Stress Characteristics near Wellbore and Prevention Casing Deformation for Fracturing Horizontal Wells

Figure 10

Mises stress near the wellbore under the uniformity coefficient-fracturing pressure.

(a) Uniformity coefficient 1.0, 1.1, 1.2, and 1.3 and fracturing pressure 40 MPa

(b) Uniformity coefficient 1.2 and fracturing pressure 40, 50, 60, and 70 MPa