【摘要】 对近几年南鄱阳坳陷油气勘探取得的地球物理和钻井新资料进行综合分析,并以南昌凹陷为例,解剖赣江断裂带的运动学特征及其对盆地形成、演化和油气成藏条件的控制作用。赣江断裂带是 NNE向构造带,控制了一系列中—新生代盆地的形成。提出了南鄱阳坳陷的形成和演化是在燕山期古构造格局的限制下,受控于赣江断裂带的活动,以走滑伸展为主要特征。早期(冷水坞期)具走滑—拉分盆地性质,中期(周家店期—南雄早期)为左行走滑—伸展盆地,晚期转化为右行走滑伸展(南雄中晚期)和新生断陷盆地(清江期)。南鄱阳坳陷油气成藏以二叠系烃源岩二次生烃、晚期成藏为特色,具备上、下(构造层)两套成藏组合,其成藏条件与赣江断裂带的构造控制作用密切相关。更多还原

【Abstract】 Poyang Basin is a superposition basin of Mesozoic-Cenozoic and Mesozoic-Paleozoic in the middle-north part of Jiangxi Province and South Boyang Depression is the beneficial area of oil and gas reservoir formation in the basin. Through analyzing comprehensively the data on oil and gas exploration in the depression, it is pointed out in the paper that the formation and evolution of the basin were mainly characterized by the strik-slip expansion on the basis of the palaeotectonic framework of Yanshan epoch and under the control of Ganjiang fault belt activity, being strik-slip-tension basin in the early stage (Lengshuiwu Age), left-motion strik-slip expansion basin in the middle stage (Zhoujiadian Age-early Nanxiong Age) and right-motion strik-slip expansion (middle-late Nanxiong Age) and nascent faulted basin (Qingming Age) in the late stage. The oil and gas reservoir formation in South Poyang Depression was characterized by the secondary hydrocarbon generation of Permain source rocks and the late reservoiring and there were up and down (synthem) two series of reservoiring assemblages in the depression. Their reservoiring conditions were closeld related to the control of Ganjiang fault belts.更多还原