Page 197 - A Practical Companion to Reservoir Stimulation
P. 197

PRACTICAL COMPANION TO RESERVOIR STIMULATION









                              1



                         9?
                         3
                         c
                         E  0.75
                         a,
                         E
                         F
                         0
                         v)
                         a,
                         -
                         C   0.5
                         0
                         .-
                         v)
                         C
                         E
                         ._
                         n
                            0.25

                              0
                               0     0.1   0.2   0.3   0.4   0.5   0.6   0.7   0.8   0.9    1
                                                      Dimensionless Position


            Figure P-43-Dimensionless  temperature profiles for various efficiencies (PKN model).


                                110

                                100

                                 90
                                 80
                             h
                             8   70
                             -
                             a,
                             C
                             3  60
                             a,
                             [r
                             c  50
                             .-
                             v)
                             0
                             2   40
                             5
                                 30
                                 20
                                 10
                                                                                               *APS = , ..nmonium
                                  0                                                            Persulfate
                                   0.0          0.5           1 .o         1.5           2.0
                                                             Time (hr)

            Figure P-44-  Effects of breakers on viscosity of  borate-crosslinked guar at 160°F (from Gulbis, J. et al.,
            SPE paper 19433,1990).


            P-38
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