The Facies Modeling workflow
With the Facies Modeling workflow (model > Facies) you can create a facies model based on an upscaled discrete well log property, such as lithology or facies. During facies modeling, you populate the grid cells in-between the wells, using a modeling method of your choice.
The workflow takes you through the following steps: creating a model, assigning input data, defining sub-sets of your grid (i.e. Volumes of Interest, VOIs), assigning a modeling method, analyzing your data, fine-tuning the modeling parameters and running the model. You can follow these steps on a per-VOI basis.
Volume of Interest (VOI) A sub-set of your 3D grid. It allows you to populate your 3D grid with facies by modeling each VOI separately.
Defining VOIs VOIs are determined by selections you make on the Create Model form, more specifically the property you select under 'Volume definition' (optionally in combination with nesting via the option 'Nest classes from').
Going through the workflow on a per-VOI basis It is recommended to take each VOI one by one through the workflow. You start with assigning a modeling method to one VOI. Only once you have completed defining the model parameters for one VOI, you should proceed with the next VOI. This lets you to focus on each VOI separately, analyze its data and fine-tune its modeling parameters. At the end of the workflow, you can run your model in parallel for all or only certain VOIs you selected.
Workflow steps Since each modeling method has its own specific set of modeling parameters, the workflow will automatically take you to the next relevant step. Some steps might be skipped depending on the method you selected or the data you have. For example, assigning a training image is only relevant when you are using MPS and assigning a variogram is not necessary for MPS.
Facies model The container which holds all the associated metadata: upscaled property, volume definition (i.e. VOIs), modeling method and modeling parameters per VOI, etc.
Facies grid property The resultant grid property, which is a combination of all modeled VOIs. Once you have run your model, it will be available in the JewelExplorer (3D Grids > Your 3D Grid > Properties > Facies > Your Facies Grid Property). It is read-only and has the same name as the facies model.
To know how to model facies with multiple realizations, see Modeling and Visualizing multiple realizations.
A pre-requisite for using the Facies Modeling workflow is that you have upscaled your well log data to the resolution of the 3D grid, for which the Upscale Well Log tool is provided in the Tools section of the strip. The output of the tool is a grid property which you can then select as input to the Facies Modeling workflow. Note that all wells that were included during the upscaling process, will be included in the Facies Modeling workflow (you cannot exclude individual wells once they are part of the upscaled property).
The Facies Modeling workflow consists of the steps listed below.
Creating a facies model and assigning data
Applying trends and facies proportions