古地理学报 ›› 2025, Vol. 27 ›› Issue (3): 731-745. doi: 10.7605/gdlxb.2025.062

• 古地理学及矿产资源 • 上一篇    下一篇

河西走廊叠合盆地砂岩储集层成岩演化及控储因素: 以雅布赖盆地侏罗系新河组为例*

冯双奇1(), 季汉成1(), 陈亮2, 蒋雪桂3, 向鹏飞4, 史燕青1, 刘颖5, 李玲5   

  1. 1 中国石油大学(北京)地球科学学院,北京 102249
    2 中国石油大学(北京)理学院,北京 102249
    3 中国石化西北油田分公司,新疆乌鲁木齐 830011
    4 中国石化新星(北京)新能源研究院有限公司,北京 100083
    5 中国石油华北油田公司勘探开发研究院,河北任丘 062552
  • 收稿日期:2024-12-11 修回日期:2025-01-19 出版日期:2025-06-01 发布日期:2025-05-29
  • 通讯作者: 季汉成,男,1966年生,中国石油大学(北京)教授,博士生导师,主要从事沉积学、储层地质学等研究。E-mail: jhch@cup.edu.cn。
  • 作者简介:

    冯双奇,男,1994年生,中国石油大学(北京)博士研究生,主要从事储层地质学研究。E-mail:

  • 基金资助:
    *国家重点研发计划项目(2019YFB1504101); 中国石油科技创新基金(2021D002-0102); 中国石油大学(北京)科研启动基金(2462023BJR011)

Diagenetic evolutions and controlling factors on sandstone reservoir in superimposed basin,Hexi Corridor: insights from the Jurassic Xinhe Formation of Yabrai Basin

FENG Shuangqi1(), JI Hancheng1(), CHEN Liang2, JIANG Xuegui3, XIANG Pengfei4, SHI Yanqing1, LIU Ying5, LI Ling5   

  1. 1 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China
    2 College of Science,China University of Petroleum(Beijing),Beijing 102249,China
    3 Northwest Oilfield Company,Sinopec, Urümqi 830011,China
    4 New Energy Research Institute of Sinopec Star Co.,LTD,Beijing 100083,China
    5 Exploration and Development Research Institute,PetroChina Huabei Oilfield Company,Hebei Renqiu 062552,China
  • Received:2024-12-11 Revised:2025-01-19 Online:2025-06-01 Published:2025-05-29
  • Contact: JI Hancheng,born in 1966,is a professor and Ph.D. supervisor at China University of Petroleum(Beijing). He is mainly engaged in sedimentology,reservoir geology. E-mail: jhch@cup.edu.cn.
  • About author:

    FENG Shuangqi,born in 1994,is a Ph.D. candidate of China University of Petroleum(Beijing). He is mainly engaged in reservoir geology. E-mail: .

  • Supported by:
    Co-funded by State's Key Project of Research and Development Plan(2019YFB1504101); Science and Technology Innovation Foundation of China Petroleum(2021D002-0102); Science Foundation of China University of Petroleum(Beijing)(2462023BJR011)

摘要: 河西走廊地区中生代叠合盆地构造演化复杂,沉积体系多变,地层经历了多期埋藏和构造抬升,储集层成岩蚀变多样、非均质性强,因此研究储集层成岩演化特征及相关的沉积—成岩控储作用对油气勘探至关重要。综合岩心观察描述、岩石薄片鉴定和电子扫描显微镜观察、地球化学测试等分析手段,明确了雅布赖盆地中侏罗统新河组下段的储集层成岩特征以及成岩演化序列,深入分析了沉积—成岩对储集层质量的控制。研究表明: 目的层主要发育辫状河三角洲前缘和重力流沉积,以长石砂岩和岩屑长石砂岩为主。相带、埋藏成岩作用及构造抬升相关的溶蚀改造的时空特征,共同决定了储集层的孔隙空间类型及物性差异。具体而言,中厚层辫状河三角洲前缘水下分流河道砂体经历了显著的溶蚀作用,但溶蚀孔隙内次生成岩矿物较少,孔隙连通性好,普遍为低孔中渗储集层; 中—薄层河口坝和半深湖—深湖重力流水道砂体具有较高的长石、岩屑含量以及较多的泥质塑性杂基,溶蚀孔内充填大量钠长石/硅质胶结物和黏土矿物,导致该类型储集层普遍具有低孔低渗的特点。

关键词: 叠合盆地, 沉积相带, 储集层, 主控因素, 雅布赖盆地, 河西走廊

Abstract:

The Mesozoic superimposed basin in the Hexi Corridor is characterized by complex tectonic evolutions and variable sedimentary systems. The stratigraphy of these hydrocarbon-bearing basins has undergone multiple phases of burial and tectonic uplift,and hydrocarbon reservoirs exhibit diverse diagenetic alterations and strong heterogeneity. Therefore,the study of reservoir diagenetic characteristics and the associated sedimentary and diagenetic controls is essential for the successful exploration of oil and gas fields. This study focuses on the diagenetic mineralogical characteristics and evolution of the Middle Jurassic Lower Xinhe Formation,based on a range of analytical techniques,including optical microscopy,scanning electron microscopy,and geochemical tests. Moreover,the impacts of sedimentary and diagenetic characteristics on reservoir quality are investigated. The study demonstrates that the target layers are characterized by braided delta front and gravity flow deposit,which are dominated by arkoses and lithic arkoses. The variations in pore space types and physical properties of sandstone reservoirs are determined by the combined influence of microfacies,burial diagenetic alterations and uplift-related dissolution. In detail,the medium- to thick-bedded sandstones of subaqueous distributary channel facies at the delta front are characterized by strong dissolution modification and limited secondary authentic precipitations. These reservoirs typically exhibit low porosity and medium permeability. The medium-to thin-bedded sandstones of gravity flow channel and mouth bar facies are characterized by a considerable quantity of detrital feldspar and fragments,as well as high content of ductile clay-rich matrix. Furthermore,the dissolution pores are filled by abundant authigenic albite,silica cements and clay minerals. Consequently,the sandstones exhibit tight reservoir characteristics,with low porosity and low permeability.

Key words: superimposed basin, sedimentary facies, reservoirs, controlling factors, Yabrai Basin, Hexi Corridor

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