塔里木盆地西北缘阿克苏地区震旦系沉积相特征及沉积模式  

Sedimentary facies characteristics and sedimentary patterns of Sinian in Akesu Area on the northwest margin of Tarim Basin

作　　者：邓浩博 田景春[1,2] 张翔[1,2] 孟万斌[1] 苏炳睿[1] 杨培星 曾建强 DENG Haobo;TIAN Jingchun;ZHANG Xiang;MENG Wanbin;SU Bingrui;YANG Peixing;ZENG Jianqiang(School of Sedimentary Geology,Chengdu University of Technology,Chengdu,Sichuan 610059,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,China)

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059

出　　处：《东北石油大学学报》2019年第3期20-32,I0002,共14页Journal of Northeast Petroleum University

基　　金：中国石油化工股份有限公司科技开发项目(P17046-4);中国石油化工股份有限公司科技开发项目(P16089)

摘　　要：根据磷矿沟和什艾日克野外剖面资料观测及薄片分析,结合沉积学理论研究震旦系沉积环境,分析塔里木盆地西北缘阿克苏地区震旦系沉积相特征及沉积模式。结果表明:研究区震旦系可识别无障壁海岸、碎屑有障壁海岸、混积滨岸和碳酸盐缓坡4类沉积相,进一步划分为4个亚相(前滨、碎屑岩潮坪、碳酸盐岩潮坪及浅滩)和11个微相(泥坪、砂坪、云坪、混合坪、潮道、风暴潮道、砂屑滩、藻屑滩、颗粒滩、潮间藻席、潮间藻席及叠层石)。纵向上具有碎屑岩、碎屑岩—碳酸盐岩、碳酸盐岩的沉积演化特征,符合震旦纪由裂谷盆地向坳陷盆地的构造演化规律。在研究区震旦系建立碎屑岩潮坪—混积滨岸—碳酸盐岩缓坡的沉积模式。该结果为研究区古地理重建与震旦系油气勘探提供参考。In order to analyze the characteristics and sedimentary patterns of Sinian sedimentary facies in Akesu Area on the northwest margin of Tarim Basin,Sinian sedimentary environment and evolution rules were studied based on the fine observation data of two field profiles of phosphate mine gulch and shi 'airike and analyzed the sedimentary evolution law.The results show that the non-barrier coast,clastic barrier coast,mixed shoreline and carbonate gentle slope can be identified in Sinian of Akesu Area on the northwest margin of Tarim Basin,and it can be further divided into 4 subphases(foreshore,clastic tidal flat,carbonate tidal flat and shallow beach) and 11 microphases(mud flat,sand flat,dolomitic flat,mixed flat,tidal channel,storm surge channel,sandy beach,algal beach,granular beach,intertidal algae mat,intertidal algae mat and stromatolites).The sedimentary evolution law of clastic rock,clastic rock-carbonate rock,carbonate rock vertically reflects the tectonic evolution of Sinian from rift basin to depression basin.Finally,the sedimentary model of Sinian "clastic tidal flat mixed shoreline carbonate gentle slope" in Akesu Area is established.It provides a reference for paleogeographic reconstruction and Sinian oil and gas exploration in the study area.

关 键 词：塔里木盆地西北缘 阿克苏地区 震旦系 沉积相 沉积演化 沉积模式 

分 类 号：TE122.2[石油与天然气工程—油气勘探]