Abstract: For a better simulation of the natural degradation of source rock Kerogen under experimental conditions,pyrolysis experiments on two kinds of source rock samples from Xinjiang and Jilin were carried out by means of high pressure differential thermal analyser(DTA).The pyrolysis DTA Curves were obtained under a linear rise of temperature of 10℃/min and a pressure of 1~60 atm respectively.The pyrolysis kinetics were investigated with the endothermal peaks in their DTA curves using integral method and differerntial method on an overall first order kinetic model.The kinetic parameters were calculated.It was shown that the pyrolysis of kerogen was retarded by pressure,and some effects of pressure on the pyrolysis kinetics were also investigated.Furthermore,a pressure factor f was proposed,and a new pressure kinetic model was established.Results indicate a fair agreement between experimental and calculated data by using the suggested model.

摘要： 在实验室条件下,利用压力差热分析仪(DTA)分别对新疆和吉林两种生油岩做了压力热解实验.获得了试样在压力1～60atm、升温速率为10℃/min条件下的热解DTA图谱,并采用总包一级反应动力学模型的积分法和微分法求得了动力学参数.结果表明,压力对于酪根的热降解有阻滞作用,对其热解动力学参数有一定的影响,文中还提出了压力因子f——反映压力对热解的阻尼作用;建立了新的压力热解动力学模型,检验结果表明,模型计算值与实验数据吻合较好.

关键词: 主油层, 热解, 实验室试验, 模拟试验, 动力学, 差热分析油气生成