石油学报 ›› 2013, Vol. 34 ›› Issue (4): 667-674.DOI: 10.7623/syxb201304006

• 地质勘探 • 上一篇    下一篇

松辽盆地南部英台断陷营城组火山岩晶间微孔特征及储层效应

高有峰1, 吴艳辉2,3, 刘万洙2, 瞿雪姣2, 唐华风2   

  1. 1. 吉林大学古生物学与地层学研究中心 吉林 长春 130026;
    2. 吉林大学地球科学学院 吉林 长春 130061;
    3. 吉林省安全科学技术研究院 吉林 长春 130051
  • 收稿日期:2013-02-12 修回日期:2013-05-07 出版日期:2013-07-25 发布日期:2013-07-04
  • 通讯作者: 唐华风,男,1979年6月生,2001年获吉林大学学士学位,2007年获吉林大学博士学位,现为吉林大学副教授,主要从事火山岩储层地质、地球物理研究。Email:tanghfhc@jlu.edu.cn
  • 作者简介:高有峰,男,1982年6月生,2004年获吉林大学学士学位,2010年获吉林大学博士学位,现为吉林大学讲师,主要从事火山岩储层成岩作用和地层对比研究。Email:gaoyoufeng@jlu.edu.cn
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2012CB822002和2009CB219305)和国家自然科学基金项目(No.41002038)资助。

Intercrystalline micropore characteristics and reservoir effect of Yingcheng Formation volcanic rock in Yingtai fault depression, southern Songliao Basin

GAO Youfeng1, WU Yanhui2,3, LIU Wanzhu2, QU Xuejiao2, TANG Huafeng2   

  1. 1. Research Center of Palaeontology & Stratigraphy, Jilin University, Changchun 130026, China;
    2. College of Earth Sciences, Jilin University, Changchun 130061, China;
    3. Jilin Academy of Safety Science & Technology, Changchun 130051, China
  • Received:2013-02-12 Revised:2013-05-07 Online:2013-07-25 Published:2013-07-04

摘要:

松辽盆地南部英台断陷营城组火山岩中普遍发育晶间微孔隙,主要由重结晶作用和溶蚀作用形成。按成因和骨架颗粒的种类可将晶间微孔分为放射状碱性长石晶间微孔、黏土矿物晶间微孔和混合矿物晶间微孔3种类型。基质发生脱玻化重结晶作用,形成球粒状钾长石的区域晶间微孔面孔率为5.2%,形成黏土矿物和石英长石雏晶的区域面孔率增加9.5% ~13.6%;长石发生局部溶蚀形成伊利石的区域,面孔率可增加6.5% ~10.1%;而伊利石充填火山碎屑岩的粒间孔隙,仍可保留22.3% 的晶间微孔型储集空间。结合英台断陷勘探实例,认为晶间微孔发育的火山岩可作为天然气的有利储层。

关键词: 松辽盆地, 营城组, 火山岩, 晶间微孔, 成岩作用

Abstract:

Volcanic intercrystalline micropores mainly formed by recrystallization and dissolution develop widely in the Yingtai fault depression, southern Songliao Basin. According to the genesis and types of skeleton grains, volcanic intercrystalline micropores can be divided into three types, i.e. intercrystalline micropores of radial alkali feldspar, clay minerals and mixed minerals. Surface porosity analyses showed that due to the devitrification of matrix, the porosity of intercrystalline micropores in the spherulitic K-feldspar region amounts to 5.2%, the porosity of intercrystalline micropores in the region of clay minerals and quartz-feldspar crystallites increases from 9.5% to 13.5%, the porosity of intercrystalline micropores in the region where partial feldspar alters to illite may increase to 6.5% ~10.1%, while intergranular pores of pyroclastic rocks filled with illite can still retain a porosity of 22.3% for intercrystalline micropores. Combined with the exploration practice in the Yingtai fault depression, we suggested that volcanic rocks with rich intercrystalline micropores can serve as a favorable reservoir of natural gas.

Key words: Songliao Basin, Yingcheng Formation, volcanic rock, intercrystalline micropore, diagenesis

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