CN109337665A - Zero-flowback retarding acid liquid for sandstone reservoir - Google Patents
Zero-flowback retarding acid liquid for sandstone reservoir Download PDFInfo
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- CN109337665A CN109337665A CN201810831014.6A CN201810831014A CN109337665A CN 109337665 A CN109337665 A CN 109337665A CN 201810831014 A CN201810831014 A CN 201810831014A CN 109337665 A CN109337665 A CN 109337665A
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- acid
- percent
- acid solution
- sandstone reservoir
- returning
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- 239000002253 acid Substances 0.000 title claims abstract description 50
- 239000007788 liquid Substances 0.000 title abstract description 6
- 230000000979 retarding effect Effects 0.000 title abstract description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims abstract description 8
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 10
- 229920000058 polyacrylate Polymers 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical group F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- 229920002367 Polyisobutene Polymers 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- 125000003342 alkenyl group Chemical group 0.000 claims description 5
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 5
- WDHYRUBXLGOLKR-UHFFFAOYSA-N phosphoric acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OP(O)(O)=O WDHYRUBXLGOLKR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004584 polyacrylic acid Substances 0.000 claims description 5
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 4
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 4
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 4
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 2
- 244000248349 Citrus limon Species 0.000 claims 1
- 235000005979 Citrus limon Nutrition 0.000 claims 1
- UREZNYTWGJKWBI-UHFFFAOYSA-M benzethonium chloride Chemical compound [Cl-].C1=CC(C(C)(C)CC(C)(C)C)=CC=C1OCCOCC[N+](C)(C)CC1=CC=CC=C1 UREZNYTWGJKWBI-UHFFFAOYSA-M 0.000 claims 1
- 150000002460 imidazoles Chemical group 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 8
- 238000001556 precipitation Methods 0.000 abstract description 7
- -1 hydrogen ions Chemical class 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 4
- 239000001257 hydrogen Substances 0.000 abstract description 4
- 230000036632 reaction speed Effects 0.000 abstract description 3
- 230000020477 pH reduction Effects 0.000 abstract description 2
- 230000001934 delay Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 150000007524 organic acids Chemical class 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 29
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 15
- KVBCYCWRDBDGBG-UHFFFAOYSA-N azane;dihydrofluoride Chemical compound [NH4+].F.[F-] KVBCYCWRDBDGBG-UHFFFAOYSA-N 0.000 description 4
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 230000000536 complexating effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001838 alkalimetric titration Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004448 titration Methods 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
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/725—Compositions containing polymers
-
- 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
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
-
- 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
- C09K2208/32—Anticorrosion additives
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to the technical field of oil extraction engineering, and particularly belongs to a zero-flowback retarding acid liquid for a sandstone reservoir. The invention solves the problems that the acid rock reaction is too fast and the residual acid is easy to generate secondary precipitation in the conventional earth acid acidification process. The invention comprises the following components by weight percent: 6 to 10 percent of organic acid polymer solution, 6 to 10 percent of villiaumite, 1 percent of stabilizer, 1 percent of corrosion inhibitor, 10 percent of hydrochloric acid and the balance of water. The invention has the characteristic of multi-stage release of hydrogen ions, delays the reaction speed of acid rocks, prevents secondary precipitation, realizes zero flowback of residual acid, reduces the measure cost and the like.
Description
Technical field
The present invention relates to technical field of oil production engineering, especially belong to a kind of sandstone reservoir slow acid solution of zero row of returning.
Background technique
Sandstone oil and gas reservoir acidification at present is generally using mud acid, that is, hydrofluoric acid and hydrochloric acid mixture as acidifying solution, mud acid acid
Change is primarily present following three problems causes reaction distance short, acidizing radius is small first is that reacting too fast with sandstone；Second is that and sand
It will form the secondary precipitations such as silicic acid and metasilicic acid, fluosilicate, iron hydroxide after rock reaction, influence the general effect of acid solution；Three
It is to need to return remaining acid solution after constructing to eject, complex treatment process increases measure cost.Therefore, it is badly in need of invention
A kind of retardative property is strong, secondary precipitation is few, acid solution of the residual acid without the row of returning.Purpose is that there are acid-rock reactions in solution acidization
It is too fast, be also easy to produce secondary precipitation and residual acid need to the row of returning the problem of causing.
Summary of the invention
Present invention offer can improve acid solution slow speed effect, can prevent secondary precipitation from generating again, reaches zero row of returning of acid solution and wants
A kind of sandstone reservoir the asked slow acid solution of zero row of returning.
To achieve the above object, the invention adopts the following technical scheme: the present invention is by weight percentage by following ingredients group
At: 6%~10% acrylic polymer solution, 6%~10% villiaumite, 1% stabilizer, 1 % corrosion inhibiter, 10% hydrochloric acid, surplus is water.
Acrylic polymer solution is that isopropyl alkenyl phosphoric acid-acrylic acid copolymer soln, the polyisobutylene phosphoric acid of content 50% are molten
One of liquid, polyacrylic acid solution or any several combination.
Villiaumite is one of ammonium acid fluoride, ammonium fluoride.
Stabilizer is one of citric acid, disodium ethylene diamine tetraacetate.
Corrosion inhibiter is one of imidazoline quaternary ammonium salt, four ammonium of hexa-methylene, thiocarbamide or any several combination.
Acid solution action principle of the present invention is after acid solution enters reservoir, and acid solution gradually slowly releases hydrogen by multiple ionization
Ion, the hydrogen ion discharged slowly generate hydrofluoric acid with villiaumite again, reduce acid-rock reaction speed, increase the effective of acid solution
Operating distance.In addition, the complexing functional group contained in acid solution, has strong complexing to calcium, iron, magnesium plasma, can be complexed
And disperse the metal ion in residual acid, it effectively prevent secondary precipitation to generate, formation contaminant is greatly lowered, realize the zero of residual acid
The row of returning.
Compared with the prior art the present invention has the advantages that
(1) for the present invention using acrylic polymer as the main component of acid solution, acrylic polymer has multiple ionization hydrogen ion
Characteristic, reduce acid-rock reaction speed, increase the EFFECTIVE RANGE of acid solution.
(2) acrylic polymer has the characteristic being complexed by force, the metal ion network in residual acid can be merged dispersion, prevent two
Secondary precipitating generates, and realizes residual sour zero row of returning.
Detailed description of the invention: Fig. 1 is alkalimetric titration curve graph of the present invention；Fig. 2 is corrosion retardative property curve of the present invention.
Specific embodiment: the present invention is described in further details below in conjunction with specific embodiment: its percentage by weight
Than being made of following ingredients: 6%~10% acrylic polymer solution, 6%~10% villiaumite, 1% stabilizer, 1 % corrosion inhibiter, 10% salt
Acid, surplus are water.
Acrylic polymer solution is that isopropyl alkenyl phosphoric acid-acrylic acid copolymer soln, the polyisobutylene phosphoric acid of content 50% are molten
One of liquid, polyacrylic acid solution or any several combination.
Villiaumite is one of ammonium acid fluoride, ammonium fluoride.
Stabilizer is one of citric acid, disodium ethylene diamine tetraacetate.
Corrosion inhibiter is one of imidazoline quaternary ammonium salt, four ammonium of hexa-methylene, thiocarbamide or any several combination.
Embodiment 1, the present invention is composed of the following components by the weight percentage:
Isopropyl alkenyl phosphoric acid-acrylic acid copolymer soln: 6%, wherein isopropyl alkenyl phosphoric acid-acrylic copolymer content is 50%；
Ammonium acid fluoride: 6%；
Citric acid: 1%；
Thiocarbamide: 1%；
Hydrochloric acid: 10%；
Surplus is water；
Specific process for preparation are as follows:
1, by the beaker of 1L, 60g isopropyl alkenyl phosphoric acid-acrylic acid copolymer soln is added, adds water 440g, stirring evenly makes it
Sufficiently dissolution.
2,320g water is first added in another 500mL beaker, then sequentially adds citric acid 10g, hydrogen fluoride in order
Ammonia 60g, thiocarbamide 10g, hydrochloric acid 100g, stirring evenly dissolves it sufficiently.
3, the solution for obtaining second step is added in the solution that the first step obtains, and stirring evenly dissolves it sufficiently, i.e.,
The present invention can be obtained.
Embodiment 2, the present invention is composed of the following components by the weight percentage:
Polyisobutylene phosphoric acid solution: 8%, wherein polyisobutylene phosphorus acid content is 50%；
Ammonium fluoride: 8%；
Citric acid: 1%；
Imidazoline quaternary ammonium salt: 1%；
Hydrochloric acid: 10%；
Surplus is water；
Preparation method is the same as embodiment 1.
Embodiment 3, the present invention is composed of the following components by the weight percentage:
Polyacrylic acid solution: 10%, wherein polyacrylic acid content is 50%；
Ammonium acid fluoride: 10%；
Disodium ethylene diamine tetraacetate: 1%；
Four ammonium of hexa-methylene: 1%；
Hydrochloric acid: 10%；
Surplus is water；
Preparation method is the same as embodiment 1.
Embodiment 4, this gives the experiments of the alkalimetric titration of acid solution of the present invention.
Situation is ionized for hydrogen ion more of the invention and mud acid, experiment titrates the present invention and soil with sodium hydroxide respectively
Acid, experimental result is shown in Fig. 1, the experimental results showed that, since regular mud acid belongs to monoacid, titration process hydrogen ion, which belongs to, all to be released
Put state, pH value curve is mutated in great-jump-forward, and " step " shape of different bufferings is presented in pH value curve of the invention, illustrate hydrogen from
Son is slow release stage by stage, has multiple ionization characteristic.
Embodiment 5: this gives corrosion retardative property of the invention evaluations.
The formation core for choosing Daqing oil field block, rock core is crushed and is sieved, and chooses 12 mesh~18 mesh rock
Bits are used as corrosion object, acid solution and landwaste mass ratio for 10:1, under the total hydrogen content same case of the present invention and mud acid, by landwaste
Respectively with acid soak 1h, 4h, 8h, 16h, for 24 hours, 32h, measure the corrosion rate of landwaste, experimental result is shown in Fig. 2.Experimental result table
Bright: mud acid corrosion rate is basically unchanged after 16 hours corrosion rates lower than mud acid 3%, 24 hours of the invention, and corrosion rate of the invention after
It is continuous to increase, show that the present invention has apparent corrosion retardative property.
Embodiment 6, this gives complex performance of the invention evaluations.
The injection water for selecting Daqing oil field block, under simulation stratum condition, scale inhibition of the measurement present invention to injection water
Rate, calculation formula is as follows, and experimental result is shown in Table 1.
In formula:
E-scale inhibition performance, unit are percentage (%)
C0- the calcium ion concentration being added, unit are milligrams per liter (mg/L)
C1Calcium ion concentration in-non-acid liquid mixed solution, unit are milligrams per liter (mg/L)
C2Calcium ion concentration in-acid liquid mixed solution, unit are milligrams per liter (mg/L)
The experimental results showed that institute's invention scale inhibition performance is 91.5%, and the scale inhibition performance of regular mud acid is only 16%, illustrates the present invention to mould
Metal ion has very strong complexing power in quasi- water flooding, reduces the generation of dirt.
The complex performance evaluation experimental result of the present invention of table 1
Claims (5)
1. a kind of sandstone reservoir slow acid solution of zero row of returning, it is characterised in that: it is composed of the following components by the weight percentage: 6%
~10% acrylic polymer solution, 6%~10% villiaumite, 1% stabilizer, 1 % corrosion inhibiter, 10% hydrochloric acid, surplus is water.
2. a kind of sandstone reservoir according to claim 1 slow acid solution of zero row of returning, it is characterised in that: acrylic polymer
Solution is in the isopropyl alkenyl phosphoric acid-acrylic acid copolymer soln, polyisobutylene phosphoric acid solution, polyacrylic acid solution of content 50%
The combination of one or any of several.
3. a kind of sandstone reservoir according to claim 1 slow acid solution of zero row of returning, it is characterised in that: villiaumite is hydrogen fluoride
One of ammonium, ammonium fluoride.
4. a kind of sandstone reservoir according to claim 1 slow acid solution of zero row of returning, it is characterised in that: stabilizer is lemon
One of acid, disodium ethylene diamine tetraacetate.
5. a kind of sandstone reservoir according to claim 1 slow acid solution of zero row of returning, it is characterised in that: corrosion inhibiter is imidazoles
One of hyamine, four ammonium of hexa-methylene, thiocarbamide or any several combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810831014.6A CN109337665A (en) | 2018-07-26 | 2018-07-26 | Zero-flowback retarding acid liquid for sandstone reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810831014.6A CN109337665A (en) | 2018-07-26 | 2018-07-26 | Zero-flowback retarding acid liquid for sandstone reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109337665A true CN109337665A (en) | 2019-02-15 |
Family
ID=65291313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810831014.6A Pending CN109337665A (en) | 2018-07-26 | 2018-07-26 | Zero-flowback retarding acid liquid for sandstone reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109337665A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251214A (en) * | 2020-10-29 | 2021-01-22 | 四川中汇安达石油化工有限公司 | Stratum degradation acid and application thereof |
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