东营凹陷烃源岩低温催化酯水解生烃动力学研究

Hydrolysis and hydrocarbon generation kinetics of fatty acid ester catalyzed by source rocks of Dongying depression at low temperature

选用十八烷酸甲酯为模型化合物,以东营凹陷沙三和沙四烃源岩为载体,采用动力学方法考察了盐度、pH值、温度和压力对脂肪酸酯水解生烃反应的影响,求得了反应动力学参数。结果表明,烃源岩对脂肪酸酯水解生烃反应具有催化作用,与沙四烃源岩相比,沙三烃源岩作用下酯的水解反应活化能要大,这与烃源岩中的粘土含量有关。

Methyl stearate was chosen as model compound absorbed by S3 and S4 source rocks of Dongying depression. The effects of salinity, pH value, temperature and pressure on the hydrolysis and hydrocarbon generation of fatty acid ester were investigated by kinetics method, and the kinetic parameters were obtained. The results show hydrolysis and hydrocarbon generation of fatty acid ester can be catalyzed by source rocks. The activation energy of hydrolysis catalyzed by S3 is bigger than that by S4, which is correlative to contents of clay,