High-temperature oil displacement agent as well as preparation method and application thereof

The invention provides a high-temperature oil-displacing agent as well as a preparation method and application thereof, and belongs to the technical field of oil exploitation. The high-temperature oil displacement agent provided by the invention comprises the following components in percentage by mass: 20-30% of a cationic surfactant, 30-40% of an anionic/nonionic surfactant, 10-20% of low-carbon alcohol and the balance of water. When the high-temperature oil-displacing agent provided by the invention is applied to the recovery of thickened oil with the formation temperature of 70 DEG C and the crude oil viscosity of 1562 mPa.s, the oil displacement rate is greater than or equal to 91.2% and the oil displacement efficiency is greater than or equal to 12.4% after the high-temperature oil-displacing agent is subjected to temperature-resistant treatment at 350 DEG C for 12 hours, and the high-temperature oil-displacing agent is simple in preparation process, low in cost and environment-friendly. 本发明提供了一种高温驱油剂及其制