Geochemical Characteristics of the Natural gas Migration in the Dongfang 1-1 Gasfield,South China Sea
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摘要: 本文通过莺歌海盆地东方１－１气田天然气地球化学特征的研究，探讨了天然气运移的地球化学指标。研究表明，低分子正构烷烃、异构烷烃与正构烷比值、芳烃与链状烷烃比值、△Ｒ３参数、同位素及非烃组分可作为较好的天然气运移地球化学指标。这些地球化学指标在垂向上的变化规律显示了东方１－１气田天然气垂向运移的特点。Abstract: The geochemical parameters of the natural gas migration were disccussed in the paper basedgemical study of natural gasesin the Dongfang 1-1 gasfield, Yinggai Basin, South China Sea.showed that low molecular n-alkane,ratio of isoalkanes to n-alkane,ratio of aramatics ratio of isoalkanes to n-lkanes ratio of aramatics to n-alkcnes,δ13value of alkanes and nonhydrocarbon gas content, could be used as geochemical parameters of thegas migration. The vertical variations of these parameters indicated the vertical migration featureralgases in the Dongfang 1一1 gasfield
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Key words:
- natural gas /
- oil and gas migration /
- South China Sea
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[1] 1 郝石生等.烃烃扩散系数研究及天然气运聚动平衡原理石油学报.1991(12): 17-24.
2 戴金星等.中国天然气地质学.北京:石油工业出版社.1992,29-30 -
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