Foam oil-displacing agent suitable for high-salinity low-permeability oil reservoir, preparation method and application thereof
The invention provides a foam oil-displacing agent suitable for high-salinity low-permeability oil reservoir. The foam oil-displacing agent is prepared from the following components in percentage by weight: 0.4-0.6% of tris [(N-dodecyl-N-ethyl-N-sodium carboxymethyl)-2-ammonium bromide ethylene] ami...
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Main Authors | , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
18.02.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides a foam oil-displacing agent suitable for high-salinity low-permeability oil reservoir. The foam oil-displacing agent is prepared from the following components in percentage by weight: 0.4-0.6% of tris [(N-dodecyl-N-ethyl-N-sodium carboxymethyl)-2-ammonium bromide ethylene] amine, 0.1-0.35% of dodecyl dimethyl amine oxide, 0.02-0.07% of sodium salicylate, 0.04-0.14% of a chelating agent, 6-10% of inorganic salt and the balance of water. The invention also provides a preparation method and application of the self-assembled carbon dioxide foam oil-displacing agent with ultralow interfacial tension. According to the invention, the self-assembled carbon dioxide foam oil-displacing agent is good in salt resistance, acid resistance and alkali resistance, foaming liquid has high viscosity, the strength and stability of a foam interfacial film are improved, the oil-water interfacial tension reaches 10<-3 > mN/m order of magnitude and below, foam generated by experiments is fine and rich, the inj |
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Bibliography: | Application Number: CN202111476384 |