CN101570687B - Oilfield injection friction-reducing agent and application thereof - Google Patents
Oilfield injection friction-reducing agent and application thereof Download PDFInfo
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- CN101570687B CN101570687B CN2008101056530A CN200810105653A CN101570687B CN 101570687 B CN101570687 B CN 101570687B CN 2008101056530 A CN2008101056530 A CN 2008101056530A CN 200810105653 A CN200810105653 A CN 200810105653A CN 101570687 B CN101570687 B CN 101570687B
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Abstract
The invention relates to an injection friction-reducing agent for improving the injection capacity of a water injection well of an extra-low permeability reservoir of an oilfield, and application thereof. The injection friction-reducing agent comprises the following compositions by weight percent: (a) 0.8 to 8 weight percent of amine compounds; (b) 1.2 to 12 weight percent of composite carboxylate; (c) 1.7 to 17 weight percent of composite quaternary ammonium salt cationic surfactant; (d) 0.4 to 4 weight percent of combined surfactant containing alkyl polyhydric alcohol ether; and the balanceof water. The invention is used for the oilfield injection friction-reducing agent, wherein the dosage of a single well is between 8 and 10 tons; the working concentration is between 2,000 and 5,000 mg/L; the injection pressure is reduced to be between 2 and 5 MPa; the effective period of stable injection capacity is more than 12 months; and the interfacial tension of the oilfield injection friction-reducing agent and crude oil under the condition of stratum can reach 10<-1> mN/m magnitude order.
Description
Technical field:
The present invention relates to a kind of water filling friction reducer and application thereof that improves oil field special low permeability reservoir water injection well water-injection capability.
Background technology
Water injection pressure is too high, water injection rate is difficult to reach the balancing between injection and production requirement, oilwell produced fluid amount reduces, output descends has become the subject matter of restriction waterflooding extra permeability oilfield soon.
In recent years, more domestic low permeability oil fields have been carried out low level of surfactant step-down augmented injection experimental study in succession.According to the literature, use the ZP-1918 system of forming by the multicomponent high molecular tensio-active agent, oil water interfacial tension can be reduced to 10
-2The mN/m order of magnitude, this system shows in the step-down augmented injection rig-site utilization result of low-permeability oilfields such as grand celebration, Central Plains, triumph: 0.1～0.3% promoting agent system can make water-injection capability improve more than 50%, pressure decline 2-20MPa, the average effective phase is more than 200 days.Daqing Oilfield Company towards the open drain oil field, has been carried out the tensio-active agent step-down augmented injection test in place of 4 mouthfuls of wells in peripheral hyposmosis, and wherein two mouthfuls of wells have been seen good result.Its applied tensio-active agent ES system is the compound system of anion surfactant and nonionogenic tenside, and under reservoir condition, this system can be reduced to 10 with oil water interfacial tension
-2The mN/m order of magnitude.
Single use tensio-active agent reduces water injection pressure, and centering, high permeability oil reservoir are suitable for.But for special low permeability reservoir, it is apparent in view that it improves oil-water displacement efficiency, because special low permeability reservoir pore throat is tiny, reach 0.4～1um, and chink content obviously increases in the hole, cause the single surfactant system inapplicable aspect reduction water drive injection pressure, very high in special low permeability reservoir displacement of reservoir oil by filling water initial stage injection pressure.
Summary of the invention
The purpose of this invention is to provide a kind of raising water-injection capability, reduce injection pressure, being suitable for pore throat is the special low permeability reservoir of 0.4～1um, the obvious higher oilfield injection friction-reducing agent of chink content in the hole.
A kind of oilfield injection friction-reducing agent that improves special low permeability reservoir water injection well water-injection capability of the present invention is a kind of composition.This composition be can be miscible with water composition, its composition comprises by weight: (a) 0.8～8% amine compound, (b) 1.2～12% compound carboxylate salt, (C) 1.7～17% compound quaternary ammonium salt cats product, (d) 0.4～4% the compound surfactant that contains alkyl polyols ether.The water injection well stimulation agent of being prepared by this system can reach 10 with the interfacial tension of crude oil under formation condition
-1The mN/m order of magnitude.
(a) amine compound
In quadrol, thanomin, N.N-dimethyl formamide, the N.N-Diethyl Aniline one or both.
(b) compound carboxylate salt
Compound carboxylate salt is any two kinds in monobasic in MALEIC ANHYDRIDE, vinylformic acid, acrylate, the 2-acrylamide-2-methyl propane sulfonic acid or the multiple copolymer.Compound ratio be 1: 1 or arbitrarily than.
(C) compound quaternary ammonium salt cats product
The compound quaternary ammonium salt cats product is any two kinds in chloroethyl dimethyl benzyl ammonium chloride, chloroethyl trimethyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride or the Dodecyl trimethyl ammonium chloride, and compound ratio is 1: 1.
(d) contain the compound surfactant of alkyl polyols ether
The compound surfactant that contains alkyl polyols ether is 12～hexadecyl binary or polyol ethers.Compound ratio be 1: 1 or arbitrarily than.
Contain the tensio-active agent that can reduce interfacial tension in the composition product, the interfacial tension with certain crude oil under 0.1% concentration reaches 0.7mN/m.Have the component that can carry out corrosion to mineral such as chlorite, ferroan calcite in the rock oil reservoir cementing matter, each cations analysis in the solution behind the composition product core dissolved corrosion test is found, after reacting with said composition solution and core, Ca in the solution
2+Concentration reaches 5063mg/L, than the Ca in the solution of tap water corrosion core
2+Concentration is high more than 1400 times, Fe in the solution
3+Concentration reaches 1258mg/L, Mg
2+Concentration reaches 643mg/L.Particularly, after composition and the reaction of core calking mineral, corrosion liquid and resident fluid have good compatibleness.
The effect of invention
Described composition is used for water injection well stimulation, 8～10 tons of individual well consumptions, and working concentration 2000～5000mg/L, water injection pressure reduces by 2～5MPa, and the validity period of stablizing water-injection capability is more than 12 months.The water injection well stimulation agent of being prepared by this system can reach 10 with the interfacial tension of crude oil under formation condition
-1The mN/m order of magnitude.
Embodiment
Embodiment 1
Earlier in being 1000 liters enamel reaction still, a capacity adds quantitative water, the adding weight content is 0.8% quadrol, stir, measure the pH value of solution, the adding weight content is 1.2% MALEIC ANHYDRIDE and acrylic-multipolymer, stirring and dissolving is complete, add weight content more successively and be 1.7% chloroethyl dimethyl benzyl ammonium chloride and chloroethyl trimethyl ammonium chloride (compound ratio is 1: 1), weight content and be 0.4% hexadecyl glycol ether, surplus is a water, stir, both must this product.
Described composition is used for oilfield injection friction-reducing agent, 8～10 tons of individual well consumptions, working concentration 2000～5000mg/L.
Embodiment 2
Earlier in being 1000 liters enamel reaction still, a capacity adds quantitative water, the adding weight content is 8% thanomin, stir, measure the pH value of solution, add weight content and be 12% acrylate and the membered copolymer in 2-acrylamide-2-methyl propane sulfonic acid, stirring and dissolving is complete, add weight content more successively and be 17% dodecyl benzyl dimethyl ammonium chloride and Dodecyl trimethyl ammonium chloride (compound ratio is 1: 1), weight content and be 4% dodecyl polyol ethers, surplus is a water, stir, both must this product.
Described composition is used for oilfield injection friction-reducing agent, 8～10 tons of individual well consumptions, working concentration 2000～5000mg/L.
Embodiment 3
The water that in a capacity is 1000 liters enamel reaction still, adds earlier set weight, the adding weight content is 4% N.N-dimethyl formamide, stir, measure the pH value of solution, the adding weight content is 6% compound carboxylate salt, and stirring and dissolving is complete, add weight content more successively and be 10% acrylate and 2-acrylamide, weight content and be 1% 12 and hexadecyl glycol ether, surplus is a water, stirs, both must this product.
Described composition is used for oilfield injection friction-reducing agent, 8～10 tons of individual well consumptions, working concentration 2000～5000mg/L.
Embodiment 4
The water that in a capacity is 1000 liters enamel reaction still, adds earlier set weight, at first add weight content and be 2% quadrol and thanomin, stir, measure the pH value of solution, the adding weight content is 10% MALEIC ANHYDRIDE and acrylic-multipolymer, stirring and dissolving is complete, add weight content more successively and be 10% chloroethyl dimethyl benzyl ammonium chloride and Dodecyl trimethyl ammonium chloride, weight content and be 2% 12 and hexadecyl polyol ethers, surplus is a water, stir, both must this product.
Described composition is used for oilfield injection friction-reducing agent, 8～10 tons of individual well consumptions, working concentration 2000～5000mg/L.
Claims (4)
1. oilfield injection friction-reducing agent, it is characterized in that: its composition comprises: (a) weight content is 0.8～8% amine compound, (b) weight content is 1.2～12% compound carboxylate salt, (C) weight content is 1.7～17% compound quaternary ammonium salt cats product, (d) weight content is 0.4～4% the compound surfactant that contains alkyl polyols ether, and surplus is a water;
Described amine compound is quadrol, thanomin, N, dinethylformamide or N, one or both in the N-Diethyl Aniline;
Described compound carboxylate salt is any two kinds in the multiple copolymer of MALEIC ANHYDRIDE, vinylformic acid, acrylate, 2-acrylamide-2-methyl propane sulfonic acid, and compound ratio is 1: 1.
2. a kind of oilfield injection friction-reducing agent according to claim 1, it is characterized in that: (C) the compound quaternary ammonium salt cats product is in chloroethyl dimethyl benzyl ammonium chloride, chloroethyl trimethyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, the Dodecyl trimethyl ammonium chloride any two kinds, and compound ratio is 1: 1.
3. a kind of oilfield injection friction-reducing agent according to claim 1 is characterized in that: the compound surfactant that (d) contains alkyl polyols ether is 12～hexadecyl binary or polyol ethers any two kinds, and compound ratio is 1: 1.
4. the application of a kind of oilfield injection friction-reducing agent according to claim 1 is characterized in that: be used for oilfield injection friction-reducing agent, 8～10 tons of individual well consumptions, working concentration 2000～5000mg/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101056530A CN101570687B (en) | 2008-04-30 | 2008-04-30 | Oilfield injection friction-reducing agent and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101056530A CN101570687B (en) | 2008-04-30 | 2008-04-30 | Oilfield injection friction-reducing agent and application thereof |
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| Publication Number | Publication Date |
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| CN101570687A CN101570687A (en) | 2009-11-04 |
| CN101570687B true CN101570687B (en) | 2011-08-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643635B (en) * | 2012-04-13 | 2013-11-06 | 中国石油天然气股份有限公司 | Stratum water-injection augmented injection agent of oil field |
| CN103450471B (en) * | 2013-09-04 | 2016-03-02 | 中国海洋石油总公司 | A kind of composite natural gas flow improver and preparation method thereof |
| CN103602329B (en) * | 2013-12-04 | 2016-03-30 | 黑龙江勇峰化工添加剂有限公司 | A kind of pressure break flow improver |
| CN105802600B (en) * | 2016-03-29 | 2018-11-23 | 大庆市富杰化工有限公司 | A kind of pressure reducing and injection increasing agent used for flooding well and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511920A (en) * | 2002-12-27 | 2004-07-14 | 山东师范大学 | Novel crude oil drag reduction and viscosity reducing agent |
| CN1778862A (en) * | 2004-11-17 | 2006-05-31 | 中国石油化工股份有限公司 | Inspissated oil emulsion viscidity reducer |
| US7157409B2 (en) * | 2002-09-25 | 2007-01-02 | M-I Llc | Surfactant-polymer compositions for enhancing the stability of viscoelastic-surfactant based fluid |
| CN101100601A (en) * | 2007-07-31 | 2008-01-09 | 中国石油天然气股份有限公司 | Corrosion-release scale-proof wax-removal viscosity-reducing agent and preparation method thereof |
| WO2008020388A2 (en) * | 2006-08-17 | 2008-02-21 | Schlumberger Canada Limited | Friction reduction fluids |
-
2008
- 2008-04-30 CN CN2008101056530A patent/CN101570687B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7157409B2 (en) * | 2002-09-25 | 2007-01-02 | M-I Llc | Surfactant-polymer compositions for enhancing the stability of viscoelastic-surfactant based fluid |
| CN1511920A (en) * | 2002-12-27 | 2004-07-14 | 山东师范大学 | Novel crude oil drag reduction and viscosity reducing agent |
| CN1778862A (en) * | 2004-11-17 | 2006-05-31 | 中国石油化工股份有限公司 | Inspissated oil emulsion viscidity reducer |
| WO2008020388A2 (en) * | 2006-08-17 | 2008-02-21 | Schlumberger Canada Limited | Friction reduction fluids |
| CN101100601A (en) * | 2007-07-31 | 2008-01-09 | 中国石油天然气股份有限公司 | Corrosion-release scale-proof wax-removal viscosity-reducing agent and preparation method thereof |
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| CN101570687A (en) | 2009-11-04 |
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