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主要针对干酪根成烃动力学参数的特点,应用MATLAB优化工具箱,对动力学参数已知的干酪根的生烃热解曲线进行固定指前因子和变指前因子方法进行标定。并将MATLAB优化工具箱函数标定的结果与已知的动力学参数在实验室热解生烃曲线和地质条件外推生烃曲线分别进行了比较。结果表明,MATLAB优化工具箱函数完全可以标定出可以满足要求的动力学参数。提出了对不同复杂结构的干酪根样品固定指前因子法和变指前因子法的两种标定方法。对于活化能近似正态分布和活化能分布较为单一的样品可以用固定指前因子的方法进行标定,其他活化能分布较为复杂的样品可以用变指前因子的方法进行标定,且结果均可以达到较为满意的结果。
According to the characteristics of kinetic parameters of kerogen hydrocarbon generation, MATLAB optimization kit was used to calibrate the hydrocarbon generating and pyrolysis curves of kerogen with known kinetic parameters by using the fixed pre-exponential factor and the variable pre-exponential factor. The calibration results of MATLAB optimization toolbox were compared with the known kinetic parameters in the pyrolysis hydrocarbon generation curve in laboratory and the extrapolation of hydrocarbon generation curve in geological conditions respectively. The results show that the MATLAB optimization toolbox function can completely calibrate the dynamic parameters that can meet the requirements. Two calibration methods of fixed pre-exponential method and variable pre-exponential method for kerogen samples with different complex structures were proposed. Samples with a relatively normal distribution of activation energy and a relatively single distribution of activation energy can be calibrated using a fixed pre-exponential method. Other samples with more complex activation energy distributions can be calibrated with variable pre-exponential factors and the results can be achieved More satisfied with the results.