Abstract: Based on the analytical data of asphaltenes in dark mudstones from No. 3 Sha Section of Paleogene of Dongying basin in respect to their color (under microscope), elements(C, H, O), infrared spectra and free radical contents, the evolution and role of asphaltenesin the transformation of organic matter into petroleum is studied. It has been suggested that the threshold depth of such transformation may be determined from the structural changes of asphaltenes.

摘要： 本文根据东营盆地下第三系沙三段暗色泥岩中沥青质的颜色(镜下观察),元素(C、H、O)、红外光谱和自由基含量的分析资料,研究了有机质向石油转化过程中,沥青质的演化规律及其所起的作用,并且认为根据沥青质的结构演变,可以判别有机质大量转化成石油的门限深度。