Page 126 - Emeraude 2.60 Tutorial

Emeraude v2.60 – Doc v2.60.01 - © KAPPA 1988-2010 Guided Interpretation #6 • B06 - 6/13
B06.3 • Cross-plots
B06.3.1 • Basic cross-plot functions
 Zoom the depth from 4,000 to 4,900 ft. Hit ‘Total range’ to apply the changes.
 Press OK.
 Define two PNL zones from 4,360 to 4,417 ft and from 4,597 to 4,647 ft.
You can use the button in the zone toolbar, or else the button to type in the
exact depths.
 Click the ‘Crossplot’ button. The cross-plot options depend on the interpretation model
chosen as follows:
Single Water model: , eq - eq, ma – Vma
Dual Water model: wa – Swb
With the Single Water model, cross-plots can be built with or without the shale correction.
Fig. B06.11 • Cross-plots
At the top right of the plot are displayed the log values and the cross-plot values. When
entering the dialog those values are the same. In our example the  cross-plot seems to
warrant a higher w, perhaps a higher ma. The local value of those parameters can be modified
either by direct edition in the field, and , by dragging the lines on the screen or
moving the line end-points.
Manual edition
 You can experiment by changing manually the value of ma to 13 and click . The
plot is updated.
 You can change the  values on the plot by clicking and dragging the end-points: the new
values are updated in the boxes.