东海陆架盆地南部新生代盆地原型及类比与油气勘探意义

Cenozoic Prototype,Analogy and the Significance of Oil and Gas Exploration in the Shelf Basin of Southern East China Sea

在新生代区域构造演化分析的基础上,运用平衡剖面技术,同时参考前人研究成果,将东海陆架盆地南部新生代盆地原型演化划分为3个阶段。对各阶段盆地原型结构进行了分类,总结出研究区新生代以来主要受2期构造-热体制控制,具备典型断-坳原型叠合结构。通过与勘探程度较高的渤海湾复式盆地进行类比,认为区内东部坳陷带继承性断-坳叠合结构较西部坳陷带非继承性断-坳叠合结构更具广阔的油气勘探前景。

Based on the analysis of Cenozoic regional tectonic evolution,the technique of balanced section and reference of predecessors' researchess were used,the prototype evolution of Cenozoic in the shelf basin of East China Sea was divided into three stages,and each stage of the prototype structure of the basin was classified.It was summarized that the study area was mainly affected by two Cenozoic tectonics-thermal regimes and it was a typical fault-sag prototype superposition structure.By comparing with the Bohai Bay Basin which has the high degree of exploration,it is considered that the eastern depression belt which has an inherited fault-sag superposition structure has a broader prospects for oil and gas exploration,compared with the western depression belt of the southern shelf basin in the East China Sea.