随着聚合物驱大规模的推广,注聚井堵塞问题越发严重,聚合物溶液不能进入低渗层,层间矛盾加剧,造成驱油效率低下。常规的注聚井解堵技术有效期短,本文通过对注聚井堵塞原因分析入手,研制出由聚合物降解剂、复合酸组成的复合解堵技术,在渤海油田试验成功并得以推广应用。 With the large-scale popularization of polymer flooding, the problem of plugging in the injection well becomes more serious, the polymer solution can not enter the low permeability layer, and the contradiction between layers is aggravated, resulting in low oil displacement efficiency. Conventional injection well decontamination technology has a short effective period. Through the analysis of the reasons for the injection block clogging, this paper developed a composite decontamination technology consisting of polymer degrading agents and complex acids. The experiment was successful in Bohai Oilfield and was popularized and applied.