关键词: 泥浆密度, 收缩速率, 计算方法, 应力分析, 盐层, 井眼收缩, 非线性, 边界条件, 流变模式, 岩石流变学

Abstract: On the basis of mathematical and rheological analysis of stress and timedependent deformation of rock salt in deep wells,a new numerical method to calculate the mud density for penetrating salt formation is studied.As the nonlinear creep model of rock salt obtained under simulated stress and temperature conditions is taken into consideration,the method is more accurate and applicable.By using this method a series of curves of mud density vs.formation depth and temperature are plotted.The results are in fairly good agreement with the field data.