藻干酪根X射线衍射特征及其与油气生成的关系

通过对加水热模拟实验中藻干酪根X射线衍射（XRD）特征的分析．探讨了其XRD谱图的演化特征、结构参数间的关系及其与油气生成的关系。研究结未发现，藻干酪根的XRD参数间均具良好的相关性，与干酪根的H／C原子比也都具有较好的相关关系，可作为有效的热演化指标，其中以Fa和D002最好。该藻干酪根开始生油时对应的Fa和D002分别为0．35和3．8A,生油高峰时对应的Fa和D002分别为0．50和3．65A。

X-RAY DIFFRACTION CHARACTERISTICS OF ALGAL KEROGEN AND ITS RELATION WITH THE GENERATION OF OIL AND GAS

This paper presents the X-ray diffraction data of algal kerogen obtained by hydrous pyrolysis and discusses the correlation between the structural parameters of algal kerogen and the evolution of oil and gas. There is a good correlation between structural parameters and between structural parameters and H/C atomic ratios. They are all used as available thermal evolution indices of organic matter, but Fa and b002 are best. Fa and D002 at the time algal kerogen begins generating oil are 0. 35 and 3. 8A. Fa and D002 at the time the oil-generating peak appears are 0. 5 and 3. 65A.