关键词: 聚合物驱, 抽油机井, 参数优化, 防偏磨, 检泵周期

Abstract: In the process of polymer flooding，frequent injection and production adjustments have led to fluctuations in pay zone fluid supply and flowing pressure，and so it is necessary to adjust the pumping parameters in time acording to the working conditions of rod-pumped wells. Moreover，polymer is corrosive to rod-tubing string. The synergistic effect of corrosion and eccentric wear has led to seriously broken or disconnected of strings and shortened pump inspection period，preventive measures need to be taken. Since the start of polymer flooding in Block Qidong-1 of Xinjiang Oilfield，the downhole parameters of rod-pumped wells have been optimized by applying the self-developed calculating and analyzing computer system. A series of technologies to prevent tubing and rod corrosion and eccentric wear has been formed by independently developing anti-wear coupling，forced rotation centralizer and sucker rod connector，introducing lined tubing and providing bottom-weighted sucker rod according to wellbore trajectory. In addition，the rod-tubing string has been further improved and better protected with the development of anti-sticking，anti-leakage and anti-break oil well pump，anti-sand sticking gas separation device and new sucker rod connector. Through the application of string optimization technology，the average annual increase in oil production is 163241 t，and the average pump inspection period is extended from 235 days to 516 days，which ensures the normal and efficient production of rod-pumped wells under polymer flooding.

Key words: polymer flooding, rod-pumped well, parameter optimization, eccentric wear prevention, pump inspection period