辽河盆地东部凸起上古生界烃源岩特征

Evalution on Source Rocks of Upper Paleozoic in the East Salient of Liaohe Basin

辽河盆地东部凸起上古生界煤系地层分布广泛。本文根据烃源岩地球化学分析取得的相关数据,分析了辽河盆地东部凸起上古生界煤系地层的分布特征、地球化学特征和热演化特征。从暗色泥岩和煤层的厚度及分布特征、有机质丰度(TOC)、氯仿沥青"A"含量、生烃潜量s1+s2、总烃含量、有机质类型和成熟度等对石炭系、二叠系烃源岩进行了综合评价。研究结果表明,上古生界煤系地层源岩厚度大,有机质丰度达到好生油岩级别,有机质类型主要为Ⅱ-Ⅲ型,烃源岩大多处于成熟阶段,其生烃潜力较大,是本区古生界重要的烃源岩层。

Based on the collected geochemical data of source rocks, analysed the distribution characteristic, geochemistry characteristic and thermal evolution of Upper Paleozoie in the region of interest. The source rock of the Carboniferous--Permian is comprehenseively evaluated in respects of thickness and dis- tribution of the source rock, TOC, chloroform bitumen ＂A＂, overall hydrocarbon content, S1-^-Sz, organic matter types, maturity and so on. Coal--measure source rock in Carboniferous--Permian has heavy thick- ness and extensive distribution in Benxi,Taiyuan and Shanxi Formation. Hydrocarbon source matter mainly produces Ⅱ-Ⅲ Kerogen. which still stay the mature, which is very important for gas and oil explored to develop the research of hydrocarbon generation potential.