普通稠油火烧油层高温氧化反应动力学研究

Study on reation kinetics of high-temperature oxidation of in-situ combustion in ordinary heavy oil

火烧油层过程中相关化学反应颇多,高温氧化反应是火烧油层过程中的重要反应阶段。利用热重分析手段,基于简化的Arhenius方程,建立了高温氧化动力学模型,在此基础上运用等转化率法,推导了高温氧化反应的活化能及指前因子的表达式,进而计算出普通稠油高温氧化反应的活化能为1.395×105 J/mol,指前因子为440.8 s-1·Pa-1,为火烧油层数值模拟提供重要参数。

In-situ combustion includes lots of relevant chemical reaction, high-temperature oxidation is the most important reaction stage of in-situ combustion stage.The paper uses thermo-gravimetric analysis, basing on the simplified Arrhenius equation,established the high-temperature oxidation kinetics model, and uses iso-conversion, inferred the expression of activation energy and pre-exponential factor in high-temperature oxidation, then calculate the activation energy of high-temperature oxidation in ordinary heavy oil is 1.395×10^5 J/mol, pre-exponential factor is 440.8 s^-1·Pa^-1,which offers critical parameters for numerical mod- eling of in-situ combustion.