The Model of pressure of surrounding rock Under Effect of Shear Stress

Jinhong ZHAO

Abstract


In order to describe the effect of shear stress on the sidewall rock mechanic distribution accurately, in this paper, we have established the micro unit stress equilibrium equation for failure zone and damage zone of the sidewall rock based on damage mechanical mechanism. Establishing the model for calculating radial stress, circumferential stress and shear stress of the sidewall rock considering the shear stress. We have obtained the scope of failure zone and damage zone of the sidewall rock by using central difference method. The result shows that the calculated result considering the shear stress is fit to the actual one.


Keywords


Damage mechanics; Surrounding rock; Shear stress

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References


[1] Wu, F. P., & Pu, C. S. (2008). Study of stress distribution and influenced factors of cased wells in non-uniform in situ stress field. Journal of Oil and Gas Technology, (3), 3-4.

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DOI: http://dx.doi.org/10.3968/7534

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