中文摘要：

跃进二号油田由于其储层物性好、原油物性差，导致出砂、结蜡现象较严重。由此造成的油井频繁作业，对油层产生了较大污染。该油田主要存在层间干扰污染、原油内在污染及外在人为污染3种类型的油层污染。该油田钻井、正常生产及措施作业过程都容易对油层造成无机和有机污染。在开发过程的每个环节，根据储层污染状况，选取与储层配伍的射孔液、酸化液、黏土防膨液等保护油层，避免再次污染；针对储层污染的采油井应用复射孔解堵的物理解堵方法和微乳酸解堵的化学解堵方法进行解堵，取得了较好的效果。

英文摘要：

Better reservoir property and poor oil property of Yuejin No. 20ilfield lead to serious sand production and paraffin precipitation. Thus, frequent producer operation causes much contamination for reservoir. There are three types of reservoir contamination in this oilfield including interlayer interference contamination, oil inherent contamination and external factor contamination. The process of drilling, normal production and stimulation opera- tion may easily cause organic and inorganic contamination for reservoir. Based on contamination types of reservoir, adaptive broken down method is adopted and much effect are achieved.