Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (6): 13-17.doi: 10.3969/j.issn.1673-8926.2011.06.003

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Diagenesis and its influence on reservoir properties in Qie 6 well area of Kunbei Oilfield

LI Wen-long1， MU Zhong-hai1， QU Xin-zhong2， TENG Xian-qing2， HUANG Jing1   

  1. 1. Southwest Petroleum University， Chengdu 610500， China； 2. Qinghai Oilfield Company， PetroChina， Dunhuang 736202， China）
  • Online:2011-12-20 Published:2011-12-20

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Abstract:

Based on the analysis of ordinary thin sections, cast thin sections, scanning electron microscope and X-ray diffraction, this paper studied the diagenesis types, evolutionary phase, evolutionary series and influencing factors of reservoir properties of E1+2 and E31 in Qie 6 well area ofKunbei Oilfield. The result shows that the sandstone of E1+2 and E31is in the late stage of middle diagenetic stage A, and the main diagenesis types are compaction, cementation, dissolution, metasomatism and cataclasis. The experienced compaction, quartz secondary enlargement and cementation of calcite and anhydrite are the main destructive factors of reservoir properties, while the dissolution of feldspar, detritus and calcite and cataclasis are the constructive factors of reservoir properties.1

Key words: Archaeozoic, reservoir characteristics, burial hills, Dongying Sag

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