The Volumetric Study workflow

With the Volumetric Study workflow in the study strip (study > Volumetrics > Volumetric Study) you can perform volumetric calculations for your reservoir (e.g., GRV, NRV, NPV, GIIP, etc). In order to use this workflow, you must have created a 'volumetric scenario' with the CONCEPT strip. You can run either a deterministic volumetric calculation, or a probabilistic volumetric estimate. In case of a fully deterministic volumetric calculation, your input consists of only one volumetric concept and the domain models assigned to that concept contain one unique value (the reference value) for each modeling parameter.

To each volumetric concept, you assign a specific set of domain models, which optionally contain quantified uncertainties for various modeling parameters in the form of probability density functions (PDFs) or a sampling seed. See List of uncertain parameters in the application for all parameters that can be included as uncertainty parameters in a probabilistic volumetric calculation. For each uncertainty parameter, you must indicate if it is an independent or correlated uncertainty. If a parameter is correlated, you must specify a 'parent' uncertainty parameter, and a correlation type. All these settings are done on the Uncertainty Parameter dialog, which is opened when you click on the frog legs () , located behind a parameter's entry field on the domain model form. You can create realizations for these uncertainty parameters by choosing from various sampling techniques provided by the workflow. When you have multiple volumetric concepts within a volumetric scenario, the concept probabilities can be incorporated in the volumetric calculation as well.

The Volumetric Study workflow guides you through the steps to run a volumetric calculation, from creating the study and assigning data to defining the sampling strategy and running the study. Additionally, controls are provided, such as selecting the reporting outputs (called 'observables') and the possibility to temporarily 'switch-off' uncertainty parameters to first analyze the impact of other uncertainty parameters. After completing the workflow, you can analyze the results from the volumetric study using the Analyze Results tool. The last step is to generate the volumetric report with the outcomes of all realizations.