of hydrophobic group, anion surfactant 0-2%, salt 0-4%, surplus is water, wherein:
Described amphoterics is have the amides amphoterics of two hydrophilic groups and a hydrophobic group, one or both the combination had in the amides amphoterics of three hydrophilic groups and a hydrophobic group.
In above-mentioned fracturing liquid, preferably, described amphoterics has the molecular structure as shown in following formula I
In formula I, x is 2 or 3;
R
1for carbon number is C24-54, and the acyl group containing x-CO-group;
R
2for the methylene group that carbon number is C2-5;
R
3for alkyl group ,-CH that carbon number is C1-4
2cH
2cOO-or-CH
2cH
2oH;
R
4for alkyl group ,-CH that carbon number is C1-4
2cH
2cOO-or-CH
2cH
2oH;
R
5for-CH
2-or-CH
2cH
2-.
In above-mentioned supramolecule clean fracturing fluid, preferably, described R
1structure shown in having any one of following formula II-IV:
In above-mentioned supramolecule clean fracturing fluid, preferably, described amphoterics comprises one or both the combination in DIBT, TDIBT; Described DIBT is amide dimer CAB tensio-active agent, containing two hydrophilic radicals and a hydrophobic grouping (this hydrophobic grouping is that carbon number is 36 and contains the acyl group of two-CO-) in its molecular structure; Described TDIBT is dimerization, melamine CAB mixed surfactant, wherein, by weight percentage, described TDIBT consists of 80%DIBT and 20% amido propyl betaine, and described amido propyl betaine contains three hydrophilic radicals and a hydrophobic grouping (this hydrophobic grouping is that carbon number is 54 and contains the acyl group of three-CO-); That is:
DIBT is one or both the combination in structure shown in formula (a), formula (b);
By weight percentage, TDIBT is the mixture of structure shown in 80%DIBT and 20% formula (c); Wherein, structure shown in formula (a), formula (b) and formula (c) is as follows:
In above-mentioned supramolecule clean fracturing fluid, preferably, the described anionic polymer containing hydrophobic group is partially hydrolyzed polyacrylamide, and described polyacrylamide comprises hydrophobic grouping and anionic group, and its molecular weight is 10-500 ten thousand; Described hydrophobic grouping comprises the hydrocarbon chain group that carbon number is the straight or branched of C12-22, and described hydrophobic grouping is connected with main chain by amido linkage or ester bond; Described anionic group is carboxyl or sulfo group; More preferably, the molecular weight of described polyacrylamide is 20-200 ten thousand, and the molecular weight of its hydrophobic grouping accounts for the 0.5-2% (mol ratio) of whole Molecular Weight for Polyacrylamide.
In above-mentioned supramolecule clean fracturing fluid, preferably, with the of the fracturing fluid weight percent meter of supramolecule, the add-on of described anion surfactant is 0.01-2%, described anion surfactant comprises the combination of one or more in alkyl carboxylate, alkyl-sulphate, alkyl fatty polyoxyethylene ether sulfate, alkylsulfonate, alkylbenzene sulfonate, alkyl alcohol polyethers Di-sodium Sulfo-succinate Mono Est-er, and described alkyl carbon number is C8-22; More preferably, described anion surfactant comprises the combination of one or more in sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, alkyl sodium sulfonate.
In above-mentioned supramolecule clean fracturing fluid, preferably, with the weight percent meter of supramolecule clean fracturing fluid, the add-on of described salt is 0.1-2%, described salt comprises the combination of one or more in Repone K, ammonium chloride, quaternary ammonium salt, and adding salt can prevent clay swelling.
In above-mentioned supramolecule clean fracturing fluid, preferably, described fracturing liquid also comprises the combination of one or more in nonionogenic tenside, cats product, alcoholic solvent; With the weight percent meter of supramolecule clean fracturing fluid, the add-on of described nonionogenic tenside is 0.1-2%, and the add-on of cats product is 0.01-0.5%, and the add-on of alcoholic solvent is 0.1-1%; More preferably, described nonionogenic tenside comprises the combination of one or more in alkyl fatty polyoxyethylenated alcohol, alkyl glycoside, alkylamide; Described cats product comprises alkyl quaternaries tensio-active agent; Described alcoholic solvent comprises the combination of one or more in methyl alcohol, ethanol, Virahol, ethylene glycol, propylene glycol.In fracturing liquid, add nonionogenic tenside, cats product can regulate of the fracturing fluid dissolution rate, improve its shear-stable ability.
Present invention also offers a kind of method preparing above-mentioned supramolecule clean fracturing fluid, it comprises the following steps: join in the anionic polymer aqueous solution containing hydrophobic group after amphoterics, anion surfactant and salt being mixed, stir, obtain supramolecule clean fracturing fluid.
In the above-mentioned methods, preferably, the preparation method of described amphoterics comprises the following steps: starting acid and organic amine are reacted 3-8 hour at 160-180 DEG C, obtains the first reaction intermediate; Distill the water in the first reaction intermediate and remaining organic amine, obtain the second reaction intermediate; Above-mentioned second reaction intermediate and the sodium chloroacetate aqueous solution are reacted 4-6 hour at 70-80 DEG C, obtains amphoterics; Wherein, described starting acid is dimerization stearic acid and/or trimerization stearic acid; Described organic amine is N, N-dimethyl-1,3-propylene diamine.
Be initiator and organic amine is obtained by reacting and R by polyprotonic acid
1during the corresponding intermediate of structure, dimeracid or trimer acid can refer to US Patent No. 5001260, US6187903 is obtained by unsaturated fatty acids acid-respons, and structure shown in formula II, III is possible isomer, or commercial compound can directly use.The mol ratio of dimeracid and amine is 1:2, and both react generation diamide, same principle, and the mol ratio of trimer acid and amine is 1:3, and reaction generates melamine.Multiamide forms betaine type promoting agent with carboxylic radical reaction further.
In the above-mentioned methods, preferably, the method also comprises the step of the combination of one or more added wherein as required in nonionogenic tenside, cats product, alcoholic solvent.
Present invention also offers the application of above-mentioned supramolecule clean fracturing fluid in oil-gas field fracturing, can apply with reference to other of the fracturing fluid application modes of the prior art when applying.
Supramolecule clean fracturing fluid provided by the invention has following beneficial effect: compared with traditional surfactant fracturing fluid, fracturing liquid provided by the invention just can obtain higher denseness and visco-elasticity under lower concentration, obtains better rheological and takes sand effect.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, existing following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
Embodiment 1
Present embodiments provide a kind of preparation method of supramolecule clean fracturing fluid, it comprises the following steps:
1) dimerization octadecyl amide or dimerization, the synthesis of trimerization mixing octadecyl amide
Get high purity dimeracid (carbon number is the stearic content >95% of dimerization of C36), or (carbon number is that the stearic content of dimerization of C36 accounts for 80% for dimerization and trimerization mixing acid, carbon number is that the stearic content of trimerization of C54 accounts for 20%) 100g joins N, N-dimethyl-1,3-propylene diamine (38.3g, 0.38mol), mix post-heating to 160-180 DEG C, insulation 3-8 hour, distill the water that reaction generates, reaction proceeds to terminate when acid number is less than 6; The N that distillation removing is unnecessary, N-dimethyl-1,3-propylene diamine, obtains high purity dimerization octadecyl amide or dimerization, trimerization mixing octadecyl amide.
2) synthesis of betaine type amphoteric surfac-tant
By sodium chloroacetate (15.7g, 0.135mol) join in 137mL water, Hybrid Heating is to 80 DEG C, then above-mentioned high-purity dimerization octadecyl amide or dimerization is added, trimerization mixing octadecyl amide 50g, reacts 4-6 hour at 70-80 DEG C, when the mass concentration of NaCl reaches 98% of theory, react complete, obtain the product that mass concentration is 30% active matter content; Final product structure may be the homologue shown in formula (a)-Shi (c):
3) preparation of supramolecule clean fracturing fluid
Component and code name as follows:
HMPAM: hydrophobically modified polyacrylamide, namely containing the anionic partially hydrolyzed polyacrylamide of hydrophobic group, the carbon number of its hydrophobic group is C16, and this hydrophobic group is connected with main chain by amido linkage; Molecular weight is 1,000,000;
DIBT: amide dimer CAB tensio-active agent (amide structure II, III): containing two hydrophilic radicals and a hydrophobic grouping (this hydrophobic grouping is that carbon number is 36 and contains the acyl group of two-CO-) in its molecular structure;
TDIBT: dimerization, melamine CAB mixed surfactant (amide structure II, III, IV mixture): by weight percentage, there is containing 80%DIBT and 20% in this amido propyl betaine mixture the amido propyl betaine of three hydrophilic radicals and a hydrophobic grouping (this hydrophobic grouping is that carbon number is 54 and contains the acyl group of three-CO-);
SDS: sodium lauryl sulphate;
ABS: Sodium dodecylbenzene sulfonate.
Process for preparation is as follows: after fully being dissolved by HMPAM, under agitation, adds the combination of one or more in DIBT, TDIBT, SDS, ABS in the ratio shown in table 1, forms the uniform liquid system of different series.
Embodiment 2
The present embodiment on Harke RS6000 rheometer, at 100s
-1under velocity of shear, the liquid viscosity of viscosity test difference composition at 70 DEG C, result (concentration is working substance content) as shown in table 1.
Table 1 viscosity test results
| Sequence number | Composition (by weight percentage) | Viscosity, mPas |
| 1 | 0.25％HMPAM | 5 |
| 2 | 0.2％DIBT | 4 |
| 3 | 0.25％HMPAM+0.2％DIBT | 70 |
| 4 | 0.2％DIBT+0.03％SDS | 20 |
| 5 | 0.2％DIBT+0.03％SDS+0.25％HMPAM | 90 |
| 6 | 0.15％HMPAM | 3 |
| 7 | 1％TDIBT+0.03％ABS | 31 |
| 8 | 1％TDIBT+0.03％ABS+0.15％HMPAM | 92 |
As can be seen from Table 1: in the uniform liquid of different series, the viscosity of the amphoterics containing two or three hydrophilic groups and the composite rear acquisition of anionic polymer containing hydrophobic group, viscosity sum when being used alone than the two is higher, can improve viscosity further with anion surfactant is composite.
Embodiment 3
The present embodiment is on Haake Mars rheometer, and the dynamic viscoelastic containing the composite sample of HMPAM and tensio-active agent in testing example 2, result is as shown in table 2.
Table 2 viscoelastic property (40 DEG C, 0.01rad/s)
| Sequence number | Composition, by weight percentage | G ' (storage modulus), Pa | G " (out-of-phase modulus), Pa |
| 1 | 0.25％HMPAM+0.2％DIBT | 0.42 | 0.31 |
| 2 | 0.2％DIBT+0.03％SDS+0.25％HMPAM | 0.36 | 0.21 |
| 3 | 1％TDIBT+0.03％ABS+0.15％HMPAM | 5.20 | 1.41 |
As can be seen from Table 2: when frequency is very low (0.1rad/s), the G ' (storage modulus) of composite sample (sequence number 1-3) is greater than G " (out-of-phase modulus); show it and there is higher viscoelastic property, can be favourable to taking grittiness.
Embodiment 4
The present embodiment has carried out static state further to the supramolecule clean fracturing fluid that embodiment 1 provides and has taken grittiness energy test experiments: 20% haydite (20/40 order haydite) is put into the graduated cylinder containing 100mL liquid, after dispersed with stirring is even, observe the settling time, and compare with conventional guanidine gum fracturing fluid, the results are shown in Table 3.
The preparation of conventional guanidine gum fracturing fluid: the amount of water is 100%, with the weight percent meter of water, add 0.25% hydroxypropyl guar (production of Kunshan Beijing-Kunming oilfield chemistry scientific and technological development company), 0.12% sodium carbonate and 4% Repone K stirring 5min in a certain amount of water after, add organic borate cross-linker (20%) in the ratio of crosslinking ratio 100:0.6, then after stirring 1min, form guanidine jelly glue.
Table 3 sand whole settling time (60 DEG C)
| Sequence number | Composition (by weight percentage) | The sand settling time (minute) |
| 1 | 0.25％HMPAM+0.2％DIBT | 32 |
| 2 | 0.2％DIBT+0.03％SDS+0.25％HMPAM | 40 |
| 3 | 1％TDIBT+0.03％ABS+0.15％HMPAM | 55 |
| 4 | 0.25% guanidine jelly glue | 21 |
As can be seen from Table 3: the supramolecule clean fracturing liquor ratio 0.25% guanidine jelly glue settling time of tradition provided by the invention is long, has better static state and takes sand effect.
Embodiment 5
The present embodiment carries out level of residue test experiments further to the supramolecule clean fracturing fluid that embodiment 1 provides, and carries out, the results are shown in Table 4 with reference to " SY/T5107-1995 aqueous fracturing fluid method of evaluating performance 6.6 fracturing fluid residue assay ".
Table 4 residue content
| Sequence number | Composition (by weight percentage) | Residue content (mg/L) |
| 1 | 0.25％HMPAM+0.2％DIBT | 28 |
| 2 | 0.2％DIBT+0.03％SDS+0.25％HMPAM | 31 |
| 3 | 1％TDIBT+0.03％ABS+0.15％HMPAM | 52 |
| 4 | 0.25% guanidine jelly glue | 280 |
As can be seen from Table 4: supramolecule clean fracturing fluid insolubles residue provided by the invention, far below traditional 0.25% guanidine jelly glue, belongs to clean fracturing fluid.
Claims (10)
1. a supramolecule clean fracturing fluid, by weight percentage, this fracturing liquid comprises amphoterics 0.1%-5%, and containing the anionic polymer 0.1%-0.8% of hydrophobic group, anion surfactant 0-2%, salt 0-4%, surplus is water, wherein:
Described amphoterics is have the amides amphoterics of two hydrophilic groups and a hydrophobic group, one or both the combination had in the amides amphoterics of three hydrophilic groups and a hydrophobic group.
2. supramolecule clean fracturing fluid according to claim 1, wherein: amphoterics has the molecular structure as shown in following formula I:
In formula I, x is 2 or 3;
R
1for carbon number is C24-54, and the acyl group containing x-CO-group;
R
2for the methylene group that carbon number is C2-5;
R
3for alkyl group ,-CH that carbon number is C1-4
2cH
2cOO-or-CH
2cH
2oH;
R
4for alkyl group ,-CH that carbon number is C1-4
2cH
2cOO-or-CH
2cH
2oH;
R
5for-CH
2-or-CH
2cH
2-.
3. supramolecule clean fracturing fluid according to claim 2, wherein: described R
1structure shown in having any one of following formula II-IV:
4. the supramolecule clean fracturing fluid according to any one of claim 1-3, wherein: described amphoterics comprises one or both the combination in DIBT, TDIBT;
Described DIBT is amide dimer CAB tensio-active agent; Described tensio-active agent contains two hydrophilic radicals and a hydrophobic grouping; Described hydrophobic grouping is that carbon number is 36 and contains the acyl group of two-CO-;
Described TDIBT is dimerization, melamine CAB mixed surfactant, and wherein, by weight percentage, described TDIBT consists of 80%DIBT and 20% amido propyl betaine; Described amido propyl betaine contains three hydrophilic radicals and a hydrophobic grouping; Described hydrophobic grouping is that carbon number is 54 and contains the acyl group of three-CO-.
5. supramolecule clean fracturing fluid according to claim 1, wherein: the described anionic polymer containing hydrophobic group is partially hydrolyzed polyacrylamide, and described polyacrylamide comprises hydrophobic grouping and anionic group, and its molecular weight is 10-500 ten thousand; Described hydrophobic grouping comprises the hydrocarbon chain group that carbon number is the straight or branched of C12-22, and described hydrophobic grouping is connected with main chain by amido linkage or ester bond; Described anionic group comprises carboxyl or sulfo group.
6. supramolecule clean fracturing fluid according to claim 1, wherein: with the weight percent meter of supramolecule clean fracturing fluid, the add-on of described anion surfactant is 0.01-2%, described anion surfactant comprises the combination of one or more in alkyl carboxylate, alkyl-sulphate, alkyl fatty polyoxyethylene ether sulfate, alkylsulfonate, alkylbenzene sulfonate, alkyl alcohol polyethers Di-sodium Sulfo-succinate Mono Est-er, and described alkyl carbon number is C8-22;
Preferably, described anion surfactant comprises the combination of one or more in sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, alkyl sodium sulfonate.
7. supramolecule clean fracturing fluid according to claim 1, wherein: with the weight percent meter of supramolecule clean fracturing fluid, the add-on of described salt is 0.1%-2%, and described salt comprises the combination of one or more in Repone K, ammonium chloride, quaternary ammonium salt.
8. prepare a method for the supramolecule clean fracturing fluid according to any one of claim 1-7, it comprises the following steps:
Join after amphoterics, anion surfactant and salt are mixed in the aqueous solution containing the anionic polymer of hydrophobic group, stir, obtain supramolecule clean fracturing fluid.
9. method according to claim 8, wherein: the preparation method of described amphoterics comprises the following steps:
Starting acid and organic amine are reacted 3-8 hour at 160-180 DEG C, obtains the first reaction intermediate;
Distill the water in the first reaction intermediate and remaining organic amine, obtain the second reaction intermediate;
Above-mentioned second reaction intermediate and the sodium chloroacetate aqueous solution are reacted 4-6 hour at 70-80 DEG C, obtains amphoterics; Wherein,
Described starting acid is dimerization stearic acid and/or trimerization stearic acid; Described organic amine is N, N-dimethyl-1,3-propylene diamine.
10. the application of supramolecule clean fracturing fluid in oil-gas field fracturing according to any one of claim 1-7.
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| CN117050742A (en) * | 2023-10-11 | 2023-11-14 | 东营科创生物化工有限公司 | Fracturing fluid based on modified polyacrylamide and preparation method thereof |
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