封面故事

Cover Story

羌塘盆地北部重力-地震联合反演拟合曲线与深部结构解释剖面。羌塘盆地新生代早期发育大量逆冲推覆构造(见封面底图),导致侏罗系不同层位的海相沉积灰岩、白云岩、泥灰岩、泥岩、页岩、粉砂岩逆冲推覆于上白垩统和古近系陆相沉积红层之上,部分地区形成飞来峰和构造窗。基于逆冲推覆构造与储层关系,以岩石地层的几何参数和密度为约束,建立初始模型。

Best-fitted Bouguer gravity profile and deep geological cross-section across northern Qiangtang Basin by joint inversion of the seismic reflection and gravity anomaly.A large number of thrust structures were developed in the Early Cenozoic in the basin(see the base diagram of the cover),which resulted in the thrusting of Jurassic marine sedimentary limestone,dolomite,marl,mudstone,shale and siltstone over the Upper Cretaceous and Paleogene continental sedimentary red beds,with nappes and structural windows formed in many areas.The initial model was constructed on the relationship between the thrust structure and the reservoir,which was further constrained by geometric parameter and density of strata and rocks.