济源凹陷中、新生界盆地恢复

济源凹陷位于华北盆地西南端,为一中、新生代叠合盆地。由于对中生代晚白垩系以及早第三纪原始地层的沉积厚度认识不到,影响凹陷油气成藏、资源潜力以及勘探目标评价和选择。通过研究表明:①济源凹陷早第三纪末期存在一期明显的剥蚀作用,剥蚀厚度具有由西南到北东方向逐渐变小的变化特征;②现今凹陷内白垩系"残留"地层的原始厚度与西承留剖面原始沉积厚度基本一致,表明现今凹陷内白垩系"残留"地层基本上为原始地层厚度,晚白垩纪时期济源凹陷不存在一期大规模的抬升剥蚀作用。

Recovery in Cenozoic Basin in JIYUAN Sunken

JiYuan Depression is a mesozoic-cenozoic superimposed basin and located in the southwestern tip of the North China Basin.It affects Sag hydrocarbon accumulation,resource potential,evaluation and choice of the exploration target,because people hasn’t realized the primitive stratum’s sedimentary thickness of Mesozoic late cretaceous and early Tertiary.It is shown: ① The final stage of early Tertiary in the JiYuan Depression exists a session of obvious eroding effect and erosion thickness get smaller from southwest to the north-east direction;② It shows that residual stratum mainly is the primitive stratums’ thickness in today’s sag of Cretaceous system and JiYuan Depression don’t exist a large-scale uplift role of late cretaceous,which the residual stratums’ primitive thickness are the same as the profiles’s thickness in Xi Chenliu of Cretaceous system.