【摘要】 根据烃源岩地球化学特征,结合有机岩石学、沉积学特征,对南堡凹陷古近系烃源岩有机相进行了综合研究。结果表明,南堡凹陷古近系分布有藻源相、含植源藻源相、含藻源植源相和植源相等不同类型的有机相,有机相类型对烃源岩的生烃条件与有效烃源岩的分布特征具有显著的控制作用:半深湖-深湖藻源相和半深湖-浅湖含植源藻源相富含生烃组分,是南堡凹陷最有利于生烃的有机相;浅湖—三角洲含藻源植源相是在弱氧化—还原环境下形成的陆源高等植物和水生生物的混源相;以陆源高等植物为母质的植源相是生烃能力差的有机相带。更多还原

【Abstract】 Combined with organic petrology and sedimentology characteristics,the organic facies of the source rocks were comprehensively studied according to the geochemistry characteristics.The results show that the zones of the most important source rocks are distributed in the algal,floral-algal,algal-floral and floral facies.The development and distribution of source rocks are controlled by different types of organic facies.The excellent source rocks in the Nanpu sag were developed in the algal organic facies of deep lake-semideep lake and the floral-algal organic facies of semideep lake-shallow lake.The organic matters,which were deposited in a weakly oxidative and reducing environments,were developed in the organic facies of algal-floral organic inputs of the shallow lake and delta.This type of organic facies is chaotic facies of higher plant and aquatic organism,it is also good at generating the hydrocarbons.The relatively poor source rocks were deposited in the floral organic facies,which parent material was higher plant of land sources.更多还原