960 



EXPLORATION GEOPHYSICS 



Fig. 591. — Geochemical log, dry hole, about 3,500 feet outside (present) limits of production. 

 (Rosaire, A.A.P.G., Vol. 24, No. 8, August, 1940.) 



Figure 590 shows the geochemical well log of a producing well in the 

 Friendswood oil field. The oil is of approximately 40° Be gravity. The 

 total hydrocarbons began to attain significantly high values at about 5,300 

 feet and yielded the highest value at about 6,040 feet, from which depth 



