polar stereographic net, 533, 534 



pollen, 212, 213 



porosimeter, Washburn-Bunting, 234 



porosity, 231-238 



porosity, from velocity log, 416 



porosity, percent, 807 



porosity, relative, 46 



potassium ions, 261 



pressure extrapolation, DST, 744-746 



productivity index, 748 



proration, 794, 795 



pycnometer, 236, 237 



pyrite, 85 



qualitative analysis, DTA, 123, 124 

 quartz and feldspar, differentiation, 110, 

 111 



radioactive tracers, 342, 343, 408 

 radioactivity logs, 334, 335 

 radioactivity of rocks, 194, 195 

 radioactivity tracer techniques, 407, 408 

 radioactivity well logging, 329 

 radioisotopes, permeability surveying, 



407 

 Radiolaria, 217, 220 

 ratio maps, 485 

 ray paths, 564-572 

 reports, 779 



reproduction of maps, 524, 525 

 reproduction of strip logs, 51 

 reserves, calculation, 797-800 

 reservoir studies, 68 

 residue data, plotting, 89-94 

 residues, 75 



residues, preparation of, 76 

 resistivity-departure curves, 290-292 

 resistivity, electric log, 285-293 

 resistivity, formation, 269-273 

 resistivity, formation water, 256 

 resistivity graph for salinity and 



temperature, 270 

 resistivity-measuring devices, 285-288 

 rock bits, conventional, 637 

 rock composition, 66 

 Rocky Mountain Method, 



interpretation of electric logs, 320- 



322 

 Rodgers, P. A., 585, 876 

 rotary well cuttings, 18 

 Russell, W. H., 357, 876 



Sage, J. F., 251, 877 



salt dome, drilling, 693 



salt-muds, 725 



sample descriptions, 26-45 



sample examination check list, 36-38 



sample examination precautions, 36 



sample illumination, 23 



sample lag, 19 



sample log color chart, 54 



sample log symbols, black and white, 56 



sample magnification, 23 



sample preparation, 21 



sample preparation, size analysis, 97, 98 



sample running check list, 24 



sampling, cores, 230 



saturation, 241, 242 



sawing equipment, 61 



Schieltz, N.C., 149, 877 



Schoellhorn, S. W., 409, 878 



screens, vibrating, 730 



section models, 508 



sections, 528 



seismic problems, velocity logs, 420-422 



seismic prospecting, 555 



seismic wave travel, 559-564 



seismogram, 557 



Shepherd, G. Frederick, 367, 878 



shrinkage factor, 799 



shut-in time, DST, 753 



side-wall coring, 705-710 



sieves, Tyler, U. S. Standard, 96, 97 



silver chromate method, 110 



size analyses, 95-103 



skewness, 101 



sodium chloride concentration curves, 



257 

 sodium ions, 261 

 soil analysis 625-628 

 soil-gas method, 623, 624 

 solid models, 506-508 

 solution of samples for insoluble 



residues, 79-81 

 Sonoprobe profile, 581 

 sorting coefficient, 101 

 SP, dipmeter, 389-392 

 specific capacity index, permeability 



surveys, 404 

 spectrographic analysis, emission 



X-ray, 172 

 spinner tool, fluid velocity, 402, 403 

 space-time concept, 442 

 spontaneous-potential curve, 277-284 

 squeeze cementing, 772 

 stain methods, 109-112 

 Stark-Dean distillation, 241, 242 

 static-interface surveys, 401 

 statistical methods, size analyses, 102, 



103 

 stereograms, 535-537 

 stereographic problems, 531 

 stimulation, well, 767, 770 

 stratigraphic and structural 



interpretation, 437 

 stratigraphic correlation, 439 

 stratigraphic map, 449-451 

 stratigraphic tests, 827, 828 

 stratigraphic units, 439-442 



886 



