Experimental research of condensate blockage and mitigating effect of gas injection

作     者：Zhouhua Wang Shili Zhu Wei Zhou Huang Liu Yisheng Hu Ping Guo Jianfen Du Junjie Ren 

作者机构：State Key Lab of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengduChina Experimental Test Research Institute of XinJiang Oilfield CompanyPetro ChinaKaramayChina 

出 版 物：《Petroleum》 (油气（英文）)

年 卷 期：2018年第4卷第3期

页      面：292-299页

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 07[理学] 070202[理学-粒子物理与原子核物理] 0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0827[工学-核科学与技术] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Supported by Research Fund for the Doctoral Program of Higher Education of China:Theoretical model study of non-equilibrium phase state for high temperature and high pressure muticomposition condensate gas(20115121110002) 

主　　题：Condensate blockage Experiment method CO2 injection Injection volume 

摘      要：The condensate blockage causes a substantial decrease in well productivity for gas condensate *** on the previous studies,a novel experimental method was designed to evaluate condensate blockage and the mitigating effect of gas *** method considers the stacking effect in the near wellbore region and the gas flow in the far wellbore *** is an intermediate vessel containing condensate gas at the entrance of core holder in the experimental *** the process of pressure depletion experiment in a long core model,the vessel is connected to the core and the pressure of the vessel remains above the dew point *** seriousness of condensate blockage is investigated by this *** pressure drops to maximum retrograde condensation pressure,the gas permeability decreases by 80%compared with the initial gas *** experiments were conducted to study the removal effect of different injection fluids and different injection *** results show that CO2 injection is more effective than methanol in mitigating condensate blockage and the optimal CO2 injection volume is around 0.15 HCPV。