Page 290 - The Geological Interpretation of Well Logs
P. 290
- THE GEOLOGICAL INTERPRETATION OF WELL LOGS -
definition 239 sonic frequency 107 uses 23
SGR 71 sonic gas effect 98 goetemperatures 19
shale lithology 99 thermal conductivity 19
alteration (sonic) 104 porosity 97 thermal maturation 23
compaction 122 textures 99 thorium 69, 76
conductivity 65 source rock, density 126 thorium/potassiwm ratio 86
porosity 63, 103, 125 neutron 144 thonum/uranium ratio 88
potential 34 radioactivity 82 time average equation 97
tadioactivity 77 Tesistivity 65 time constant 73
resistivity 60 sonic 104 time of flight 218, 221
velocity 99, 102 SP logs see self-potential logs time series analysis 265
volume V,, 39, 78, 85 spectral gamma ray 263 tool response values 158
shallow resistivity 51, 62 spectral gamma ray log transgressive surface (ravinement
shear wave 109 qualitative and semi-quantitative surface) 243
shoulder effect 16 uses 86 turbidites 188
siderite 62, 123, 132, 149 quantitative uses 85 unconformity 192, 212
sidewall core 155 stratigraphy 239 ez seq. uplift (from sonic) 103
slowness 109 computer aided correlation 258 uranium 69, 75
slumps 214 facies successions 247
sonic logs 91 ef seg. high resolution 239 velocity 95
gualitative uses 98 surfaces of slow deposition 244 vertical resolution 14
quantitative uses 97 surfaces with erosion 240 volcanic rock radioactivity 82
seismic applications 107 surfaces with drowning 242 voleanic rocks 146
sonic tools 92 traditional correlation methods
source-rock 65, 82, 104, 126 255 , washout 30
spectral gamma ray log 67 structural dip 190 water resistivity 39
Static normalisation 203 synthetic seismic logs 108 water salinities 44
static SP 37 systems tract 247-51 well logs | et seg.
step distance 174 wireline logs 1
stereographic plots 177 temperature 12, 19
Stoneley wave 109 temperature (BHT) correction 21,
stress fields 3) 22
structural dip rotation 177 temperature logging 19 e¢ seq.
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