游离态轻烃和溶解态轻烃在自下而上的垂向运移过程中和运移通道表面很容易发生物理吸附作用,并且某层位的物理吸附轻烃的组成和含量与运移到该层位的游离态轻烃和溶解态轻烃的组成和含量有关,而这二者又直接来源于油气藏,其组成和含量上的特征也可反映油气藏的性质和特征。因此 Light hydrocarbons and dissolved hydrocarbons in the free state are prone to physical adsorption during vertical bottom-up migration and transport channel surface, and the composition and content of physical adsorption of light hydrocarbons in a horizon are transferred to The composition and content of light and dissolved light hydrocarbons in the horizon are directly related to the composition and content of light hydrocarbons. Both of them are directly derived from oil and gas reservoirs. Their composition and content may also reflect the nature and characteristics of oil and gas reservoirs. therefore