岩性油气藏 ›› 2021, Vol. 33 ›› Issue (5): 45–58.doi: 10.12108/yxyqc.20210505

• 油气地质 • 上一篇    下一篇

吉木萨尔凹陷二叠系芦草沟组层序地层划分及演化特征

张文文, 韩长城, 田继军, 张治恒, 张楠, 李正强   

  1. 新疆大学 地质与矿业工程学院, 乌鲁木齐 830046
  • 收稿日期:2020-08-10 修回日期:2021-01-18 出版日期:2021-10-01 发布日期:2021-09-30
  • 通讯作者: 韩长城(1984-),男,博士,副教授,主要从事石油地质方面的教学与研究工作。Email:517892849@qq.com。 E-mail:517892849@qq.com
  • 作者简介:张文文(1996-),男,新疆大学在读硕士研究生,研究方向为沉积地质与石油地质。地址:(830046)新疆乌鲁木齐市天山区延安路1230号。Email:2537536180@qq.com
  • 基金资助:
    国家自然科学基金项目“新疆北部侏罗纪巨厚煤层的煤岩特征与煤相演替”（编号：41662010）、新疆维吾尔自治区自然科学基金“塔河油田下奥陶统内幕区多源成岩流体特征及成储机理”（编号：2020D01C037）、新疆维吾尔自治区高校科研计划“塔里木盆地深层—超深层碳酸盐岩构造-流体耦合控储机理”（编号：XJEDU2019Y011）联合资助

Sequence stratigraphy division and evolutionary features of Permian Lucaogou Formation in Jimsar Sag

ZHANG Wenwen, HAN Changcheng, TIAN Jijun, ZHANG Zhiheng, ZHANG Nan, LI Zhengqiang   

  1. Geology and Mining Engineering academy, Xinjiang University, Urumqi 830046, China
  • Received:2020-08-10 Revised:2021-01-18 Online:2021-10-01 Published:2021-09-30

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摘要： 为明确吉木萨尔凹陷二叠系芦草沟组层序地层特征及其演化规律，开展了大量的钻井岩心分析、测井分析和地震资料解释，并对其沉积微相展布特征进行了综合研究。结果表明：①吉木萨尔凹陷芦草沟组自下而上可分为SQ1和SQ2等2个三级层序，其中SQ1又分为低位、湖侵、高位体系域，SQ2可分为湖侵、高位体系域，"甜点体"储层形成于高位体系域；②吉木萨尔凹陷芦草沟组为一套三角洲-咸化湖泊沉积体系，可识别出砂坝、前三角洲泥、滩砂、浅湖泥、混合坪、云坪、半深湖泥以及浊流等8种沉积微相；③吉木萨尔凹陷芦草沟组沉积期，持续存在陆源碎屑和碳酸盐岩的混合沉积，早期陆源碎屑三角洲沉积体系更发育，晚期咸化湖泊沉积体系更发育；④气候、物源供给强度和湖平面的周期性升降控制了吉木萨尔凹陷芦草沟组的层序发育和沉积演化。该研究成果对吉木萨尔凹陷二叠系芦草沟组的油气勘探具有指导意义。

关键词: 层序地层, 沉积演化, 沉积微相, 咸化湖, 芦草沟组, 二叠系, 吉木萨尔凹陷

Abstract: To clarify the sequence stratigraphic characteristics and evolution of the Permian Lucaogou Formation in Jimsar Sag, many drillings core analysis, well logging analysis and seismic data interpretation were carried out. The distribution characteristics of the sedimentary microfacies of the Lucaogou Formation were comprehensively studied. The results show that:(1) The Lucaogou Formation of the Jimsar Sag, from bottom to top, can be divided into two third-order sequences(SQ1 and SQ2), and SQ1 can be divided into lowstand(LST), transgressive (TST) and highstand system tracts(HST), SQ2 can be divided into TST, HST. "sweet spots" is formed in HST. (2) The Lucaogou Formation is a set of delta-salined lake sedimentary system, which can be identified 8 sedimentary microfacies(sand dam, pre-delta mud, beach sand, shallow lake mud, mixed flat, dolomitic flat, semideep lake mud and turbidite deposit).(3) During the depositional period of the Lucaogou Formation in Jimsar Sag, mixed deposition of terrigenous clastics and carbonate rocks continued to exist. The terrigenous clastic delta sedimentary system was more developed in the early stage, and the saline lake sedimentary system was more developed in the late stage.(4) Climate, intensity of material supply and periodic rise and fall of the lake level control the stratigraphic development and sedimentary evolution of Lucaogou Formation in Jimsar Sag. The research results have guiding significance for the petroleum exploration of Permian Lucaogou Formation in Jimsar Sag.

Key words: sequence stratigraphy, sedimentary evolution, sedimentary microfacies, saline lake, Lucaogou Formation, Permian, Jimsar Sag

中图分类号: 

  • TE121.3
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