西南石油大学学报(自然科学版)

• 地质勘探 •    下一篇

致密砂岩填隙物特征及其对储层的影响

杨勇1,2 *,黄有根2,冯炎松2,刘斌3,雷卞军4   

  1. 1. 成都理工大学能源学院,四川成都610059
    2. 中国石油长庆油田分公司勘探开发研究院,陕西西安710021
    3. 国投重庆页岩气开发利用有限公司,重庆渝中400043
    4. 西南石油大学地球科学与技术学院,四川成都610500
  • 出版日期:2015-10-01 发布日期:2015-10-01
  • 通讯作者: 杨勇,E-mail:yy4_cq@petrochina.com.cn
  • 基金资助:

    国家科技重大专项(2011ZX05044)。

Characteristics of Interstitial Material in Tight Standstone and Its Effects on Reservoir

Yang Yong1,2*, Huang Yougen2, Feng Yansong2, Liu Bin3, Lei Bianjun4   

  1. 1. College of Energy Resources,Chengdu University of Technology,Chengdu,Sichuan 610059,China
    2. Research Institute of Petroleum Exploration & Development,Changqing Oilfield Company,PetroChina,Xi′ an,Shaanxi 710021,China
    3. SDIC Chongqing Shale Gas Development and Utilization Co,Yuzhong,Chongqing 400043,China
    4. School of Geosciences and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2015-10-01 Published:2015-10-01

摘要:

鄂尔多斯盆地中北部二叠系山1 盒8 段为一套富含同沉积火山物质的致密砂岩,与普通的陆源碎屑岩相
比,其填隙物类型多样、成分复杂、成岩演化程度高。填隙物主要包括同沉积火山灰、黏土矿物、碳酸盐胶结和交代
物、硅质胶结物和少量细云母屑、泥屑、碳屑。针对致密砂岩中填隙物与孔隙演化相关性问题,在储层岩石学特征分析
的基础上,利用铸体薄片、扫描电镜及阴极发光等分析测试手段开展了填隙物的成因、特征、成岩演化等方面的研究。
研究表明,孔隙中充填的同沉积火山灰物质是次生溶孔形成的主要母质,而晚成岩期的铁方解石胶结物使残留的孔隙
再次遭到强烈的破坏,含一定量淀高岭石的储层孔隙相对发育。

关键词: 鄂尔多斯盆地, 二叠系, 致密砂岩, 填隙物, 储层

Abstract:

The Shan1 He8 Member is tight sandstone with many consedimental volcanics in the middle-north of Ordos Basin.
Compared with common clastic rocks,the fillings of tight sandstone are of many types,complicated components,and intensive
diagenetic evolution. The fillings consist of consedimental volcanic ash,clay mineral,carbonate cement and metasome,
siliceous cement,slender glimmer,muddy debris and carbon dust. Based on the research of reservoirs,the relativity of the
fillings and pore evolution was studied by using slices,scanning electron microscopy,cathode luminescence and so on. The
analysis is mainly focused on genesis,character,diagenetic evolution of fillings. Research shows that consedimental volcanic
ash is mother material of secondary dissolved pores;calcite cement strongly damage pore in late-diagenetic period,and certain
amount of kaolinite is favorable for pore growing.

Key words: Ordos Basin, permian, tight sandstone, fillings, reservoir

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