Preparation of Novel Paraffin Inhibitor and Its Application in Offshore Oilfields
A novel paraffin inhibitor was synthesized by free radical solution copolymerization with monomers of allyl polyethylene glycol(XPEG-700),acrylic acid(AA),maleic anhydride(MAH)and sodium allyl sulfonate(SAS).The effect of addition of monomers and initiator on the performance of paraffin inhibitor was studied,and the optimum synthetic formula of paraffin inhibitor was determined.The result indicated that when m(XPEG-700)∶m(AA)∶m(MAH)∶m(SAS)=7.0∶15.0∶6.0∶6.0,initiator amount was 0.8%of monomer weight,the paraffin prevention rate of prepared paraffin inhibitor was over 95%.Application in oilfield showed a satisfying performance,the pipeline transportation efficiency was greatly improved when the dosage of paraffin inhibitor was 80 mg·L-1.
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