关键词: 注空气, 热分析, 氧化反应, 反应动力学, 鄯善原油

Abstract: This paper presents a study on the feasibilities of enhancing oil recovery by injecting air into light oil reservoir in Shanshan oilfield and carries out the accelerating rate calorimeter test research of oilair. While injecting air at high pressure into Shanshan oilfield, so as to improve oil recovery, whether oil sample could become spontaneous combustion at the reservoir condition was investigated. Besides, dynamics parameters of reaction of oilair are obtained. The results show that temperature only increases 8～10℃,after 7.6 days of isothermal aging of oil sample at the reservoir temperature and pressure, and spontaneous combustion was not observed. Moreover, real oil reservoirs have better adiabatic condition, and spontaneous combustion also didn′t happen through the whole progress between accelerated calorimetric and isothermal aging research. Additionally, reaction velocity of oxidation reaction of Shanshan oil sample and air was very high between 150℃ and 350℃. Meanwhile, bond rupture reaction occurred. Activation energy of zero order reaction between oil sample and air was 73.0kcal/mol.as a result, this paper provides theoretic and technology foundation for optimization design of injecting air, in order to improve oil recovery.

Key words: air injecting, caloric analyses, oxidation reaction, dynamics parameters, Shanshan crude oil