Page 51 - The Geological Interpretation of Well Logs
P. 51

-  SELF-POTENTIAL  OR  SP  LOGS  -



                                                             750m}
                                               +
                                         500m
                                      *  em _|_-_   675  Orem  A  fm
                                     10my     40me      10m.       lOmy
                                     -  ol  +   mba     why+       wkd

                                                                            —
                                      /
                                                                              |
                                      I
                                                                              |
                           50  f—                                            1  50






                           400                                               —   100
                                 roarker-”                                    |
                                   _   So




                           150  -  x  @                                      1  150
                                a
                                a   -
                                29
                                Se

                                a8
                                oz
                                <  o
                                Sz
                          200  f-  4k                                        4  200
                                ws
                                Zo
                                2s
                                xe
                                x=
                                58
                                 a

                           250  }-      ve                                     250



                           300                                                |  300
                        metres:                                                metres


                        Figure  5.15  Correlation  using  the  SP  log.  Changes  in  water  salinity  indicate  which
                        sand  bodies  can  be  correlated.  Drilling-mud  filtrate  is  similar  in  all  wells.

























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