苏北盆地部分古生界原油来自第三系源岩的证据

苏北盆地LT1井、D7井、7．43井和L1井等古生界原油的地球化学特征研究表明，它们来自古新统阜宁组源岩。“新生石储”现象主要是新生界源岩与古生界储层呈断层接触造成的。

Geochemical evidence of Paleozoic oil reservoir from Tertiary source rocks in North Jiangsu Basin

The geochemical study of well LT1, D7, ZA3 and L1 in the distribution district of Paleozoic crude oil of North Jiangsu reveals that Paleozoic oil reservoir roots in Paleocene source rocks of Funing Fm. The phenomena of paleo-storage of newborn spread widely in North Jiangsu was caused by a fault contact between Cenozoic source rocks and Paleozoic reservoirs. The conditions of trap, preservation and oil sources must meet synchronously the requirements of crude oil formation, so, the phenomena of paleo-storage of newborn should become a favorable target for the exploration of crude oil resources in the study area in the near future. The positive parts with good conservation and far from water alternation and saddles located lower than positive parts in sag section should be an important aim of prospecting, based on the structure characters of paleo buried hills. Also,in order to promote exploration of petroleum in paleo buried hills,it is necessary to analyse the quality of Paleozoic tap, conditions of oil sources and their conservation.