天然气地球科学 ›› 2010, Vol. 21 ›› Issue (6): 909–916.doi: 10.11764/j.issn.1672-1926.2010.06.909

• 天然气地质学 • 上一篇    下一篇

准噶尔盆地西北缘火山岩储层特征及成岩演化特征

李伟, 何生, 谭开俊, 张帆, 赵应成, 尹路   

  1. 1.中国地质大学,湖北 武汉 430074;2.中原石油勘探局钻采处,河南 濮阳 457001;
    3.中国石油勘探开发研究院西北分院,甘肃  兰州 730020;
    4.西南石油大学,四川 成都 610059
  • 收稿日期:2010-01-20 修回日期:2010-05-13 出版日期:2010-12-10 发布日期:2010-12-10
  • 通讯作者: 李伟tankj@petrochina.com.cn E-mail:tankj@petrochina.com.cn
  • 作者简介:李伟(1962-),男,江西抚州人,高级工程师,在读博士,主要从事石油勘探开发研究.
  • 基金资助:

    国家重点基础研究发展计划(“973”)项目“非均质储层预测方法”(编号:2007CB209604)资助.

Characteristics of Reservoir and Diagenetic Evolution of Volcanic Rocks in Northwestern Junggar Basin

LI Wei, HE Sheng, TAN Kai-Jun, ZHANG Fan, ZHAO Ying-Cheng, YIN Lu   

  1. 1.China University of Geosciences,Wuhan 430074,China;
    2.Oil Drilling Division of Zhongyuan Petroleum Exploration Bureau,Puyang 457001,China;
    3.Northwest Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Lanzhou 730020,China;
    4.Resource and Environment Faculty,Southwest Petroleum University,Chengdu 610059,China
  • Received:2010-01-20 Revised:2010-05-13 Online:2010-12-10 Published:2010-12-10

摘要:

通过大量的岩心观察,结合室内岩石薄片、铸体薄片、扫描电镜及X-射线衍射等手段,对准噶尔盆地西北缘火山岩储层的岩石学、孔隙特征、物性特征、成岩作用、成岩阶段划分以及成岩演化历史进行了研究。认为火山岩以基性、中—酸性为主,储集空间多样:6种原生孔、3种原生缝以及7种次生孔和3种次生缝,孔隙结构普遍具有分选较差、孔喉半径较小的特征,物性较差。火山岩储层经历了3个成岩演化阶段:同生成岩阶段、表生成岩阶段和埋藏成岩阶段,且发育早期的熔结作用、冷凝收缩作用和晚期的构造作用、风化淋滤作用、溶蚀作用、沸石化作用以及绿泥石化作用等多种成岩作用。在不同成岩演化阶段,储集空间的形成具有差异性:在同生成岩阶段,形成了原生孔和冷凝收缩缝;在表生成岩阶段,形成了部分次生孔隙和风化缝,次生孔隙被充填;在埋藏成岩阶段,形成了大量的次生孔隙、构造缝和溶蚀缝。

关键词: 准噶尔盆地, 火山岩, 储层特征, 成岩作用, 成岩阶段

Abstract:

We studied the lithology,pore characteristics,physical properties,diagenesis,diagenetic stage division and diagenetic evolution history of the volcanic rock reservoir in northwestern Junggar basin by extensive drilling core observation,combining with laboratory analysis (including ordinary thin sections,cast thin sections,scanning electron microscopy,X-ray diffraction and so on).The basic volcanic rocks and acidic volcanics dominated in volcanic rocks.The diverse reservoir interspace included six kinds of primary pore,three kinds of primary fracture,seven kinds of secondary pore and three kinds of secondary fracture,and the pores with poor physical properties were charactered with poor sorting and narrow pore throat radius.The volcanic reservoir had experienced three stages of syndiagenetic stage,epidiagenetic stage and buried diagenetic stage,and a variety of diagenesis including the early diagenesis of welding and condensing contraction,and the late diagenesis of tectonic,weathering and leaching,dissolution,zeolitization,chloritization.Different types of reservoir space were formed in different diagenetic evolution stages.There formed the primary pores and condensation contraction fractures in syndiagenetic stage,some filled secondary pores and weathering sutures in epidiagenetic stage,secondary pores,structural fractures and dissolved fractures in the burial diagenetic stage.

Key words: Junggar basin, Volcanic rocks, Reservoir characteristics, Diagenesis, Diagenetic stage.

中图分类号: 

  • TE122.22+22

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