Matlab优化工具箱在干酪根成烃动力学参数标定中的应用

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。

Application of MATLAB optimization toolbox in calibration of dynamic parameters of hydrocarbon generation of kerogen

Based on the characteristic of hydrocarbon generation of the kerogen, Application of M ATLAB optimization toolbox, dynamic parameters of pyrogenation curve of kerogen whose dynamic parameters have been known were calibrated again. The dynamic parameters calibrated with optimization toolbox were compared with the ones which have been known in experimental and geological situations relatively. The results indicated that optimization toolbox was able to calibrate dynamic parameterssatisfactorily. Meanwhile, tow different calibration methods of fixed preexponential factors and alterable preexponential factors of kerogen with different structure. The errors of the results in experimental and geological situations were statisted. The errors of hydrocarbon generation curve in geological situation depended on the ones in experimental situation. Therefor, the standard of evaluating the veracity of the calibrated results was gained.