东海盆地地质特征与油气富集有利地区探讨

GEOLOGICAL CHARACTERISTICS OF EAST CHINA SEA BASIN AND COMMENTS ON THE PETROLIFEROUS PROVINCE

王国纯

Wang Guochun

中国海洋石油总公司海洋石油勘探开发研究中心

Research Center of Offshore Oil Exploration and Development, China National Offshore Oil Corporation

东海盆地是一个以海西褶皱基底,新生代沉积为主的大型盆地。盆地形成经历了断陷—断拗—拗陷—披复四个阶段。构造具东西分带,南北分块的格局。盆内具有多种油气藏类型,油气资源丰富,是一有远景的地区。

The East China Sea Basin is a giant Cenozoic sedimentary basin and the thickness of its sedimentary sequences exceeds ten thousand meters. The basement of the basin probably had experienced Hercynian folding, then had furthermore complicated by igneous rocks. The formative evolution of the basin may be divided into four stages, i.e. faultdown, downwarp, depression and draping during Eocene,Oligocene and Pliocene-Quaternary times, respectively. The tectonic framework is differentiated between the eastern and the western zones and between the northern and the southern blocks. There are various types of oil-gas pools, such as the gas pools and conden-sate oil pools in sandstones, the oil pools in the basement and the oil-gas pools in reefs. It is believed that giant oil-gas pools will be discovered by further exploration activities and detailed researches.

https://doi.org/10.11781/sysydz198701042