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ACCUMULATING DIVERSITY AND ITS MECHANISM BETWEEN HANGING AND LOWER WALLS OF FAULT IN SUPERIMPOSED BASIN
Author(s): 
Pages: 297-306
Year: Issue:  3
Journal: CHINESE JOURNAL OF GEOLOGY

Keyword:  叠合盆地断裂上、下盘油气聚集松辽盆地柴达木盆地;
Abstract: 断裂沟通叠合盆地不同层位、不同时代的烃源岩和生储盖组合,成为连接烃源岩和各种圈闭的重要渠道,导致形成了多种类型与断裂有关的油气藏.断裂上、下盘油气聚集差异现象十分普遍.通过剖析松辽盆地、柴达木盆地典型断裂带油气藏成藏条件,认为其根本原因是由于断裂上、下盘具有不同的地质特征和油气运聚成藏条件,它们往往具有互为消长的关系.油气富集在断裂的上盘还是聚集在断裂的下盘,主要取决于:断裂的作用,断距与储、盖层的厚度关系,断裂倾角,区域盖层之下断裂断开烃源岩或油气层的层数,断裂形成或活动时期与主力烃源岩排烃高峰时期的关系等8个主要因素.
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