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油气运移对油气成藏具有重要意义,但传统的油气运移研究定性的内容较多,定量的内容较少,且一直没有建立起油气运移时间的计算公式。油气运移,实际上就是油气在岩石中的渗流过程。根据渗流力学理论,建立了油气初次运移和二次运移时间的理论计算公式。结果表明,油气运移的时间都很短,与漫长的地质时期相比可谓一瞬,因此,油气运移时间不是制约油气成藏的主要因素。气水或油水分异调整和平衡的时间亦都很短,气水倒置或油水倒置难以维持。运移之中的油气十分分散,且丰度极低,不具有开采价值,目前开采的油气藏都是运移完成之后的油气聚集。应用油气运移时间的计算公式,可定量研究地层的油气运移时间问题。
Hydrocarbon migration plays an important role in oil and gas accumulation. However, the traditional research on hydrocarbon migration has more qualitative and quantitative contents, and has never established the formula for hydrocarbon migration time. Oil and gas migration, in fact, is the seepage process of oil and gas in the rock. According to seepage mechanics theory, the theoretical formula of primary migration and secondary migration time of oil and gas are established. The results show that the hydrocarbon migration time is very short, which is quite short compared with the long geological period. Therefore, the hydrocarbon migration time is not the main factor restricting the hydrocarbon accumulation. The timing of adjustment and balance between gas and oil in oil and water is also very short, gas-water inversion or oil-water inversion is difficult to maintain. The oil and gas in the migration is very scattered, and its abundance is very low, so it does not have the exploitation value. At present, the oil and gas reservoirs that are exploited are the hydrocarbon accumulation after the migration is completed. Applying the formula of hydrocarbon migration time, we can quantitatively study the time of hydrocarbon migration in stratigraphy.