有关煤成烃的基本认识

SOME BASIC UNDERSTANDINGS OF COAL-GENERATED HYDROCARBONS

在煤化作用过程中，煤岩组分产出气相和液相物质的同时，固相煤岩组分本身也遭受改造。现今的固相煤岩组分与已产出的气相和液捐物质都是它们共有“前身”演化的“产物”，所以只根据固相煤岩组分的生烃潜能作为评价油气资源的依据还不够理想。煤在短时间高温条件下的热演化，与煤在漫长地质时期、低温条件下自然煤化作用过程中的热化有本质差异，用热解实验方法研究煤成烃尚存在一定问题。煤层内的气处在吸附一解吸和运移的动态平衡状态，决定煤层含气的主导因素是煤层的储气和运移条件，生烃潜能不起主导作用。

During coalification, the solid phase rnacerals themselves may be reformed while thegaseous and solid phase rnacerals materials are preduced from rnacerals. All the present producedconstituents, including the solid phase macerals and the gaseous and liquid phase rnaterials, arederived from the same precursor. Thus, it will not be ideal to use only the potential hydrocarbons-preducing capacity of solid phase macerals as the basement to evaluate the rmurces of oiland gas. The short-time and high-temperature evolution of coal is essentially different from thelong-time and low-temperature evolution of the natural coaJification, so, there are some problemto study the coal-generated hydrocarbons by pyrolysis methed. The gas within coal searn is inthe dynarnic balance state of absorbing-desorbing and migration. As for the gas content of coalsearn, its determinant factor is the gas storage and moving condition in the coal searn, and thepotential hydrocarbons-preducing capaci ty can not play a leading role.