In response to the problem of low oil well production caused by the deposition of asphaltene in the wellbore and near wellbore areas,as well as emulsification and blockage of heavy oil during heavy oil extraction.Five different PO/EO ratios of bisphenol A phenolamine diblock polyethers are synthesized,and the best demulsifier DE-02 is selected.By compounding the demulsifier DE-02 with the selected solvent TC-03,a multifunctional heavy oil demulsifier is obtained.Indoor evaluation and on-site experiments are conducted on the system,and the research results show that the multifunctional heavy oil demulsifying plug removal agent has a dissolution rate of 5.7 mg/(mL·min)for asphaltene and 5.5 mg/(mL·min)for paraffin.The demulsification rate can reach 80%at 30 min.After using this reagent in a viscous oil well in Bohai Sea,the oil production of the well increases by 2 times compared to before the measures are taken,and good application results are achieved.
关键词
稠油/有机堵塞/乳化堵塞/破乳/溶解有机质
Key words
heavy oil/organic blockage/emulsification blockage/demulsification/dissolved organic matter
维普
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