StructuralUncertainty Plugin

[HansKallekleiv]

Plugin to analyze FMU runs where structural uncertainty is explored stochastically using Cohiba.

Typically in an FMU settings seismically interpreted reflectors together with geologically interpreted features (isochore based surfaces) are modelled stochastically using Cohiba This results in an ensemble of surfaces with equal geometry, but varying z-values. All surfaces should be restrained by hard conditioning points, such as well tops and zonelogs, as well as the input seismic interpretation uncertainty, velocity uncertainty and correlations between the different surfaces.

This plugin enables analysis of these results:

• 2D maps of individual ensemble members, statistical and difference surfaces with calculated well intersection markers.
• Intersection view along a well trajectory or from a polyline drawn interactively from the map view
• Uncertainty table to display well intersections
• Filter to focus on different collection of ensemble members, e.g. different input velocity models
• Comparison between different ensembles

The plugin follows the FMU standards with regards to surface naming and placement on the filesystem.
Wells are not required, but if provided must be on RMS Well format. It is recommended to include no logs, except from an optional Zonelog and MDlog.

In general data should be provided fit for purpose, with regards to resolution and sampling.

The plugin can be initialized with initial settings, such as which well and stratigraphy is visualized. See the plugin documentation for a full description.

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Contributor checklist

• 📜 I have broken down my PR into the following tasks:
  • Consolidate surface loading and statistical surface calculation using SurfaceSetModel
  • Add realization filter
  • Visualize statistics independently, as well as individual realizations
  • Add color customization
  • Add map views
  • Add ensemble comparison
  • Add zonelog/well marker
  • Add fence specification from map view
  • Improve layout and presentation
  • Add uncertainty table
  • Update documentation
• 🤖 I have added tests, or extended existing tests, to cover any new features or bugs fixed in this PR.
• 📖 I have considered adding a new entry in CHANGELOG.md, and added it if should be communicated there.

[tnatt]

Will this work if you e.g. have a fault or erosional surface that causes the stratigraphy to not strictly increase/decrease by one along the well?

[anders-kiaer]

🎉🤩