Page 335 - Well Logging and Formation Evaluation

Index 325

Sphericity, sample, 22 Temperature
Spin, 77 ambient, 20
Spontaneous potential (SP), 6, 13, bottomhole, 39
39 maximum, 13
SSM—see Shifted spectrum method Tension, 29
Staining, visible, 23 Tension, interfacial, 60, 61
Standard deviation, 99 Testing, 24
Standing & Katz, 156–157 Testing, well, 166–170
Station charge, 9 Texture, sample, 22
Stations, survey, 195 Thermal decay neutron, 93–95
Steady state, 164 Thermal decay time (TDT), 124
Sticking, differential, 15 Thermal decay tool, 8
Stock tank oil initially in place Thin beds, 86, 87
(STOIIP), 1, 41, 59, 73, 92, 120, Thomas-Steiber plot, 89–92
145 Thorium, 6
Strain gauge, 47 Time domain analysis (TDA), 78
Strategy, logging, 11 Time, dimensionless, 167
Stress, vertical, 115 Time, wait, 79
Strike direction, 140 Time-lapse, neutron, 94
Strike line, 140 Time vs. depth (TZ) graph, 104
Stuck tools, 14 Tool failure, 4
Supercharging, 43 Toolface, 173
Surfactants, 80 Tools, back-up, 11
Survey, gyro, 47 Tools, stuck, 14
Survey charge, 9 Toolstrings, 13
Survey tools, gyro, 196 Total porosity mode, 83
Survey well, 183 Tramline, 32
Surveying, 195–197 Transmission charge, 10
Surveying, legal factors, 197 Tree, decision, 121–124
S w (water saturation), 1 Triangulation, 142, 189
Swamps, 148 True north, 195
SWPOR, 99 True vertical depth (TVD), 47, 180,
Syncline, 153 193, 203
Synthetic seismograms, 103–108 T w, 79
Two way time (TWT), 104
Type, sample, 22
T
TZ (time vs. depth) graph, 104
T 1, 7, 77 TZ relationship, 108
T 2, 7, 78, 79
Target well, 183
U
TDA—see Time domain analysis
TDT—see Thermal decay time Ultraviolet (UV) light, 17, 22, 23, 50
Telemetry, 200 Uncertainty, 11, 96–101