聚驱后剩余油分布及挖潜技术研究

Remaining Oil Distribution and Techniques for Further Development After Polymer Flooding

油田经过聚驱开发后,油层动用程度得到了较大的改善,但聚驱后仍存在一部分剩余油。为了寻求后续水驱阶段剩余油切实可行的有效挖潜方法,利用室内实验和数值模拟结果,明确不同类型剩余油分布,对不同类型剩余油采取行之有效的挖潜措施,应用与之配套的工艺技术,形成一套注聚后葡一组剩余油挖潜配套技术。这些配套技术应用于现场实际中,取得了较好效果。这样使葡一组聚驱后剩余油成为可动用的开发潜力,探索出了一条聚驱后进一步提高采收率的新路子。

After polymer flooding, producing performance of oil layers is greatly improved, but there still exist some remaining oil after polymer flooding. In order to effectively develop remaining oil, distribution of different types of remaining oil is established according to laboratory tests and numerical simulation results. Effective development measures and matching technology should be applied to different types of remaining oil. Therefore, the matching techniques for further development of remaining oil in PuI Formation are formed. These matching techniques work well in practice. So, the remaining oil in PuI Formation after polymer flooding can be produced. This paper suggests a new method to further improve oil recovery after polymer flooding.