Page 203 - Fundamentals of Gas Shale Reservoirs

WELLBORE INSTABILITY IN GAS SHALE RESERVOIRS 183

Scale : 1 : 1000 Well B
DB : DQ 10 (2) Depth (4310.02M - 4550.05M) 12/08/2013 01:03
GR Mohr-Coulomb Hoek-Brown Mogi-Coulomb Break-out
CGR MW (g/cm ) 3 MW (g/cm ) 3 MW (g/cm ) 3 BIT_SIZE (IN)
0. 100. 0. 3. 0. 3. 0. 3. 0. 16.
Depth Kick Kick Kick HCAL (IN)
(M) 0. 16.
Break_out (Mohr-Coulomb) Break_out (Hoek-Brown) Break_out (Mogi-Coulomb)
Loss Loss Loss
Break_down (Mohr-Coulomb) Break_down (Hoek-Brown) Break_down (Mogi-Coulomb)

4400

4500

FIGURE 8.8 Determination of safe MWW for Well B using three different failure criteria and assuming VTI properties.