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煤成油的排驱是指煤在热成熟作用过程中,生成的烃类物质在某种动力的驱动下从煤层母体排出至输导层的过程。煤所生烃类排出母体一方面取决于煤所具有的固有内在属性,它包括两个含义:其一是煤原始生烃潜力,它决定了煤中烃类达到含油饱和度的难易程度;其二是煤分子排列格架及分子质点表面性质,它决定了烃类储存空间大小与烃类流动的难易程度。另一方面,外生地质营力的存在是煤层发生排烃作用的必要条件。适当的构造挤压应力及存在通过源岩的输导层（如断裂、层理面、剥蚀面等）以便形成差异应力,为烃类排驱与运移提供了外在条件,这两方面缺一不可。吐哈盆地煤成油的排驱亦正是煤内在属性与外部构造挤压力共同作用的结果。
Coal-to-oil drainage refers to the process of thermal maturation of coal, generated hydrocarbons driven by some kind of power from the coal seam matrix to the guide layer of the process. On the one hand, coal-derived hydrocarbons are derived from the inherent inherent properties of coal and include two meanings: one is the original hydrocarbon generation potential of coal, which determines the ease of hydrocarbon saturation in coal; The other is the molecular arrangement of coal molecules and molecular surface properties, which determines the hydrocarbon storage space size and ease of hydrocarbon flow. On the other hand, the existence of extrinsic geological force is the necessary condition for hydrocarbon expulsion. Proper structure of compressive stress and the presence of conductive layers (such as faults, bedding planes, etched surfaces) through the source rocks in order to create differential stresses provide external conditions for hydrocarbon drainage and migration, both in the absence of One can not. The coal-to-oil drainage in the Turpan-Hami basin is also the result of the synergistic effect of the internal properties of coal and the compression of the external structure.