66 



Subsurface Geologic Methods 



G(c) 



8 



G X Fx F-Is 



Figure 31. Plan views of oil concentration. Numbers 1 and 2 represent pinch-out- 

 trap reservoirs. Numbers 3, 4, 5, and 6 are typical fault-segment reservoirs. 

 Numbers 7 and 8 are salt-piercement type reservoirs. Wilhelm's reservoir classi- 

 fication indices are given below each drawing. (Adapted from Wilhelm. Am. 

 Assoc. Petroleum Geologists.) 



