Assessment of Chemical Effects on Wellbore Stability in Transition Shale Formation

Figure 13

Pore pressure distribution around wellbore (a) 0.01 h and (b) 1 h after drilling; effective radial stress distribution around wellbore (c) 0.01 h and (d) 1 h after drilling; and effective tangential stress distribution around wellbore (e) 0.01 h and (f) 1 h after drilling.

(a)

(b)

(c)

(d)

(e)

(f)