CN111363531A - Blocking remover and preparation method and application thereof - Google Patents
Blocking remover and preparation method and application thereof Download PDFInfo
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- CN111363531A CN111363531A CN202010170143.2A CN202010170143A CN111363531A CN 111363531 A CN111363531 A CN 111363531A CN 202010170143 A CN202010170143 A CN 202010170143A CN 111363531 A CN111363531 A CN 111363531A
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 63
- 239000004005 microsphere Substances 0.000 claims abstract description 53
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 230000002579 anti-swelling effect Effects 0.000 claims abstract description 27
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 230000000149 penetrating effect Effects 0.000 claims description 22
- 239000003054 catalyst Substances 0.000 claims description 14
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 claims description 13
- GZSUIILTAVDZPL-UHFFFAOYSA-N C(C)(=O)O.C(C)(=O)O.C=C.C=C Chemical compound C(C)(=O)O.C(C)(=O)O.C=C.C=C GZSUIILTAVDZPL-UHFFFAOYSA-N 0.000 claims description 13
- KMNWCNNLFBCDJR-UHFFFAOYSA-N [Si].[K] Chemical compound [Si].[K] KMNWCNNLFBCDJR-UHFFFAOYSA-N 0.000 claims description 10
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 10
- 125000001931 aliphatic group Chemical group 0.000 claims description 9
- HLLFAOOLQATURQ-UHFFFAOYSA-M sodium;1,4-di(octan-2-yloxy)-1,4-dioxobutane-2-sulfonate Chemical group [Na+].CCCCCCC(C)OC(=O)CC(S([O-])(=O)=O)C(=O)OC(C)CCCCCC HLLFAOOLQATURQ-UHFFFAOYSA-M 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 238000005886 esterification reaction Methods 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- -1 fatty acid ester Chemical class 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical group CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 6
- 229920000768 polyamine Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000006277 sulfonation reaction Methods 0.000 claims description 6
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 claims description 5
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 claims description 5
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 claims description 5
- MSXIOWULDXZJLX-UHFFFAOYSA-N n,n-dimethylpyrimidin-4-amine Chemical compound CN(C)C1=CC=NC=N1 MSXIOWULDXZJLX-UHFFFAOYSA-N 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000002357 osmotic agent Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 9
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 5
- 239000003960 organic solvent Substances 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 description 15
- 239000004927 clay Substances 0.000 description 8
- 239000011148 porous material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008961 swelling Effects 0.000 description 4
- 238000012643 polycondensation polymerization Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
Abstract
The invention belongs to the technical field of oilfield injection water development, and particularly provides a blocking remover, a preparation method and an application thereof, wherein the blocking remover is prepared from the following raw materials in percentage by mass: 30-40% of water reducing agent, 10-15% of solubilizer, 5-8% of penetrant, 5-8% of dispersant, 2-3% of anti-swelling agent and the balance of water, and solves the problem that the conventional acid, alkali and organic solvent cannot reduce the microsphere volume so as not to unblock the profile control well blocked by the microspheres.
Description
Technical Field
The invention belongs to the technical field of oilfield injection water development, and particularly relates to a blocking remover and a preparation method and application thereof.
Background
In the process of oilfield water injection development, in order to improve the water injection sweep efficiency and the recovery ratio, a water injection well is often required to be subjected to profile control, but after some polymer microsphere profile control well measures, the phenomenon of 'no water injection' exists, and a plugging control agent in the well is insoluble in acid, alkali and organic solvents, so that the plugging control of the well is basically ineffective on site at present, the corresponding stratum energy cannot be supplemented, and the corresponding oil well yield cannot be increased. Therefore, it is necessary to develop a blocking remover for blocking a profile control well.
Disclosure of Invention
The invention provides a blocking remover and a preparation method and application thereof, aiming at overcoming the problem that the common acid, alkali and organic solvent in the prior art can not reduce the microsphere volume, so that the profile control well blocked by microspheres can not be blocked.
Therefore, the invention provides a blocking remover, which is prepared from the following raw materials in percentage by mass: 30-40% of water reducing agent, 10-15% of solubilizer, 5-8% of penetrating agent, 5-8% of dispersing agent, 2-3% of anti-swelling and anti-swelling agent and the balance of water.
The water reducing agent is a mixed solution of an HSB aliphatic high-efficiency water reducing agent, sodium lignosulfonate, organic silicon potassium humate and water, and the volume ratio of the HSB aliphatic high-efficiency water reducing agent to the sodium lignosulfonate to the organic silicon potassium humate to the water is (10-30): (1-15): (3-15): (40-70).
The solubilizer is polyoxyethylene sorbitan fatty acid ester.
The penetrating agent is modified di-sec-octyl sulfosuccinate sodium salt.
The dispersing agent is ethylene bis stearamide.
The anti-swelling and anti-swelling agent is a condensate of epichlorohydrin-polyethylene polyamine.
The blocking remover is used for reducing the microsphere volume and carrying out the blocking removal of the profile control well, and is characterized in that: the specific blockage removing steps are as follows: the blocking remover is injected into the bottom of the profile control well, so that the blocking removal can be realized; the mass ratio of the blocking remover to the microspheres in the profile control well is 1: (1-10).
A preparation method of a blocking remover comprises the following specific steps: stirring 30-40% by mass of a water reducing agent, 10-15% by mass of a solubilizer, 5-8% by mass of a penetrating agent, 5-8% by mass of a dispersing agent, 2-3% by mass of an anti-swelling and shrinking agent and the balance of water at 60-70 ℃ until the materials are uniformly mixed to obtain the blocking remover.
A preparation method of a penetrant comprises the following specific steps: taking aromatic alcohol and diethylene diacetic acid as raw materials, carrying out esterification reaction under the action of a catalyst, and then carrying out sulfonation reaction with a sulfonating agent to obtain modified di-sec-octyl sulfosuccinate sodium salt; the mass ratio of the aromatic alcohol to the diethylene diacetic acid to the catalyst to the sulfonating agent is (1-50): (1-50): (1-20): (1-30).
The catalyst is one or the combination of two of toluenesulfonic acid and 4-dimethylamino pyrimidine; the sulfonating agent is one or the combination of concentrated sulfuric acid and chlorosulfonic acid.
The invention has the beneficial effects that: the blocking remover provided by the invention is prepared from the following raw materials in percentage by mass: 30-40% of water reducing agent, 10-15% of solubilizer, 5-8% of penetrating agent, 5-8% of dispersant, 2-3% of expansion and contraction preventing agent and the balance of water, wherein the blocking remover is used for reducing the volume of microspheres and performing the blocking removal of the profile control well. The method solves the problem that the conventional acid, alkali and organic solvent can not reduce the volume of microspheres, and provides plugging removal guidance for the microsphere-plugged well.
The blocking remover of the invention has the following advantages:
(1) the blocking remover disclosed by the invention has low viscosity, and can enter the well bottom together with injected water through a pump truck;
(2) the blocking remover can ensure that the polymer microspheres can rapidly lose water and the microsphere volume becomes small, thereby achieving the purpose of blocking removal;
(3) the blocking remover disclosed by the invention is mild in reaction condition and simple in production process;
(4) the blocking remover prevents the solid reduced microspheres from settling and agglomerating to block pore throats.
Drawings
FIG. 1 is a schematic diagram of a mixed solution obtained after the reaction of the acid solution and the core powder in example 4.
Detailed Description
Example 1:
the blocking remover is prepared from the following raw materials in percentage by mass: 30-40% of water reducing agent, 10-15% of solubilizer, 5-8% of penetrating agent, 5-8% of dispersing agent, 2-3% of anti-swelling and anti-swelling agent and the balance of water.
The water reducing agent is a mixed solution of an HSB aliphatic high-efficiency water reducing agent, sodium lignosulfonate, organic silicon potassium humate and water, and the volume ratio of the HSB aliphatic high-efficiency water reducing agent to the sodium lignosulfonate to the organic silicon potassium humate to the water is (10-30): (1-15): (3-15): (40-70). The water reducing agent can dehydrate the expanded polymer microspheres and reduce the volume of the microspheres, the sodium lignosulfonate reduces the difficulty of losing water to enter a circulation channel through the adsorption effect, and the organic silicon potassium humate reduces the liquid viscosity and prevents the microspheres from being blocked again.
The solubilizer is polyoxyethylene sorbitan fatty acid ester. The solubility of the microspheres in water is improved, and the amount of the microspheres is reduced.
The penetrating agent is modified di-sec-octyl sulfosuccinate sodium salt.
A preparation method of a penetrant comprises the following specific steps: taking aromatic alcohol and diethylene diacetic acid as raw materials, carrying out esterification reaction under the action of a catalyst, and then carrying out sulfonation reaction with a sulfonating agent to obtain modified di-sec-octyl sulfosuccinate sodium salt; the mass ratio of the aromatic alcohol to the diethylene diacetic acid to the catalyst to the sulfonating agent is (1-50): (1-50): (1-20): (1-30); the catalyst is one or the combination of two of toluenesulfonic acid and 4-dimethylamino pyrimidine; the sulfonating agent is one or the combination of concentrated sulfuric acid and chlorosulfonic acid. The penetrant increases the amount of the blocking remover entering the swelled microspheres.
The dispersing agent is ethylene bis stearamide. Preventing the solid-reduced microspheres from settling and agglomerating to plug the pore throat.
The anti-swelling and anti-swelling agent is a condensate of epichlorohydrin-polyethylene polyamine. Can stabilize clay for a long time and prevent the clay from swelling and polycondensation.
The blocking remover is used for reducing the microsphere volume and carrying out profile control well blocking removal, and the application specifically comprises the following blocking removal steps: the blocking remover is injected into the bottom of the profile control well, so that the blocking removal can be realized; the mass ratio of the blocking remover to the microspheres in the profile control well is 1: (1-10).
A preparation method of a blocking remover comprises the following specific steps: stirring 30-40% by mass of a water reducing agent, 10-15% by mass of a solubilizer, 5-8% by mass of a penetrating agent, 5-8% by mass of a dispersing agent, 2-3% by mass of an anti-swelling and shrinking agent and the balance of water at 60-70 ℃ until the materials are uniformly mixed to obtain the blocking remover.
The blocking remover is used for reducing the microsphere volume and carrying out the blocking removal of the profile control well. The method solves the problem that the conventional acid, alkali and organic solvent can not reduce the volume of microspheres, and provides plugging removal guidance for the microsphere-plugged well.
The blocking remover of the invention has the following advantages:
(1) the blocking remover disclosed by the invention has low viscosity, and can enter the well bottom together with injected water through a pump truck;
(2) the blocking remover can ensure that the polymer microspheres can rapidly lose water and the microsphere volume becomes small, thereby achieving the purpose of blocking removal;
(3) the blocking remover disclosed by the invention is mild in reaction condition and simple in production process;
(4) the blocking remover prevents the solid reduced microspheres from settling and agglomerating to block pore throats.
Example 2:
on the basis of the embodiment 1, the blocking remover is characterized in that: the blocking remover is prepared from the following raw materials in percentage by mass: 40% of water reducing agent, 15% of solubilizer, 8% of penetrating agent, 8% of dispersing agent, 3% of expansion and contraction preventing agent and the balance of water.
The water reducing agent is an HSB aliphatic high-efficiency water reducing agent, sodium lignosulfonate, organic silicon potassium humate and water according to a volume ratio of 10: 1: 3: 40, and the solubilizer is polyoxyethylene sorbitan fatty acid ester, so that the solubility of the polymer microspheres in water is improved, and the amount of the microspheres is reduced.
The penetrating agent is modified di-sec-octyl sulfosuccinate sodium salt, and the preparation method of the penetrating agent comprises the following specific steps: aromatic alcohol and diethylene diacetic acid are used as raw materials, esterification reaction is carried out under the action of toluenesulfonic acid, and sulfonation reaction is carried out under the action of concentrated sulfuric acid, so that the catalyst is prepared from the aromatic alcohol, the diethylene diacetic acid, the catalyst and the sulfonating agent in a mass ratio of 50: 25: 1: 30, of a nitrogen-containing gas; the dispersing agent is ethylene bis stearamide, and prevents the solid reduced microspheres from settling and agglomerating to block pore throats. The anti-swelling and anti-swelling agent is a condensate of epichlorohydrin-polyethylene polyamine, and can stabilize clay for a long time and prevent the clay from swelling and condensation polymerization.
The method comprises the following steps: and stirring 40% of water reducing agent, 15% of solubilizer, 8% of penetrating agent, 8% of dispersing agent, 3% of anti-swelling agent and the balance of water at 60 ℃ according to a proportion until the materials are uniformly mixed to obtain the blocking remover.
The blocking remover can be injected into the bottom of a well through a pump truck, and the mass ratio of the blocking remover to microspheres in the profile control well is 1: 5. as can be seen from Table 1, the blocking remover can allow the polymer microspheres to rapidly lose water and reduce the volume of the microspheres, thereby achieving the purpose of blocking removal.
Example 3:
on the basis of the embodiment 1, the blocking remover is characterized in that: the blocking remover is prepared from the following raw materials in percentage by mass: 30% of water reducing agent, 10% of solubilizer, 5% of penetrating agent, 5% of dispersing agent, 2% of expansion-proof expansion-shrinkage agent and the balance of water.
The water reducing agent is an HSB aliphatic high-efficiency water reducing agent, sodium lignosulfonate, organic silicon potassium humate and water according to a volume ratio of 30: 15: 15: 70, the solubilizer is polyoxyethylene sorbitan fatty acid ester, so that the solubility of the polymer microspheres in water is improved, and the amount of the microspheres is reduced.
The penetrating agent is modified di-sec-octyl sulfosuccinate sodium salt, and the preparation method of the penetrating agent comprises the following specific steps: aromatic alcohol and diethylene diacetic acid are used as raw materials, esterification reaction is carried out under the action of 4-dimethylamino pyrimidine, and sulfonation reaction is carried out under the action of chlorosulfonic acid, so that the aromatic alcohol, diethylene diacetic acid, a catalyst and a sulfonating agent are obtained, wherein the mass ratio of the aromatic alcohol to the diethylene diacetic acid to the catalyst to the sulfonating agent is 1: 50: 20: 1; the dispersing agent is ethylene bis stearamide, and prevents the solid reduced microspheres from settling and agglomerating to block pore throats. The anti-swelling and anti-swelling agent is a condensate of epichlorohydrin-polyethylene polyamine, and can stabilize clay for a long time and prevent the clay from swelling and condensation polymerization.
The method comprises the following steps: and stirring 30% of water reducing agent, 10% of solubilizer, 5% of penetrating agent, 5% of dispersing agent, 2% of anti-swelling and shrinking agent and the balance of water at 70 ℃ according to the proportion until the materials are uniformly mixed to obtain the blocking remover.
The blocking remover can be injected into the bottom of a well through a pump truck, and the mass ratio of the blocking remover to microspheres in the profile control well is 1: 10. as can be seen from Table 1, the blocking remover can allow the polymer microspheres to rapidly lose water and reduce the volume of the microspheres, thereby achieving the purpose of blocking removal.
Example 4:
on the basis of the embodiment 1, the blocking remover is characterized in that: the blocking remover is prepared from the following raw materials in percentage by mass: 35% of water reducing agent, 12.5% of solubilizer, 6.5% of penetrating agent, 6.5% of dispersing agent, 2.5% of anti-swelling and anti-shrinking agent and the balance of water.
The water reducing agent is an HSB aliphatic high-efficiency water reducing agent, sodium lignosulfonate, organic silicon potassium humate and water according to a volume ratio of 20: 8: 9: 55, the solubilizer is polyoxyethylene sorbitan fatty acid ester, so that the solubility of the polymer microspheres in water is improved, and the amount of the microspheres is reduced.
The penetrating agent is modified di-sec-octyl sulfosuccinate sodium salt, and the preparation method of the penetrating agent comprises the following specific steps: aromatic alcohol and diethylene diacetic acid are used as raw materials, and one or two of toluene sulfonic acid and 4-dimethylamino pyrimidine are combined; the sulfonating agent is obtained by esterification reaction under the action of concentrated sulfuric acid and sulfonation reaction under the action of chlorosulfonic acid, wherein the mass ratio of the aromatic alcohol to the diethylene diacetic acid to the catalyst to the sulfonating agent is 25: 1: 10: 15; the dispersing agent is ethylene bis stearamide, and prevents the solid reduced microspheres from settling and agglomerating to block pore throats. The anti-swelling and anti-swelling agent is a condensate of epichlorohydrin-polyethylene polyamine, and can stabilize clay for a long time and prevent the clay from swelling and condensation polymerization.
The method comprises the following steps: and stirring 35% of water reducing agent, 12.5% of solubilizer, 6.5% of penetrating agent, 6.5% of dispersant, 2.5% of anti-swelling and anti-swelling agent and the balance of water according to the proportion at 65 ℃ until the materials are uniformly mixed to obtain the blocking remover.
The blocking remover can be injected into the bottom of a well through a pump truck, and the mass ratio of the blocking remover to microspheres in the profile control well is 1: 1. as can be seen from table 1 and fig. 1, the blocking remover can allow the polymer microspheres to rapidly lose water, and the microsphere volume becomes small, thereby achieving the purpose of blocking removal.
The experimental results are as follows:
experimental determination, the earth acid and the blocking remover of the examples 2 to 4 are respectively mixed with the core powder polluted by the polymer microspheres, and after reaction for 4 hours at 60 ℃, the experimental result is observed (see table 1 and figure 1);
table 1 shows the conditions of the polymer microspheres after the reaction
The experimental results are shown in table 1 and fig. 1, and it can be seen that after the earth acid is mixed with the core powder contaminated by the polymer microspheres, the acid solution can only dissolve part of the core, but cannot dissolve the polymer microspheres, cannot reduce the polymer microspheres, and even part of the microspheres can be enlarged when contacting water; and the microspheres become small and are dispersed in the solution by using the aqueous solution of the blocking remover.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. A blocking remover is characterized in that: the blocking remover is prepared from the following raw materials in percentage by mass: 30-40% of water reducing agent, 10-15% of solubilizer, 5-8% of penetrating agent, 5-8% of dispersing agent, 2-3% of anti-swelling and anti-swelling agent and the balance of water.
2. The deblocking agent of claim 1, wherein: the water reducing agent is a mixed solution of an HSB aliphatic high-efficiency water reducing agent, sodium lignosulfonate, organic silicon potassium humate and water, and the volume ratio of the HSB aliphatic high-efficiency water reducing agent to the sodium lignosulfonate to the organic silicon potassium humate to the water is (10-30): (1-15): (3-15): (40-70).
3. The deblocking agent of claim 1, wherein: the solubilizer is polyoxyethylene sorbitan fatty acid ester.
4. The deblocking agent of claim 1, wherein: the penetrating agent is modified di-sec-octyl sulfosuccinate sodium salt.
5. The deblocking agent of claim 1, wherein: the dispersing agent is ethylene bis stearamide.
6. The deblocking agent of claim 1, wherein: the anti-swelling and anti-swelling agent is a condensate of epichlorohydrin-polyethylene polyamine.
7. Use of the agent according to claim 1 for profile control well plugging with a reduced microsphere volume, wherein: the specific blockage removing steps are as follows: the blocking remover is injected into the bottom of the profile control well, so that the blocking removal can be realized; the mass ratio of the blocking remover to the microspheres in the profile control well is 1: (1-10).
8. A preparation method of the blocking remover is characterized by comprising the following steps: the preparation method comprises the following specific steps: stirring 30-40% by mass of a water reducing agent, 10-15% by mass of a solubilizer, 5-8% by mass of a penetrating agent, 5-8% by mass of a dispersing agent, 2-3% by mass of an anti-swelling and shrinking agent and the balance of water at 60-70 ℃ until the materials are uniformly mixed to obtain the blocking remover.
9. A preparation method of a penetrant is characterized by comprising the following steps: the preparation method comprises the following specific steps: taking aromatic alcohol and diethylene diacetic acid as raw materials, carrying out esterification reaction under the action of a catalyst, and then carrying out sulfonation reaction with a sulfonating agent to obtain modified di-sec-octyl sulfosuccinate sodium salt; the mass ratio of the aromatic alcohol to the diethylene diacetic acid to the catalyst to the sulfonating agent is (1-50): (1-50): (1-20): (1-30).
10. A method of preparing an osmotic agent according to claim 9, wherein: the catalyst is one or the combination of two of toluenesulfonic acid and 4-dimethylamino pyrimidine; the sulfonating agent is one or the combination of concentrated sulfuric acid and chlorosulfonic acid.
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