Thermogravimetry and differential scanning calorimetry were performed on a tight oil that was collected from the Wolfcamp shale reservoir, USA. The results indicate that although the oil has similar properties to those of a light oil, it shows similar thermal-oxidative behaviors to those of a heavy oil. Kinetic data of the tight oil as activation energy and frequency factor were estimated by the Arrhenius method. This kinetic analysis could provide us insight to characterize the reactivity of the tight oil, and establish parameter values for kinetic models used in the numerical simulation of the air injection process.