应用核磁共振成像（NMRI）技术研究复合剂驱油特征

Visualization of Combination Corefloods and Oil driving with Aid of NMR Imaging

摘要: 本文应用核磁共振成像技术,在均值、非均值模型中研究了复合剂驱油动态实验过程。观察及分析了复合剂驱油特征和效果,对复合剂驱油段塞前缘进行了实时跟踪,得到了复合剂驱油段塞前缘油墙的形成及剩余油分布与运移的二维图像,给出了复合剂驱油后,剩余油的饱和度分布曲线。实验表明:在层状非均值地层中,若渗透率差异大,复合剂段塞主要进入高渗层,而波及不到低渗层,即复合剂波及效率低。若渗透率差异小,复合剂段塞大部分进入高渗层,有少部分进入低渗层,即复合剂波及效率较高。

Abstract: The combination flooding (polymer+alkali+surfactant and oil driving) is being used in Shengli Oilfield, east of China.Support by Shengli Oil Company, core-floods in different heterogeneous core and homogenous core have been visualized using NMR imaging.The formation and movement of oil bank produced by combine agent are present.NMR imaging show that the sweep efficiency is lower when the permeability ratio is higher.