Miscellaneous Subsurface Methods 



639 



figures 335 and 336, where a dipmeter survey was made in each of five off- 

 set wells. Wells 4 and 5 are direct offsets to wells 1 and 2, respectively. 

 The correlation of well 1 with well 4 is fairly obviously from the logs; 

 likewise, the correlation of well 2 with well 5 is apparent. However, owing 

 to thicker sections, the correlation of well 1 with well 2 and well 4 with 

 well 5 is more difficult. Dipmeter results in wells 1, 2, 4, and 5 indicate 

 steep dips to the west and southwest on beds A to E inclusive, thus ex- 



NW 



SE 



Figure 337. Dipmeter data as used in evaluating fault problems 

 encountered in wells. 



plaining the thicker sections in wells 1 and 4. A dip of about 10° N. 

 30° W. in the upper beds contrasts with much steeper and westerly dips 

 m the lower sections, and thereby identifies tlie angular unconformity. It is 

 of interest to note that the dip in wells 1 and 4 increases with deptli. Like- 

 wise, the apparent thickness of the formations is greater in well 1 than in 

 well 2. The dipmeter determinations, thus, in general reflect a thickening 

 of the section downdip and off-structure from east to wxst. 



Dipmeter results in well 3 indicate dips as steep as 50° to 60° due 

 east, a sharp reversal from the west dip of well 2. The recognizable forma- 



