【摘要】 利用自制的天然气C3~C8烃浓缩器,对天然气中微量C4~C7单体烃进行了浓缩,以此为样品做了试验分析研究,进而阐述了四川盆地不同成因天然气C4~C7烃类指纹的分布特征,并得出以下结论:天然气中C4~C7烃类组成、分布特征不仅与生烃母质密切有关,而且受成熟度的控制,还与天然气的运移作用有关;不同母质来源、不同热演化阶段的天然气,C4~C7轻烃的组成也明显不同;同时,天然气在运移过程中,由于地层水的溶解作用,轻烃的组成也会受到影响。更多还原

【Abstract】 With self-made concentrator of C₃-C₈ hydrocarbon, micro C₄-C₇ free hydrocarbon in natural gas are concentrated and analyzed as experimental samples. Furthermore, the distribution characteristics of C₄-C₇ hydrocarbon fingerprints of the natural gas with different origins in the Sichuan Basin are expounded in this paper. The result shows: the compositions and distribution characteristics of C₄-C₇ hydrocarbons not only are closely related with hydrocarbon-generating parent materials, but also are controlled by theirs maturations and gas migrations; ②The compositions of C₄-C₇ hydrocarbons obviously varies with the parent material sources and thermal evolution stages; ③Moreover, owing to the solution of formation water, the compositions of C₄-C₇ hydrocarbons are affected during the migration of natural gas.更多还原