Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (6): 49-53.doi: 10.3969/j.issn.1673-8926.2012.06.009

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Reservoir characteristics and evaluation of Yan’an Formation and Chang 3 oil reservoir set in Pengyang area, Ordos Basin

YU Lei1， CHEN Jianwen1， JIN Shaochen2， CHEN Zhenbo1， GUO Xiaoyan3， CHE Fei1   

  1. 1. Ultra-low Permeability Reservoir Research Center， PetroChina Changing Oilfield Company， Xi’an 710021， China； 2. No. 3 Oil Plant of Ultra-low Permeability Reservoir， PetroChina Changing Oilfield Company， Ningxia 750000， China； 3. Qinghe Oil Production Plant， Sinopec Shengli Oilfield Company， Shouguang 262714， China
  • Online:2012-12-20 Published:2012-12-20

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Abstract:

Based on the data of cores and thin sections of Jurassic Yan’an Formation and Chang 3 oil reservoir set in Pengyang area, combining with testing data, this paper studied the rock characteristics, pore throat types and reservoir properties, and analyzed the influencing factors of reservoir development. The result shows that the reservoir rock is mainly of arcose, reservoir space is mainly of primary intergranular pores, and reservoir properties are mainly controlled by sedimentary environment and diagenesis. Finally the reservoir classification evaluation was carried out by using gray relative analysismethod.

Key words: depressed area, upper source rock and lower reservoir, lateral migration model, fault condensed belts, Fuyu and Yangdachengzi oil layer, Sanzhao depression, Songliao Basin

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