东海西湖凹陷渐新世花港组轴向水系沉积机制探讨

Discussion on Depositional Mechanism Controlled by Axis-wise Drainage in Huagang Formation(Oligocene)of Xihu Trough, the East China Sea

陈琳琳

Chen Linlin

上海海洋石油局规划设计研究院 上海 200120

Planning & Designing Institute of Shanghai Offshore Petroleum Bureau

西湖凹陷花港组系以构造控相为主的陆相沉积,现有钻井资料与区域地质分析已经揭示了受构造格局控制的盆内水系分布特征。作者依据钻井资料,对沿轴向水系分布的龙井二井、花港一井、玉泉一井、玉泉二井花港组展开构造旋回层分析,重新建立了花港组盆地充填史,为陆相层序地层学对比提供了钻井分析方法,并为井间砂体成因对比提出新的依据。

Huagang Formation,in Xihu Trough,is tectonic controlling terrestrial deposits,well data and regional geologic analysis have demonstrated tectonic controlled drainage system distribution.Based on some wells's data,this paper gives emphasis on tectonic cyclothems analysis in Longjing Well 1?Huagang Well 1?Yuquan Well 1 and Yuquan Well 2 which are lined along axis wise drainage,re establishes the basin fill history,provides well data analysis for terrestrial sequence stratigraphy,and put forwards new points on well to well connection of sand bodies.