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Oil oxidation in the whole temperature regions during oil reservoir air injection and development methods
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LIAO Guangzhi,WANG Hongzhuang,WANG Zhengmao,TANG Junshi,WANG Bojun,PAN Jingjun,YANG Huaijun,LIU Weidong,SONG Qiang,PU Wanfen
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Table 1 Oxidation mechanisms and recovery methods of crude oil in different reservoirs.
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| Reservoir type | Light oil reservoir
temperature/°C | Heavy oil combustion front temperature/°C | Main mechanism | Recovery method | | Light oil | <120 | | Dissolution and expansion | Oxygen-reduced air injection | | >120 | | Mainly LTO and oxygenation reactions | Air injection | | Heavy oil | | 200-400 | MTO and oxidized coke formation | Medium-temperature in situ combustion | | >450 | HTO, pyrolysis coke formation, and oxidation
of pyrolysis coke and oxidized coke | High-temperature
in situ combustion |
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