【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。更多还原

【Abstract】 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 deltalacustrine 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 riverbraid river deltalake depositional model;the other is the braid riverbraid river deltalakesublacustrine fan depositional model.更多还原