CN111635751A - Clean self-diverting acid liquid system suitable for carbonate reservoir and preparation method thereof - Google Patents
Clean self-diverting acid liquid system suitable for carbonate reservoir and preparation method thereof Download PDFInfo
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- CN111635751A CN111635751A CN202010627726.3A CN202010627726A CN111635751A CN 111635751 A CN111635751 A CN 111635751A CN 202010627726 A CN202010627726 A CN 202010627726A CN 111635751 A CN111635751 A CN 111635751A
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- acid
- diverting
- liquid system
- system suitable
- clean self
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- 239000002253 acid Substances 0.000 title claims abstract description 67
- 239000007788 liquid Substances 0.000 title claims abstract description 29
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 11
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 11
- 239000004094 surface-active agent Substances 0.000 claims abstract description 11
- 150000003458 sulfonic acid derivatives Chemical class 0.000 claims abstract description 9
- 239000002280 amphoteric surfactant Substances 0.000 claims abstract description 8
- 239000002608 ionic liquid Substances 0.000 claims abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 36
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 12
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 10
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 10
- 239000002738 chelating agent Substances 0.000 claims description 7
- NVNZYOKGLZTBBX-UHFFFAOYSA-N dodecane-1-sulfonate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCCCCCCS(O)(=O)=O NVNZYOKGLZTBBX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 3
- 239000005751 Copper oxide Substances 0.000 claims description 3
- 229910000431 copper oxide Inorganic materials 0.000 claims description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 2
- ZZQMROMLJXPYDP-UHFFFAOYSA-N CCCCCCCCCCCCS(=O)(=O)OCCN Chemical compound CCCCCCCCCCCCS(=O)(=O)OCCN ZZQMROMLJXPYDP-UHFFFAOYSA-N 0.000 claims description 2
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 2
- PJZAXDKJCZUIMQ-UHFFFAOYSA-N dodecane-1-sulfonic acid;2-(2-hydroxyethylamino)ethanol Chemical compound OCCNCCO.CCCCCCCCCCCCS(O)(=O)=O PJZAXDKJCZUIMQ-UHFFFAOYSA-N 0.000 claims description 2
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000001509 sodium citrate Substances 0.000 claims description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 2
- 239000000176 sodium gluconate Substances 0.000 claims description 2
- 235000012207 sodium gluconate Nutrition 0.000 claims description 2
- 229940005574 sodium gluconate Drugs 0.000 claims description 2
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims 2
- KCXFHTAICRTXLI-UHFFFAOYSA-N propane-1-sulfonic acid Chemical compound CCCS(O)(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-N 0.000 claims 2
- 239000011734 sodium Substances 0.000 claims 2
- 229910052708 sodium Inorganic materials 0.000 claims 2
- FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical compound OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000000693 micelle Substances 0.000 description 7
- NPAWNPCNZAPTKA-UHFFFAOYSA-M sodium;propane-1-sulfonate Chemical compound [Na+].CCCS([O-])(=O)=O NPAWNPCNZAPTKA-UHFFFAOYSA-M 0.000 description 6
- 239000005642 Oleic acid Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- -1 Calcium carboxylate Chemical class 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- ALMKBIQZBJUSQR-UHFFFAOYSA-N 2-aminoethanol;dodecane-1-sulfonic acid Chemical compound NCCO.CCCCCCCCCCCCS(O)(=O)=O ALMKBIQZBJUSQR-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- YPKOTWSAVCIFAM-UHFFFAOYSA-N [Na].CCC Chemical compound [Na].CCC YPKOTWSAVCIFAM-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 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
- C09K8/74—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
- C09K2208/10—Nanoparticle-containing well treatment fluids
Abstract
The invention relates to the technical field of carbonate reservoir exploitation, in particular to a clean self-diverting acid liquid system suitable for a carbonate reservoir and a preparation method thereof. The composite material comprises the following components in percentage by mass: 1-5% of a hydroxyl sulfonate amphoteric surfactant, 3-10% of an ionic liquid surfactant, 1-5% of a sulfonic acid derivative, 1-5% of a nano metal oxide, 15-25% of an acid, calculated as a pure acid, and the balance of water. The clean self-diverting acid liquid system provided by the invention has a strong diverting function, the highest viscosity of residual acid under the reservoir temperature condition is 325-359 mPa & S, and the highest viscosity of residual acid under the normal temperature condition can reach 987mPa & S.
Description
Technical Field
The invention relates to the technical field of carbonate reservoir exploitation, in particular to a clean self-diverting acid liquid system suitable for a carbonate reservoir and a preparation method thereof.
Background
Carbonate reservoirs are one of the main types of oil and gas reservoirs at present, are characterized by containing a large number of cracks or microcracks, have high permeability but low matrix permeability, and acid fracturing modification becomes one of the main technical means for building, putting into production and increasing production of the oil and gas reservoirs. In order to improve the effect of acidizing and acid fracturing of a reservoir, various chemical diverting agents are generally adopted. The carbonate reservoir mainly comprises calcite, dolomite, magnesite and other mineral components, hydrochloric acid is used for acidizing the carbonate reservoir, the hydrochloric acid in acid liquor reacts with carbonate rock mineral substances after entering a stratum, and a large amount of divalent metal cations (Ca) are generated in an acid liquor system along with the acid-rock reaction2+、Mg2+) Under the combined action of the pH value and the divalent metal cations, active agent monomers in an acid liquor system are curled and wound, spherical micelles are converted into worm-shaped micelles, the micelles are mutually interwoven to form a three-dimensional space network structure, the apparent viscosity of the acid liquor is rapidly increased, the viscosity changing process is realized, the effects of reducing rate and turning are achieved, along with the completion of acid rock reaction, when the pH value is increased to be more than 4, and under the combined action of the increase of the divalent metal cation concentration, the worm-shaped micelles are converted into the spherical micelles to automatically break the gel, and the reconstruction of a carbonate rock reservoir is realized. However, the clean self-diverting acid solution in the prior art has great damage to the reservoir and poor temperature resistance, and is limited in practical application.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a clean self-diverting acid liquid system suitable for a carbonate reservoir to improve the temperature resistance and reduce the damage to the reservoir, and also provides a preparation method.
The invention is realized by the following technical scheme:
a clean self-diverting acid liquid system suitable for carbonate reservoirs comprises the following components in percentage by mass:
1-5% of a hydroxy sulfonate amphoteric surfactant,
3-10% of ionic liquid surfactant,
1-5% of sulfonic acid derivatives
1 to 5 percent of nano metal oxide
15-25% of acid, calculated as pure acid;
the balance being water.
Further, the clean self-diverting acid liquid system suitable for the carbonate reservoir also comprises 2-5% of a calcium-magnesium ion chelating agent, wherein the calcium-magnesium ion chelating agent is at least one of HEDP, EDTMPA, sodium gluconate, sodium citrate and ammonium citrate. By adding the calcium-magnesium ion chelating agent, the calcium-magnesium ion resistance of the composite material is enhanced, and the stability is improved.
The hydroxyl sulfonate type amphoteric surfactant is one or two of 2-hydroxy-3- (N, N-dimethyl-N-oleic acid amide propyl) sodium propane sulfonate and 2-hydroxy-3- (N, N-dimethyl-N-oleic acid amide propyl) sodium propane sulfonate. Calcium carboxylate and magnesium carboxylate generated by the conventional surfactant are easy to precipitate in a stratum, so that the stratum is damaged, the acid fracturing effect is weakened, and the hydroxy sulfonate amphoteric surfactant is difficult to generate insoluble calcium magnesium salt, so that the damage to the stratum is reduced.
The sulfonic acid derivative is one or more of monohydroxy sulfonate, dibasic hydroxy sulfonic acid, polybasic hydroxy sulfonic acid and polybasic hydroxy sulfonate. The sulfonic acid derivative and the hydroxyl sulfonate surfactant are compounded, so that a synergistic effect can be generated in the process of forming worm micelles, and the viscosity of residual acid is improved.
The ionic liquid surfactant is one or more of triethanolamine dodecyl sulfonate, diethanolamine dodecyl sulfonate or ethanolamine dodecyl sulfonate. The viscosity of the acid liquor system can be increased, and the temperature resistance of the acid liquor can be improved.
The nano metal oxide is one or more of nano zirconium oxide, nano copper oxide or nano magnesium oxide; the particle size of the nano metal oxide is 10-100 nm. The temperature resistance of the clean self-diverting acid liquid system can be improved by adding the nano metal oxide.
The acid is hydrochloric acid or a mixed acid of hydrochloric acid and hydrofluoric acid. In the mixed acid, the mass ratio of the hydrochloric acid to the hydrofluoric acid is 2-5: 15-20.
A process for preparing the clean self-diverting acid liquid system suitable for the carbonate reservoir includes proportionally mixing acid with water, adding hydroxy sulfonate type amphoteric surfactant, ionic liquid surfactant, sulfonic acid derivative and nano-class metal oxide, and mixing.
The beneficial effect of the invention is that,
(1) by optimizing the component ratio and compounding the sulfonic acid derivative and the hydroxyl sulfonate surfactant, the synergistic effect can be generated in the process of forming worm micelles, and the viscosity of residual acid is improved; the viscosity and temperature resistance of the clean self-diverting acid liquid system can be improved by adding the nano metal oxide and the ionic liquid surfactant; by adding the calcium-magnesium ion chelating agent, the calcium-magnesium ion resistance of the material is enhanced, and the stability of the system is improved;
(2) the clean self-diverting acid liquid system provided by the invention has a strong diverting function, the highest viscosity of residual acid under the reservoir temperature condition is 325-359 mPa & S, and the highest viscosity of residual acid under the normal temperature condition can reach 987mPa & S.
Detailed Description
The invention is further described below with reference to specific examples so that a person skilled in the art may better understand the invention, but without thereby restricting the invention.
Example 1
A clean self-diverting acid liquid system suitable for use in carbonate reservoirs comprising the following components:
1g of 2-hydroxy-3- (N, N-dimethyl-N-oleic acid amidopropyl) sodium propanesulfonate, 10g of dodecyl sulfonic acid triethanolamine salt, 1g of monohydroxy sulfonate, 4g of nano magnesium oxide, 15g of hydrochloric acid and the balance of water, wherein the total amount is 100 g.
Mixing hydrochloric acid and water uniformly according to a proportion, adding the rest components, and mixing uniformly to obtain the clean self-diverting acid liquid system.
Example 2
5g of 3-hydroxy-3- (N, N-dimethyl-N-oleic acid amidopropyl) sodium propanesulfonate, 5g of dodecyl sulfonic acid ethanolamine salt, 1g of polybasic hydroxysulfonic acid, 4g of nano copper oxide, 5g of hydrochloric acid, 20g of hydrofluoric acid and the balance of water, wherein the total amount is 100 g.
Mixing hydrochloric acid, hydrofluoric acid, mixed acid and water uniformly according to a proportion, adding the rest components, and mixing uniformly to obtain the clean self-diverting acid liquid system.
Example 3
1g of 2-hydroxy-3- (N, N-dimethyl-N-oleic acid amidopropyl) sodium propane sulfonate, 3g of calcium magnesium ion chelating agent HEDP2g, 3g of dodecyl sulfonic acid triethanolamine salt, 5g of monohydroxyl sulfonate, 1g of nano magnesium oxide, 15g of hydrochloric acid and the balance of water, wherein the total amount is 100 g.
Mixing hydrochloric acid and water uniformly according to a proportion, adding the rest components, and mixing uniformly to obtain the clean self-diverting acid liquid system.
Example 4
1g of 2-hydroxy-3- (N, N-dimethyl-N-oleic acid amidopropyl) propane sodium sulfonate, 3g of dodecyl sulfonic acid triethanolamine salt, 5g of monohydroxy sulfonate, 1g of nano magnesium oxide, 15g of hydrochloric acid and the balance of water, wherein the total amount is 100 g.
Mixing hydrochloric acid and water uniformly according to a proportion, adding the rest components, and mixing uniformly to obtain the clean self-diverting acid liquid system.
Example 5
3g of 3-hydroxy-3- (N, N-dimethyl-N-oleic acid amidopropyl) sodium propanesulfonate, 7g of dodecyl sulfonic acid triethanolamine salt, 5g of monohydroxy sulfonate, 1g of nano magnesium oxide, 15g of hydrochloric acid and the balance of water, wherein the total amount is 100 g.
Mixing hydrochloric acid and water uniformly according to a proportion, adding the rest components, and mixing uniformly to obtain the clean self-diverting acid liquid system.
The performance test of the clean diverting acid system of examples 1-5 of the present invention was performed, and the results are shown in table 1:
TABLE 1
| Examples of Performance indices | Temperature resistance (. degree. C.) | Maximum viscosity of residual acid (mPa. s) at reservoir temperature | Maximum viscosity of residual acid (mPa. s) at room temperature | Viscosity of the breaker fluid (mPa. s) |
| Example 1 | ＞130 | 325 | 958 | ＜3 |
| Example 2 | ＞130 | 358 | 980 | ＜5 |
| Example 3 | ＞130 | 359 | 987 | ＜3 |
| Example 4 | ＞130 | 328 | 975 | ＜5 |
| Example 5 | ＞130 | 329 | 975 | ＜5 |
The clean self-diverting acid liquid system provided by the invention has a strong diverting function, the highest viscosity of residual acid under the reservoir temperature condition is 325-359 mPa & S, and the highest viscosity of residual acid under the normal temperature condition can reach 987mPa & S.
Claims (10)
1. A clean self-diverting acid liquid system suitable for carbonate reservoirs is characterized by comprising the following components in percentage by mass:
1-5% of a hydroxy sulfonate amphoteric surfactant,
3-10% of ionic liquid surfactant,
1-5% of sulfonic acid derivatives
1 to 5 percent of nano metal oxide
15-25% of acid, calculated as pure acid;
the balance being water.
2. The clean self-diverting acid liquid system suitable for carbonate reservoirs according to claim 1, further comprising 2-5% by mass of a calcium-magnesium ion chelating agent.
3. The clean self-diverting acid liquid system suitable for carbonate reservoirs according to claim 2, wherein the calcium magnesium ion chelating agent is at least one of HEDP, EDTMPA, sodium gluconate, sodium citrate, ammonium citrate.
4. A clean self-diverting acid liquid system suitable for use in a carbonate reservoir according to claim 1, characterised in that the hydroxysulfonate-type amphoteric surfactant is one or both of sodium 2-hydroxy-3- (N, N-dimethyl-N-oleamidopropyl) propanesulfonate, sodium 2-hydroxy-3- (N, N-dimethyl-N-oleamidopropyl) propanesulfonate.
5. The clean self-diverting acid liquid system suitable for carbonate reservoirs of claim 1, wherein the sulfonic acid derivative is one or more of monohydroxysulfonate, dihydroxysulfonic acid, polyhydroxysulfonic acid and polyhydroxysulfonate.
6. A clean self-diverting acid liquid system suitable for use in carbonate reservoirs according to claim 1, characterized in that the ionic liquid surfactant is one or more of triethanolamine dodecyl sulfonate, diethanolamine dodecyl sulfonate or ethanolamine dodecyl sulfonate.
7. The clean self-diverting acid liquid system suitable for carbonate reservoirs according to claim 1, wherein the nano metal oxide is one or more of nano zirconia, nano copper oxide or nano magnesium oxide.
8. The clean self-diverting acid liquid system suitable for carbonate reservoirs according to claim 7, wherein the particle size of the nano metal oxide is 10-100 nm.
9. The clean self-diverting acid liquid system suitable for carbonate reservoirs according to claim 1, wherein the acid is hydrochloric acid or a mixed acid of hydrochloric acid and hydrofluoric acid; in the mixed acid, the mass ratio of the hydrochloric acid to the hydrofluoric acid is 2-5: 15-20.
10. A method for preparing a clean self-diverting acid liquid system suitable for carbonate reservoirs according to any of claims 1 to 9, characterized in that the method is obtained by uniformly mixing acid and water according to the proportion, then adding a hydroxysulfonate amphoteric surfactant, an ionic liquid surfactant, a sulfonic acid derivative and a nano metal oxide, and uniformly mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010627726.3A CN111635751B (en) | 2020-07-02 | 2020-07-02 | Clean self-rotating acid liquor system suitable for carbonate reservoir and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010627726.3A CN111635751B (en) | 2020-07-02 | 2020-07-02 | Clean self-rotating acid liquor system suitable for carbonate reservoir and preparation method thereof |
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| Publication Number | Publication Date |
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| CN111635751A true CN111635751A (en) | 2020-09-08 |
| CN111635751B CN111635751B (en) | 2023-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154468A (en) * | 2020-01-06 | 2020-05-15 | 西南石油大学 | Selective water shutoff agent for oilfield water shutoff |
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|---|---|---|---|---|
| CN102443386A (en) * | 2011-12-13 | 2012-05-09 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Energy enhancing steering acid liquid system |
| CN103820098A (en) * | 2014-02-24 | 2014-05-28 | 中国石油大学(华东) | Non-damage self-diverting acid and preparation method and application |
| CN111171231A (en) * | 2018-11-13 | 2020-05-19 | 中国石油化工股份有限公司 | Method for preparing acid liquor system |
-
2020
- 2020-07-02 CN CN202010627726.3A patent/CN111635751B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443386A (en) * | 2011-12-13 | 2012-05-09 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Energy enhancing steering acid liquid system |
| CN103820098A (en) * | 2014-02-24 | 2014-05-28 | 中国石油大学(华东) | Non-damage self-diverting acid and preparation method and application |
| CN111171231A (en) * | 2018-11-13 | 2020-05-19 | 中国石油化工股份有限公司 | Method for preparing acid liquor system |
Non-Patent Citations (1)
| Title |
|---|
| 刘彝等: "VDA变黏酸机理", 《天然气工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154468A (en) * | 2020-01-06 | 2020-05-15 | 西南石油大学 | Selective water shutoff agent for oilfield water shutoff |
| CN111154468B (en) * | 2020-01-06 | 2022-08-26 | 西南石油大学 | Selective water shutoff agent for oilfield water shutoff |
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| Publication number | Publication date |
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| CN111635751B (en) | 2023-06-16 |
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