根据成熟度、运移和保存条件等因素的差异，每个石油族群可以分为一个或若干个组群。
Every petroleum family may be divided into one or several groups based on the difference of the factors of maturity, migration, preservation conditions and so on.
由土壤孔隙水流速率差异引起的热弥散和溶质弥散对于了解水热盐耦合运移非常重要。
Thermal dispersion and solute dispersion, resulting from the discrepancies of pore water velocity, are important parameters in studying water, heat, and solute transport in porous media.
模拟结果表明，砂层渗透率的差异可以造成油的运移和聚集在分布面积和含油饱和度上存在较大差异。
Results have show that the big difference of permeability of sandstone influences the area of oil distribution and oil saturation.
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