Exploration potential of Songnan low-uplift in the deep water region,Qiongdongnan basin

Songnan low-uplift lies in the middle part of the central depression of Qiongdongnan basin.According to the research on sequence stratigraphy and sedimentary facies and analysis of hydrocarbon accumulation conditions,it's surrounded by hydrocarbon sag,in full of oil and gas;There is Four types of reservoir, such as reef limestone,channel sandstone,littoral sandstone and (fan) delta sandstone, and forming reservoir-caprock assemblage;Major forming channel lithologic (structural-lithologic) traps of shallow burial depth,structural traps and structural-stratigraphic traps of mid-deep burial depth; With perfect hydrocarbon accumulation condition.Based on these conclusions,the Songnan low-uplift is divided into west Songnan low-uplift (faulted) anticline structural zone and east Songnan low-uplift faulted anticline,faulted structural zone.The west Songnan low-uplift (faulted) anticline structural zone is selected as the preferential plays for exploration;Yongle X-1 is selected as the preferential prospect.