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| Kinetics of low temperature oxidation of light oil in air injection process |
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HOU Shengming1, LIU Yinhua1, YU Hongmin2, NIU Baolun1, REN Shaoran1
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(1.College of Petroleum Engineering in China University of Petroleum, Dongying 257061, China;2.Research Institute of Exploration and Production, SINOPEC, Beijing 100083, China)
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| Abstract: |
| Air injection process is an effective secondary oil recovery method for deep and lightoil reservoirs with very low permeability and poor water injection. During air injection, low temperature oxidation (LTO) may occur between a small fraction of reservoir oil and oxygen within injected air to produce flue gas (N2 and CO2) and oxygenated products. An improved LTO reaction model was established through analyzing lightoil LTO mechanisms. The kinetic parameters, in terms of the Arrhenius activation energy and reaction frequency factor, were obtained from the results of small batch reactor experiments. The improved LTO reaction model and the derived kinetic parameters were verified by history match of oxidation tube experiments using a thermal reservoir simulation model. The influence of reservoir core on LTO was investigated. The reaction with reservoir core materials has lower Arrhenius activation energy and higher frequency factor than that with oil only. |
| Key words: reaction kinetics low temperature oxidation reaction model low permeability reservoir air injection |
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