摘要
用岩心实验的方法对川东地区自流井地层岩石进行了研究,获得了井壁稳定力学模型中的相关参数,建立了岩石抗剪强度破坏条件,为力学模型的求解及确定平衡压力当量密度提供了可靠的数据。平衡压力当量密度的理论计算结果与实钻资料吻合。为该地区钻井液密度的正确选取提供了理论依据和设计方法。
By using the method of core experiment,the author of this article studied the formation rocks of artesian wells(J_r^1) in the eastern part of Siehuan Province.The experiment has obtained the interrelated pa- rameter in meehanies model for the stability of well bores.It has set up a rock shear faihre strength and has provided reliable data for mechanics model to figure out the answers and to determine its equivalent density for balance pressure as well.The theoretical calculating results of equivalent density for balance pressure are in fit with the data of practical drilling.
