岩性油气藏 ›› 2021, Vol. 33 ›› Issue (5): 81–94.doi: 10.12108/yxyqc.20210508

• 油气地质 • 上一篇    下一篇

塔里木盆地顺北地区柯坪塔格组沉积演化及沉积分异模式

王素英1, 张翔1,2, 田景春1,2, 彭明鸿1, 郑潇宇1, 夏永涛3   

  1. 1. 成都理工大学 沉积地质研究院, 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, 成都 610059;
    3. 中国石化西北油田分公司 勘探开发研究院, 乌鲁木齐 830011
  • 收稿日期:2020-12-14 修回日期:2021-04-08 出版日期:2021-10-01 发布日期:2021-09-30
  • 通讯作者: 张翔(1978-),男,博士,副教授,主要从事沉积学、沉积地球化学方面的教学科研工作。Email:zhangxiang06@cdut.edu.cn。 E-mail:zhangxiang06@cdut.edu.cn
  • 作者简介:王素英(1992-),女,成都理工大学在读硕士研究生,研究方向为沉积学。地址:(610059)四川省成都市成华区二仙桥东三路1号成都理工大学。Email:2038542775@qq.com
  • 基金资助:
    中国石油化工股份有限公司科技开发项目“塔中—顺北地区志留系圈闭发育模式与有利目标评价”（编号：ky-2019-s-035）和中国石油化工股份有限公司科技开发项目“塔里木盆地奥陶纪—志留纪沉积体系及岩相古地理研究”（编号：33550007-19-ZC0613-0076）联合资助

Sedimentary evolution and sedimentary differentiation model of Kepingtage Formation in Shunbei area,Tarim Basin

WANG Suying1, ZHANG Xiang1,2, TIAN Jingchun1,2, PENG Minghong1, ZHENG Xiaoyu1, XIA Yongtao3   

  1. 1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;
    3. Research Institute of Exploration and Development, Sinopec Northwest Oilfield Company, Urumqi 830011, China
  • Received:2020-12-14 Revised:2021-04-08 Online:2021-10-01 Published:2021-09-30

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摘要： 为研究塔里木盆地顺北地区柯坪塔格组潮坪-陆棚沉积体系在不同阶段沉积格局存在的显著差异，利用普通薄片鉴定、岩心观察与详细描述、地震、测井、单井等资料，在井下地层岩性段的划分对比研究基础上进行综合分析。结果表明：①顺北地区柯坪塔格组受古隆起控制，发育"三段式"（底砂岩段、泥岩段与砂岩段均发育）和"一段式"（缺失底砂岩段、泥岩段或泥岩段中下部）2类地层结构。②顺北地区柯坪塔格组发育海侵背景下受古隆起控制的潮坪-陆棚沉积体系。在早、晚沉积期沉积格局存在显著差异，早期受古隆起控制，沉积相带具有东西向分异特征，且沿古隆起呈环带状展布；晚期古隆起被淹没，不再控制沉积相带的展布，受盆地边界影响，沉积格局由前期的东西分异演化为南北分异，沉积相带整体具有东西延伸、南北分带，并沿陆棚沉积区向南北两侧呈对称展布的特征。③柯坪塔格组经历了水体"浅-深-浅-深-浅"的海平面升降演化过程，垂向上发育多套储盖组合，潮下砂坪与潮间-潮下潮汐水道为有利的储集砂体。该研究成果将为海相碎屑岩油气勘探提供有利目标区和勘探方向。

关键词: 沉积演化, 沉积分异模式, 岩性圈闭, 志留系, 柯坪塔格组, 塔里木盆地

Abstract: In order to study the significant differences of sedimentary patterns in different stages in tidal flat-shelf sedimentary system of Kepingtage Formation in Shunbei area of Tarim Basin, by using common section identification, core observation and description, the data of seismic, well logging and single well, a comprehensive analysis was carried out on the basis of the division and comparison of lithologic sections. The results show that:(1) The Kepingtage Formation in Shunbei area is controlled by palaeo-uplift, and there are two types of stratigraphic structures: "three-section" (lower sandstone interval, mudstone interval and sandstone interval are all developed) and "one-section" (lack of lower sandstone interval, mudstone interval or middle and lower part of mudstone interval).(2) Tidal flat-shelf depositional system controlled by palaeo-uplift in the background of transgression is developed in Kepingtage Formation in Shunbei area. The depositional pattern is significantly different in the early and late depositional periods. In the early stage, it was controlled by palaeo-uplift, and the sedimentary facies zones were differentiated in the east-west direction and distributed in a ring along the palaeo-uplift. In the late stage, the paleo-uplift was submerged and no longer controlled the distribution of sedimentary facies zones. Due to the influence of basin boundary, the sedimentary pattern evolved from east-west differentiation to north-south differentiation. The sedimentary facies zones extended from east-west to north-south as a whole, and distributed symmetrically along the continental shelf sedimentary area.(3) Kepingtage Formation has experienced the water by the "shallow-deep, shallow and deep-shallow" evolution of sea-level change, several sets of reservoir-cap assemblages are developed vertically, and subtidal sand flat and tidal-subtidal tidal channel are favorable reservoir sand bodies. The research results can provide favorable target area and exploration direction for oil and gas exploration of marine clastic rocks.

Key words: sedimentary evolution, sedimentary differentiation model, lithologic trap, Silurian, Kepingtage Formation, Tarim Basin

中图分类号: 

  • TE122.1
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