Miscellaneous Subsurface Methods 



631 



Figure 331 is a typical example of the use of dipmeter data in sueh 

 work. The original well, No. 1, was dry in all sands to a depth of about 

 7,500 feet; some slight saturation, however, was found in the top of the 

 sand reservoir at 6,500 feet. The dipmeter survey showed a dip of 67° 

 S. 33° E, on the top of the sand and a dip of 76° S. 36° E, near the base. 



,__^^ \ 6800 



Figure 330. Dipmeter-survey results; useful in determining structural relationships 

 of wells and may also assist in determining contour trends. 



The well was sidetracked northwest on the basis of this data, and the 

 sand was found to be productive at about 6,000 feet, some 500 feet higher 

 than in the original hole. 



The sand topped at 6,500 feet, A, has an apparent thickness of 410 

 feet; the actual thickness, however, using an average dip of 70°, is only 



