雁翎油田注氮气提高采收率工艺技术

ENHANCED OIL RECOVERY THROUGH NITROGEN INJECTION IN YANLING OIL FIELD

在现有的提高采收率方法中，注气驱是应用较广、效果较好的方法，特别是注氮气驱由于其气源广泛、价廉经济、无腐蚀性，以及要求的油藏地质结构特征和原油的物理性质等因素的变化范围广泛等特产，这种提高采收率的方法应用的最为普及，代表了目前提高采收率的发展方向。结合雁翎油田实例，简要介绍了注氮气提高采收率的机理、注气井组建设、制氮工艺及注气后的采油完井方式、方法。

As one of the extensively used EOR methods, gas drive has a better oil displacement effect. Especially nitrogen injection, because it is apt to acquire, non-corrosive,and is suitable to most of the reservoir geologic structure and the physical property of crude oil, it is used most extensively, and represents the development direction of EOR at present. This paper took Yanling oil field as an example, briefly introduce the EOR mechanism of nitrogen injection, construction of nitrogen injection units, nitrogen generating technological process, completion mode and method after nitrogen injection and so on.