Oil-soluble carbon quantum dots, nanofluid composition containing oil-soluble carbon quantum dots and method for inhibiting carbon dioxide flooding asphaltene deposition
A technology of carbon quantum dots and nanofluids, applied in the direction of drilling compositions, nanocarbons, chemical instruments and methods, etc., can solve the problems of rare inhibition and dispersion, achieve enhanced oil recovery and reduce reservoir damage , the effect of inhibiting aggregation
Pending Publication Date: 2022-07-15
CHINA UNIV OF PETROLEUM (BEIJING)
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Abstract
The invention provides an oil-soluble carbon quantum dot, a nanofluid composition containing the oil-soluble carbon quantum dot and a method for inhibiting carbon dioxide flooding asphaltene deposition. The preparation method of the oil-soluble carbon quantum dot provided by the invention comprises the step of performing microwave radiation on a mixed solution of a nonionic surfactant and phosphoric acid to obtain the oil-soluble carbon quantum dot. The carbon quantum dot nanofluid composition provided by the invention contains the oil-soluble carbon quantum dot. The method for inhibiting asphaltene deposition in the carbon dioxide flooding process by adopting the carbon quantum dot nanofluid composition comprises the following step: injecting the carbon quantum dot nanofluid composition into a carbon dioxide flooding oil reservoir. The oil-soluble carbon quantum dots and the carbon quantum dot nanofluid composition provided by the invention can effectively inhibit asphaltene deposition in a carbon dioxide flooding process, reduce reservoir damage and improve the crude oil recovery rate.
Application Domain
Material nanotechnologyNanooptics +4
Technology Topic
NanofluidCarbon dioxide flooding +13
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PUM
Property | Measurement | Unit |
Size | 0.5 ~ 4.0 | nm |
The average particle size | 2.3 | nm |
Particle size | 400.0 ~ 3000.0 | nm |
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