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Feasibility Study on Removing Pollution near Wellbore by Gas Injection in Gas Condensate Field Development

Lv Pei (Southwest Petroleum University Oil Engineering College,Chengdu,Sichuan,610500,China) Ma Qing ,Fan Hongwei(Karamay Vocational and Technical College,Karamay,Xinjiang,834000,China) Chen Wenlong (PetroChina Tarim Oilfield Company Gas Management Department,Korla,Xinjiang,841000,China)  
In order toenhance gas well productivityand solve the problemofretrograde condensate near the wellbore and reverse- dialysis pollution in Yingmaili,it is necessarytooptimize and adjust the existingproduction system. For this purpose,studied are condensate gas well productivity sensitive factors,property change and change of pressure near the wellbore in throughput operation simulation and analyzed is the feasibility of mitigating the retrograde condensation pollution. The results showthat gas injection is an effective waytoimprove oil recovery,and hold- up ofpressure near the wellbore is veryimportant for avoidingthe retrograde condensation.
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