Assessment of Chemical Effects on Wellbore Stability in Transition Shale Formation

Figure 15

Damage zone around the wellbore (a) 0.01 h, (b) 1 h, and (c) 100 h after drilling for a reflection coefficient of 0.2; (d–f) for a reflection coefficient of 0.3; and (g–i) for a reflection coefficient of 0.4.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

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(i)