天然气地球科学

• 天然气地质学 • 上一篇    下一篇

准噶尔盆地玛湖凹陷下乌尔禾组储层特征及其控制因素

付爽1,2,3,庞雷4,许学龙5,曹元婷4,刘振宇4,张顺存1,2   

  1. 1.中国科学院西北生态环境资源研究院,甘肃 兰州 730000;
    2.甘肃省油气资源重点实验室/中国科学院油气资源研究重点实验室,甘肃 兰州 730000;
    3.中国科学院大学,北京 100049;
    4.中国石油新疆油田分公司勘探开发研究院,新疆 克拉玛依 834000;
    5.中国石油新疆油田分公司准东采油厂,新疆 阜康 831511
  • 收稿日期:2018-08-11 修回日期:2019-01-22 出版日期:2019-04-10
  • 通讯作者: 张顺存(1973-),男,甘肃定西人,副研究员,主要从事储层地质学与储层地球化学研究. E-mail:zhangshuncun@126.com.
  • 作者简介:付爽(1994-),男,湖北天门人,硕士研究生,主要从事储层地质研究. E-mail:1148313709@qq.com.
  • 基金资助:
    国家自然科学基金面上项目“富火山岩岩屑砂砾岩储层中沸石类自生矿物的形成条件和溶蚀机理及其对储层物性的影响”(编号:41872145);中国科学院西北生态环境资源研究院青年人才成长基金项目“准噶尔盆地东部石炭系火山岩储层溶蚀机理”(编号:Y644JJ1ZSY)联合资助.

The characteristics and their controlling factors on reservoir in Permian Lower Urho Formation in Mahu Sag,Junggar Basin

Fu Shuang1,2,3,Pang Lei4,Xu Xue-long5,Cao Yuan-ting4,Liu Zhen-yu4,Zhang Shun-cun1,2   

  1. 1.Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China; 
    2.Key Laboratory of Petroleum Resource of Gansu Province/Key Laboratory of Petroleum Resource Research of CAS,Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China;
    3.University of Chinese Academy of Sciences,Beijing 100049,Chiuna;
    4.Institute of Exploration and Development of Xinjiang Oil Field Company,PetroChina,Karamay 843000,China;
    5.Zhudong Oil Production Plant,Xinjiang Oil Field Company Ltd.,PetroChina,Fukang 831511,China
  • Received:2018-08-11 Revised:2019-01-22 Online:2019-04-10

摘要: 准噶尔盆地玛湖凹陷勘探潜力巨大,二叠系下乌尔禾组是玛湖凹陷下一步油气勘探的重要层位,具有良好的油气勘探前景。为给下一步的勘探提供参考借鉴,通过岩性观察、压汞分析、铸体薄片、扫描电镜、CT扫描及数理统计等实验和方法,探讨下乌尔禾组储层的特征及控制因素。结果表明:下乌尔禾组储层岩石类型多样,火山碎屑物质含量高而成熟度低,属于特低孔特低渗储层;孔隙类型多样,以剩余粒间孔、微裂缝、粒内溶孔为主,孔隙喉道较细,非均质性强。影响储层物性的因素为沉积作用、成岩作用和构造作用。沉积作用对储层控制作用明显,物性较好的储层主要发育在水动力较强的(水上)水下分流河道、泥质含量较少的砂体中。压实作用是主要的破坏性成岩作用,造成70%左右的原生孔隙丧失;而胶结作用是次要因素;溶蚀作用是建设性的成岩作用,溶蚀作用生成的次生孔隙改善了储层物性,次生孔隙发育带主要发育在(水上)水下分流河道等相带中。构造作用产生的微裂缝使储层非均质性增强,也改善了储层物性。

关键词: 储层特征, 控制因素, 下乌尔禾组, 玛湖凹陷, 准噶尔盆地

Abstract: The Permian Lower Uhro Formation is an important strata for petroleum exploration and shows good prospects in Mahu Sag,which is the highest degree in accumulation of petroleum in Juggar Basin.In order to support and offer reference for further exploration and exploitation,based on core observation,thin section,scanning electron microscopy (SEM),mercury injection experiment,CT scanning,as well as mathematics statistics,the characteristics and controlling factors of Lower Urho Formation have been discussed.The results indicate that the reservoir of Lower Urho Formation has especially low porosity and low permeability with multiple types of rocks,which have a high content of volcanic materials and low maturity.The variety of pores with thin throats are dominated by residual intergranular pores,microcracks,intragranular dissolved pores,and reservoir heterogeneity is strong.Influencing factors on physical properties of reservoirs are sedimentation,diagenesis and tectonism.Sedimentation plays a significant role in reservoir controlling factors,and reservoirs with good physical properties are mainly developed in under-water distributary channel and upper-water distributary channel with strong hydrodynamics and less argillaceous content.Compaction is the main destructive diagenesis and cementation is the second.The compaction caused 70% primary pores to disappeare.Dissolution is the constructive diagenesis.Secondary pores formed by dissolution improve physical property,and the secondary pore zone is mainly developed in under-water distributary channel and upper-water distributary channel.Microfractures produced by tectonic activities enhance the heterogeneity of reservoir and improve effectively physical property of reservoir.

Key words: Reservoir characteristics, Controlling factors, Lower Urho Formation, Mahu Sag, Junggar Basin

中图分类号: 

  • TE122.2+3 
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