本文根据东海和邻近海域数十口钻井、数万公里地球物理以及岛屿和底质等调查资料提出东海盆地早第三纪曾经历两次海侵,以始新世这期规模最大。笔者认为东海盆地杭州湾—冲绳岛断裂以北为陆相沉积区,煤系地层发育,似以气为主、油为辅的富集区;其南为海相沉积区,似以油为主、气为辅的富集区。 Based on the data of dozens of wells in the East China Sea and the adjacent sea areas, tens of thousands of kilometers of geophysics and islands and sediments, we propose that the East China Sea basin experienced two transgressions in the early Tertiary, and the largest in the Eocene period. I believe that the East China Sea Basin Hangzhou Bay - Okinawa north of the continental facies sedimentary zone, coal strata developed, it seems to gas-based, oil-supplemented enrichment area; the south of the marine sedimentary areas, like oil-based , Gas-supplemented enrichment area.