428 



Subject index 



N 



Neutron-gamma logging in, 398-401 



Neutron generators, 



for borehole logging, 398^01 

 construction of, 373-80, 401-8 

 theory of, 401-2 



Neutron radiation, of rock strata, 415 



Oil, 



-chloroform solutions, luminescence of, 



320-1 

 luminescence of, 298-90 318-20 

 spectral characteristics, 322-5 

 Oil-bearing strata, 



detection by gas logging, 283-4, 313-4 

 by loop method, 244, 248, 252, 256 

 luminescence logging, 285-97 

 315-27 



permeability, 352^, 380-2 

 radiation, 414 

 seismical data, 251 

 permeability, determination, 321-5, 

 349-53 

 Oscillations, of multiple reflections, 82^ 

 Oscillograph, for electrical exploration 217-9 



Paleozoic deposits, electrical surveys of, 



202-4, 209-10, 213 

 Permeability, 



determination, errors in, 324-5, 330-2, 

 352-3, 358-60, 364-73 



from core analysis, 354-8, 365, 375-7 

 from specific resistance, 349-52, 

 352-8, 360, 365, 376-82 

 of Devonian sandstones, 349-52, 376 

 of oil-bearing strata, 349-52, 380 

 -specific resistance increase, 332-6, 340-8 

 360-4, 368-76 



-water saturation, of oil strata, 353, 358-60 

 Photography, 



of rock samples, 338, 344 

 of wells. 336-8. 340-7 



Porosity, -specific resistance of rock strata, 



362, 368 

 Primary seismic waves, 



intensity of, 15-18, 28-37 



in multi-layered media, 29-37 



in two-layered media, 28-29 



R 



Radioactive logging, of boreholes, 397-421 

 Reflected multiple waves, 75-97 



damping of, 90^ 



dynamic properties, 80-95 



intensity of, 18-27 



interference with single waves, 75-95 



kinematic properties, 76-80 



oscillation intensity, 85-90 

 Reflected single waves, 



intensity of, 18-27, 37^3 



interference by multiple waves, 75-95 



in multi-layered media, 40-3 



in two-layered media, 37-9 

 Reflection coefficients, calculation, 18, 21-4, 



26-7 

 Reflective rays, spatial direction, 51 

 Refracted rays, spatial direction, 52 

 Refracted waves, 15-18, 28-37 

 Refraction coefficients, 15, 17, 31 



calculation, 17, 21, 26-7 

 Resistivity meters, 



coefficient variation, 384-90 



design of, 393-6 



electrode design, 390-3 

 Rock density, effect on seismic wave intensity, 



30 

 Rock strata, 



disturbance, effect on electrical probes, 

 271-97 



identification by gamma radiation, 400-1, 

 409 



by photography, 344-6 



natural neutron radiation values, 415 



Salinity, effect on resistivity measurements. 

 358-62, 386-90 



