Page 191 - Well Logging and Formation Evaluation
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Homing-in Techniques 181
0.001
0.0008
0.0006
0.0004
0.0002
Field (T) 0 960 980 1000 1020 1040 1060 1080 1100 1120 1140 Ftot
Fxy
Fax
–0.0002
–0.0004
–0.0006
–0.0008
–0.001
Depth
Figure 12.1.5 Field Due to a Dipole: F tot, F xy, F ax
0.00025
0.0002
0.00015
0.0001
Field gradient (T/m) –0.00005 0 950 1000 1050 1100 1050 DFax
0.00005
–0.0001
–0.00015
–0.0002
–0.00025
Depth
Figure 12.1.6 Field Due to a Dipole: DF ax
