有关油气初次运移问题的探讨

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DISCUSSION ON PRIMARY MIGRATION OF HYDROCARBONS

摘要: 初次运移不仅是石油地质学中的基本理论问题,而且对油气的实际勘探工作也有极其重要的指导意义。遗憾的是,至今这一课题仍处于众说纷云的不解状态。本文就几个问题大胆地提出一些看法供大家参考,望能起到抛砖引玉的作用。

Abstract: In general, capillary is a resistance to primary migration of hydrocarbons. Only under certain conditions can capillary pressure be effective. As regards the closed regime of capillary, gas is more easily sealed than oil. Migration stage changes with hydrocarbon generation stage. In fact, there is no fixed migration stage. It is better to make use of compaction curve in combination with geochemistry data to define the migration stage. Compaction and abnormal highpressure are closely related to each other. During migration of petroleum an important role is assigned to geopres-sure. But in practice, how to correctly understand this role and how to judge from the compaction curve stilll remain unsolved.

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