【摘要】 气-源对比是天然气勘探开发和油气理论研究的重要课题,同位索地球化学是气-源对比的重要手段,尤其是碳、氢稳定同位素和稀有气体同位素已经被广泛应用于烃源岩、母质环境、源岩热演化程度、成藏过程和天然气混源判识,系统的介绍了利用碳、氢以及稀有气体同位素判识天然气成因来源,利用甲烷碳同位索与源岩热演化程度数学模式进行气源追索,利用甲烷氢同位索及其空间分布判识母质环境和成藏过程,利用稀有气体同位素判识是否深部来源气体并利用其年代积累效应进行气-源对比等方法。更多还原

【Abstract】 Gas-source correlation is an important task for natural gas exploration and oil-gas theoretic research. Isotopic geochemistry is an effective means for gas-source contrast, especially carbon and hydrogen isotopes, which have been widely used to trace source rocks, to identify the deposit conditions of parent substance, to calculate the evolution stage of source rocks and the process of reservoirs forming, and to estimate mixed gas. In this paper we summarize some methods, that is, to trace the source rocks of natural gas by using, carbon hydrogen and rare gas isotopic character; to trace gas source by using the mathematic model of methane and evolution stage; to identify the deposit conditions of parent substance and the process of reservoirs forming by using the hydrogen isotopic character of methane; to identify the possible source of deep area by using rare gas isotopic character and to calculate the mixing ratio by using the function of time-accumulation-emotion.更多还原