强天然水驱油藏开发机理实验研究

Mechanism of strong natural aquifer reservoir development

 张振涛¹ 姜汉桥¹ 李俊键¹ 雷占祥² 肖康² 刘洪霞¹

中国石油大学（北京）石油工程学院，北京 102249 中国石油勘探开发研究院，北京 100083）

 针对已有的水驱相似准则体系，引入敏感因子，利用数值模拟方法研究各相似参数的敏感性，确定相似参数的主要敏感因子介于10-1~101。结合油藏实际情况，设计了满足几何相似、运动相似和动力相似的重力占优和黏滞力占优物理模型及水驱油模拟实验，研究了不同驱动力占优条件下的油藏水驱开发特征及剩余油分布特征，为挖潜方向提供指导。模拟实验结果表明：黏滞力占优模型前期含水上升速度快，含水率曲线呈“厂”字形，指进现象较严重，但总体上波及程度较高，采出程度较高；重力占优模型前期含水上升较慢，注水后含水快速上升，顶部富集剩余油，后期开发潜力较大。

 In this paper, we studied the similarity criterion of water flooding by sensitivity factor. Using numerical simulation to investigate the sensitivity of each dimensionless parameter, it shows that the sensitivity factor is within 0.1-1.0. Based on geometric similarity, movement similarity and dynamic similarity, the gravity-dominant and viscous force-dominant physical models and water flooding simulation experiment were designed. Development features and remaining oil distribution under different driving forces were investigated for potential production. The simulation results indicate that the water cut rises fast and fingers seriously by the viscous force-dominant physical model, but it has large swept volume and high reserves recovery. The water cut of the gravity-dominant physical model rises slowly at first, but rises fast after water injection, which has a great potential for developing in the rich remaining oil distribution regions.

10.6056/dkyqt201605018