368 



Subsurface Geologic Methods 



MtidHlfrs 



cn«e 



«+ion 



^«is(tvily:qio 



55 



M«♦<^ 



Sf^ 



40 



^tffrt^' 



Fspu^ 



SR 



1100 



1200 



1300 



1400 



1500 



1600 



Figure 154. Log showing SP to be virtually nil. Mud resistivity is very close to 

 formation-water resistivity. 



