关键词: 陆上油田, 聚合物驱, 波及规律, 饱和度监测, 驱油效率

Abstract: In order to study the typical block of onshore oil fields, a twodimensional interlayer physical model is designed. The experiment scheme of hydrophobic associating polymer flooding after polymer flooding is monitored by self developed saturation monitoring system. The spread and use of typical onshore oil field blocks are grasped by carrying out the experiment about the displacement, the use and the monitor of the twodimensional interlayer physical model and monitoring and the oil saturation distribution in the chemical flooding stage in real time. The results indicated that: in twodimensional interlayer core parallel experiments, recovery efficiency of the land typical block could be improved by 13.69% through injecting 1.05 PV Huading I hydrophobic associating polymer after polymer flooding. Saturation monitoring data showed that chemical flooding stage after polymer flooding had formed oil wall inordinately, increased filtrational resistance, so as to enlarge the swept volume and improve recovery efficiency. The key to improve the oil recovery in polymer flooding was the efficient use of the low permeability layer. A wide low oil saturation line was formed in core mainstream channels with a strong oil displacement efficiency after Huading I hydrophobic associating polymer flooding.

Key words: Onshore oil fields, Polymer flooding, Sweep efficiency, Saturation monitoring, Oil displacement efficiency