寻找海相油气新领域—从南海北部“残留特提斯”谈起

SEARCH FOR NEW DOMAINS OF MARINE ORIGIN PETROLEUM:“REMAINED TETHYS” IN THE NORTHERN SOUTH CHINA SEA

我国近海已发现的油气大部分产于陆相第三系，为开拓找油新领域，解决好目前油气地质储量不足的问题，提出寻找中生代海相油气，为此，从探讨南海特提斯演化历史入手，阐述了海相油气的成烃－成藏地质条件和沉积环境，并将珠江口地东部潮汕坳陷，台西南盆地和南海北部陆坡区列为勘探的首选地区。

Most reserves of hydrocarbon offshore in China are discovered in Tertiary terrestrial formations.In order to open new domains for oil exploration and solve the problem of insufficient remaining reserves,it is necessary to search for Mesozoic marine origin petroleum.By discussing the evolution history of South China Sea Tethys,this paper illustrates sedimentary environments of marine sequences and geological conditions of hydrocarbon generation and accumulation in this region.Finally,it is suggested that the Chaoshan depression in Pearl River Mouth Basin,the Southwest Taiwan Basin and the Northern South China Sea slope should be preferential exploration areas.