南黄海盆地构造特征及油气地质意义

TECTONIC CHARACTERISTICS OF THE SOUTH YELLOW SEA BASIN AND IMPLICATIONS FOR PETROLEUM GEOLOGY

南黄海盆地发育于前南华纪变质基底之上,是一个大型叠合盆地,经历了多期成盆和多期构造改造,形成了海相盆地和中新生代断陷盆地叠合改造型残留盆地。盆地演化历经南华纪—早、中三叠世海相地层发育期、晚白垩世—古近纪箕状断陷发育期和新近纪—第四纪坳陷发育期,为一典型地台—断陷—坳陷多层结构的复合型盆地。通过对地震资料解释、区域地质构造特征分析,综合烃源条件和后期保存条件,探讨了南黄海盆地油气远景。

The South Yellow Sea Basin,developed on the metamorphic basement of South China,is a large superimposed basin.It is a residual basin experienced multiphase of basin formation and tectonic transformation characterized by the superimposition of Marine basins and Cenozoic rift basins.It has passed the marine basin stages in Huanan period,the developing stage of early and middle Triassic,the half-graben stage in Late Cretaceous,Paleogene and Neogene,and the depression stage in Quaternary,and is a typical superimposed basin with multilayer structures of platform,rifting and depression deposits.Integrated interpretation of seismic data,regional geotectonics and hydrocarbon accumulation and preservation conditions is provided in this paper for study of the oil and gas potential in the basin.