东海陆架油气勘探的新领域

NEW PROSPECT FOR HYDROCARBON EXPLORATION IN THE SHELF OF THE EAST CHINA SEA

基于东海陆架区的物探、化探和钻井等方面资料分析了陆架的地层结构和构造特征。东海陆架盆地具有叠合复式盆地的特征。新生代含油气盆地之下叠置了中生代和古生代的盆地和含油气层 ,巨厚的前第三系为油气提供了丰富的物质基础。化探资料以及荧光、酸解烃和甲烷等指标表明 ,在海礁凸起等高构造区有极好的油气异常显示 ,油气存在于前第三系之中。钻探证明 ,瓯江凹陷东侧 (又称丽水凹陷 )的侏罗系中有烃源岩 ,前古生界的变质岩中有油气显示。因此 ,海礁凸起、渔山凸起、瓯江凹陷东侧。

In terms of geophysical, geochemical and drilling data etc , from the shelf of the East China Sea, this paper analyzes the stratigraphic structure and tectonic features of the shelf and indicates the stack and composite property possessed by the shelf basin It can be inferred, through the research on stratigraphic structure and the geophysical properties of the Pretertiary, that there exist very thick strata of Pretertiary under the Cenozoic Basin of the East China Sea, which provides material basis for superimposition basins Geochemical data of exploration such as fluorescence, Acid extracted hydrocarbon and methane all indicate that some tectonic heights, for example Haijiao Uplift appears as positive abnormal. It shows oil and gas may exist in the Pretertiary Drilling data prove that there are bumpy oil and gas in Jurassic and hydrocarbon traces in the Prepaleozoic located in the east side of Oujiang Depression (also named as Lishui Depression) To sum up the above analysis, we make sure that the Pretertiary of Haijiao Uplift, Yushan Uplift and East Flank in Oujiang Depression and the transitional zone between Changjiang Depression and Xihu Depression is a new prospect of time and space for hydrocarbon exploration in the shelf basin of the East China Sea