240 M. N. Berdichevskii 



The KS values were calculated from formvila (5) and in the construction 

 of the KS curves were referred to the working distances R, determined 

 according to (14). 



To find the coefficient of the azimuthal arrangement and the correction 

 factor p, nomograms were used. In other respects, the method of two-way 

 curved azimuthal probes did not differ from the method of two-way quad- 

 rilateral probes. 



The characteristic curves of two-way curved azimuthal probes are given 

 in Fig. 9. As shown by control measurements, the KS values in azimuthal 

 probing are reproduced with an accuracy up to 5-6%. Under the conditions 

 of a stable geoelectrical cross -section and the more or less gentle slope of the 

 rocks, the curves of the azimuthal probe agree well with curves for the 

 quadrilateral probe carried out in approximately the same direction in 

 which the field laboratory travelled during the azimuthal probing. 



In the method of interpreting two-way curved azimuthal probes, there 

 is nothing which is in principle different from the method of interpreting 

 two-way quadrilateral probes. 



When constructing the profiles of the resulting values, the points of the 

 record lay on a straight line by the side of the curved profile of the probe. 



REFERENCES 



1. L. M. Al'pin, The Theory of Dipole Probes. Gostoptekhizdat (1950). 



2. M. N. Berdichevskii, and A. D. Petrovskii, The method of quadrilateral probes. 

 Applied Geophysics, No. 14, Gostoptekhizdat (1955). 



