Page 159 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2
P. 159
148 Reservoir Engineering
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!!
too 200 I
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RESISTIVITY ow M=/M
s:
0
0
/
0
II
I
Figure 5-72. Example of an SP curve that requires correction and one that
does not.
dissolved salts, they generally have low resistivities. Hydrocarbons do not conduct
electricity, therefore rocks that contain oil and/or gas show high resistivity. This
is the way hydrocarbon-bearing zones are differentiated from water zones.
Resistivity tools are divided into three types based on the way measurements
are made: (1) non-focused (normal) tools, (2) induction tools, and (3) focused
resistivity tools. Microresistivity tools will be treated under a separate heading.
