WellCAD Basics - Advanced Logic Technology

APPENDIX A - 471
set to Counts. If the scale mode is set to Cumulative Length the vertical axis of
the histograms is the length in meter.
When displaying the distribution of attributes you can select the attribute class (i.e.
the tadpole library) for which the distribution will be displayed from the Attribute
drop down list.
Mean Tilt & SHmax:
Maximum horizontal stress direction and average tilt angle are calculated from all
selected breakout picks found in each depth interval covered by the Polar & Rose
diagram box. Tow different scaling methods are provided. Direction cosine and sine
are averaged either by the number of measurement (Counts) or by the total
breakout length (Cumulative Length). The values and vectors displayed depend
on the way of counting the recorded components (count as Breakouts, Tensile
Fracture or Other events) and the Scale Mode.
Vector Azimuth and Tilt:
Similar to the vector diagrams available for structural picks this type of diagram
provides a graphical presentation of cumulatively added unit vectors of azimuth or
tilt data. Adding the vectors from top to bottom (or vice versa) even small changes
of breakout orientation over the investigated depth interval can be visualized and
detected.