孤岛油田中二中Ng3-5注聚扩大区后续水驱提高采收率技术研究

Enhanced Oil Recovery by Subsequent Water Flooding in Ng3-5 Expanding Area of Zhong'er Region of Gudao Oilfield

孤岛油田中二中扩大区作为Ⅱ类注聚油藏,其特有的开发井网方式、油藏类型和开发历史无章可循。在转入后续水驱的半年时间中,在认真分析影响聚合物驱向水驱平稳过渡因素的基础上,摸索出了一套适合中二中扩大区实现平稳过渡的注采调整技术,可以为孤岛油田其他二类注聚油藏的后续水驱调整提供借鉴。

Ng3-5 expanding area of Zhong'er Region of Gudao Oilfield was uncompacted sandstone reservoir with fluvial facies positive rhythm,which was a typical Ⅱ sedimentary reservoir.Appropriate methods and rules were proposed by analyzing the development situation of ⅡSedimentary reservoir,geologic characteristics and characteristics of reservoirs.It provides the incremental oil effect of enhancing the development level by turning into subsequent water flooding by regulating the injection situation of polymers.