Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (1): 46-51.doi: 10.3969/j.issn.1673-8926.2012.01.009

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Reservoir characteristics of Xujiahe Formation in northeastern Sichuan Basin

LI Kuo1， ZENG Tao2， PAN Lei2   

  1. 1. Key Laboratory of Exploration Technologies for Oil and Gas Resources， Ministry of Education， Yangtze University， Jingzhou 434023， China； 2. Sinopec Exploration Southern Company， Chengdu 610041， China
  • Online:2012-02-20 Published:2012-02-20

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Abstract:

According to the test of drilling cores and outcrop samples, thin section analysis and scanning electronic microscope, this paper studied the reservoir petrologic characteristics, reservoir space types, diagenesis, pore structure and pore types of Xujiahe Formation in northeastern Sichuan Basin. The result shows that the reservoir sandstone of Xujiahe Formation presents petrological characteristics of medium-fine grained texture, lower compositional maturity and medium textural maturity. The reservoir pore spaces include residual primary intergranular pores, secondary dissolved pores and fractures. The pore structure is mainly of fine pore and thin throat. The study area is mainly of typical reservoir with low porosity and low permeability.

Key words: polymer flooding, water cut, characteristic parameter, fitting point, impact analysis, sensitivity

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