西南石油大学学报(自然科学版)

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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

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

CLC Number: