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Line 43: − [[file:determination-of-water-resistivity_fig3.png|left|thumb|{{figure number|3}}Log used in example of calculation of water resistivity. Copyright: the SP method. (From <ref name=pt04r20>Western Atlas International, 1985, Atlas log interpretation charts: Houston, TX.</ref>; courtesy of Atlas Wireline Division of Western Atlas.]]+ − +
Water resistivity determination (view source)
Revision as of 16:52, 11 March 2014
, 16:52, 11 March 2014→SP method
Equation 1 is used in the quantitative interpretation of the SP log.
Equation 1 is used in the quantitative interpretation of the SP log.
===Procedure===
===Procedure===
[[file:determination-of-water-resistivity_fig3.png|thumb|{{figure number|3}}Log used in example of calculation of water resistivity. Copyright: the SP method. (From <ref name=pt04r20>Western Atlas International, 1985, Atlas log interpretation charts: Houston, TX.</ref>; courtesy of Atlas Wireline Division of Western Atlas.]]
The procedure to determine ''R''<sub>w</sub> from the SP is outlined as follows. The data required include the SP, the invaded zone resistivity, the formation temperature, and the mud and mud filtrate resistivities at the given formation temperature.
The procedure to determine ''R''<sub>w</sub> from the SP is outlined as follows. The data required include the SP, the invaded zone resistivity, the formation temperature, and the mud and mud filtrate resistivities at the given formation temperature.