STUDY ON THE MODELS OF HYDROCARBON GENERATION AND EXPULSION FROM VARIOUS SOURCE ROCKS IN COAL-BEARING ENVIRONMENTS

Using new technologies such as the thermo-pressure simulation experiment and hydrocarbon geochemistry,the hydrocarbon generation and expulsion models for various source rocks in coal-bearing environments were studied in detail on the bases of the systematic analysis and summarization of a number of geochemical and geological data.There are dramatic differences in hydrocarbon generation potential among dark mudstone,carbargillite and coal in coal-bearing environments.The coal and carbargillite formed in shore swamp are better than the mudstone,but the mudstone formed in relative deep to shallow lacustrine (sea) is better than the coal.Nine hydrocarbon generation and expulsion models for four organic matter types and two main rocks in coal-bearing environments were established,and the models were tested byreal geological profiles.The ability of hydrocarbon expulsion for mudstone with type Ⅲ1-Ⅱ1 organic matter is in an advantageous position comparing with coal and carbargillite in coal-bearing environments.