Abstract：Lost circulation and borehole collapse often occurred in petroleum drilling.The key is that the three pressure profiles which can maintain borehole stability couldn’t been prodicted.The mechanics analysis software is successfully developed for borehole stability after plenty of theory reseach and experiment. The laboratory measurement and well logging data analysis method are introduced to get formation strength and mechanical parameter which are necessary in the software. The prediction with the software is applied to drilling in Nanhai oilfield，and the results are satisfactory.
王金凤 邓金根 王利华 王炳印. 利用测井资料建立地层三个压力剖面的软件研制及其应用[J]. 岩石力学与工程学报, 2002, 21(S): 2144-2148.
Wang Jinfeng， Deng Jingen， Wang Lihua， Wang Bingyin. DEVELOPMENT AND APPLICATION OF SOFTWARE FOR THREE FORMATION PRESSURE PROFILE DETERMINED BY LOG INFORMATION. , 2002, 21(S): 2144-2148.
2002, Vol. 21 
