CN102344791A - Nano-molecular deposited film composite oil displacement agent - Google Patents
Nano-molecular deposited film composite oil displacement agent Download PDFInfo
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- CN102344791A CN102344791A CN 201110199185 CN201110199185A CN102344791A CN 102344791 A CN102344791 A CN 102344791A CN 201110199185 CN201110199185 CN 201110199185 CN 201110199185 A CN201110199185 A CN 201110199185A CN 102344791 A CN102344791 A CN 102344791A
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Abstract
The invention discloses a nano-molecular deposited film composite oil displacement agent. The nano-molecular deposited film composite oil displacement agent comprises a nano-molecular deposition filming agent, Tween-80 and cetyl trimethyl ammonium bromide, wherein a mass ratio of the nano-molecular deposition filming agent to Tween-80 is 1: (0.3 to 20) and a mass ratio of the nano-molecular deposition filming agent to Tween-80 to cetyl trimethyl ammonium bromide is 1: (10 to 15): (1 to 3). The nano-molecular deposited film composite oil displacement agent can be mixed with water having a pH value of 9 to 11 to form a nano-molecular deposited film composite oil displacement agent aqueous solution having a mass fraction of 0.08%, and the nano-molecular deposited film composite oil displacement agent has good stability and oil/water surface tension reduction capabilities, and can guarantee that crude oil/nano-molecular deposited film composite oil displacement agent aqueous solution surface tension is equal to an ultra-low value of 10<-3> to 10<-4> mN/m in a wide range. A result of an oil displacement test which adopts a natural rock core, is carried out in a laboratory and is utilized for evaluating oil displacement effects proves that the nano-molecular deposited film composite oil displacement agent has high oil displacement efficiency and realizes ideal oil displacement effects.
Description
Technical field
The invention belongs to technical field of petroleum extraction, be specifically related to the used a kind of auxiliary agent of oil field oil recovery, in particular for the compound oil displacement agent of tertiary oil recovery.
Background technology
The many oil fields of China get into the high injection life in the development late stage successively, but have about 60% oil still underground can't extraction.Carrying out tertiary oil recovery, improve oil recovery factor, is to slow down China's most oil fields aging rate, keeps the crude oil in China stable yields, reduces the strategic requirement of China to the degree of dependence of external crude oil.The principal element that influences oil displacement efficiency has: the interfacial tension between (1) oil-water, and reduce interfacial tension and can increase capillary number, the capillary retention resistance is reduced; (2) blowhole wetting of surfaces property makes glossy wet surface can weaken capillary force to water-wet surface conversion the circle of crude oil is caught effect; (3) structure of blowhole and mineral composition, rock forming mineral clay content increase to increase with pore texture nonuniformity degree all makes capillary retention effect aggravation.
Aspect the research of chemical flooding, oil-displacing agent must be reduced to 10 with oil water interfacial tension
-3The mN/m or the lower order of magnitude, otherwise will not have practical value.Because simple tensio-active agent is difficult to oil water interfacial tension is reduced to 10
-3Below the mN/m, therefore, often that tensio-active agent and other chemical reagent is composite at present.
It is a kind of novel technology of reservoir sweep that molecule deposition film drives.The molecular film oil-displacement mechanism is different from traditional chemical flooding (polymer flooding, surfactant flooding, alkali drive and flooding methods such as combination flooding); It is to be to transmit medium with the aqueous solution; It is film forming power that the film molecule relies on electrostatic interaction; The effective molecule deposition of film is being electronegative rock surface; Form the nano level ultrathin membrane; Changed the reservoir surface character and with the interacting state of crude oil; Make that injecting fluid is washing away the hole process; Crude oil is easy to peel off and flows and the driven liquid displacement is come out, and reaches the purpose that improves oil recovery factor.The technology of synthesizing organic polycation molecular film through radical polymerization by epoxy chloropropane and dimethylamine is mature on the whole at present, and the subject matter of existence is that production cost is high, the shortcoming that oil displacement efficiency is low.
Summary of the invention
Technical problem to be solved by this invention is to overcome the shortcoming of above-mentioned oil-displacing agent, and a kind of with low cost, nano molecule deposition film compound oil displacement agent that oil displacement efficiency is high is provided.
Solving the problems of the technologies described above the technical scheme that is adopted is: nano molecule deposition film compound oil displacement agent of the present invention comprises nano molecule deposition film agent, tween-80, and the mass ratio of nano molecule deposition film agent and tween-80 is 1: 0.3～20; The mass ratio of preferred nano molecule deposition film agent and tween-80 is 1: 5～20, and the mass ratio that is more preferably nano molecule deposition film agent and tween-80 is 1: 10～15, and the best is 1: 15.
Nano molecule deposition film compound oil displacement agent of the present invention also can comprise cetyl trimethylammonium bromide, and the mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 10～15: 1～3; The mass ratio of preferred nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 10～15: 1.5, and the best is 1: 15: 1.5.
Above-mentioned nano molecule deposition film agent prepares as follows:
In nitrogen atmosphere; Adding 69.4g mass fraction is 50% the epoxychloropropane aqueous solution in the 250mL there-necked flask; There-necked flask is placed water-bath; The control bath temperature is 0 ℃; Add the 0.424g mass fraction and be 50% sodium sulfite aqueous solution and 0.424g mass fraction and be 50% persulfate aqueous solution; Stir; Dripping the 45.75g mass fraction with constant pressure funnel with 2～3 droplets/second speed is 40% dimethylamine agueous solution; The mol ratio of epoxychloropropane and dimethylamine is 6: 4; The sodium sulfite that adds and the quality sum of potassium peroxydisulfate are 0.8% of epoxychloropropane and dimethylamine gross masses; After dropwising with warming-in-water to 65 ℃; Isothermal reaction 5 hours; Drip 40 ℃ of decompression distillation to no liquid with Rotary Evaporators; Place 45 ℃ of vacuum drying of vacuum drying chamber 4 hours, use washing with acetone, the elimination precipitation; Boil off acetone solvent, be prepared into the nano molecule deposition film agent.
The preparation method of nano molecule deposition film compound oil displacement agent of the present invention is: according to the quality proportioning of above-mentioned raw materials; Nano molecule deposition film agent and tween-80 are mixed; Perhaps nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide are mixed, be prepared into the nano molecule deposition film compound oil displacement agent.
Cheap being easy to get of nano molecule deposition film compound oil displacement agent of the present invention, stable in properties can effectively reduce oil water interfacial tension, can guarantee in the scope of broad that oil/glassware for drinking water has ultra low interfacial tension 10
-3～10
-4MN/M estimates its oil displacement efficiency at the indoor natural core of experiment through model test of the reservoir sweep, and the result proves that oil-displacing agent oil displacement efficiency of the present invention is high, has reached oil displacement efficiency preferably.
Embodiment
To further explain of the present invention, but the invention is not restricted to these embodiment below in conjunction with embodiment.
Embodiment 1
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 6.25g
Tween-80 93.75g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 15 in the present embodiment.
Its preparation method is: the quality proportioning according to above-mentioned raw materials, nano molecule deposition film agent and tween-80 are mixed, and be prepared into the nano molecule deposition film compound oil displacement agent.
Embodiment 2
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 50g
Tween-80 50g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 1 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 3
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 40g
Tween-80 60g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 1.5 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 4
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 33.3g
Tween-80 66.7g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 2 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 5
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 25g
Tween-80 75g
The mass ratio of nano molecule deposition film agent and cetyl trimethylammonium bromide is 1: 3 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 6
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 16.67g
Tween-80 83.33g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 5 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 7
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 9.09g
Tween-80 90.91g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 10 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 8
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 4.76g
Tween-80 95.24g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 20 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 9
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 77g
Tween-80 23g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 0.3 in the present embodiment.
Its preparation method is identical with embodiment 1.
Embodiment 10
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 66.67g
Tween-80 33.33g
The mass ratio of nano molecule deposition film agent and tween-80 is 1: 0.5 in the present embodiment.
Its preparation method is identical with embodiment 1.
Regulate pH value to 9～11 of water with yellow soda ash; It is 0.08% the compound oil displacement agent aqueous solution that the nano molecule deposition film compound oil displacement agent of embodiment 1～10 preparation is mixed with massfraction; Adopt the HARK-SP rotation to drip the ultra low interfacial tension appearance and measure oil water interfacial tension; Probe temperature is 40 ℃; Testing used profit is deckle oil recovery factory deeply treating wastewater and dewatered oil; Estimate its oil displacement efficiency with natural core through model test of the reservoir sweep; Test oil is a deckle oil recovery factory dewatered oil, and test result is seen table 1.
Table 1 embodiment 1～10 compound oil displacement agent oil displacement efficiency test-results
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Interfacial tension (* 10 -3mN/m) | 0.4449 | 1.066 | 0.4499 | 0.7144 | 3.599 |
| Recovery ratio is than water drive raising value | 39.8％ | 22％ | 25％ | 21.5％ | 23％ |
| Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Embodiment 10 | |
| Interfacial tension (* 10 -3mN/m) | 1.066 | 0.1333 | 2.772 | 2.8558 | 1.116 |
| Recovery ratio is than water drive raising value | 23％ | 38.5％ | 33.8％ | 11.5％ | 11.5％ |
Visible by table 1, nano molecule deposition film agent and tween-80 are 1: 0.3～20 composite nano molecule deposition film compound oil displacement agents that obtain by mass ratio, and oil water interfacial tension has all reached ultra low interfacial tension, and recovery ratio is all high than water drive.
Embodiment 11
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 5.71g
Cetyl trimethylammonium bromide 8.57g
Tween-80 85.72g
The mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 15: 1.5 in the present embodiment.
Its preparation method is: according to the quality proportioning of above-mentioned raw materials, nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide are mixed, be prepared into the nano molecule deposition film compound oil displacement agent.
Embodiment 12
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 5.26g
Cetyl trimethylammonium bromide 15.79g
Tween-80 78.95g
The mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 15: 3 in the present embodiment.
Its preparation method is identical with embodiment 11.
Embodiment 13
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 8g
Cetyl trimethylammonium bromide 12g
Tween-80 80g
The mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 10: 1.5 in the present embodiment.
Its preparation method is identical with embodiment 11.
Embodiment 14
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 5.88g
Cetyl trimethylammonium bromide 5.88g
Tween-80 88.24g
The mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 15: 1 in the present embodiment.
Its preparation method is identical with embodiment 11.
Embodiment 15
100g is an example with preparation nano molecule deposition film compound oil displacement agent, and it is made up of following quality proportion raw material:
Nano molecule deposition film agent 8.33g
Cetyl trimethylammonium bromide 8.33g
Tween-80 83.34g
The mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 10: 1 in the present embodiment.
Its preparation method is identical with embodiment 11.
Regulate pH value to 9～11 of water with yellow soda ash; It is 0.08% the compound oil displacement agent aqueous solution that the nano molecule deposition film compound oil displacement agent of embodiment 11～15 preparation is mixed with massfraction; Adopt the HARK-SP rotation to drip the ultra low interfacial tension appearance and measure oil water interfacial tension; Probe temperature is 40 ℃; Testing used profit is deckle oil recovery factory deeply treating wastewater and dewatered oil; Estimate its oil displacement efficiency with natural core through model test of the reservoir sweep; Test oil is a deckle oil recovery factory dewatered oil, and test result is seen table 2.
Table 2 embodiment 11～15 compound oil displacement agent oil displacement efficiency test-results
| Embodiment 11 | Embodiment 12 | Embodiment 13 | Embodiment 14 | Embodiment 15 | |
| Recovery ratio is than water drive raising value | 40.25％ | 38.5％ | 34.5％ | 33.8％ | 34％ |
Because the nano molecule deposition film compound oil displacement agent of embodiment 11～15 preparations is when measuring oil water interfacial tension; Left and right sides oil droplet just elongates in 1 second, reaches ultralow value rapidly, can't be in the concrete data of Instrument measuring; Illustrate that its interfacial tension is all very low, has reached ultra low interfacial tension.Visible by table 2, the recovery ratio of the nano molecule deposition film compound oil displacement agent of embodiment 11～15 preparations all improves more than 30% than water drive, and the displacement of reservoir oil is fast.
Contrast table 1 is visible with the data in the table 2, and the nano molecule deposition film compound oil displacement agent of nano molecule deposition film agent of the present invention and tween-80, cetyl trimethylammonium bromide ternary built is better than the nano molecule deposition film compound oil displacement agent oil displacement efficiency of nano molecule deposition film agent and tween-80 binary built.
Claims (7)
1. nano molecule deposition film compound oil displacement agent, it is characterized in that: this compound oil displacement agent comprises nano molecule deposition film agent, tween-80, the mass ratio of nano molecule deposition film agent and tween-80 is 1: 0.3～20.
2. nano molecule deposition film compound oil displacement agent according to claim 1 is characterized in that: the mass ratio of described nano molecule deposition film agent and tween-80 is 1: 5～20.
3. nano molecule deposition film compound oil displacement agent according to claim 1 is characterized in that: the mass ratio of described nano molecule deposition film agent and tween-80 is 1: 10～15.
4. nano molecule deposition film compound oil displacement agent according to claim 1 is characterized in that: the mass ratio of described nano molecule deposition film agent and tween-80 is 1: 15.
5. nano molecule deposition film compound oil displacement agent according to claim 1; It is characterized in that: this compound oil displacement agent also comprises cetyl trimethylammonium bromide, and the mass ratio of nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 10～15: 1～3.
6. nano molecule deposition film compound oil displacement agent according to claim 5 is characterized in that: the mass ratio of described nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 10～15: 1.5.
7. nano molecule deposition film compound oil displacement agent according to claim 5 is characterized in that: the mass ratio of described nano molecule deposition film agent and tween-80, cetyl trimethylammonium bromide is 1: 15: 1.5.
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| CN 201110199185 CN102344791B (en) | 2011-07-15 | 2011-07-15 | Nano-molecular deposited film composite oil displacement agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789163A (en) * | 2021-11-02 | 2021-12-14 | 山东滨州昱诚化工科技有限公司 | Salt-tolerant nano-film oil displacement agent for oil field |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270279A (en) * | 2008-05-07 | 2008-09-24 | 山东大学 | Oil displacement system for improving recovery factor after polyalcohol drive and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270279A (en) * | 2008-05-07 | 2008-09-24 | 山东大学 | Oil displacement system for improving recovery factor after polyalcohol drive and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 《油田化学》 20001225 刘卫东等 化学驱油体系的油/水界面粘度 第337-339页 1-7 第17卷, 第4期 * |
| 《油田化学》 20030325 高芒来等 MD-1膜驱剂溶液的界面特性研究 第74-77页 1-7 第20卷, 第1期 * |
| 《精细化工》 20061231 杨莉等 MD膜驱剂与阳离子表面活性剂混合体系的胶束性质 第1233-1237页 1-7 第23卷, 第12期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789163A (en) * | 2021-11-02 | 2021-12-14 | 山东滨州昱诚化工科技有限公司 | Salt-tolerant nano-film oil displacement agent for oil field |
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