CN115124982B - Steering acid and preparation method and application thereof - Google Patents
Steering acid and preparation method and application thereof Download PDFInfo
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- CN115124982B CN115124982B CN202110344462.5A CN202110344462A CN115124982B CN 115124982 B CN115124982 B CN 115124982B CN 202110344462 A CN202110344462 A CN 202110344462A CN 115124982 B CN115124982 B CN 115124982B
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- diverting acid
- tackifier
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- 239000002253 acid Substances 0.000 title claims abstract description 136
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000005260 corrosion Methods 0.000 claims abstract description 33
- 230000007797 corrosion Effects 0.000 claims abstract description 33
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 27
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 27
- -1 iron ion Chemical class 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003112 inhibitor Substances 0.000 claims abstract description 20
- 239000003093 cationic surfactant Substances 0.000 claims abstract description 15
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 13
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims abstract description 13
- 229960003237 betaine Drugs 0.000 claims abstract description 13
- 239000002888 zwitterionic surfactant Substances 0.000 claims abstract description 13
- IPTLKMXBROVJJF-UHFFFAOYSA-N azanium;methyl sulfate Chemical compound N.COS(O)(=O)=O IPTLKMXBROVJJF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 230000005764 inhibitory process Effects 0.000 claims abstract description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 24
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 19
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 12
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- SMWDFEZZVXVKRB-UHFFFAOYSA-N anhydrous quinoline Natural products N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 9
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- UCXOJWUKTTTYFB-UHFFFAOYSA-N antimony;heptahydrate Chemical compound O.O.O.O.O.O.O.[Sb].[Sb] UCXOJWUKTTTYFB-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 235000010352 sodium erythorbate Nutrition 0.000 claims description 8
- 239000004320 sodium erythorbate Substances 0.000 claims description 8
- RBWSWDPRDBEWCR-RKJRWTFHSA-N sodium;(2r)-2-[(2r)-3,4-dihydroxy-5-oxo-2h-furan-2-yl]-2-hydroxyethanolate Chemical compound [Na+].[O-]C[C@@H](O)[C@H]1OC(=O)C(O)=C1O RBWSWDPRDBEWCR-RKJRWTFHSA-N 0.000 claims description 8
- HSEMFIZWXHQJAE-UHFFFAOYSA-N Amide-Hexadecanoic acid Natural products CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 claims description 7
- 239000004970 Chain extender Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 4
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- YWOAEHAIHZVTFA-UHFFFAOYSA-N methyl sulfate;trimethyl-[3-(octadecanoylamino)propyl]azanium Chemical compound COS([O-])(=O)=O.CCCCCCCCCCCCCCCCCC(=O)NCCC[N+](C)(C)C YWOAEHAIHZVTFA-UHFFFAOYSA-N 0.000 claims description 4
- NQNOMXXYKHWVKR-UHFFFAOYSA-N methylazanium;sulfate Chemical compound NC.NC.OS(O)(=O)=O NQNOMXXYKHWVKR-UHFFFAOYSA-N 0.000 claims description 4
- CIWAOCMKRKRDME-UHFFFAOYSA-N tetrasodium dioxido-oxo-stibonatooxy-lambda5-stibane Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Sb]([O-])(=O)O[Sb]([O-])([O-])=O CIWAOCMKRKRDME-UHFFFAOYSA-N 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 125000004386 diacrylate group Chemical group 0.000 claims description 3
- QIVLQXGSQSFTIF-UHFFFAOYSA-M docosyl(trimethyl)azanium;methyl sulfate Chemical compound COS([O-])(=O)=O.CCCCCCCCCCCCCCCCCCCCCC[N+](C)(C)C QIVLQXGSQSFTIF-UHFFFAOYSA-M 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Natural products OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 2
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-isoascorbic acid Chemical compound OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 claims description 2
- 235000010350 erythorbic acid Nutrition 0.000 claims description 2
- 229940026239 isoascorbic acid Drugs 0.000 claims description 2
- 239000012747 synergistic agent Substances 0.000 claims description 2
- MPNXSZJPSVBLHP-UHFFFAOYSA-N 2-chloro-n-phenylpyridine-3-carboxamide Chemical compound ClC1=NC=CC=C1C(=O)NC1=CC=CC=C1 MPNXSZJPSVBLHP-UHFFFAOYSA-N 0.000 claims 1
- 125000005395 methacrylic acid group Chemical group 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 10
- 230000020477 pH reduction Effects 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 239000004094 surface-active agent Substances 0.000 description 27
- 238000003756 stirring Methods 0.000 description 24
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- RRHXZLALVWBDKH-UHFFFAOYSA-M trimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)OCC[N+](C)(C)C RRHXZLALVWBDKH-UHFFFAOYSA-M 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- MEPGZPGBXBGJNN-UHFFFAOYSA-M methyl sulfate;octadecanamide;trimethyl(propyl)azanium Chemical compound COS([O-])(=O)=O.CCC[N+](C)(C)C.CCCCCCCCCCCCCCCCCC(N)=O MEPGZPGBXBGJNN-UHFFFAOYSA-M 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- LYRJXKILQROVJR-UHFFFAOYSA-N C(C1=CC=CC=C1)N1C2=CC=CC=C2C=CC1.Cl Chemical compound C(C1=CC=CC=C1)N1C2=CC=CC=C2C=CC1.Cl LYRJXKILQROVJR-UHFFFAOYSA-N 0.000 description 1
- ULKBWWZLNAWLNA-UHFFFAOYSA-M S(=O)(=O)(OC)[O-].C(CC)[N+](C)(C)C.C(CCCCCCCCCCCCCCCCC)[NH-].C(CC)[N+](C)(C)C Chemical compound S(=O)(=O)(OC)[O-].C(CC)[N+](C)(C)C.C(CCCCCCCCCCCCCCCCC)[NH-].C(CC)[N+](C)(C)C ULKBWWZLNAWLNA-UHFFFAOYSA-M 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- DZWAVKNVFHXLJL-UHFFFAOYSA-N butyl-(2,2-dihydroxyethyl)-octadecylazanium bromide Chemical compound [Br-].C(CCCCCCCCCCCCCCCCC)[NH+](CC(O)O)CCCC DZWAVKNVFHXLJL-UHFFFAOYSA-N 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229960002413 ferric citrate Drugs 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NPFOYSMITVOQOS-UHFFFAOYSA-K iron(III) citrate Chemical compound [Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NPFOYSMITVOQOS-UHFFFAOYSA-K 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- DDQQYVQOZWBPES-UHFFFAOYSA-K sodium;2-[bis(carboxylatomethyl)amino]acetate;iron(2+) Chemical compound [Na+].[Fe+2].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DDQQYVQOZWBPES-UHFFFAOYSA-K 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Detergent Compositions (AREA)
Abstract
The invention provides steering acid and a preparation method and application thereof. The diverting acid comprises, based on 100% of the total mass of the diverting acid: 2% -4% of betaine zwitterionic surfactant and 2% -4% of ammonium methyl sulfate cationic surfactant; 0.04% -0.08% of tackifier; 1% -3% of corrosion inhibitor; 1% -2% of corrosion inhibition synergist; 1% -3% of iron ion stabilizer; 20% hydrogen chloride; the balance being water. The invention also provides a preparation method of the steering acid. The invention further provides application of the steering acid in plugging construction. The maximum plugging pressure of the diverting acid provided by the invention can reach 15MPa, the plugging duration can reach 40min-50min, the maximum diversion pressure of the reservoir with the level difference of 50-60 times of permeability can reach 12.9MPa, and the acidification transformation effect of the hypotonic reservoir can reach more than 50%.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to steering acid and a preparation method and application thereof.
Background
Turning to acid acidizing process technology has been widely used in carbonate reservoirs since the beginning of the century. The method is mainly applied to large-scale fields such as Tarim oil fields, southwest oil fields, changqing oil fields, southwest authorities of medium petrochemical industry and the like of medium petroleum, and mainly solves the problems of deep well resistance reduction performance, high-temperature rheological performance, residue injury performance, internal permeability level difference (the ratio of high permeability level difference: high permeability value to low permeability value of a strong non-average reservoir), plugging steering performance and the like of steering acid at present. With the key of oil and gas field exploration and development, the method gradually turns to a strong heterogeneous fracture-cavity carbonate reservoir, and the current turning acid system is difficult to meet the requirement of acid fracturing modification of the reservoir with the permeability level difference of more than 50 times. The permeability level difference of partial wells in the high-abrasion area of the southwest oil-gas field division of China is up to 50-95 times, the permeability level difference of partial wells in the Sichuan-western area of the southwest oil-gas division of China is more than 55 times, and for the strong heterogeneous reservoirs, the current steering acid system has limited plugging performance, the steering acid cannot be plugged and turned to the hypotonic reservoir, and the yield increasing and transformation effects of the hypotonic region are limited.
The key points of the current research are mainly in the aspects of resistance reduction performance, temperature resistance, low injury performance and the like of steering acid. As CN102443386a discloses an energy-increasing diverting acid system formula: hydrochloric acid, corrosion inhibitor, steering agent, foam booster and iron ion stabilizer, and the reduction resistance is 40-50%. CN107325806a discloses a diverting acid with a resistivity of 40%. The acidifying diverter octadecyl butyl dihydroxyethyl ammonium bromide disclosed in CN104402740a, and the self diverting acid system disclosed in CN103820098A are all harmless to the reservoir. Development and application of CT high temperature diversion acids (Liu Youquan, wang Xiaogong, wang Chuan, etc. oil and gas chemical industry, 2011,040 (006): 614-615.) have reported that plugging diversion can be achieved for carbonate reservoirs within 40 times of the permeability level difference, and low permeability reservoirs are modified.
From the above analysis of the current situation of diverting acid, it can be seen that only CN102585797a reports that the length of acid etching crack can be greatly increased to enable the reservoir to be uniformly acidified, and "development and application of CT high temperature diverting acid" reports that plugging diverting can be performed on carbonate reservoir with a permeability level difference of 40 times or less, but diverting acid for strongly heterogeneous reservoir with a permeability level difference of 50 times or more is not disclosed.
Disclosure of Invention
In order to solve the above problems, the present invention provides a diverting acid, a preparation method and an application thereof. The diverting acid has stronger plugging capability and is suitable for plugging construction of a strong heterogeneous reservoir with a permeability level difference of more than 50 times.
In order to achieve the above object, the present invention provides a diverting acid, wherein the diverting acid comprises, based on 100% of the total mass of the diverting acid: 2-4% of betaine zwitterionic surfactant, 2-4% of ammonium methyl sulfate cationic surfactant, 0.04-0.08% of tackifier, 1-3% of corrosion inhibitor, 1-2% of corrosion inhibition synergist, 1-3% of iron ion stabilizer, 10-28% of hydrogen chloride and the balance of water.
In a specific embodiment of the invention, the diverting acid can utilize the difference of the viscosity-changing process of the betaine zwitterionic surfactant and the ammonium methyl sulfate cationic surfactant to make the diverting acid become viscous and increase the viscosity in the process of reacting with a reservoir and the reaction is finished until the acid is remained. Specifically, after the diverting acid is injected into the stratum, the diverting acid can react with calcium carbonate in the stratum to generate calcium ions, and under the conditions that the concentration of the acid (hydrogen chloride) reacts to 10% -12% and the calcium ions exist, the betaine zwitterionic surfactant firstly forms worm-shaped aggregates to reach the viscosity of a variable viscosity peak value, and the cracks are plugged for one time; as the concentration of the acid (hydrogen chloride) is continuously consumed to 0% -4%, the viscosity of the betaine zwitterionic surfactant is continuously reduced, the plugging performance is lost, at the moment, the methyl ammonium sulfate cationic surfactant forms worm-shaped aggregates under the condition that the concentration of the acid is 0% -4% and calcium ions exist, the viscosity of the viscosity-variable peak is reached, and secondary plugging is carried out on cracks, so that continuous plugging is formed on reservoir cracks. In some embodiments, the diverting acid has strong plugging properties, and its maximum plugging pressure may reach 15MPa, and the plugging duration may reach 40min-50min.
In the above diverting acid, preferably, the betaine-type zwitterionic surfactant includes hexadecylamide propyl hydroxysulfobetaine and/or erucamide propyl hydroxysulfobetaine.
In the above diverting acid, preferably, the ammonium methyl sulfate-based cationic surfactant includes stearamidopropyl trimethyl ammonium methyl sulfate and/or docosyl trimethyl ammonium methyl sulfate.
In the above diverting acid, preferably, the tackifier comprises a polyacrylamide derivative. The viscosity average molecular weight of the polyacrylamide derivative is generally controlled to be 1000 ten thousand to 1200 ten thousand.
In a specific embodiment of the invention, the tackifier generally comprises a long-chain alkyl monomer which can generate a synergetic hydrophobic association effect with a long-chain hydrophobic end of the ammonium methyl sulfate surfactant, so that the viscoelasticity of a steering acid system is greatly enhanced, the friction of a steering acid pipeline is remarkably reduced, and the on-site resistance reduction rate can reach more than 65%. The polyacrylamide derivative can be obtained by reacting acrylamide, methacryloyloxyethyl trimethyl ammonium chloride with a chain extender; the chain extender may include polyethylene glycol diacrylate. In some embodiments, the method of preparing the polyacrylamide derivative may include: mixing methacryloxyethyl trimethyl ammonium chloride, acrylamide and chain extender according to a certain mass ratio (preferably 8.5:1:0.5) to form raw materials, placing the raw materials into a reaction container, regulating pH value to be close to neutral (pH value is preferably 6-7), and then adding (NH 4) accounting for 0.02% of the total weight of the raw materials 2 S 2 O 8 -NaHSO 3 Sealing, reacting at 45 ℃ for 4 hours to obtain colloid, drying and crushing to obtain the tackifier.
In the above diverting acid, the corrosion inhibitor is typically a high temperature corrosion inhibitor, preferably the corrosion inhibitor comprises a quaternary ammonium salt; the molecular weight of the quaternary ammonium salt can be controlled to be 500-1000.
In the above diverting acid, preferably, the quaternary ammonium salt comprises a quinoline quaternary ammonium salt and/or a mannich base quaternary ammonium salt.
In the above diverting acid, the corrosion-inhibiting synergist is typically the high temperature corrosion-inhibiting synergist, preferably the high temperature corrosion-inhibiting synergist comprises dimethylformamide and/or pyroantimonate, which may comprise potassium pyroantimonate and/or sodium pyroantimonate.
In the above diverting acid, preferably, the iron ion stabilizer includes one or a combination of two or more of citric acid, sodium nitrilotriacetate, and sodium erythorbate.
In a specific embodiment of the present invention, the diverting acid may comprise, based on 100% of the total mass of the diverting acid: 4% of betaine zwitterionic surfactant, 3% of ammonium methyl sulfate cationic surfactant, 0.04% of tackifier, 3% of corrosion inhibitor, 1% of corrosion inhibition synergist, 1% of iron ion stabilizer, 20% of hydrogen chloride and the balance of water.
In a specific embodiment of the present invention, the diverting acid may comprise, based on 100% of the total mass of the diverting acid: 2% -4% of erucamide propyl hydroxysulfobetaine, 2% -4% of stearamidopropyl trimethyl ammonium methyl sulfate, 0.04% -0.08% of tackifier, 1% -3% of Mannich base quaternary ammonium salt, 1% -2% of dimethylformamide, 1% -3% of isoascorbic acid, 10% -28% of hydrogen chloride (preferably 20%) and the balance of water; wherein, the tackifier can be polyacrylamide derivative obtained by the reaction of acrylamide, methacryloxyethyl trimethyl ammonium chloride and a chain extender.
The invention also provides a preparation method of the steering acid, which comprises the following steps: mixing hydrogen chloride, a corrosion inhibitor, a corrosion inhibition synergistic agent and an iron ion stabilizer, sequentially adding a tackifier, a betaine amphoteric ion surfactant, a methyl ammonium sulfate cationic surfactant and water, and uniformly mixing to obtain the steering acid.
In a specific embodiment of the present invention, the above-mentioned method for preparing a diverting acid may further include an operation for preparing a tackifier, the preparation process of the tackifier including: and (3) reacting acrylamide, methacryloyloxyethyl trimethyl ammonium chloride with a chain extender to obtain the tackifier.
The invention further provides application of the steering acid in plugging construction. The maximum plugging pressure of the diverting acid can reach 15MPa, the plugging duration can reach 40min-50min, the maximum diversion pressure of the reservoir with the level difference of 50-60 times of permeability can reach 12.9MPa, and the acidification transformation effect of the reservoir with low permeability can reach more than 50%.
The invention has the beneficial effects that:
the invention has strong steering acid plugging capability, high plugging time duration and obvious yield increasing and reconstruction effects on hypotonic regions, and is suitable for plugging construction of a strong heterogeneous reservoir with a permeability level difference of more than 50 times.
Drawings
FIG. 1 is a graph showing the concentration consumption of acid (hydrogen chloride) versus viscosity change in test example 2.
Detailed Description
The technical solution of the present invention will be described in detail below for a clearer understanding of technical features, objects and advantageous effects of the present invention, but should not be construed as limiting the scope of the present invention.
In the following examples, the manufacturer of the quinoline quaternary ammonium salt used is Hubei jin Leda chemical industry Co., ltd, and the product model is 1-benzyl quinoline chloride; the manufacturer of the Mannich base quaternary ammonium salt is Chengdu Technical Co., ltd, and the model is CT1-3D. The hydrogen chloride was added as a hydrochloric acid solution with a mass concentration of 37%.
Example 1
This example provides a diverting acid, to a total mass of 100% of the diverting acid, comprising: 20% of hydrogen chloride, 3% of Mannich base quaternary ammonium salt, 1% of dimethylformamide, 1% of sodium erythorbate, 0.04% of tackifier, 4% of erucamide propyl hydroxysulfobetaine surfactant, 3% of stearamide propyl trimethyl ammonium methyl sulfate surfactant and the balance of water.
Wherein, the tackifier is polyacrylamide derivative, and the preparation method is as follows: based on the mass of solute, the aqueous solution of methacryloyloxyethyl trimethyl ammonium chloride, acrylamide and polyethylene glycol diacrylate is prepared according to the weight ratio of 8.5:1: mixing at a mass ratio of 0.5 to form a raw material mixture, placing in a reaction vessel, adjusting pH to 6-7, and adding (NH 4) 0.02% of the total weight of the raw material mixture 2 S 2 O 8 -NaHSO 3 Sealing the mouth of the container, placing the container in a constant-temperature water bath at 45 ℃ for reaction, and stopping the reaction after 4 hours to obtain the colloid. Drying colloid at 80deg.C under 100KPa vacuum degree for 10 hr, and pulverizing to obtain tackifier.
The procedure for the preparation of the diverting acid of this example is as follows:
sequentially adding hydrochloric acid, long-chain Mannich base quaternary ammonium salt, dimethylformamide and sodium erythorbate into a liquid preparation container, uniformly stirring, and adding a tackifier in the stirring process; then adding erucamide propyl hydroxysulfobetaine surfactant, and continuously stirring for 10min; and adding the ammonium stearamide propyl trimethyl ammonium methyl sulfate surfactant and water, stirring for 20min, and uniformly mixing to obtain steering acid.
Example 2
This example provides a diverting acid, to a total mass of 100% of the diverting acid, comprising: 20% hydrogen chloride, 2% quinoline quaternary ammonium salt, 2% potassium pyroantimonate, 3% citric acid, 0.06% tackifier, 3% erucamide propyl hydroxysulfobetaine surfactant, 3% ammonium behenyl trimethyl sulfate and the balance of water. The tackifier was prepared in the same manner as in example 1.
The procedure for the preparation of the diverting acid of this example is as follows:
sequentially adding hydrochloric acid, quinoline quaternary ammonium salt high-temperature corrosion inhibitor, potassium pyroantimonate and citric acid into a liquid preparation container, uniformly stirring, and adding a tackifier in the stirring process; then adding erucamide propyl hydroxysulfobetaine surfactant, and continuously stirring for 10min; and adding the docosahexaenoic acid trimethyl ammonium sulfate surfactant and water, stirring for 20min, and uniformly mixing to obtain steering acid.
Example 3
This example provides a diverting acid, to a total mass of 100% of the diverting acid, comprising: 20% of hydrogen chloride, 2% of Mannich base quaternary ammonium salt, 1% of sodium pyroantimonate, 2% of sodium erythorbate, 0.08% of tackifier, 4% of cetyl amide propyl hydroxysulfobetaine surfactant, 2% of stearic amide propyl trimethyl ammonium methyl sulfate surfactant and the balance of water. The tackifier was prepared in the same manner as in example 1.
The procedure for the preparation of the diverting acid of this example is as follows:
sequentially adding hydrochloric acid, a Mannich base quaternary ammonium salt high-temperature corrosion inhibitor, sodium pyroantimonate and sodium erythorbate into a liquid preparation container, uniformly stirring, and adding a tackifier in the stirring process; then adding hexadecylamide propyl hydroxysulfobetaine surfactant, and continuously stirring for 10min; and adding the ammonium stearamide propyl trimethyl ammonium methyl sulfate surfactant and water, stirring for 20min, and uniformly mixing to obtain steering acid.
Example 4
This example provides a diverting acid, to a total mass of 100% of the diverting acid, comprising: 20% of hydrogen chloride, 3% of Mannich base quaternary ammonium salt, 2% of dimethylformamide, 1% of sodium nitrilotriacetate, 0.06% of tackifier, 2% of erucamide propyl hydroxysulfobetaine surfactant, 4% of behenyl trimethyl ammonium methyl sulfate surfactant and the balance of water. The tackifier was prepared in the same manner as in example 1.
The procedure for the preparation of the diverting acid of this example is as follows:
sequentially adding hydrochloric acid, a Mannich base quaternary ammonium salt high-temperature corrosion inhibitor, dimethylformamide and sodium nitrilotriacetate into a liquid preparation container, uniformly stirring, and adding a tackifier in the stirring process; then adding erucamide propyl hydroxysulfobetaine surfactant, and continuously stirring for 10min; and adding the docosahexaenoic acid trimethyl ammonium sulfate surfactant and water, stirring for 20min, and uniformly mixing to obtain steering acid.
Example 5
This example provides a diverting acid, to a total mass of 100% of the diverting acid, comprising: 20% hydrogen chloride, 3% quinoline quaternary ammonium salt, 1% dimethylformamide, 1% sodium erythorbate, 0.08% tackifier, 3% hexadecylamide propyl hydroxysulfobetaine surfactant, 4% stearylamide propyl trimethyl ammonium methyl sulfate surfactant and the balance of water. The tackifier was prepared in the same manner as in example 1.
The procedure for the preparation of the diverting acid of this example is as follows:
sequentially adding hydrochloric acid, quinoline quaternary ammonium salt high-temperature corrosion inhibitor, dimethylformamide and sodium erythorbate into a liquid preparation container, uniformly stirring, and adding a tackifier in the stirring process; then adding hexadecylamide propyl hydroxysulfobetaine surfactant, and continuously stirring for 10min; and adding the ammonium stearamide propyl trimethyl ammonium methyl sulfate surfactant and water, stirring for 20min, and uniformly mixing to obtain steering acid.
Comparative example 1
This comparative example provides a diverting acid free of a cationic surfactant of the ammonium methyl sulfate type and a tackifier, the diverting acid comprising, based on 100% of the total mass of the diverting acid: 15% of hydrogen chloride, 2% of quinoline quaternary ammonium salt corrosion inhibitor, 1% of potassium pyroantimonate corrosion inhibition synergist, 1% of sodium iron nitrilotriacetate stabilizer, 4% of erucic acid amide propyl hydroxysulfobetaine surfactant and the balance of water.
The procedure for the preparation of the diverting acid of this comparative example is as follows:
sequentially adding hydrochloric acid, quinoline quaternary ammonium salt high-temperature corrosion inhibitor, potassium pyroantimonate and sodium nitrilotriacetate into a liquid preparation container, and uniformly stirring; and then adding erucamide propyl hydroxysulfobetaine surfactant, and continuously stirring for 10min to obtain steering acid.
Comparative example 2
This comparative example provides a diverting acid free of a cationic surfactant of the ammonium methyl sulfate type and a tackifier, the diverting acid comprising, based on 100% of the total mass of the diverting acid: 20% of hydrogen chloride, 3% of Mannich base quaternary ammonium salt corrosion inhibitor, 1% of dimethylformamide corrosion inhibition synergist, 2% of ferric citrate ion stabilizer, 6% of hexadecylamide propyl hydroxysulfobetaine surfactant and the balance of water.
The procedure for the preparation of the diverting acid of this comparative example is as follows:
sequentially adding hydrochloric acid, a Mannich base quaternary ammonium salt high-temperature corrosion inhibitor, dimethylformamide and citric acid into a liquid preparation container, and uniformly stirring; then adding hexadecylamide propyl hydroxysulfobetaine surfactant, and stirring for 10min to obtain steering acid.
Test example 1
The diverting acids obtained in examples 1-5 and comparative examples 1-2 were subjected to performance tests of parameters such as continuous plugging pressure, continuous plugging time, diverting pressure, resistivity reduction, and acidizing modification results of hypotonic reservoirs, and the test results are shown in table 1.
The continuous plugging pressure and continuous plugging effort are determined by a plugging experimental method: the core is put into a holder, ring pressure is added to 20MPa, and initial permeability is tested at normal temperature with a flow rate of 0.5 ml/min. Then heating to 150 ℃, starting constant-flow acid injection at the speed of 0.5ml/min, recording displacement pressure in real time in the acid injection passing vehicle, observing the maximum amplitude of pressure rise, stopping acid injection when the acid injection pressure is reduced to be close to the initial acid injection pressure, and recording the displacement maximum pressure as continuous plugging pressure and the time from starting acid injection to stopping acid injection as continuous plugging time.
The steering pressure and the acidification effect are tested by adopting a 7.10 double-core acidification experimental method in the standard Q/SY17003-2017 of the middle petroleum group company for the technical specification of viscoelastic surfactant self-steering acid for carbonate reservoir transformation, wherein the breakthrough pressure of the high-permeability core is the steering pressure of double-core acidification. The specific method comprises the following steps:
selecting two cores with different permeability, respectively loading into a holder, adding ring pressure to about 15MPa, respectively testing initial permeability and low permeability core permeability K at normal temperature 1 High permeability of core K 2 。
And heating (90 ℃), and keeping small flow (0.5 mL/min) in the heating process to positively inject standard saline.
After the temperature rises to 90 ℃, an emptying valve is opened, the water of the liquid injection pipeline is replaced by steering acid, so that the steering acid is as close to a rock core as possible, then the emptying is closed, constant flow acid injection at the speed of 0.5mL/min is started, the displacement pressure is recorded in real time in the acid injection process, the maximum amplitude (steering pressure) of pressure rise is observed, and when the pressure is reduced to below half of the maximum pressure, the rock core is regarded as broken through, and the acid injection is stopped.
The resistivity is tested by referring to the 7.12-percent determination of the resistivity in the fracturing fluid chamber in the water-based fracturing fluid evaluation method of the oil industry standard SY/T5107-2016.
TABLE 1
As can be seen from Table 1, the maximum plugging pressure of the diverting acid provided by the invention reaches 15MPa, the plugging time reaches 40min-50min, the maximum diversion pressure of the reservoir with the level difference of 50-60 times of permeability can reach 12.9MPa, and the acidification transformation effect of the reservoir with low permeability can reach more than 50%. In contrast, the plugging pressure, the plugging time, the plugging pressure, the resistivity reduction and the acidification modification effect of the diverting acid of the comparative examples 1-2 are all obviously lower than the corresponding plugging parameters in the diverting acid of the examples 1-5, which indicates that the synergistic effect of the tackifier and the ammonium methyl sulfate cationic surfactant has obvious improvement effect on the plugging performance of the diverting acid.
Test example 2
This test example provides a viscosity-changing peak viscosity measurement of the diverting acid prepared in examples 1-5 as a function of acid (hydrogen chloride) concentration to form vermiform aggregates, using the method described in the "7.2" peak viscosity measurement "of viscoelastic surfactant for carbonate reservoir modification technical Specification", of the middle Petroleum group company standard Q/SY17003-2017, the specific method being:
4000mL of the steering acid prepared in one of examples 1 to 5 was taken, 10 beakers of 5L were taken, 400mL of the self-steering acid was poured into each beaker, and then 12.03g, 24.07g, 36.10g, 48.13g, 60.17g, 72.20g, 84.23g, 96.26g, 108.30g and 120.33g of calcium carbonate powder were added to each beaker, respectively, at a rate controlled so that no foam overflowed from the beaker, and no bubbles were generated until the reaction was completed. Testing the acid solution after becoming sticky for 170s -1 The maximum value measured is the peak viscosity, and FIG. 1 is a graph showing the concentration consumption of acid (hydrogen chloride) and the viscosity change.
As can be seen from FIG. 1, the viscosity of the acid solution becomes viscous and peaks twice when the concentration of hydrogen chloride is consumed to 8-10% and 16-20%, respectively. Under the conditions that the concentration of acid (hydrogen chloride) reacts to 10% -12% (namely, the concentration of hydrogen chloride is consumed to about 8% -10%), and acid liquor reacts with a bottom layer to generate calcium ions, the betaine zwitterionic surfactant firstly forms worm-shaped aggregates to reach viscosity of a viscosity-changing peak value, and cracks are plugged for one time; along with the continuous consumption of the concentration of acid (hydrogen chloride) to 0% -4% (namely, the consumption of the concentration of the hydrogen chloride is about 16% -20%), the viscosity of the betaine zwitterionic surfactant is continuously reduced, the plugging performance is lost, at the moment, the methyl ammonium sulfate cationic surfactant forms worm-shaped aggregates in the presence of calcium ions at the concentration of the acid of 0% -4%, the viscosity of the viscosity reaches a viscosity of a viscosity-variable peak, and the secondary plugging is carried out on cracks, so that the continuous plugging is formed on the cracks of the reservoir. The results show that the steering acid provided by the invention can continuously have the continuity on the plugging capability of the stratum.
Claims (11)
1. A diverting acid, wherein the diverting acid comprises, based on 100% of the total mass of the diverting acid: 2% -4% of betaine zwitterionic surfactant, 2% -4% of ammonium methyl sulfate cationic surfactant, 0.04% -0.08% of tackifier, 1% -3% of corrosion inhibitor, 1% -2% of corrosion inhibition synergist, 1% -3% of iron ion stabilizer, 10% -28% of hydrogen chloride and the balance of water;
the betaine zwitterionic surfactant comprises hexadecylamide propyl hydroxysulfobetaine and/or erucic acid amid propyl hydroxysulfobetaine;
the ammonium methyl sulfate cationic surfactant comprises stearamidopropyl trimethyl ammonium methyl sulfate and/or docosyl trimethyl ammonium methyl sulfate;
the tackifier comprises a polyacrylamide derivative; the viscosity average molecular weight of the polyacrylamide derivative is 1000 ten thousand to 1200 ten thousand;
the preparation method of the polyacrylamide derivative comprises the following steps: methacrylic oxyethyl trimethyl ammonium chloride, acrylamide and chain extender according to the weight ratio of 8.5:1: mixing 0.5 mass ratio to form raw materials, placing into a reaction vessel, adjusting pH to 6-7, and adding (NH) accounting for 0.02% of the total weight of the raw materials 4 ) 2 S 2 O 8 -NaHSO 3 Sealing, reacting for 4 hours at 45 ℃ to obtain colloid, drying and crushing to obtain the tackifier;
wherein the chain extender comprises polyethylene glycol diacrylate.
2. The diverting acid according to claim 1, wherein the corrosion inhibitor comprises a quaternary ammonium salt.
3. The diverting acid of claim 2, wherein the molecular weight of the quaternary ammonium salt is 500-1000.
4. The diverting acid according to claim 2, wherein the quaternary ammonium salt comprises a quinoline quaternary ammonium salt and/or a mannich base quaternary ammonium salt.
5. The diverting acid according to claim 1, wherein the corrosion-inhibiting synergist comprises dimethylformamide and/or pyroantimonate.
6. The diverting acid of claim 5, wherein the pyroantimonate comprises Jiao Tisuan potassium and/or sodium pyroantimonate.
7. The diverting acid of claim 1, wherein the iron ion stabilizer comprises one or a combination of two or more of citric acid, sodium nitrilotriacetate, and sodium erythorbate.
8. The diverting acid according to claim 1, wherein the diverting acid comprises, based on 100% of the total mass of the diverting acid: 4% of betaine zwitterionic surfactant, 3% of ammonium methyl sulfate cationic surfactant, 0.04% of tackifier, 3% of corrosion inhibitor, 1% of corrosion inhibition synergist, 1% of iron ion stabilizer, 20% of hydrogen chloride and the balance of water.
9. The diverting acid according to claim 1, wherein the diverting acid comprises, based on 100% of the total mass of the diverting acid: 2-4% of erucamide propyl hydroxysulfobetaine, 2-4% of stearamidopropyl trimethyl ammonium methyl sulfate, 0.04-0.08% of tackifier, 1-3% of Mannich base quaternary ammonium salt, 1-2% of dimethylformamide, 1-3% of isoascorbic acid, 20% of hydrogen chloride and the balance of water.
10. A process for the preparation of a diverting acid as claimed in any one of claims 1 to 9 comprising: mixing hydrogen chloride, a corrosion inhibitor, a corrosion inhibition synergistic agent and an iron ion stabilizer, sequentially adding a tackifier, a betaine zwitterionic surfactant and a methyl ammonium sulfate cationic surfactant, and uniformly mixing to obtain the steering acid.
11. Use of a steering acid according to any one of claims 1-9 in plugging applications.
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