摘要
近两年来开展了新一轮大调查 ,根据长排列多道地震资料显示 ,北黄海在印支—燕山运动形成的隆起背景上 ,分布着 4个中、新生代拗陷 ,最大沉积厚度 80 0 0 m,其中晚侏罗—早白垩世沉积厚度 60 0 0 m,是拗陷中主要的生储油层 ,局部构造类型主要为断块、断背斜、潜山及反转背斜等 ,具有形成中小型油气田的潜力。南黄海是下扬子后加里东台地的主体 ,于中部隆起及其两侧 ,广泛分布着厚度大于 50 0 0 m的较稳定的晚古生代—早中生代海相地层 ;中生代以来 ,在中部隆起南侧发育了裂谷型盆地 ,可与苏北盆地对比 ;其北侧 ,则在苏胶造山带与中部隆起之间形成前陆盆地 ,其面积约 4万 km2 ,古生代及中、新生代沉积厚度可达 1 50 0 0 m,具有海相及陆相多层系、多类型的成藏系统 ,局部构造类型多 ,晚期成藏条件好 ,具有形成大中型油气田的潜力。南黄海的“黄北前陆盆地”是本区最有远景的战略勘探区。对中部隆起区 ,应加强研究 。
The South Yellow Sea is the main body of the Lower Yangtze platform, whose middle uplift area and the two sides have widely distributed stable marine facies strata of more than 5 000 m in thickness. Rift-type basins have spread on the south side of the middle uplift area since Mesozoic, making it comparable to the Subei basin in Jiangsu Province, but foreland basins on the north side spread between the Sulu orogenic belt and the middle uplift area of the South Yellow Sea, whose area is 4×10 4 km 2 and the Paleozoic-Mesozoic-Cenozoic sedimentary thickness is up to 15 000 m. It is proposed that we can establish a national oil and gas strategic area, which is covering about 10×10 4 km 2 of the Huangbei basin (the North Yellow Sea basin) and the middle uplift area in the South Yellow Sea, to strengthen investigation and evaluation in order to find a large-scale base for offshore oil and gas exploration and exploitation.
出处
《海洋地质动态》
2002年第11期17-20,共4页
Marine Geology Letters
