at the Georgetown and shows consistently high velocities in both wells at the 

 Edwards. 



In general, there is correlation between the velocity log and the resistivity 

 log. In some cases reverse correlations are noted. Both normal and reverse cor- 

 relations are significant in determining lithologic character and fluid content of 

 formations. Hicks and Berry discuss the normal and reverse correlation of 



INTERVAL VELOCITY -THOUSANDS OF FT /SEC 

 6 7 8 9 10 II 12 14 16 18 



-i — i—i — i i i 



INTERVAL TIME - MICROSECONDS 

 1070 970 870 770 670 570 470 370 



Figure 21-5. Velocity log and geologic log, Caldwell County, Texas. 



414 



