塔里木盆地巴楚–麦盖提地区寒武纪沉积序列与古地理演化  

The Cambrian sedimentary sequences and paleogeographic evolution in the Bachu-Maigaiti area,southwestern Tarim Basin.

作　　者：耿锋 苏炳睿 郝建龙 范伟峰 段雄 GENG Feng;SU Bingrui;HAO Jianlong;FAN Weifeng;DUAN Xiong(Exploration and Development Research Institute,Northwest Oilfield Company,SINOPEC,Urumqi 830011,China;School of Geographical Sciences,China West Normal University,Nanchong 637002,China)

机构地区：[1]中石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011 [2]西华师范大学地理科学学院,四川南充637002

出　　处：《沉积与特提斯地质》2023年第4期856-870,共15页Sedimentary Geology and Tethyan Geology

基　　金：西华师范大学博士科研启动基金项目(20E31,20E32);中石化西北油田分公司项目(KY2020-S-031)。

摘　　要：塔里木盆地巴楚–麦盖提地区(巴麦地区)是重要的含油气地区。基于最新的钻井和地震资料,本文将该地区寒武系划分为13个三级层序,同时,总结了三级层序界面及层序内部特征,对层序格架下的沉积序列及各时期的岩相古地理进行了精细刻画,并且提出,巴麦地区经历了从碳酸盐缓坡到镶边碳酸盐台地的演化过程。通过对巴楚隆起上的钻井、测井资料和地震相应特征的研究,对缺乏钻井等实物资料的麦盖提斜坡地区沉积环境进行了合理的推测,最终以组为单位编制了岩相古地理图。研究结果显示,塔里木盆地巴楚–麦盖提地区在寒武纪的沉积演化中(SQ1-SQ13)经历了两次大规模海侵,形成寒武系盐下良好的生储盖组合,其中,麦盖提地区是塔里木盆地西南部寒武系勘探领域形成大型油气藏的最有利区带,具有良好的勘探前景。The Bachu-Maigaiti area in the Tarim Basin is an important oil-gas-bearing area.Based on the latest drilling and seismic data,this paper divides the Cambrian into 13 third-order sequences in the Bachu-Maigaiti area of the Tarim Basin.Detailed descriptions of the sedimentary sequences and lithofacies and paleogeography of each period were provided.It was proposed that the Bachu-Maigaiti area experienced an evolution process from a carbonate gentle slope to a rimmed carbonate platform.Through the study of up-drilling,logging data,and seismic characteristics of the Bachu uplift,the sedimentary environment of the Maigaiti slope,which lacks physical data such as drilling,was reasonably speculated,and finally the lithofacies paleogeographic map was compiled in units of groups.The results show that the Bachu-Maigaiti area in the Tarim Basin experienced two large-scale transgressions during the Cambrian sedimentary evolution(SQ1-SQ13),forming a good source-reservoir-cap assemblage in the Cambrian subsalt.In this context,the Maigaiti slope is the most favorable area for the formation of large oil and gas reservoirs in the Cambrian exploration area in the southwest of the Tarim Basin,and has good exploration prospects.

关 键 词：巴楚–麦盖提地区 寒武纪 沉积序列 三级层序 古地理 

分 类 号：P618.13[天文地球—矿床学]