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应用大庆油田头台地区５口井的测井资料和对１４块岩心的室内试验成果，分析了该区块不同岩性在相应围压下的静、动态岩石弹性参数的相关性．依据岩石破坏准则和井壁应力状态方程提出了井壁稳定性条件．研究结果表明，该地区的稳定性较差，安全钻井液密度范围应为１．２６～１．４０ｇ／ｃｍ３．
Based on the logging data of 5 wells in Toutai area of Daqing Oilfield and the laboratory test results of 14 cores, the correlations of static and dynamic rock elasticity parameters under different confining pressure of different lithologies in this block are analyzed. Based on the rock failure criterion and the wellbore stress state equation, the wellbore stability conditions are proposed. The results show that the stability of the region is poor, the safety drilling fluid density range should be 1.26 ~ 1.40g / cm3.