---
title: "Fault Expression: A Basic Step-by-Step Guide"
description: Geoteric’s Fault Expression is an intuitive and flexible tool that allows the user to produce fault attributes, blends and detect volumes in one simple workflow.
image: https://blog.geoteric.com/hubfs/Blog2017/Scaling%20Sliders.jpg
---

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[Luis Gomez](https://blog.geoteric.com/technical/author/luis-gomez) | September 15, 2017

## Fault Expression: A Basic Step-by-Step Guide

![](https://blog.geoteric.com/hubfs/Blog%20Defaults/Geo_Author_01.jpeg)

 Luis Gomez

---

 Related Topics:

[Hints and Tips](https://blog.geoteric.com/technical/tag/hints-and-tips) [Blog](https://blog.geoteric.com/technical/tag/blog) [Fault Expression & CMY Blends](https://blog.geoteric.com/technical/tag/fault-expression-cmy-blends) [Adaptive Interpretation](https://blog.geoteric.com/technical/tag/adaptive-interpretation)

Geoteric’s Fault Expression is an intuitive and flexible tool that allows the user to produce fault attributes, blends and detect volumes in one simple workflow. By providing a range of different parameters, the results can be optimized for any size or style of fault. In this blog post, we will go through the process for successfully producing all of the products available in Fault Expression. Later posts will focus on optimizing for different types of faults.

![Generate 3D Volumes](https://blog.geoteric.com/hs-fs/hubfs/Blog2017/Generate%203D%20Volumes.jpg?width=545&name=Generate%203D%20Volumes.jpg "Generate 3D Volumes")

## Fault Expression

We begin by opening the Fault Expression window. Do this by going to the Reveal button in the top right of the main viewer.

We can then begin the workflow.

![Fault Expression](https://blog.geoteric.com/hs-fs/hubfs/Blog2017/GeoTeric%20Fault%20Expression.jpg?width=540&name=GeoTeric%20Fault%20Expression.jpg "Fault Expression")

1. Repeat the optimization process for [SO Semblance](https://www.geoteric.com/blog/why-using-combined-fault-attributes-reveals-more-than-coherence-alone), which looks at phase by assigning the chosen attribute to the magenta box.
2. Repeat the optimization process for Dip, assigning the chosen attribute to the magenta box.
3. Select the CMY button to preview the blend.
4. We can adjust the strength of the three channels with the Scaling sliders.

![Scaling Sliders](https://blog.geoteric.com/hs-fs/hubfs/Blog2017/Scaling%20Sliders.jpg?width=540&name=Scaling%20Sliders.jpg "Scaling Sliders")

1. Once we are satisfied with the blend, select the ‘Detect on CMY’ tab.
2. The most important parameters in the Detect tab are the Enhance values. The larger these values, the larger the faults that will be picked. Click on each of the previews, and check the size of the faults being detected.
3. Once you have found the best option, adjusting the fault confidence slider on the right will increase/decrease the number of faults picked.
4. At the bottom is the fault width slider. Increasing this value should detect fewer, more significant faults. This effect is more subtle and should be the last thing you test.
5. Once your testing is complete, hit the ‘Generate 3D Volumes’ button to run the full workflow.

![Fault expression.png](https://blog.geoteric.com/hs-fs/hubfs/Blog2017/Fault%20expression.png?width=560&height=304&name=Fault%20expression.png)

 

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