| dc.description.abstract | During the process of petroleum exploration, the concept of Petroleum System had become a main part of hydrocarbon potential analysis, in which the evaluation of source rock is especially noticed. The evaluation of source rock includes quantity and quality of hydrocarbon. In analyzing the quantity of hydrocarbon, the content of organic carbon is important, whereas the organic types and thermal maturity are concerned in quality of hydrocarbon. As for today, organic richness, organic types and thermal maturity are generally used for evaluation.
In order to discuss the relationship between organic material and thermal maturity, four analytic methods are used in this study： maceral composition analysis, elemental analysis, vitrinite reflectance measurement and Rock-Eval pyrolysis. The former two methods will be used to discuss the characteristics of organic materials, whereas the latter two methods are used to disscuss their maturities. The samples studied include coals and coaly shales of Mushan Formation, Shihti Formation and Nanchuang Formation in NW Taiwan, coals and an oil shale from Mainland China in addition to Green River shale and Woodford Shale from U.S.A. Furthermore, maceral mixtures separated from DGC are also studied.
The analytic results indicate that different organic matters will affect the result of maturity. Plotting a curve with H/C ratio vs vitrinite reflectance, we find that even though the heated environments are different in Taiwan and Mainland China, their organic micelles exhibit a similar trend in the process of coalification. As a whole, the curve has a turning point at Ro=0.5％ and H/C=0.1 in this study. | en_US |