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

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.