塔河东南部三叠系中统阿克库勒组沉积相研究  

Sedimentary facies of Akekule Formation of the Middle of Triassic in the southeast of Tahe

作　　者：张涵冰[1] 彭军[1] 燕宇飞[1] 李斌[1] 唐丹[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500

出　　处：《油气地球物理》2013年第3期27-32,共6页Petroleum Geophysics

摘　　要：在详细观察描述岩心的基础上,结合区域地质背景、测井资料、地震剖面资料,划分了取心井段的沉积微相,进而开展了单井的沉积微相研究,认为研究区阿克库勒组为辫状河三角洲—湖泊沉积体系,主要发育辫状河三角洲相、湖泊相和湖底扇相,可进一步划分为6个亚相和多个微相。研究认为,阿1时期发育辫状河三角洲平原与前缘亚相沉积,阿3时期北部地区主要发育辫状河三角洲前缘亚相,中部地区主要发育湖底扇内扇与浅湖沉积,南部地区主要发育湖底扇中扇沉积。提出了研究区发育的辫状河—辫状河三角洲—湖泊组合以及辫状河—辫状河三角洲—湖泊—湖底扇组合两种沉积模式。The sedimentary microfacies of coring interval are divided and the sedimentary microfacies of the single well is studied based on the detailed observations and descriptions of core and combined with regional geological setting, logging information and seismic section. The result shows that the Akekule Formation is braid river delta-lacustrine deposit system, which mainly developed braid river delta facies, lacustrine facies, sublacustrine fan facies, and can be further divided into six subfacies as well as several microfacies. The braid river delta plain and front subfacies deposition was developed in the depositional stage of Member 1 of Akekule Formation, and the front subfaceies of the braid river delta developed mainly in the depositional stage of Member 3 of Akekule Formation in the north, the inner fan of sublacustrine fan and shallow lake sediments in the center and the middle fan of sublacustrine fan in the south. This paper proposes that there are two depositional models in the study area, one is the braid river-braid fiver delta-lake depositional model; the other is the braid river-braid river delta-lake-sublacustrine fan depositional model.

关 键 词：沉积相 辫状河三角洲相 沉积模式 阿克库勒组 塔河东南部 

分 类 号：TE271[石油与天然气工程—油气井工程]