欢迎访问现代地质!

现代地质 ›› 2025, Vol. 39 ›› Issue (02): 327-350.DOI: 10.19657/j.geoscience.1000-8527.2025.011

• 地层、古生物与古环境 • 上一篇    下一篇

准噶尔盆地东南缘井井子沟组物源分析及构造-沉积学意义

魏超凡1(), 张志杰2(), 万力2, 成大伟2, 李顺利1, 孙洪伟1   

  1. 1.中国地质大学(北京)能源学院,北京 100083
    2.中国石油勘探开发研究院,北京 100083
  • 出版日期:2025-04-10 发布日期:2025-05-08
  • 通信作者: 张志杰,女,博士,高级工程师,1977年出生,主要从事石油地质学和沉积学研究工作。Email: zhzhijie@petrochina.com.cn
  • 作者简介:魏超凡,男,硕士研究生,2000年出生,资源与环境(地质工程)专业,主要从事沉积学研究工作。Email: cugbwcf@163.com
  • 基金资助:
    国家自然科学基金面上项目(42272124)

Provenance Analysis and Sedimentary Facies Distribution of Jingjingzigou Formation in the Southeastern Margin of the Junggar Basin

WEI Chaofan1(), ZHANG Zhijie2(), WAN Li2, CHENG Dawei2, LI Shunli1, SUN Hongwei1   

  1. 1. School of Energy Resources, China University of Geoscience (Beijing), Beijing 100083, China
    2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Published:2025-04-10 Online:2025-05-08

摘要: 准噶尔盆地东南缘下二叠统井井子沟组作为重要的油气储层,其沉积特征和复杂的物源体系一直是该地区研究的重点与难点。本文以准噶尔盆地东南缘四工河、井井子沟、红雁池剖面及艾维尔沟剖面出露的井井子沟组为研究对象,野外露头剖面的精细描述、沉积相解释,综合运用重矿物组合、ZTR指数、重矿物Q型聚类分析、锆石U-Pb年代学数据等物源示踪技术,对研究区井井子沟组物源体系和沉积特征展开研究。结果表明:准噶尔盆地博格达峰以东地区井井子沟组沉积时期以东博格达山为主要物源,以北三台凸起为次要物源,在低幅度宽缓的古地貌背景下发育远源辫状河缓坡沉积;博格达峰地区存在局部凸起,为主要物源,发育近源辫状河沉积及浊流沉积;艾维尔沟剖面以依林黑比尔根山为主要物源,在构造抬升影响下发育近源扇三角洲。通过将物源体系与沉积体系研究相结合,明确了准噶尔盆地东南缘井井子沟组存在东西双向物源体系特征,细化了该地区沉积展布规律,建立了准噶尔盆地东南缘早二叠世构造-沉积模式,为该地区油气勘探提供理论依据。

关键词: 准噶尔盆地东南缘, 井井子沟组, 物源分析, 沉积特征, 沉积相

Abstract:

The Lower Permian Jingjingzigou Formation, a significant oil and gas reservoir in the southeastern margin of the Junggar Basin, has been a key research focus due to its complex sedimentary characteristics and provenance system. This study investigates the Jingjingzigou Formation exposed in the Sigonghe, Jingjingzigou, Hongyanchi, and Aiweiergou sections of the southeastern Junggar Basin. Detailed field descriptions and sedimentary facies interpretations, combined with provenance tracing techniques including heavy mineral associations, the ZTR index, Q-type cluster analysis of heavy minerals, and zircon U-Pb dating, were employed to investigate the provenance system and sedimentary characteristics of the formation in the study area. The results indicate that during the sedimentary period of the Jingjingzigou Formation in the eastern Bogda Peak area, East Bogda Mountain served as the primary provenance, with the Beisantai Uplift as the secondary source. In this region, low-relief, broad paleogeomorphic settings favored the development of distal braided river slope deposits. The Bogda Peak area, characterized by local uplifts, exhibited a primary provenance and developed proximal braided river and turbidite deposits. The Aiweiergou section was primarily sourced from Yilinheibiergen Mountain and was marked by the development of a proximal fan delta under the influence of tectonic uplift. By integrating the provenance and sedimentary system studies, this research clarifies the presence of a bidirectional (east-west) provenance system in the Jingjingzigou Formation along the southeastern margin of the Junggar Basin. This study refines the understanding of the sedimentary distribution patterns and successfully established a comprehensive tectonic-sedimentary model for this region during the Early Permian, providing a theoretical basis for oil and gas exploration in the region.

Key words: southeastern margin of Junggar Basin, Jingjingzigou Formation, provenance analysis, sedimentary characteristics, sedimentary facies

中图分类号: