A field evaluation of CO_2 huff and puff in Wenliu oilfield, Zhongyuan oil region

This paper comprehensively analyzes the influences of the reservoir variables and performance variables on the effects of CO_2 huff and puff in Wenliu oilfield in Zhongyuan oil region, and summarizes a relatively complete set of technologies of CO2 huff and puff. The major problems of sand production and gas production of oil wells after CO_2 huff and puff are successfully solved.