本文在综合分析海峡两岸有关资料的基础上,提出我国东南沿海在白垩纪早期曾受到海水的影响。根据PK—2井中的菊石属于地中海沿岸地理亚种这一事实,提出我国东部在白垩纪早期可能与特提斯海有某种联系。最后,通过有机地球化学指标,镜煤反射率的测定和该区下白垩统海相地层中含有丰富的生物,指出该地层有良好的生油、储油气的可能性。 Based on a comprehensive analysis of relevant data on both sides of the Taiwan Strait, this paper suggests that the southeast coast of China had been affected by seawater in the early Cretaceous. Based on the fact that ammonium in PK-2 well belongs to the geographic sub-species of the Mediterranean coast, it is suggested that there may be some connection between the eastern Cretaceous and the Tethys in the early Cretaceous. Finally, through the organic geochemical indicators, the determination of vitrinite reflectance and the abundance of organisms in the Lower Cretaceous marine strata, it is pointed out that the strata have the potential of generating oil and reservoiring gas.