石油稳定同位素地球化学新进展

本文简述了我国氢、碳、氧稳定同位素标准物质的研究情况和有机质稳定同位素分析技术的进展,总结了我国有机氢、碳稳定同位素研究中的一些重要方面。煤和干酪根碳同位素组成的变化主要是与其类型和沉积环境有关,而与其热演化阶段无关。根据氯仿A、原油及其族组分碳同位素相似性进行油源对比是一种好方法。应用天然气组分的氢、碳同位素能有效地判识天然气的成因类型、成熟度和进行油气源岩对比。应用碳同位素数据还能判识地表油气化探烃气异常的成因和来源,但在实际应用时要注意气态烃可能遭受生物降解作用碳同位素分馏的影响。

The New Development In Petroleum Stable Isotope Geochemistry

In this paper, the study situation of stable isotope standard sample for hydrogen, carbon and oxygen, and the development in analytical technics of organics carbon have been stated generally. From that, conclusions of some important aspect about study on stable isotope of hydrogen and carbon have been drown: First, the variety in composition of coal and kerogen is mainly connected with its type and environment of sedimentation, and has nothing to do with its thermal evolution stage; Second, making oil rock compare by using carbon isotope in chloroform-A, crude oil and its family is a efficent method; The last, using the data of isotope of carbon and hydrogen in natural gas, we can decide the origin-type, maturity of natural gas, and make oil origin compare, and we can decide the origin and cause of the hydrocarbon anomaly of surface geochemical exploration for petroleum by applying the data of carbon isotope as well. However, for composition of carbon isotope could be affected by biological degratation and d stillatic,we must pay attention to it.