How Do I...

Answers to How Do I... questions.

I-Data+Strat Section

A: First, create the stratigraphy section, with all border annotations included as you typically do. Save this diagram in Rockplot2D.

Create the I-data section with no border, axis, or title annotations. Turn on the Other 2D Files layer and specify the Stratigraphy section file name as an Underlay file. RockWorks will generate the I-Data secton and append the stratigraphy section underneath.

If you have color and stratigraphy legends in the diagrams, they may end up on top of each other; you can use the Edit Mode tool in RockPlot to drag them to a preferred locatoin.

Other notes: You can constrain the I-data model within any of the stratigraphic surfaces by activating the Superface and/or Subface filters during model generation.

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Zero-level contour

A: Picture an island in the middle of the ocean, and you want to show 1-foot contour elevations for the island. The 1-foot elevation contour is easy to draw because it follows elevations that lie between 0.9 and 1.1, and the 2-foot contour is no problem because it falls between 1.9 and 2.1. But the zero-level contour is a challenge - there's a whole sea of zero (literally) and it doesn't fall between two other levels. Along the same logic as saying that the first grains of sand that sit just slightly higher than sea level form the boundary of the island, the "zero" contour level can be drawn at a level just-slightly-greater-than 0.0. In RockWorks, simply create a custom contour table with the lowest contour interval at 0.01 (for example), and additional contour levels of your choice, and voila!

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3D Borehole Locations

A: The simplest way is to activate the Striplogs layer in the 3D diagram settings, and then select the items you wish to show in the 3D logs. You can include simple "sticks" (below, left, with log Titles and Axes only) or more detailed logs displaying actual data (below right, with log Titles, Axes, I-Data "oblates").

Note that you can always append a saved 3D log scene to any other 3D scene in your project at any time.

Another method is to export a 2D map from RockPlot2D to RockPlot3D, either as a floating or draped image. The example below shows a Maps | Borehole Maps point-map which was File | Exported from RockPlot2D to RockPlot3D floating at a fixed elevation, and appended to the existing 3D scene.

This example shows a draped image layer included with the 3D view.

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Filtering models above ground

A: A solid model is always orthogonal, like a box, with extents (usually) defined by the project dimensions and containing nodes equally-spaced within it. While you can't get rid of the nodes that lie above the ground, you can set them to be invisible. For all types of solid models (Lithology, I-Data, P-Data, etc.) access the Model tab, Create New Model, and Special Options. Turn on the Superface filter. It can be set to Automatic (the model will be clipped by a surface fit to the top of the boreholes) or Manual (you select a grid surface of your choice). Set the filtered nodes to Null and they'll no longer be visible in diagrams, included in volume computations, etc.

There is also a Subface filter to remove nodes below the borehole bases or below another surface of your choice.

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T-Data Contour Maps

A: T-Data (Time-Based Interval Data) is frequently entered into the Borehole Manager at a very low density - often one sample per borehole per date. While you certainly can create a 3D solid model to represent this data, it may make more sense to interpolate in 2D. Use the T-Data / Statistics Map option to create a 2D grid model of the Highest T-Data Values for your selected track and date.

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Solid Model Cutouts

A: Once you have an all-voxel or isosurface model displayed in RockPlot3D, use the Edit | Add Cutout option to remove a piece of the model in order to view inside. You can adjust the position of the cutout using an interactive window. Multiple cutouts can be inserted.


 

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