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针对胜坨油田高温高盐、非均质严重等特点,研究了AP-P5:B-PPG的质量浓度比为4:1的强化聚合物体系,在沙二8单元选取四个试注井组开展试注试验。结果表明,注入强化聚合物体系后,注入压力上升了2.7MPa,启动压力上升,吸水指数下降,渗流阻力增大,吸水剖面也得到了一定的改善。说明设计的强化聚合物驱油体系在高温高盐III类油藏的应用是有效的,这对先导区全面实施强化聚合物驱以及形成高温高盐Ⅲ类化学驱配套技术具有重要意义。
According to the characteristics of high temperature and high salt in Shengtuo Oilfield and serious heterogeneity, the enhanced polymer system with mass concentration ratio of AP-P5: B-PPG of 4: 1 was studied. Four well test injection wells Carry out test injection test. The results show that the injection pressure increases by 2.7MPa after injection of the polymer system. The starting pressure increases, the water absorption index decreases, the seepage resistance increases, and the water absorption profile has also been improved. It shows that the designed polymer flooding system is effective in the application of high temperature and high salt III reservoirs, which is of great significance to the full implementation of enhanced polymer flooding and the formation of high temperature and high salt Ⅲ chemical flooding technology in the pilot area.