As you know, DeepSim is a compositional reservoir simulator. This means that oil and gas properties are modeled using one or multiple components that have predefined behavior. This is the most advanced method of modeling oil and gas PVT properties in a reservoir simulation study.
Up until the 2018.3 version of DeepSim, DeepSim’s user-interface only allowed you to pick your PVT components from a predefined list. The provided list of components was sufficient for rough modeling of various light oils, but to model selected properties, specifically tuned (psuedo) components are necessary that allow the most accurate approximation the fluids being studied.
In the 2018.3 version of DeepSim, you can now create your own PVT components. you can freely specify phase behavior, density and viscosity behavior by entering parameters in industry standard correlations. With this new functionality, you can replicate advanced PVT behavior in models such would be required for heavy oil and bitumen modeling, volatile oil and rich condensate gas behavior modeling. The new 2018.3 version of DeepSim is currently undergoing testing, and should be available soon from the Google Play store. For those that have already installed DeepSim on their devices, the 2018.3 version should automatically be installed via the Google Play store. For those that have not installed DeepSim yet, you can obtain it by following this link or clicking on the Play store logo on this page.
In the remainder of this page, we will give a brief tour of DeepSim’s new custom component features.
To create a new custom PVT component, go to the Setup -> PVT menu. The new PVT menu, will display not only the standard built-in component, but the new custom components as well. To create a new component, press the ‘Add new component’ button’.
This will bring you to the Edit Component menu. The first thing to do is to give the component a new name, and supply basic data, such as molecular weight, and critical properties. These properties will be used to calculate the components gas phase density.
The gas-oil k-values for a given component can be edited in the Gas k-values tab. By supplying the kv1, kv4, and kv5 parameters, gas-oil k-value can be calculated (see The Properties of Gases
and Liquids”, third edition, R.C. Reid, J.M. Prausnitz and T.K Sherwood, McGraw-Hill, Inc., 1977). In subsequent versions of DeepSim we will also offer the functionality to directly estimate the kv1-kv5 parameter directy from an EOS.
Liquid phase densities can be entered using a simple linear correlation, see below.
And finally, the new component’s viscosity properties can be entered using the viscosity tab:
Once the component is defined, is can be set in the initial oil, gas and water compositions, just like the built-in components. New custom components can also be used to in the injection composition of injector wells, for more EOR functionality.
With this new functionality, DeepSim’s PVT functionality now rival’s existing (far more expansive) industry standard software. We hope you will enjoy the new functionality.