In this artide

we analyse the oil oxidation characteristics of the light oil at different oxygen concentrations（21% and 8%）and in the presence of the reservoir rock by the static oil oxidation tube and thermogravimetry/derivative thermogravimetry（TG/DTG）. According to the Arrhenius oxidation kinetics model

the influence of the factors on crude oil oxidation activity is characterized quantitatively. The results show that the lower oxygen concentration can reduce the oxidation reaction rate

and in addition

the reservoir rock has strong catalytic impacts on oil oxidation

which can promote the oxidation reaction. The oxygen concentration of the remaining gas drops significantly after the oxidation in a lower oxygen concentration

which greatly improve the safety of air injection displacement. The thermal analysis shows that the crude oil exhibits three stages of low temperature oxidation

fuel deposition and high temperature oxidation. The positive impact of cuttings on the crude oil oxidation is stronger than the negative impact of the lower oxygen concentration

which can significantly reduce the activation energy of crude oil at low oxygen environment. It is benefit to the application of lean oxygen injection displacement.