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1 前言孤岛油田已进入高含水开发阶段,为了进一步提高原油采收率。实现原油稳定产量的目标,油田广泛开展了以聚合物驱油为主的三次采油驱油工艺。采用聚合物驱油的最初几年,用于输送聚合物溶液的管线基本采用普通钢质管道,通过长时间的注聚生产运行实践,表明钢质管道不适于输送聚合物溶液。其原因有二:一是钢
1 Introduction Gudao has entered a high-water development stage, in order to further enhance the recovery rate of crude oil. Achieve the goal of a steady production of crude oil, the oil field to carry out a wide range of polymer displacement oil-based oil recovery process. In the early years of polymer flooding, the pipelines used to deliver polymer solutions were based on conventional steel pipelines and were run through a long period of injection co-production operation demonstrating that steel pipelines were not suitable for transporting polymer solutions. There are two reasons: First, steel