the contact between thick sandstones or limestones and the adjacent shales show 

 abnormal results, although reliable values frequently have been obtained at such 

 contacts. 



APPLICATION Dipmeter surveys provide data assisting in 



the solution of many structural and strati- 

 graphic problems encountered in exploratory and pool development wells. The 

 correct location of offset wells after one has been drilled is a common problem. 

 If the initial well is a wildcat and a dry hole, it is necessary to know, first, 

 whether the sediments are flat or whether there is some evidence of structure, 

 and, second, what is the direction and amount of dip. Dipmeter surveys have 

 been of considerable help in evaluating structural control in directional-drilling 

 problems and in unraveling structural conditions adjacent to piercement salt 

 domes. They have also played important roles in establishing the stratigraphic 

 relationships above and below unconformity surfaces and have assisted in 

 better interpretations of faults. They have served as control during the inter- 

 pretation of seismic data and in outlining potential entrapment areas. 



Reprinted from Subsurface Geologic Methods, 1951, p. 625-630. 



393 



