CN111592870A - Composite clean fracturing fluid, preparation method and application thereof in oil-gas field fracturing - Google Patents
Composite clean fracturing fluid, preparation method and application thereof in oil-gas field fracturing Download PDFInfo
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- CN111592870A CN111592870A CN202010446023.0A CN202010446023A CN111592870A CN 111592870 A CN111592870 A CN 111592870A CN 202010446023 A CN202010446023 A CN 202010446023A CN 111592870 A CN111592870 A CN 111592870A
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- 239000012530 fluid Substances 0.000 title claims abstract description 56
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000004094 surface-active agent Substances 0.000 claims abstract description 28
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001412 amines Chemical class 0.000 claims abstract description 10
- -1 alkyl amide amine Chemical class 0.000 claims abstract description 6
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000003973 alkyl amines Chemical group 0.000 claims abstract description 3
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims abstract description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 9
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 229920002125 Sokalan® Polymers 0.000 claims description 6
- 125000001165 hydrophobic group Chemical group 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 1
- 230000008719 thickening Effects 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002280 amphoteric surfactant Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229920005615 natural polymer Polymers 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 description 1
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 229920000420 Poly(styrene)-block-poly(acrylic acid) Polymers 0.000 description 1
- ABBQHOQBGMUPJH-UHFFFAOYSA-M Sodium salicylate Chemical compound [Na+].OC1=CC=CC=C1C([O-])=O ABBQHOQBGMUPJH-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- KNWLLDGCKIABQH-QXMHVHEDSA-N n,n-dimethyl-3-[[(z)-octadec-9-enoyl]amino]propan-1-amine oxide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCC[N+](C)(C)[O-] KNWLLDGCKIABQH-QXMHVHEDSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 229960004025 sodium salicylate Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
Classifications
-
- 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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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]
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the field of clean fracturing fluid, and particularly relates to a composite clean fracturing fluid containing a block type low molecular weight polymer and viscoelastic surfactant composite system, a preparation method and application thereof in oil and gas field fracturing, wherein the composite clean fracturing fluid comprises the following components in percentage by weight: 0.2-2% of viscoelastic amine oxide type surfactant; 0.2-2% of block polymer; 0-4% of salt; adding water to 100% of the rest. The viscoelastic amine oxide surfactant is alkyl amine oxide, alkyl amide amine oxide, oleic acid amide propyl amine oxide or erucic acid amide propyl amine oxide; the alkyl is a straight-chain alkyl with a carbon chain length of 18-24. The composite clean fracturing fluid has good salt resistance, high thickening property and good viscoelasticity.
Description
Technical Field
The invention belongs to the field of clean fracturing fluid, and particularly relates to a composite clean fracturing fluid containing a block type low molecular weight polymer and viscoelastic surfactant composite system, a preparation method and application thereof in oil and gas field fracturing.
Background
The reserves of low permeable layers of oil and gas fields in the world are rich, but the natural productivity is low or no natural productivity exists at all, the single-well yield is improved without fracturing yield increase transformation, and the economic development value is difficult to obtain. The application of the fracturing fluid technology to exploitation of such oil reservoirs is of great significance, and the fracturing fluid has the main functions of bringing the viscoelastic fluid carrying the propping agent into the fractured stratum and increasing the permeability so as to increase the yield of oil gas.
The residue after the hydration of the fracturing fluid directly influences the fracturing effect. The common fracturing fluid is macromolecular guar gum polysaccharide or a modified product thereof, and the residue content of the fracturing fluid is still relatively high. The residues are derived from insoluble substances of natural polymers and incomplete gel breaking products after the natural polymers are crosslinked with metals. The residues can cause difficult-to-recover damage to the permeability of the fractured supporting belt and the permeability of the stratum, and the fracturing stimulation effect is seriously influenced.
The clean fracturing fluid comprises a viscoelastic surfactant which is a result of molecular association aggregation, is applied to the fracturing fluid of an oil-gas field, changes an aggregation state after meeting oil, becomes spherical low-viscosity liquid, breaks gel automatically, and has little damage to a stratum because of being micromolecule without residues; the viscoelastic surfactant fracturing fluid is simple in site construction, does not need excessive equipment, crosslinking agents, gel breakers and other auxiliaries, and therefore has unique advantages. U.S. patent 5,551,516 discloses a viscoelastic surfactant based fracturing fluid in which water soluble inorganic salts such as potassium chloride or ammonium chloride and organic salts like sodium salicylate or alcohols are also used as stabilizers with cationic surfactants. U.S. Pat. nos. 5,964,295, 6,435,277, 6,412,561 disclose types of compositions and methods of use for using viscoelastic surfactant based fracturing fluids. U.S. Pat. No. 6,703,352 discloses a compound component of a single-chain amphoteric surfactant with a carbon chain length of 12-24, an inorganic salt and an organic salt. CN1285700C discloses a formulation of clean fracturing fluid, which is prepared by mixing unsaturated fatty acid salt with eighteen carbon atoms and saline water or mixing fatty acid with eighteen carbon atoms, inorganic base and saline water. CN1752173A discloses a clean fracturing fluid additive, which comprises long-carbon-chain alkyl quaternary ammonium salt, long-carbon-chain alkyl dimethyl amine oxide, salicylate, glycol ether, low-carbon alcohol and water. CN101775276A discloses a preparation method of a fracturing fluid that can be used under higher formation temperature conditions, which comprises a Gemini cationic surfactant, an amphoteric surfactant, an electrolyte salt, a counter-ion salt, a cosolvent, water, and the like. CN102181279A discloses a cationic quaternary ammonium salt type surfactant fracturing fluid with multiple hydrophilic groups.
Although viscoelastic surfactant fracturing fluids have many advantages of no residue, less damage to the formation, etc., they require a high use concentration (4%), and accordingly have a high cost, CN104694114A discloses a supramolecular cleaning fracturing fluid comprising an amphoteric surfactant, a hydrophobic anionic polymer, a supramolecular compound assembled by using intermolecular interaction force as a tool according to the principle of supramolecular self-assembly and components or building modules having specific structures and functions in a certain manner, and a supramolecular substance is a molecular aggregate formed based on intermolecular noncovalent bond interaction. However, this system is not very salt resistant and is sensitive to a range of surfactant concentrations. Thus, there is also a need for more effective and widely applicable systems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a composite clean fracturing fluid which is a composite system comprising a viscoelastic surfactant, a block polymer and the like, can realize higher thickening property, viscoelasticity and salt resistance under lower concentration, can reduce the using amount of the viscoelastic surfactant, and has ideal rheological property and sand carrying effect.
The invention also aims to provide a preparation method of the composite clean fracturing fluid.
The invention also aims to provide application of the composite clean fracturing fluid in fracturing of oil and gas fields.
In order to solve the technical problem, the invention is realized as follows:
a composite clean fracturing fluid comprises the following components in percentage by weight based on the total weight of the fracturing fluid:
0.2-2% of viscoelastic amine oxide type surfactant;
0.2-2% of block polymer;
0-4% of salt;
adding water to 100% of the rest.
Preferably, the viscoelastic surfactant of the present invention is a viscoelastic amine oxide surfactant.
Further, the viscoelastic amine oxide surfactant of the present invention is an alkylamine oxide, an alkylamide amine oxide, an oleamidopropyl amine oxide or an erucamidopropyl amine oxide. Further, the alkyl is a straight-chain alkyl with a carbon chain length of 18-24.
Further, the block-type polymer of the present invention is a diblock polymer formed of a hydrophobic group and a hydrophilic group.
Furthermore, the hydrophobic group is formed by copolymerizing polystyrene, and the molecular weight is 8000-30000; the hydrophilic group is polyacrylic acid, and the molecular weight is 8000-30000; the content of the hydrophilic groups accounts for 20-60% of the total molecular weight.
Furthermore, the salt of the invention is one or a mixture of more than two of KCl, ammonium chloride and quaternary ammonium salt.
Further, the viscoelastic surfactant, the block polymer, the salt and the water are mixed, dissolved and stirred uniformly according to the weight percentage to obtain the target product.
The composite clean fracturing fluid is applied to fracturing of oil and gas fields.
The fracturing fluid provided by the invention is a composite system comprising the viscoelastic amine oxide surfactant, the block polymer and the like, and compared with the traditional polymer fracturing fluid, the fracturing fluid provided by the invention can obtain higher thickening and viscoelasticity, salt resistance and better rheological property and sand carrying effect under a lower concentration.
Detailed Description
The technical solutions and the advantages of the present invention will be described in detail below with reference to specific examples, which are intended to help readers better understand the essence and features of the present invention, and are not intended to limit the implementable scope of the present invention.
Examples
The block polymer is PS-PAA, wherein PS is polystyrene and PAA is polyacrylic acid. The viscoelastic surfactant is oleamide propyl amine oxide (OAO) and erucic acid amide propyl amine oxide (EAO), and the liquid mixture ratio composition is shown in the following table 1. Wherein the molecular weights of PS10K-PAA10K are 10000 for PS and PAA respectively. PS10K-PAA3K has PS and PAA molecular weights of 10000 and 3000, respectively.
The polymer is solid effective content, the polymer is added into water for dispersion, stirred and dissolved, and then the viscoelastic surfactant (concentrated liquid with the effective content of 30%) is added, wherein the proportion in the formula is the effective content, and the balance of the residual water is 100%. After compounding, the liquid becomes gelatinous.
TABLE 1 composite fracturing fluid ratio
The viscosities of the different compositions described above were tested on an Anton Parr MRC302 rheometer. The results of the viscosity test at 90 ℃ are as follows:
TABLE 2 viscosity of the composite fracturing fluid (mPa.s)
As can be seen from the table above, the viscosity of the formula system can still be kept high when the formula system contains 2% KCl salt solution, and the salt resistance of the whole system is good. The viscosity of the liquid is greatly increased after the viscoelastic surfactant is added for compounding, and the viscosity of the 0.5 percent viscoelastic surfactant is below 5 mPa.s, so that the composite liquid system has obvious synergistic effect. In addition, carbon chain length erucic acid (C22) thickens more significantly than short chain oleic acid (C18). The standard requirement of the petroleum industry is 170 s-1The lower viscosity is more than 100 mPa.s, so that the system can meet the requirement of fracturing sand carrying.
The damage of the composite fracturing fluid to the rock core is determined by a rock core flowing experiment, and the rock core is 5.11cm long, 2.49cm in diameter, 10.2% in porosity and 0.70 millidarcy. The core is first vacuumized to saturate oil. The experiment was carried out at 80 ℃. The base line is established by forward flooding with saturated saline water, then the fracturing fluid for gel breaking is used for backward flooding for 2 hours, finally the saturated saline water is used for forward flooding, and the core retention permeability is measured at a stable flow speed and is shown in table 3. It can be seen that the core permeability rate is reduced by less than 2%.
Table 3 fracturing fluid core permeability test
| Fracturing fluid | Saturated brine permeability (mD) before passing through fracturing fluid | Saturated brine permeability (mD) after passing through fracturing fluid | Percent injury |
| Formulation 2 | 1.2 | 1.18 | 2% |
| Formulation 5 | 1.2 | 1.2 | 0% |
When the composite fracturing fluid is applied to oil-gas field fracturing, other application modes of the fracturing fluid in the prior art can be referred, and the composite fracturing fluid is not repeated.
In another aspect, the invention also provides a method for fracturing an oil and gas field, wherein the composite fracturing fluid is used. In addition to using the composite fracturing fluid of the present invention, other operations of the oil and gas field fracturing method may be performed with reference to the prior art in the field.
It should be understood that the detailed description and specific examples, while indicating the embodiments of the invention, are given by way of illustration only, not limitation, and various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. As long as the use requirements are met, the method is within the protection scope of the invention.
Claims (9)
1. The composite clean fracturing fluid is characterized by comprising the following components in percentage by weight:
0.2-2% of a viscoelastic surfactant;
0.2-2% of block polymer;
0-4% of salt;
adding water to 100% of the rest.
2. The composite clean fracturing fluid of claim 1, wherein: the viscoelastic surfactant is a viscoelastic amine oxide surfactant.
3. The composite clean fracturing fluid of claim 2, wherein: the viscoelastic amine oxide surfactant is alkyl amine oxide, alkyl amide amine oxide, oleic acid amide propyl amine oxide or erucic acid amide propyl amine oxide.
4. The composite clean fracturing fluid of claim 3, wherein: the alkyl is a straight-chain alkyl with a carbon chain length of 18-24.
5. The composite clean fracturing fluid of claim 4, wherein: the block polymer is a diblock polymer formed by a hydrophobic group and a hydrophilic group.
6. The composite clean fracturing fluid of claim 5, wherein: the hydrophobic group is formed by copolymerizing polystyrene, and the molecular weight is 8000-30000; the hydrophilic group is polyacrylic acid, and the molecular weight is 8000-30000; the content of the hydrophilic groups accounts for 20-60% of the total molecular weight.
7. The composite clean fracturing fluid of claim 6, wherein: the salt is one or a mixture of more than two of KCl, ammonium chloride and quaternary ammonium salt.
8. The preparation method of the composite clean fracturing fluid of any one of claims 1 to 6, characterized by comprising the following steps: and mixing, dissolving and uniformly stirring the viscoelastic surfactant, the block polymer, the salt and the water according to the weight percentage to obtain the target product.
9. Use of the composite clean fracturing fluid of claims 1-7 in fracturing of oil and gas fields.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010446023.0A CN111592870A (en) | 2020-05-25 | 2020-05-25 | Composite clean fracturing fluid, preparation method and application thereof in oil-gas field fracturing |
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| CN202010446023.0A CN111592870A (en) | 2020-05-25 | 2020-05-25 | Composite clean fracturing fluid, preparation method and application thereof in oil-gas field fracturing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480900A (en) * | 2020-12-16 | 2021-03-12 | 华东理工大学 | Viscoelastic long-carbon-chain amine oxide micelle fracturing fluid resistant to temperature of 150 DEG C |
| CN114427414A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | Method for improving fracturing validity of saline argillaceous dolomite oil reservoir and application of method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500177A (en) * | 2001-02-20 | 2004-05-26 | ���ǻ�ѧ��˾ | Hydraulic fracturing fluid comprising block copolymer contg. at least one water-soluble block and one hydrophobic block |
| US20060025321A1 (en) * | 2004-07-30 | 2006-02-02 | Treybig Duane S | Viscoelastic surfactant composition having improved rheological properties and method of using for treating subterranean formations |
| CN101636424A (en) * | 2007-01-19 | 2010-01-27 | 罗地亚运作公司 | Diblock copoplymer including units derived from styrene and units derived from acrylic acid |
| CN101842552A (en) * | 2007-10-31 | 2010-09-22 | 罗迪亚公司 | Addition of zwitterionic surfactant to water soluble polymer to increase the stability of the polymers in aqueous solutions containing salt and/or surfactants |
| CN101842551A (en) * | 2007-10-31 | 2010-09-22 | 罗迪亚公司 | Addition of nonionic surfactants to water soluble block copolymers to increase the stability of the copolymer in aqueous solutions containing salt and/or surfactants |
| US20110284228A1 (en) * | 2010-05-19 | 2011-11-24 | Baker Hughes Incorporated | Increasing the Viscosity of Viscoelastic Fluids |
| CN103261365A (en) * | 2010-12-16 | 2013-08-21 | 阿克佐诺贝尔化学国际公司 | Compositions of viscoelastic surfactant and hydrophobically modified polymer as aqueous thickeners |
| CN104371698A (en) * | 2014-10-31 | 2015-02-25 | 江南大学 | Clean high-temperature fracturing fluid containing erucylamidoammonium oxide |
| CN106479476A (en) * | 2016-09-28 | 2017-03-08 | 西安石油大学 | A kind of clean fracturing fluid and preparation method thereof |
| CN107033867A (en) * | 2017-04-12 | 2017-08-11 | 西安石油大学 | Nano-cellulose and viscoelastic surfactants fracturing fluid and preparation method thereof and its application |
-
2020
- 2020-05-25 CN CN202010446023.0A patent/CN111592870A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500177A (en) * | 2001-02-20 | 2004-05-26 | ���ǻ�ѧ��˾ | Hydraulic fracturing fluid comprising block copolymer contg. at least one water-soluble block and one hydrophobic block |
| US20060025321A1 (en) * | 2004-07-30 | 2006-02-02 | Treybig Duane S | Viscoelastic surfactant composition having improved rheological properties and method of using for treating subterranean formations |
| CN101636424A (en) * | 2007-01-19 | 2010-01-27 | 罗地亚运作公司 | Diblock copoplymer including units derived from styrene and units derived from acrylic acid |
| CN101842552A (en) * | 2007-10-31 | 2010-09-22 | 罗迪亚公司 | Addition of zwitterionic surfactant to water soluble polymer to increase the stability of the polymers in aqueous solutions containing salt and/or surfactants |
| CN101842551A (en) * | 2007-10-31 | 2010-09-22 | 罗迪亚公司 | Addition of nonionic surfactants to water soluble block copolymers to increase the stability of the copolymer in aqueous solutions containing salt and/or surfactants |
| US20110284228A1 (en) * | 2010-05-19 | 2011-11-24 | Baker Hughes Incorporated | Increasing the Viscosity of Viscoelastic Fluids |
| CN103261365A (en) * | 2010-12-16 | 2013-08-21 | 阿克佐诺贝尔化学国际公司 | Compositions of viscoelastic surfactant and hydrophobically modified polymer as aqueous thickeners |
| CN104371698A (en) * | 2014-10-31 | 2015-02-25 | 江南大学 | Clean high-temperature fracturing fluid containing erucylamidoammonium oxide |
| CN106479476A (en) * | 2016-09-28 | 2017-03-08 | 西安石油大学 | A kind of clean fracturing fluid and preparation method thereof |
| CN107033867A (en) * | 2017-04-12 | 2017-08-11 | 西安石油大学 | Nano-cellulose and viscoelastic surfactants fracturing fluid and preparation method thereof and its application |
Non-Patent Citations (2)
| Title |
|---|
| 吴伟等: "一种高温嵌段聚合物水基压裂液的室内研究", 《钻井液与完井液》 * |
| 钱建华等: "《精细化学品化学》", 31 December 2010, 东北大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427414A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | Method for improving fracturing validity of saline argillaceous dolomite oil reservoir and application of method |
| CN114427414B (en) * | 2020-09-16 | 2024-05-17 | 中国石油化工股份有限公司 | Method for improving fracturing validity of inter-salt shale dolomite oil reservoir and application thereof |
| CN112480900A (en) * | 2020-12-16 | 2021-03-12 | 华东理工大学 | Viscoelastic long-carbon-chain amine oxide micelle fracturing fluid resistant to temperature of 150 DEG C |
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