CO2 huff and puff technology and oil increase application in Zhongyuan oilfield
The reservoirs in Zhongyuan oilfield are scattered,with small reserves,difficult water flooding or belong to heavy oil,and reservoirs with these characteristics are suitable for CO2 huff and puff.Based on the CO2 huff and puff practice in Zhongyuan oilfield,this paper introduced how to screen reservoirs suitable for CO2 huff and puff,explored the CO2 huff and puff well selection mechanism,summarized the well selection principles,and established the CO2 huff and puff well selection method.In addition,we carried out CO2 huff and puff tests around four different reservoirs,achieving oil increases of 348.13 t(260 d),172.0 t(240 d),20 t(45 d),and 108 t(120 d),respectively.Our research provides an effective basis for enhanci oil recovery and future CO2 huff and puff applications.
Zhongyuan oilfieldCO2 huff and puff well selectionenhanced oil recoveryCO2 oil displacement
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