CN111303399A - Preparation method of demulsifier suitable for ternary combination flooding crude oil - Google Patents
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- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
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- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
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Abstract
A preparation method of a demulsifier suitable for ternary combination flooding crude oil. The method comprises the following steps: putting a certain amount of perfluorobutanamide and a catalyst potassium hydroxide into a high-pressure reaction kettle, sealing, purging and replacing air in the reaction kettle by using nitrogen, pumping the reaction kettle to vacuum by using a vacuum pump, heating to 135-145 ℃, introducing ethylene oxide into the reaction kettle, and performing polymerization reaction to generate an intermediate product A; and putting the intermediate product A into a three-component bottle, heating the intermediate product A to 60-80 ℃ in an oil bath, adding a catalyst potassium hydroxide, heating the oil bath to 80-100 ℃, slowly dropwise adding benzyl chloride for 2-3 h, heating the oil bath to 110 ℃ after dropwise adding, and carrying out heat preservation reaction for 8h to obtain the demulsifier suitable for the ternary combination flooding crude oil.
Description
The technical field is as follows:
the invention relates to a preparation method of an oilfield chemical, in particular to a preparation method of a demulsifier suitable for ASP flooding crude oil.
Background art:
in recent years, oil fields have entered the later period of high water content, and the ASP flooding oil recovery technology is adopted in many oil fields. Although the ternary combination flooding oil extraction technology can improve the recovery ratio, the emulsification problem of the produced liquid is very serious due to the synergistic effect and the emulsification effect in the oil displacement process, so that most of crude oil is produced in the form of emulsion, and the oil-water separation is difficult, which brings great obstacles to the production, transportation, processing, storage and the like of the crude oil. Therefore, special demulsifiers for chemical demulsification and dehydration of the ASP flooding produced fluid need to be researched.
A large number of researches show that due to the unique property of fluorine atoms, the fluorine-containing surfactant has the characteristics of high surface activity, high thermal stability, high chemical stability, hydrophobicity and oil repellency due to the introduction of a fluorocarbon chain in the molecular structure, can reduce the oil-water interfacial tension to a certain extent, and is suitable for being used as a demulsifier. The fluorine-containing surfactant has good environmental compatibility, although the simple substance fluorine and the ionic fluoride have strong toxicity, the fluorine-containing surfactant has low toxicity and small environmental pollution, so the fluorine-containing surfactant has high research value when being applied to the demulsifier in the petroleum industry. The key point of demulsification is to change the property of an oil-water interface and reduce the interfacial tension and the strength of a membrane. Due to the unique property of the fluorine-containing surfactant, the oil-water interfacial tension can be remarkably reduced, so that the fluorine-containing surfactant has more excellent demulsification effect than other surfactants. With the development of the ternary complex oil displacement technology, the application of the fluorine-containing surfactant to the demulsifier of the ternary complex flooding produced fluid can play an important role.
The invention content is as follows:
in order to solve the technical problems mentioned in the background technology, the invention provides a preparation method of a demulsifier suitable for ASP flooding crude oil. The novel demulsifier is a perfluorinated surfactant, and because the perfluorinated surfactant has high interfacial activity, the novel demulsifier can accelerate oil discharge of a membrane and improve the speed of coalescence of water droplets. The demulsifier belongs to a multi-branch chain structure molecule, is easy to form a micro network, and paraffin wax microcrystals can be stored in the micro network so as to prevent the paraffin wax microcrystals from forming a net structure and keep the freezing point and viscosity of the oil phase stable. The modifier suitable for the ternary combination flooding crude oil demulsifier is benzyl chloride, and the benzyl chloride has a bactericidal effect, can improve the quality of produced crude oil, has a good demulsification effect, and is particularly suitable for demulsification and dehydration of ternary combination flooding produced fluid.
The technical scheme of the invention is as follows: the preparation method of the demulsifier suitable for the ASP flooding crude oil comprises the following steps:
wherein:
the preparation method comprises the following steps:
firstly, putting a certain amount of perfluorobutanamide and catalyst potassium hydroxide into a high-pressure reaction kettle, sealing, wherein the amount of potassium hydroxide is 0.2-0.4% of the total mass of perfluorobutanamide, replacing air in the kettle by using a nitrogen purging mode, vacuumizing to the gauge pressure of-0.086 MPa by using a vacuum pump, heating the high-pressure reaction kettle to 140 ℃, opening a feed valve, slowly adding ethylene oxide, introducing the ethylene oxide and the perfluorobutanamide with the mass ratio of 1.7: 1-5.0: 1, controlling the pressure of the reaction kettle to be 0.19-0.21 MPa, and closing the feed valve after the ethylene oxide is added; after the reactants are fully reacted and the pressure in the reaction kettle returns, continuously reacting in the reaction kettle until the pressure in the reaction kettle is reduced to the gauge pressure of-0.086 MPa, and finishing the reaction to obtain an intermediate product A;
and secondly, taking a certain amount of M from the intermediate product A obtained in the first step, adding the M into a trisection bottle, continuously stirring, carrying out oil bath heating to 60-80 ℃, adding potassium hydroxide serving as a catalyst into the trisection bottle, wherein the dosage of the catalyst potassium hydroxide is 0.11-0.13% of the mass of the intermediate product A of the certain amount of M, stirring by using a stirrer, heating the oil bath to 80-100 ℃, slowly dropwise adding benzyl chloride serving as a modifier into the trisection bottle by using a separating funnel, wherein the dosage of the benzyl chloride is 0.2-0.24% of the mass of the intermediate product A of the certain amount of M, and the dropwise adding time is 2-3 h, after dropwise adding, heating the oil bath to 110 ℃ for heat preservation, and fully reacting for 8h to obtain the demulsifier suitable for the ternary complex flooding crude.
The invention has the following beneficial effects:
the demulsifier prepared by the preparation method has strong demulsification effect, can weaken an interface film which has a stabilizing effect between oil and water, reduce the inhibition effect of the interface film on coalescence, accelerate oil discharge of the film, improve the speed of coalescence of water droplets and accelerate oil-water separation. The modifier is benzyl chloride, which has bactericidal effect and can improve the quality of the produced crude oil.
Description of the drawings:
FIG. 1 is a diagram showing the demulsification effect of a sample 1 of the present invention on ASP flooding produced fluid of a certain oil field within 30min, 1h, 2h, 4h, 6h, 8h and 10 h.
FIG. 2 is a diagram showing the demulsification effect of sample 2 of the present invention on ASP flooding produced fluid of a certain oil field within 30min, 1h, 2h, 4h, 6h, 8h and 10 h.
FIG. 3 is a diagram showing the demulsification effect of sample 3 of the present invention on ASP flooding produced fluid of a certain oil field within 30min, 1h, 2h, 4h, 6h, 8h and 10 h.
FIG. 4 is a diagram showing the demulsification effect of a certain demulsifier (not of the invention) on a certain oilfield ASP flooding produced fluid within 30min, 1h, 2h, 4h, 6h, 8h and 10h respectively.
The specific implementation mode is as follows:
the invention relates to a preparation method of a demulsifier suitable for ASP flooding crude oil, wherein the demulsifier has the following structural general formula:
wherein:
the preparation method comprises the following steps:
firstly, putting a certain amount of perfluorobutanamide and catalyst potassium hydroxide into a high-pressure reaction kettle, sealing, wherein the amount of potassium hydroxide is 0.2-0.4% of the total mass of perfluorobutanamide, replacing air in the kettle by using a nitrogen purging mode, vacuumizing to the gauge pressure of-0.086 MPa by using a vacuum pump, heating the high-pressure reaction kettle to 140 ℃, opening a feed valve, slowly adding ethylene oxide, introducing the ethylene oxide and the perfluorobutanamide with the mass ratio of 1.7: 1-5.0: 1, controlling the pressure of the reaction kettle to be 0.19-0.21 MPa, and closing the feed valve after the ethylene oxide is added; after the reactants are fully reacted and the pressure in the reaction kettle returns, continuously reacting in the reaction kettle until the pressure in the reaction kettle is reduced to the gauge pressure of-0.086 MPa, and finishing the reaction to obtain an intermediate product A;
and secondly, taking a certain amount of M from the intermediate product A obtained in the first step, adding the M into a trisection bottle, continuously stirring, carrying out oil bath heating to 60-80 ℃, adding potassium hydroxide serving as a catalyst into the trisection bottle, wherein the dosage of the catalyst potassium hydroxide is 0.11-0.13% of the mass of the intermediate product A of the certain amount of M, stirring by using a stirrer, heating the oil bath to 80-100 ℃, slowly dropwise adding benzyl chloride serving as a modifier into the trisection bottle by using a separating funnel, wherein the dosage of the benzyl chloride is 0.2-0.24% of the mass of the intermediate product A of the certain amount of M, and the dropwise adding time is 2-3 h, after dropwise adding, heating the oil bath to 110 ℃ for heat preservation, and fully reacting for 8h to obtain the demulsifier suitable for the ternary complex flooding crude.
The above are the basic steps of the preparation method of the present invention. The following are preferred embodiments of the present invention:
in the first step, the catalyst of the reaction is potassium hydroxide, and the using amount of the potassium hydroxide is 0.3 percent of the mass of the perfluorobutanamide;
in the first step, the mass ratio of the ethylene oxide to the perfluorobutanamide is 1.7: 1-5.0: 1.
In the first step, the reaction temperature in the high-pressure reaction kettle is 140 ℃, and the reading of a pressure meter of the reaction kettle is between 0.2 +/-0.01 MPa;
in the second step, the temperature of the first oil bath is 70 ℃, and the potassium hydroxide is added and then stirred for 15-25 min; the temperature of the second oil bath is 90 ℃, and the modifier is dripped; the third oil bath temperature is 110 ℃, and the heat preservation time is 8 h;
in the second step, the catalyst of the reaction is potassium hydroxide, and the using amount of the potassium hydroxide is 0.12 percent of the mass of the intermediate product A of the quantitative M;
in the second step, the modifier is benzyl chloride, the dosage of the benzyl chloride is 0.2 percent of the mass of the intermediate product A of the quantitative M, and the dripping time is 2.5 hours.
The chemical reaction equation related to the preparation method is as follows:
the following provides specific embodiments with reference to the attached drawings, the application scope of the present invention is not affected by the embodiments, and the specific implementation manner can be determined according to the technical scheme and the application specific situation of the present invention.
Example 1
Firstly, 100g of perfluorobutanamide and 0.3g of potassium hydroxide are put into a high-pressure reaction kettle to be sealed, air in the kettle is replaced by a nitrogen purging mode, the high-pressure reaction kettle is vacuumized by a vacuum pump to gauge pressure of-0.086 MPa, the high-pressure reaction kettle is heated to 140 ℃, a feed valve is opened, 170g of ethylene oxide is slowly added, the pressure of the reaction kettle is controlled to be 0.19 MPa-0.21 MPa, and the feed valve is closed after the ethylene oxide is added; after the reactants are fully reacted, the reaction is finished until the gauge pressure in the reaction kettle is reduced to-0.086 MPa, and an intermediate product A is obtained;
and step two, adding 180g of the intermediate product A obtained in the step one into a trisection bottle, continuously stirring, heating to 70 ℃ by using an oil bath, adding 0.2g of potassium hydroxide into the trisection bottle, continuously heating to 90 ℃ by using the oil bath, slowly dropwise adding 0.36g of benzyl chloride into the trisection bottle by using a separating funnel, wherein the dropwise adding time is 2.5 hours, after the dropwise adding is finished, heating to 110 ℃ by using the oil bath, and fully reacting for 8 hours to obtain the demulsifier sample 1 suitable for the ternary combination flooding crude oil.
The same procedure as described in example 1 was repeated by changing the mass ratio of ethylene oxide introduced to perfluorobutanamide to 3.3: 1. 5.0: 1; different demulsifiers 2 and 3 suitable for the ASP flooding crude oil can be obtained.
Example 2 evaluation of dehydration Effect for demulsifier for ASP flooding crude oil
Referring to a standard SY/T5281-. The results of the experiment are shown in the following table:
as can be seen from the table, the mass ratio of perfluorobutanamide to ethylene oxide is 1: the sample 2 of 3.3 has the fastest demulsification speed and the best demulsification effect.
Claims (2)
1. The preparation method of the demulsifier suitable for the ASP flooding crude oil comprises the following steps:
wherein:
the preparation method comprises the following steps:
firstly, putting a certain amount of perfluorobutanamide and catalyst potassium hydroxide into a high-pressure reaction kettle, sealing, wherein the amount of potassium hydroxide is 0.2-0.4% of the total mass of perfluorobutanamide, replacing air in the kettle by using a nitrogen purging mode, vacuumizing to the gauge pressure of-0.086 MPa by using a vacuum pump, heating the high-pressure reaction kettle to 140 ℃, opening a feed valve, slowly adding ethylene oxide, introducing the ethylene oxide and the perfluorobutanamide with the mass ratio of 1.7: 1-5.0: 1, controlling the pressure of the reaction kettle to be 0.19-0.21 MPa, and closing the feed valve after the ethylene oxide is added; after the reactants are fully reacted and the pressure in the reaction kettle returns, continuously reacting in the reaction kettle until the pressure in the reaction kettle is reduced to the gauge pressure of-0.086 MPa, and finishing the reaction to obtain an intermediate product A;
and secondly, taking a certain amount of M from the intermediate product A obtained in the first step, adding the M into a trisection bottle, continuously stirring, carrying out oil bath heating to 60-80 ℃, adding potassium hydroxide serving as a catalyst into the trisection bottle, wherein the dosage of the catalyst potassium hydroxide is 0.11-0.13% of the mass of the intermediate product A of the certain amount of M, stirring by using a stirrer, heating the oil bath to 80-100 ℃, slowly dropwise adding benzyl chloride serving as a modifier into the trisection bottle by using a separating funnel, wherein the dosage of the benzyl chloride is 0.2-0.24% of the mass of the intermediate product A of the certain amount of M, and the dropwise adding time is 2-3 h, after dropwise adding, heating the oil bath to 110 ℃ for heat preservation, and fully reacting for 8h to obtain the demulsifier suitable for the ternary complex flooding crude.
2. The preparation method of the demulsifier suitable for ASP flooding crude oil according to claim 1, wherein the demulsifier comprises the following steps:
in the first step, the catalyst of the reaction is potassium hydroxide, and the using amount of the potassium hydroxide is 0.3 percent of the mass of the perfluorobutanamide;
in the first step, the mass ratio of the ethylene oxide to the perfluorobutanamide is 1.7: 1-5.0: 1;
in the first step, the reaction temperature in the high-pressure reaction kettle is 140 ℃, and the reading of a pressure meter of the reaction kettle is between 0.2 +/-0.01 MPa;
in the second step, the temperature of the first oil bath is 70 ℃, and the potassium hydroxide is added and then stirred for 15-25 min; the temperature of the second oil bath is 90 ℃, and the modifier is dripped; the third oil bath temperature is 110 ℃, and the heat preservation time is 8 h;
in the second step, the catalyst of the reaction is potassium hydroxide, and the using amount of the potassium hydroxide is 0.12 percent of the mass of the intermediate product A of the quantitative M;
in the second step, the modifier is benzyl chloride, the dosage of the benzyl chloride is 0.2 percent of the mass of the intermediate product A of the quantitative M, and the dripping time is 2.5 hours.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111777757A (en) * | 2020-07-27 | 2020-10-16 | 滨州学院 | Preparation method of super heavy oil demulsifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657514A (en) * | 2012-09-18 | 2014-03-26 | 湖北中科博策新材料研究院 | Preparation method of fluorine-containing non-ionic surface active agent and application |
| CN105817177A (en) * | 2015-01-28 | 2016-08-03 | 东莞东阳光科研发有限公司 | Fluorine-containing polyoxyethylene ether non-ionic surface active agent and preparation method thereof |
| US20180334417A1 (en) * | 2017-05-19 | 2018-11-22 | Etna-Tec, Ltd. | Methods for Making Functionalized Fluorinated Monomers, Fluorinated Monomers, and Compositions for Making the Same |
| CN110467942A (en) * | 2019-07-30 | 2019-11-19 | 滨州学院 | A kind of preparation method of demulsifier for oil fields |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657514A (en) * | 2012-09-18 | 2014-03-26 | 湖北中科博策新材料研究院 | Preparation method of fluorine-containing non-ionic surface active agent and application |
| CN105817177A (en) * | 2015-01-28 | 2016-08-03 | 东莞东阳光科研发有限公司 | Fluorine-containing polyoxyethylene ether non-ionic surface active agent and preparation method thereof |
| US20180334417A1 (en) * | 2017-05-19 | 2018-11-22 | Etna-Tec, Ltd. | Methods for Making Functionalized Fluorinated Monomers, Fluorinated Monomers, and Compositions for Making the Same |
| CN110467942A (en) * | 2019-07-30 | 2019-11-19 | 滨州学院 | A kind of preparation method of demulsifier for oil fields |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777757A (en) * | 2020-07-27 | 2020-10-16 | 滨州学院 | Preparation method of super heavy oil demulsifier |
| CN111777757B (en) * | 2020-07-27 | 2022-10-04 | 滨州学院 | Preparation method of super heavy oil demulsifier |
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Effective date of registration: 20230731 Address after: 163000 Emerging Industry Incubator (Park) 4 # A716-718, No. 40 Huohuxin Street, High tech Zone, Daqing City, Heilongjiang Province Patentee after: Daqing high tech Zone oripharm Co.,Ltd. Address before: No. 199, development road, high tech Zone, Daqing City, Heilongjiang Province, 163318 Patentee before: NORTHEAST PETROLEUM University |