Oil field and preparation method of Crude Oil

The present invention belongs to the technical field of oil and gas gathering water, crude oil pour point depressant discloses a method for its preparation, first acrylate or methacrylate is mixed with perfluoro-carboxylate, an organic solvent is added, heating and stirring; then styrene was added, heated under nitrogen, was added dropwise an organic solvent solution of the initiator, the reaction product was obtained after a; final а- poly olefin, mixed with the product polymer B a stirred uniformly available. Crude oil pour point depressant of the present invention has not only wax pour function, and no chlorine, is very suitable for offshore transport crude oil, and having a dosing amount is small, a large amplitude pour characteristics, a simple process for their preparation, the fluorine-containing polar group is introduced by direct molecular chain-step reaction, the reaction easy to control and safe, reliable, environmentally friendly, there is a strong general applicability.