(1. State Key Laboratory of Petroleum Resources and Prospecting，China University of Petroleum，Beijing 102249，China； 2. Tarim Oilfield Company，PetroChina，Korla，Xinjiang 841000，China)
Abstract：The purpose of this paper is to predict the radius of plastic zone for a high pressure gas well during well testing. Firstly，the plastic radius equation is given for idealized elastoplastic model considering of varying pressure. Secondly，it drew a comparison between the pressure distributions for the two kinds of flow models，and pointed out that the flow model including the gas acceleration term has a more steepening pressure curve near the wellbore. Then，it analyzed the radius of the plastic zone for the two kinds of flow models，and pointed out that the flow model including the gas acceleration term has a larger radius of plastic zone for the same factors. Finally，influencing factors such as bottomhole pressure，permeability，borehole diameter，gas acceleration，property of rock and in-situ stress on the radius of the plastic zone were analyzed，and summarized the influencing rules.
姜海龙1，陈 勉1，金 衍1，周 玉2，卢运虎1. 高压气体渗流对裸眼井筒塑性区半径的影响分析[J]. 岩石力学与工程学报, 2015, 34(S2): 4286-4294.
JIANG Hailong1，CHEN Mian1，JIN Yan1，ZHOU Yu2，LU Yunhu1. ANALYSIS OF PLASTIC ZONE RADIUS FOR OPEN HOLE WELLBORE WHEN A HIGH PRESSURE GAS FLOWS INTO A WELL. , 2015, 34(S2): 4286-4294.
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2015, Vol. 34 
