In recent years, nitrogen has been widely used in enhanced oil recovery (EOR), pipe purging at oil and gas fields, especially in large demand and at long due time for gas drilling.

• 近年来氮气在油气田的应用越来越广泛,主要应用于气体钻井、石油三采、油/气管道吹扫,气体钻井过程中,氮气用量特别大、用时长。