Abstract: The water displacement efficiency in Beir Oilfield is low, especially the ultra-low permeable reservoir in Xi 11-72 well field. The paper studies the feasibility of air injection in the well field by bench scale experimental study, and draws the conclusion that the displacement efficiency could be advanced by air injection. The displacement efficiency of air injection can reach 57.14% when injecting 15 PV, while the water displacement efficiency is 34.95%. In slim line low-temperature oxidation experimentation and combustion tube high temperature oxidation experimentation, oxygen is exhausted in large quantities and low-temperature oxidation occurs. So the method of air injection can be adopted in the reservoir of Xi 11-72 Well Field of Beir Oilfield.

Key words: Beir Oilfield, air injection, enhance recovery, oxidation experimentation