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WellCAD Basics - Advanced Logic Technology

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BOOK 1 - WELLCAD BASICS - 223<br />

Right click on the regression line to open a flying menu. Besides accessing the<br />

Regression Settings and the option to Delete a regression object you can trigger the<br />

generation of a new Formula Log based on the equation determined from the<br />

regression.<br />

1.8.4.4 Creating a new Formula Log from a regression equation<br />

The following example shows a cross-plot of a porosity log versus true porosity<br />

measured on core plugs. A linear regression has been applied.<br />

A right click on the regression line brought up a flying menu with the option Add<br />

Formula to Borehole. Selecting this option the Formula dialog box opens with the<br />

equation determined from the cross-plot already entered.<br />

Cross-plot with Formula settings dialog box opened on top<br />

A click on OK created a new Formula Log with porosity log counts calibrated to<br />

true porosity.<br />

1.8.5 Layout and Formatting<br />

Besides using the cross-plot workspace to analyze the data on screen it is important<br />

to allow the layout of the chart to be arranged nicely and the chart to be equipped<br />

with titles, legends and annotations.

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