Journal
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
Volume 42, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colcom.2021.100426
Keywords
Water soluble copolymer; Heavy oil; Viscosity reduction; Cyclic performance; Weak interaction
Funding
- Major Research of Science and Technology, China [2016ZX05058003012]
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A copolymer with strong hydrophilicity and low surface activity was synthesized to interact with heavy oil, effectively reducing its viscosity by over 90%. The copolymer was able to form oil-in-water emulsions under stirring and can be reused multiple times for viscosity reduction, providing a convenient and cost-effective technique for oil extraction.
We synthesized a copolymer with strong hydrophilicity and low surface and interfacial activity, which reduced the viscosity of heavy oil by interacting with asphaltenes or resins via hydrogen bonding. Water-soluble terpolymers (PAMD) were synthesized by the copolymerization of acryloyl morpholine, maleic anhydride with N, N-dimethylacrylamide in pure water. The copolymer showed low surface and interfacial activity, as well as the ability to weakly interact with heavy oil to form oil-in-water emulsions under stirring, but reducing the viscosity of the heavy oil by more than 90%. Under the condition of weak interaction between polymer and heavy oil, the oil-in-water emulsions dehydrated within 1 h to form oil and aqueous phases, which could be reused for the viscosity reduction at least five times. Therefore, this novel heavy oil viscosity reducer to provide a convenient and effective technique for oil extraction and reduce the burden of economic costs.
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