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70      PETROPHYSICS: RESERVOIR ROCK PROPERTIES










































                         Figure 2.18. Viscosity ratio as a function of pseudo-reducedpressure BO].





                                                  TABLE 2.6
                              COMPARISON OF API GRAVITY AND SPECIFIC  GRAVITY 60°F
                                                                        AT
                                                                 [
                                        AND 1 ATMOSPHERE PRESSURE 131
                         API Gravity          Fluid Type            Specific Gravity
                         -8                Heavy oil and brine           1.1460
                         -4                Heavy oil and brine           1.1098
                          0                Heavy oil and brine           1.0760
                          5                Heavy oil and brine           1.0366
                         10              Heavy oil and fresh water       1 .ooo
                         15                    Heavy oil                 0.9659
                         20                    Heavy oil                 0.9340
                         30                     Light oil                0.8762
                         40                     Light oil                0.8251
                         50                 Condensate fluids            0.7796
   92   93   94   95   96   97   98   99   100   101   102