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Log analysis applications (view source)
Revision as of 20:42, 16 January 2014
, 20:42, 16 January 2014→Data editing
* Apply depth corrections. These fall into two categories:
* Apply depth corrections. These fall into two categories:
*#Depth shifting traces against each other. To do this, the user visually compares base and unshifted traces, marks corresponding data points (Figure 1), and then shifts the off-depth data to the base trace depths.
*#Depth shifting traces against each other. To do this, the user visually compares base and unshifted traces, marks corresponding data points (Figure 1), and then shifts the off-depth data to the base trace depths.
*#Correct for true vertical depth (TVD), true vertical thickness (TVT), and/or true stratigraphic thickness (see “Preprocessing of Logging Data”).
*#Correct for true vertical depth (TVD), true vertical thickness (TVT), and/or true stratigraphic thickness (see [[Preprocessing of logging data]]).
* Baseline the spontaneous potential (SP). Interactively flattening the SP to a shale baseline at a single value (Figure 2) allows the user to look at SP values quantitatively in order to calculate water resistivity (''R''<sub>w</sub>) and estimate shale content.
* Baseline the spontaneous potential (SP). Interactively flattening the SP to a shale baseline at a single value (Figure 2) allows the user to look at SP values quantitatively in order to calculate water resistivity (''R''<sub>w</sub>) and estimate shale content.
* Convert data scales (both ways): conductivity to resistivity, raw data to porosities, neutron porosities to a different matrix, metric to English depth units, percent to decimal, and so on.
* Convert data scales (both ways): conductivity to resistivity, raw data to porosities, neutron porosities to a different matrix, metric to English depth units, percent to decimal, and so on.