从东海油气勘探谈台湾海峡油气地质

上海海洋地质调查局从1974年开始对东海进行了包括反射地震、重力、磁法、测深、浅地层剖面等多种疗法的综合调查,基本上建立了东海的新生代地层层序、构造分区及其构造演化历史。台湾海峡在地理上位于东海陆架的西南延伸部位,但其地质演化既具东海陆架盆地早第三纪构造演化的特点,又深受渐新世至中新世南海深海盆扩张的影响。根据地震资料和钻井资料之对比,台西盆地至少经历了古新世、始新世和中新世三次海侵,从而使其既区别于南海之珠江盆地,又有别于东海陆架盆地。

DISCUSSION OF OIL-GAS GEOLOGY OF THE IAIWAN STRAIT WITH THE OIL-GAS EXPLORATION OF THE EAST CHINA SEA

Comprehensive investigations of petroleum potential in the East China Sea:reflec- tion seismics,gravimetry,magnetometry,echo sounding,subbottom profiling etc.con-ducted by the Shanghai Bureau of Marine Geological Survey since 1974 lead to a gener-al establishment of stratigraphic sequences and tectonic divisions and to reconstruction oftectonic history.Thongh located at the south-west extension of the East China Sea Shelf,the TaiwanStrait shows both characters of the Palaeogene tectonic evolution of the East China Sea ShelfBasin and effect of the South China Sea opening during Oligocene to Miocene.Analysis ofSeismic profiles and drilling data suggest that the Taixi Basin underwent at least three ma-jor marine transgressions Paleocene,Eocene and Miocene,which make it differ from eitherthe Pearl River Basin or the East China Sea Shelf Basin.