生油岩原始有机碳恢复方法的探讨

本文在前人工作的基础上,根据物质平衡原理和热模拟实验揭示了干酪根演化过程,探讨了沉积有机质在热降解中的转化与“消耗”,确定了各种类型成油母质在不同成熟阶段中碳的演化规律,找出了生油岩实测有机碳与干酪根中碳的对应关系,提出了各种生油岩有机碳恢复系数。文中给出了泥质岩和碳酸盐岩的应用实例。

THE RESTORATION OF INITIAL ORGANIC CARBON IN SOURCE ROCKS

This paper presents the calculations on the evolution of the main elements in kerogens and the restoration coefficients of the kerogen carbon, based on the law of conservation of matter. However, the liquid and gas organic constituents besides kerogen in the source rocks shouled be taken into consideration. The relation between total organic carbon and the kerogen carbon in the same source rock was established. The restoration coefficients of initial organic carbon in source rocks are postulated for different type of organic matters at different stages of maturation. Comprehensively considering the evolution of kerogen, the type of organic matter and the content of bitumen remained in source rock, the restoration coefficients shown in this article are accurate, valid and useful in both mud rocks and carbonate source rocks.