Page 288 - The Geological Interpretation of Well Logs
P. 288
INDEX
acoustic imaging 216 et seg. computer-based 259 structural dip 190
examples 221 interval 174 tadpole plot 175
quantitative interpretation 223 palaeontology 255 tools 170
acoustic impedance 109 topography 258 unconformity 192
acoustic logs see sonic logs corelogram 174 dynamic normalisation 203
amplitude 221 CPI (computer-processed
API unit 71, 137 interpretation) 166, 168 electrical images
Archie 45, 57 cross-bedding 209 quantitative uses 215
Archie Equation 57 cross-beds 184 electrofacies 167, 232
arkose 80 cross-plots 160 electron density 117
Array Induction 53 interactive 162 electrosequence 231
array sonic 109 cycle skipping 96 electrosequence analysis 231-7
average velocity ranges 99 erosion surface 240
azimuth 169 deep resistivity 51, 62 evaporite radioactivity 80
azimuth vector plot 177 density, common 117, 121 evaporites 123, 145, 149
evaporites 123
bed boundary 15, 16, 157 gas effect 120 facies 40, 63, 226, 236, 255
bed resolution 13, 14, 54 prain 119 fault drag 194
black shale 75 logs 115 et seg. faults 193,213
blocking 17 porosity 116, 119 feature recognition 173
borehole televiewer 199, 216 shales 121 fixed interval correlation 173
breakouts 30, 32, 222 tools 117 fluid pressure 9
bulk density 115, 119 density and photoelectric factor logs flushed zone 47
qualitative use 121 folds 195
caliper, dual (4 arm) 30 quantitative use 119 formation resistivity factor, F 44,
simple (2 arm) 28 depositional environments 226, 236 57, 59
caliper logs 26 et seq. depositional sequence 239 fractures 25, 102, 113, 124, 198,
carbon isotope ratios 261 depth 18 213, 216, 22]
carbonate radioactivity 80 depth of investigation 12, 52, 55 drilling induced 222
caving 28 diffusion potential 34 fresh water 38
CEC 46 dipmeter full waveform sonic logs 109
CGR 71 and seismic 191
clay 45 azimuth rose 176 gamma ray 261
minerals 86 cross-beds [84 grain-size 229
resistivity 45 faults 193 gamma ray log 67 et seq.
volume 39, 78 folds 195 qualitative use 79
clustering 166 field log 173 quantitative use 78
coal 83, 100, 124, 144 histogram 176 shapes 83, 226
compaction 63, 102, 121, 143 interpretation 180 gamma ray tool 70
completion log 159 log 169 et seg. genetic stratigraphic sequence 239
composite log 159 microresistivity 171, 188 geothermal gradient 12, 19, 20
compressional (P) wave 92 pads 172 glauconite 81
Compton scattering 69, 72, 116 palaeocurrents 186
condensed sequence 89, 244 processed log 175 HCS (hummocky cross-
conductivity logs 42 ef seq. processing 172 stratification) 188, 206
core 204 quality assessment 178 heavy minerals 80
cores 153 quality rating 180 Horner plot 21
correlation 62, 85, 100, 253 resolution 183 Humble Formula 57
at outcrop 257 stick plot 177 hydrated minerals 146
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