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资源勘探

新疆塔北隆起牙哈—英买力地区寒武系沉积相特征及演化

  • 黄阳鸿 ,
  • 王振宇 ,
  • 杨海军 ,
  • 马青
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  • 1.西南石油大学地球科学与技术学院 四川成都 610500;
    2.中国石油塔里木油田公司勘探开发研究院 新疆库尔勒 841000
黄阳鸿,男,1997年生,硕士;从事碳酸盐岩沉积储层研究工作。地址:(610500)四川省成都市新都区新都大道8号西南石油大学。E-mail:2359597034@qq.com

修回日期: 2024-03-05

  网络出版日期: 2024-04-28

Characteristics and evolution of Cambrian sedimentary facies in Yaha-Yingmaili area of Tabei uplift, Tarim Basin

  • HUANG Yanghong ,
  • WANG Zhenyu ,
  • YANG Haijun ,
  • MA Qing
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  • 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Exploration and Development Research Institution, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China

Revised date: 2024-03-05

  Online published: 2024-04-28

摘要

新疆塔北隆起牙哈—英买力地区海相碳酸盐岩是塔北隆起下古生界重要的油气储集层,厘清该区寒武系沉积演化过程和相带分布可为进一步勘探开发提供更加可靠的地质依据。在对岩心、薄片观察描述的基础上,结合测井资料和野外剖面特征分析,对牙哈—英买力地区寒武系沉积相特征及沉积模式进行研究,研究结果表明:①塔北隆起牙哈—英买力地区寒武纪处于塔北大型碳酸盐岩台地内部,主要发育局限台地、半局限台地2种台地相。②局限台地主要发育于上、中寒武统,包含潮坪、潟湖、障壁滩坝3种亚相,其中可见有冲刷面、层状层理等构造,剖面中GR曲线跳跃剧烈,呈锯齿状,视电阻率整体偏高。③半局限台地在上、中、下寒武统均有分布,主要包括台内滩、滩间海2种亚相,宏观上可见水平层理、韵律层理,剖面中GR曲线总体较平直,呈箱型,视电阻率整体偏低。④沉积演化特点上,从早寒武世—晚寒武世,其沉积环境在纵向上呈现为:局限台地—半局限台地,随着海平面升降的变化,出现开阔—闭塞—开阔—闭塞的环境变化。

本文引用格式

黄阳鸿 , 王振宇 , 杨海军 , 马青 . 新疆塔北隆起牙哈—英买力地区寒武系沉积相特征及演化[J]. 天然气勘探与开发, 2024 , 47(2) : 11 -23 . DOI: 10.12055/gaskk.issn.1673-3177.2024.02.002

Abstract

Marine carbonate rocks are the important Lower Paleozoic hydrocarbon reservoirs in the Yaha-Yingmaili area of Tabei uplift of Tarim Basin. Clarifying the Cambrian sedimentary evolution and facies distribution in this area can provide a reliable geological basis for further exploration and development. The Cambrian sedimentary facies characteristics and sedimentary models of the Yaha-Yingmaili area were investigated, based on the observation and description on cores and thin sections, combined with logging data and field profile analysis. The results are as follows: (i) Located inside the Tabei large-scale carbonate platform, the Cambrian system in the Yaha-Yingmaili area developed two types of platform facies: restricted platform, and semi-restricted platform. (ii) The restricted platform, developed mainly in the Upper and Middle Cambrian, includes three subfacies (tidal flat, lagoon, and barrier beach bar), with structures such as scour surface and stratified bedding. In the profile, there presents serrated GR logging curves, and an overall high apparent resistivity. (iii) The semi-restricted platform, distributed in the Upper, Middle and Lower Cambrian, includes two subfacies (intra-platform beach and inter-beach sea), with horizontal bedding and rhythmic bedding observed. In the profile, there presents box-shaped GR logging curves, and an overall low apparent resistivity. (iv) In terms of sedimentary evolution characteristics, the sedimentary environment in the Early-Late Cambrian transitioned vertically from the restricted platform to the semi-restricted platform. With fluctuations in sea level, there were alternating periods of open and closed environments.
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