Page 34 - A Practical Companion to Reservoir Stimulation
P. 34

ROCK MECHANICS






                         0



                                               i
                       1000





                      2000                                                 Ground Surface
                                         \
                                          \
                                            \
                                              \
                                                ‘I \          I
                      3000


                              :ritical
                              lepth +
                      4000












                       6000




                       7000
                                                                          \
                                                                           \
                                                                             \
                       8000                                               d
                                                                                \
                                                                                  \

                                                                                     ,
                                                                          i
                       9000                                                          7
                                                                                       \
                                                                                         \

                     10.000
                                      2000       4000       6000       8000      10,000     12,000
                                                               Stress (psi)


            Figure B-2-Critical  depth for horizontal hydraulic fractures as calculated for Example B-4.


                                                                                                              B-5
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