772 



Subsurface Geologic Methods 



tiple producing zones. Subsequent drilling of the anomaly resulted in the 

 discovery indicated. This field is reported to be producing from the Can- 

 yon sand at a depth of between 3500 and 3600 feet. The well in the cen- 

 tral portion of section 15 has only a small production from the Palo Pinto 

 line at 2640 feet. 



Figure 411 is taken from a geochemical well log of a well in the 

 Friendswood Oil Field, Harris County, Texas, from data supplied by L. 

 Horvitz. The oil is approximately 40° Baume' gravity, and produces from 

 a depth of 6040 feet. 



Figure 412. Geochemical well log of dry hole, Alemeda area, 

 Harris County, Texas. (After Horvitz.) 



Future Possibilities 



Results from basic research in the field of geochemistry and the trend 

 in thinking among geologists who have been using geochemistry as an aid 

 in petroleum exploration indicate that it might be possible in the future 

 to evaluate the petroliferous possibilities of an entire sedimentary basin 

 or province. In other words, by studying the fundamental geochemical 



