摘要
本文根据近3×10~4km地震和13口探井及其它地球物理、地质等方面资料,综合分析认为:东海盆地西南部与盆地其它部分在发育演化、构造运动、沉积环境等方面差异甚大。 盆地西南部(杭州湾—冲绳岛断裂以南地区)发育演化经历了断陷—坳陷—隆起—铺盖四个阶段。始新世末期的隆起在研究区演化史上有15～20Ma的沉积间断、剥蚀。这段历程,盆地其它部分未曾经历。其次是区内始新世末期抬升运动,致使始新统及以下老地层受剥蚀,仅始新统最大剥蚀量达1000m,这是盆地内绝无仅有的。第三是第三纪以海相沉积环境为主,特别在始新世,为海侵高潮,海城宽阔达8000km^2,这时盆地东北部正接受陆相沉积。研究区中部(北东向)可能存在超压泥岩及多套生油岩系,应为有利生油气区。研究区可能是盆地最有油气远景地区之一。
Southwestern of East China Sea Basin differ from other part of basin in evolution, tectonic movement, sedimental environment etc.Southwestern evolution of East China Sea Basin may be divided into four stages, i·e·faultdown,downwarp, lift and draping. Sediment interupted 15—20M. Y. during lift movement later Eocene. This proccess did not undergo in other part of basin. Second,it was eroded over 1000 meters during elevating move—ment later Eocene. This scene never took place in other area of basin,Third characteristic is mainly marine facies enviro—nment during Eogene yet transgressive develpment highest peak at Eocene, marine water area about 8000km^2. Northeastern of the bsain is continental deposit. Mudston rock of high pressure may be distributed in the middle part of research area. The oil and gas potential of research area may be best in the basin.
出处
《新疆石油地质》
CAS
CSCD
北大核心
1991年第1期13-22,共10页
Xinjiang Petroleum Geology
关键词
石油
天然气
地质
富集
东海盆地
Eost sea Basin ,Tectonic movement,oil and gas enrichment.
