下扬子海相中、古生界地质结构特征及选区评价

通过对下扬子地区地震、钻井、重力、航磁及地表露头等资料的分析,认为由于基底及沉积盖层的不同特点,海相中、古生界经多期次挤压、拉张改造后,各区具有不同的地质结构特点.应根据各地区的不同地质结构来选择油气勘探方向,在洪泽高邮区块应为古潜山和不整合面油气藏;滨海-大丰区块为内幕构造油气藏;句容-海安区块为下古生界构造油气藏,同时要兼顾上古生界及中生界;宜兴-常熟区块为目前勘探暂缓地区.

Geological Structural Features and Selected-Area Evaluation of Meso-Paleozoic Marine Group in Lower Yangtze Region

By analyzing the of seism,well drilling, gravity,aeromagnetics and surface outcrop in Lower Yangtze region,it is considered that the Meso Paleozoic marine group has different features of geologic structure in different area after the reworking of multiple squeezing and extension due to different features of basement and sedimentary cover The exploration direction would be chosen according to the different geologic structural features in different areas, buried hills and unconformity reservoirs would be chosen in Hongze Gaoyou block as an object of exploration,internal structural reservoirs would be chosen in Binhai Dafeng block,Lower Paleozoic structural reservoirs would be chosen in Jurong Hai'an block,and Upper meso Paleozoic erathem is considered simultaneously,Yixing Changshu block is an area of exploration deferment