新疆博格达山周缘中上二叠统与中上三叠统沉积特征及其主控因素  

Sedimentary characteristics and main controlling factors of the Middle-Upper Permian and Middle-Upper Triassic around Bogda Mountain of Xinjiang,NW China

作　　者：杨有星 张君峰 张金虎 高永进 周新桂 孙相灿 文磊 苗苗青 YANG Youxing;ZHANG Junfeng;ZHANG Jinhu;GAO Yongjin;ZHOU Xingui;SUN Xiangcan;WEN Lei;MIAO Miaoqing(Oil and Gas Survey Center of China Geological Survey,Beijing 100083,China)

机构地区：[1]中国地质调查局油气资源调查中心,北京100083

出　　处：《石油勘探与开发》2022年第4期670-682,共13页Petroleum Exploration and Development

基　　金：中国地质调查局项目“塔里木、准噶尔、柴达木盆地油气战略选区调查”(DD20190106);中国地质调查局项目“新疆塔里木、准噶尔外围油气战略选区调查”(DD20160203);中国地质调查局项目“新疆西部地区油气地质调查”(DD20190090)。

摘　　要：基于野外地质调查、地震资料解释及钻测井资料分析,按照“构造控盆,盆地控相,相控组合”的思路对博格达山周缘地质结构、地层沉积充填序列及沉积演化规律等进行研究。结果表明,博格达山周缘盆地构造演化可以划分为9个阶段,其中,中晚二叠世—中晚三叠世为陆内裂谷、前陆盆地和陆内拗陷盆地演化阶段,主要发育湖泊、扇三角洲和辫状河三角洲3种沉积相类型;早期陆内裂谷、晚二叠世构造低幅隆升及中晚三叠世构造沉降控制了博格达山周缘盆地的形态、类型、沉降速率及可容纳空间,进而影响了沉积体系的类型及演化;中二叠世博格达山地区为深水湖盆的沉降中心和沉积中心,主要以深水沉积作用为主,局部发生重力流沉积;晚二叠世博格达山地区隆升形成低凸起并发育一系列扇三角洲砂体;中晚三叠世博格达低凸起发生沉降,以广泛发育辫状河三角洲沉积为特征。Based on field geological survey,interpretation of seismic data and analysis of drilling and logging data,the evolution of geological structures,stratigraphic sedimentary filling sequence and sedimentary system around the Bogda Mountain were analyzed according to the idea of"structure controlling basin,basin controlling facies and facies controlling assemblages".The tectonic evolution of the basin around the Bogda Mountain can be divided into nine stages.The Middle-Late Permian-Middle-Late Triassic was the development stage of intracontinental rift,foreland basin and inland depression basin when lake,fan delta and braided river delta sedimentary facies developed.Early intracontinental rifting,late Permian tectonic uplift,and middle-late Triassic tectonic subsidence controlled the shape,type,subsidence rate and sedimentary system evolution of the basin.The Bogda Mountain area was the subsidence center and deposition center of the deep water lake basin in the Middle Permian with mainly deep-water deposition and local gravity flow deposition.This area had tectonic inversion in the Late Permian,when the Bogda Mountain uplifted to form a low bulge and a series of fan delta sand bodies.In the Middle-Late Triassic,subsidence occurred in the Bogda low uplift,characterized by extensive development of braided river delta deposits.

关 键 词：准噶尔盆地 博格达山 阜康断裂带 二叠系 芦草沟组 三叠系 沉积充填序列 沉积体系 

分 类 号：TE122.1[石油与天然气工程—油气勘探]