Abstract
The viscosity of original heavy oil increases with the decrease of temperature in the process of wellbore lifting, which makes it more difficult to lift the wellbore for Tahe 10 area reservoir, so emulsification and viscosity reduction technology is studied. The carboxymethyl polyoxyethylene alkyl alcohol ether surfactant containing different oxyethylene chains is an emulsifier with excellent tolerance of high temperature and salt. The researches indicate the compounded system of OPC-20 and DSB at 4:6 can significantly improve the solubility of OPC-20 in high-temperature brine, and it also has a good emulsification performance for Tahe heavy oil.
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