CN103788938B - Retarded acid for low-permeability sandstone reservoir acidification - Google Patents
Retarded acid for low-permeability sandstone reservoir acidification Download PDFInfo
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- CN103788938B CN103788938B CN201210432310.1A CN201210432310A CN103788938B CN 103788938 B CN103788938 B CN 103788938B CN 201210432310 A CN201210432310 A CN 201210432310A CN 103788938 B CN103788938 B CN 103788938B
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- acid
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- sandstone reservoir
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
- C09K8/604—Polymeric surfactants
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- 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
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- 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a retarded acid for low-permeability sandstone reservoir acidification. Raw materials of the retarded acid comprise 8-15 parts by weight of a main acid, 20-25 parts by weight of an oil phase, 6-8 parts by weight of an emulsifier, 3-4 parts by weight of a cosurfactant and 50-60 parts by weight of water. The main acid is mud acid or multi-hydrogen acid. The oil phase is kerosene. The emulsifier is a liquid mixture of nonylphenol ethoxylate with a hydrophilic-lipophilic balance being 15 and hexadecyltrimethylammonium chloride in a weight ratio of 1:1.5-2.0. The cosurfactant is a liquid mixture of n-butanol and n-octanol in a weight ratio of 1:1-2. The retarded acid can effectively reduce the reaction speed by 30% and reduce the corrosion rate of steel plates by 85%.
Description
Technical field
The present invention relates to technical field of petrochemical industry, more particularly, to a kind of low permeability sandstone reservoir acidifying retarded acid.
Background technology
Mud acid is a kind of modal acid fluid system of acidizing sandstone oil reservoir, it be hydrochloric acid and Fluohydric acid. in varing proportions
The mixed acid of composition.Sandstone oil reservoir mud acid processes the permeability that with past release formation damage, can improve near wellbore zone, as
Oilfield stimulation measure has certain effect.But acid-rock reaction excessive velocities make acid lose activity quickly to become in conventional acidulation
Residual acid, causes sandstone acidizing process range less, if increasing existing acid solution consumption can not expand effective process radius, Zhi Nengzao
Become the excessive corrosion near wellbore zone, and earth formation deep injury can not be efficiently treated.And between acid, residue, crude oil etc.
The reactant that interaction secondary response produces can block hole and throat, reduces reservoir permeability on the contrary.
Content of the invention
The purpose of the present invention is intended to overcome the deficiencies in the prior art, provides one kind can delay acid-rock reaction speed, effectively
The acid fluid system of suppression secondary precipitation, the low permeability sandstone reservoir acidifying of the overall development effectiveness improving low permeability sandstone reservoir is slow
Speed acid.
The purpose of the present invention can be achieved by the following technical measures：
This low permeability sandstone reservoir acidifying retarded acid is made up of the raw material of following proportion by weight：
Main acid 8-15 oil phase 20-25 emulsifying agent 6-8
Cosurfactant 3-4 water 50-60.
The purpose of the present invention also can be achieved by the following technical measures：
Described main acid is mud acid or MH acid；Described oil phase is kerosene；Described emulsifying agent is polyoxyethylene nonyl phenyl
Vinyl Ether -15：Hexadecyltrimethylammonium chloride=1：1.5-2.0 the mixed liquor of proportion by weight；Described helps surface activity
Agent is n-butyl alcohol：N-octyl alcohol=1：The mixed liquor of 1-2 proportion by weight；Described mud acid is hydrochloric acid：Fluohydric acid .=11：2.5-
3.5 mass parts；Described MH acid is diethylene triamine pentamethylene phosphonic：Ammonium acid fluoride：Hydrochloric acid=6:5.5-6.5:1.5-2.5
Mass parts., in terms of pure hydrogen chloride, Fluohydric acid. is in terms of pure fluohydric acid gas for hydrochloric acid of the present invention.
The present invention emulsifying agent and cosurfactant is added in oil phase and stirs, then slow with stirring
Add main acid and water, form the low permeability sandstone reservoir retarded acid that homogeneous transparent system is the present invention.
The retarded acid of the present invention has advantages below：
(1) after the low permeability sandstone reservoir retarded acid of the present invention enters formation pore venturi, live in the surface in retarded acid
Property agent can adsorb on slow acid solution and crude oil interface, significantly reduce alternate tension force, make retarded acid in formation pore space
There is high diafiltration ability.Due to the high diafiltration property of retarded acid, in acidizing treatment, this acid solution can enter remote well area, effectively releases
Earth formation deep pollutes, and improves the permeability of reservoir.
（2）Retarded acid relies on the package action of the outer acid relatively of oil, stops H+Diffusion and migration, effectively slow down acid-rock reaction
Speed, amplitude peak extends the acid-rock reaction time, increases the deep penetration range of acid solution.
（3）Because the ratio of viscosities of retarded acid is high with concentration acid liquid viscosity, by improving weary acid energy can be carried to microgranule
Power, increases the row's of returning ability, reduces the secondary precipitation injury in acidization.
The low permeability sandstone reservoir retarded acid of table 1. present invention（Main body acid solution is mud acid）With SiO2Corrosion rate result of the test
As following table：
Test proves, the low permeability sandstone reservoir retarded acid of the present invention is slow compared with the mud acid under the conditions of same concentrations to imitate
Fruit is substantially.
The low permeability sandstone reservoir retarded acid of table 2. present invention（Main body acid solution is MH acid）With SiO2Corrosion rate test knot
Fruit such as following table：
The low permeability sandstone reservoir retarded acid of the present invention is to SiO2Corrosion speed be significantly lower than same concentrations under the conditions of
MH acid.
The low permeability sandstone reservoir retarded acid of table 3. present invention（Main body acid solution is MH acid）With N80 steel disc corrosion testing knot
Fruit such as following table：
| Acid solution | Response time/h（Hour） | Corrosion rate g/m2·h |
| MH acid | 4 | 46.99 |
| Retarded acid | 4 | 6.95 |
Under the conditions of the low permeability sandstone reservoir retarded acid of the present invention is significantly less than same concentrations to the corrosion rate of N80 steel disc
MH acid, rate of corrosion reduces 85.21%.
Specific embodiment：
According to NPE -15：Hexadecyltrimethylammonium chloride=1：1.5 proportion by weight mixing, or
According to NPE -15：Hexadecyltrimethylammonium chloride=1：2.0 proportion by weight mixing, gained mixed liquor
For emulsifying agent of the present invention.
According to n-butyl alcohol：N-octyl alcohol=1：1 proportion by weight mixing, or according to n-butyl alcohol：N-octyl alcohol=1：2 mass parts are joined
Ratio mixing, gained mixed liquor is cosurfactant of the present invention.
According to hydrochloric acid（In terms of pure hydrogen chloride）：Fluohydric acid.（In terms of pure fluohydric acid gas）=11：3.5 proportion by weight mixing, or
According to hydrochloric acid（In terms of pure hydrogen chloride）：Fluohydric acid.（In terms of pure fluohydric acid gas）=11：2.5 proportion by weight mixing, gained mixed liquor
For mud acid of the present invention.
According to diethylene triamine pentamethylene phosphonic：Ammonium acid fluoride：Hydrochloric acid（In terms of pure hydrogen chloride）=6:6.5:1.5 mass parts
Proportioning mixes, or according to diethylene triamine pentamethylene phosphonic：Ammonium acid fluoride：Hydrochloric acid（In terms of pure hydrogen chloride）=6:5.5:2.5 quality
Part proportioning mixing, gained mixed liquor is MH acid of the present invention.
Embodiment 1：
Take 6 kilograms of emulsifying agents and 4 kilograms of cosurfactants to be added in 20 kilograms of kerosene, stir, then side is stirred
Mix side and be slowly added to 15 kilograms of mud acids and 50 kg of water, mixing and stirring to transparent system, is of the present invention hypotonic
Sandstone oil reservoir retarded acid thoroughly.
Embodiment 2：
Take 8 kilograms of emulsifying agents and 3 kilograms of cosurfactants to be added in 25 kilograms of kerosene, stir, then side is stirred
Mix side and be slowly added to 8 kilograms of mud acids and 60 kg of water, mixing and stirring to transparent system, is hyposmosis of the present invention
Sandstone oil reservoir retarded acid.
Embodiment 3：
Take 7 kilograms of emulsifying agents and 3.5 kilograms of cosurfactants to be added in 22 kilograms of kerosene, stir, Ran Houbian
Stirring side is slowly added to 11 kilograms of mud acids and 55 kg of water, and mixing and stirring to transparent system, is of the present invention low
Permeability sandstone oil reservoir retarded acid.
Embodiment 4：
Replace mud acid with MH acid, others were same as embodiment 1-3.
Claims (1)
1. low permeability sandstone reservoir acidifying retarded acid is it is characterised in that it is made up of the raw material of following proportion by weight：
Described MH acid is by diethylene triamine pentamethylene phosphonic：Ammonium acid fluoride：Hydrochloric acid=6:5.5-6.5:1.5-2.5 quality
Part proportioning mixes, and wherein hydrochloric acid is in terms of pure hydrogen chloride；
Described emulsifying agent is by NPE -15：Hexadecyltrimethylammonium chloride=1：1.5-2.0 mass parts
Proportioning mixes；
Described cosurfactant is by n-butyl alcohol：N-octyl alcohol=1：1-2 proportion by weight mixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210432310.1A CN103788938B (en) | 2012-11-02 | 2012-11-02 | Retarded acid for low-permeability sandstone reservoir acidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210432310.1A CN103788938B (en) | 2012-11-02 | 2012-11-02 | Retarded acid for low-permeability sandstone reservoir acidification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103788938A CN103788938A (en) | 2014-05-14 |
| CN103788938B true CN103788938B (en) | 2017-02-08 |
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| CN201210432310.1A Expired - Fee Related CN103788938B (en) | 2012-11-02 | 2012-11-02 | Retarded acid for low-permeability sandstone reservoir acidification |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327809A (en) * | 2014-11-03 | 2015-02-04 | 河北光大石化有限公司 | Fluid loss agent for drilling fluid and preparation method of fluid loss agent |
| CN105670599A (en) * | 2014-11-20 | 2016-06-15 | 中国石油化工股份有限公司 | High-temperature sandstone oil reservoir retarded acid and preparation method thereof |
| CN106520098A (en) * | 2015-09-10 | 2017-03-22 | 中国石油化工股份有限公司 | Acidic stuck freeing solution for drilling and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760313A (en) * | 2005-10-18 | 2006-04-19 | 中国石油大学(华东) | High temperature proof acid-in-oil emulsion in low friction resistance |
| CN101089118A (en) * | 2006-06-16 | 2007-12-19 | 长江大学 | Acidifying agent composition |
| CN101121884A (en) * | 2007-09-27 | 2008-02-13 | 西南石油大学 | Method for preparing dual slow multi-hydrogen acid acidification system |
-
2012
- 2012-11-02 CN CN201210432310.1A patent/CN103788938B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760313A (en) * | 2005-10-18 | 2006-04-19 | 中国石油大学(华东) | High temperature proof acid-in-oil emulsion in low friction resistance |
| CN101089118A (en) * | 2006-06-16 | 2007-12-19 | 长江大学 | Acidifying agent composition |
| CN101121884A (en) * | 2007-09-27 | 2008-02-13 | 西南石油大学 | Method for preparing dual slow multi-hydrogen acid acidification system |
Non-Patent Citations (2)
| Title |
|---|
| 微乳多氢酸体系的制备及性能研究;党绢华等;《精细石油化工进展》;20120331;第13卷(第3期);18-20 * |
| 柴油微乳土酸的制备及其性能研究;乔立杰等;《高校化学工程学报》;20090815(第04期);684-689 * |
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| CN103788938A (en) | 2014-05-14 |
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