On the base of large numbers of model calculation and plot analysis, found the general rule of borehole shrinkage under the effect of formation dip, maximal principal stress orientation and maximal horizontal stress orientation.

• 在大量模型计算求解的基础上,得到了地层倾角、最大主应力方向及最大水平主应力方向对倾斜蠕变地层段井眼缩径影响的一般规律。