Characterization of Rock Mechanical Properties Using Lab Tests and Numerical Interpretation Model of Well Logs

Figure 12

The microscopic failures of the samples in the cross section: (a) tensile fractures in sandstone, (b) shear fractures in mudstone, (c) tensile fractures in mudstone, and (d) shear fracture and tensile fracture in mudstone.

(a)

(b)

(c)

(d)