胜利油田注聚区块深调防窜技术研究与应用

Research and Application of Deep Profile Modification and Channeling Prevention in Polymer Flooding Block

长期的注水冲刷使得地下油藏中高渗透条带或大孔道的分布更加普遍,导致注聚过程中很容易发生高浓度聚合物“窜流”现象,这不仅造成聚合物浪费,而且难以形成高质量的聚合物段塞。结合注聚前、注聚过程中、注聚后转后续水驱 3个不同注聚阶段所具有的开发特征有针对性的开展了堵剂的筛选研究和堵调工艺的优化研究,并对现场实施效果进行了总结分析,深调防窜是贯穿注聚全过程的一项有效封堵高渗透条带、保证注聚开发效果的必不可少的剖面调整措施。

The distribution of high permeable zone or large holes caused by long term water flooding is becoming widespread, which leads to channeling of high concentration polymer during polymer flooding This phenomenon not only results in waste of expensive polymer, but also makes it difficult to form polymer plug with high quality In this paper, the necessity of profile control and channeling prevention in polymer flooding area were discussed And it also deals with the screening of blocking agent and optimization of profile control technology in accordance with the distinct development characteristics of pre polymerflooding, polymer flooding and succeeding water flooding after polymer flooding And the application effect of the technology discussed above confirms that deep profile control and channeling prevention is an indispensable measure to plug high permeable zone and strive for ideal polymer flooding effect