Page 161 - Basic Well Log Analysis for Geologist
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wUU  INTERPRETATION  CASE  STUDIES











                             SHALE  INDEX                WET   RESISTIVITY   WATER     POROSITY
                                                            OHMS   M?/M    SATURATION   ANALYSIS
                                                                      1000]  100   Oj  25     °
                                                  2
                             GRAIN   DENSITY      >       DEEP   RESISTIVITY   CALIPER   (~)   BIT   SIZE
                                                  o         CHMS  M“/M               E
                                                  oS
                                                  m                   1000]  -20
                                                  z
                                                  a
                                                  a
                                                  5
                                                  2











































       Figure  56.   Computer  processed  Cyberlook*  Log.  Pennsylvanian  Atoka  Sandstone,  Permian  basin.
              From  a  depth  of  14,600  to  14,625  ft.  note:
                     1.  Low  water  saturations  (indicated  on  left  side  of  track  #3)  and  high  porosities  (indicated  by  curve  on  right-hand
                       side  of  track  #3)  calculated  by  Cyberlook*  Log.
                     2.  Shading  in  track  #2  indicates  separation  between  wet  resistivity  (R,)  and  deep  resistivity  (Ry. q).  The  greater
                       the  separation,  the  greater  the  hydrocarbon  saturation.






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