CN104017554A - Composite surfactant oil-displacement system as well as preparation method and application thereof - Google Patents
Composite surfactant oil-displacement system as well as preparation method and application thereof Download PDFInfo
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- CN104017554A CN104017554A CN201410271113.5A CN201410271113A CN104017554A CN 104017554 A CN104017554 A CN 104017554A CN 201410271113 A CN201410271113 A CN 201410271113A CN 104017554 A CN104017554 A CN 104017554A
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- polyoxyethylene ether
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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Abstract
The invention discloses a composite surfactant oil-displacement system. The composite surfactant oil-displacement system comprises the following components in percentage by mass: 0.5-1% of fatty alcohol polyoxyethylene ether, 0.1-0.3% of alkyl phenol polyoxyethylene ether, 5-7% of epoxy propanesulfonic acid glycidol butyl ether copolymer, 2-4% of an organic co-solvent and the balance of injection water. The composite surfactant oil-displacement system disclosed by the invention is reasonable in formula; by a mutual synergic effect between the polymer and surfactant, the composite surfactant oil-displacement system has relatively strong salt resistance and high temperature performance, the interfacial tension of the system can be effectively reduced, the oil-displacement effect is good and the recovery rate of the crude oil can be greatly enhanced. The invention also discloses a method for preparing a composite surfactant oil-displacement system. The method comprises the steps of mixing fatty alcohol polyoxyethylene ether, alkyl phenol polyoxyethylene ether, epoxy propanesulfonic acid glycidol butyl ether copolymer and organic co-solvent according to a ratio, adding the balance of water, carrying out ultrasonic oscillation and standing in vacuum. The preparation method has the advantages of simple steps, strong operability and low cost and is applicable to the large-scale industrial production.
Description
Technical field
The present invention relates to a kind of oil-displacing agent, especially relate to a kind of complexed surfactant flooding system and preparation method thereof, application.
Background technology
The exploitation in oil field is mainly divided into primary oil recovery, secondary oil recovery and tertiary oil recovery.The primary oil recovery in oil field and secondary oil recovery approximately can only extraction crude oil total amount 1/3 left and right, remaining 2/3 crude oil just need to be exploited by tertiary oil recovery technology.In tertiary oil recovery, mainly by adding the materials such as a certain amount of polymkeric substance, tensio-active agent, alkali, improve involving scope, change viscosity of crude and reducing water termination tension force of injected water, reach the wettability that regulates bottom surface, improve capillary number, increase the dispersiveness of crude oil in water, change the object of rheological characteristic of crude oil, thereby increase substantially the recovery ratio of crude oil.Tertiary oil recovery technology has become the major measure that oil recovery factor improves in China.
Water drive cannot overcome the suffered capillary force of irreducible oil, the attached power of slitting and force of cohesion separately, be difficult to oil to displace, add suitable tensio-active agent in injected water after, can greatly reduce the interfacial tension between injected water and stratum irreducible oil, by irreducible oil displacement out, improve recovery ratio.
Surfactant oil displacement mainly contains anion surfactant, nonionogenic tenside and amphoterics.But simple surface active agent composition and function singleness, salt tolerance or resistance to elevated temperatures are poor, are difficult to further improve the recovery ratio of crude oil, and its application is restricted.
Summary of the invention
The object of the invention is for a kind of complexed surfactant flooding system is provided, polymkeric substance and tensio-active agent are carried out composite, compatibility is reasonable, utilizes polymkeric substance and tensio-active agent synergy between the two, oil displacement efficiency is good, can greatly improve the recovery ratio of crude oil.
The present invention also provides a kind of preparation method of complexed surfactant flooding system, and this preparation method's processing step is simple, workable, and cost is low, is applicable to large-scale industrial production.
To achieve these goals, the present invention is by the following technical solutions:
A kind of complexed surfactant flooding system, its component by following quality percentage composition forms: fatty alcohol-polyoxyethylene ether 0.5～1%, alkylphenol polyoxyethylene 0.1～0.3%, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer 5～7%, organic cosolvent 2～4%, injected water surplus.The present invention is optimized design to the formula of flooding system, compatibility is reasonable, by polymkeric substance and tensio-active agent are carried out composite, utilize the mutual synergy between each component, make the present invention there is stronger anti-salt property and resistance to elevated temperatures, and can effectively reduce interface tension force, oil displacement efficiency is good, can greatly improve the recovery ratio of crude oil.
As preferably, described organic cosolvent is butanols or Virahol.
A kind of preparation method of complexed surfactant flooding system, after fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer are mixed by proportioning with organic cosolvent, the water that adds surplus, after sonic oscillation 10～30min under vacuum condition standing 1～2h.Preparation method's process of the present invention is simple, easy to operate, and by being mixed, it is standing that wherein sonic oscillation coordinates vacuum, to guarantee homogeneity and the stability of whole flooding system.
The application of a kind of complexed surfactant flooding system when three displacement of reservoir oils.
Therefore, the present invention has following beneficial effect:
(1) formula of flooding system is optimized to design, compatibility is reasonable, by polymkeric substance and tensio-active agent are carried out composite, utilize the mutual synergy between each component, make the present invention there is stronger anti-salt property and resistance to elevated temperatures, and can effectively reduce interface tension force, oil displacement efficiency is good, can greatly improve the recovery ratio of crude oil;
(2) preparation method's process of the present invention is simple, easy to operate, by being mixed, and coordinates vacuum standing to guarantee homogeneity and the stability of whole flooding system by sonic oscillation.
Embodiment
Below by embodiment, the present invention will be further described.
In the present invention, if not refer in particular to, all per-cent is weight unit, all devices and raw material all can be buied from market or the industry is conventional, method in following embodiment, if no special instructions, be this area ordinary method, wherein, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer in each embodiment can pass through (a kind of preparation of sulfonic acid polyether surfactant and dynamic surface tension, old state just etc., applied chemistry, the 24th the 2nd phase of volume of February in 2007) in preparation method's preparation of recording.
Embodiment 1
A complexed surfactant flooding system, its component by following quality percentage composition forms: fatty alcohol-polyoxyethylene ether 0.5%, alkylphenol polyoxyethylene 0.1%, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer 5%, Virahol 2%, injected water surplus.
This complexed surfactant flooding system makes by the following method: after fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer are mixed by proportioning with organic cosolvent, the water that adds surplus, after sonic oscillation 10min under vacuum condition standing 1h.
Embodiment 2
A complexed surfactant flooding system, its component by following quality percentage composition forms: fatty alcohol-polyoxyethylene ether 0.7%, alkylphenol polyoxyethylene 0.2%, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer 6%, Virahol 3%, injected water surplus.
This complexed surfactant flooding system makes by the following method: after fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer are mixed by proportioning with organic cosolvent, the water that adds surplus, after sonic oscillation 20min under vacuum condition standing 1.5h.
Embodiment 3
A complexed surfactant flooding system, its component by following quality percentage composition forms: fatty alcohol-polyoxyethylene ether 1%, alkylphenol polyoxyethylene 0.3%, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer 7%, butanols 4%, injected water surplus.
This complexed surfactant flooding system makes by the following method: after fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer are mixed by proportioning with organic cosolvent, the water that adds surplus, after sonic oscillation 30min under vacuum condition standing 2h.
Concrete application method of the present invention is: after water drive, then the alkali-free hyposmosis displacing surfactant system of the present invention of metaideophone 0.3～0.5PV (rock pore volume) carries out the displacement of reservoir oil.
Imitation oil displacement experiment test
The flooding system respectively each embodiment being obtained carries out imitation oil displacement experiment test, and the method for imitation oil displacement experiment test is: by Simulated Water, (Simulated Water ionic group becomes: Na
+with K
+for 3091.96mg/L, Ca
2+for 276.17mg/L, Mg
2+for 158.68mg/L, CO
3 2+for 14.21mg/L, HCO
3 -for 311.48mg/L, SO
4 2-for 85.92mg/L, C1
-for 5436.34mg/L, TDS is 9374.13) rock core (tri-layers of heterogeneous body side's rock core of 30cm) is saturated, measure the volume of voids (115.78ml) of rock core, then crude oil (1700mpa.s, 65 ℃) carry out saturated, at 65 ℃, carry out imitation oil displacement experiment, first water drive to water-content is 95%, survey water drive and improve crude oil taking rate, the flooding system that each embodiment of metaideophone 0.3PV (rock pore volume) obtains again, the displacement of reservoir oil more than 98%, is surveyed and can improve oil recovery factor again on water drive basis to water-content, shown in test-results following table:
| Project | Oil recovery factor after water drive | Improve recovery ratio |
| Embodiment 1 | 26.12％ | 57.41％ |
| Embodiment 2 | 25.43％ | 58.32％ |
| Embodiment 3 | 26.48％ | 60.4％ |
As can be seen from the table, under the condition of high salt, high temperature, metaideophone is of the present invention without after complexed surfactant flooding system, can improve oil recovery factor more than at least 57%, illustrate that complexed surfactant flooding system of the present invention is high temperature resistant good with salt resistant character, and the ability of perviousness and emulsion dispersion crude oil is strong, interfacial activity and oil displacement efficiency are high, can greatly improve the recovery ratio of crude oil.
Above-described embodiment is a kind of preferably scheme of the present invention, not the present invention is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim records.
Claims (4)
1. a complexed surfactant flooding system, it is characterized in that, its component by following quality percentage composition forms: fatty alcohol-polyoxyethylene ether 0.5～1%, alkylphenol polyoxyethylene 0.1～0.3%, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer 5～7%, organic cosolvent 2～4%, injected water surplus.
2. a kind of complexed surfactant flooding system according to claim 1, is characterized in that, described organic cosolvent is butanols or Virahol.
3. the preparation method of a complexed surfactant flooding system as claimed in claim 1, it is characterized in that, after fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, epoxy propanesulfonic acid Racemic glycidol butyl ether multipolymer are mixed by proportioning with organic cosolvent, the water that adds surplus, after sonic oscillation 10～30min under vacuum condition standing 1～2h.
4. a complexed surfactant flooding system as claimed in claim 1 application when three displacement of reservoir oils.
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| CN201410271113.5A CN104017554B (en) | 2014-06-07 | 2014-06-07 | A kind of complexed surfactant oil displacement system and preparation method thereof, application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104830304A (en) * | 2015-05-25 | 2015-08-12 | 唐山冀油瑞丰化工有限公司 | Emulsified displacement-permeation oil recovery agent and preparation method thereof |
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2014
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Patent Citations (6)
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| US3792731A (en) * | 1972-05-08 | 1974-02-19 | Texaco Inc | Secondary recovery process using surfactant mixtures |
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| CN104830304A (en) * | 2015-05-25 | 2015-08-12 | 唐山冀油瑞丰化工有限公司 | Emulsified displacement-permeation oil recovery agent and preparation method thereof |
| CN104830304B (en) * | 2015-05-25 | 2017-10-13 | 唐山冀油瑞丰化工有限公司 | A kind of emulsified penetration-driving oil recovery agent and preparation method thereof |
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| CN104017554B (en) | 2016-08-24 |
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Inventor after: Gong Hujun Inventor before: Lin Nanping |
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Effective date of registration: 20160623 Address after: Taibai Road Shaanxi Beilin District 710000 city of Xi'an province No. 229 Applicant after: Northwest University Address before: Quangang District of Quanzhou City, Fujian Province town village community 362804 Huai Huai kiln No. 521 Applicant before: Lin Nanping |
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