Geologic Model/Mesh Creation
PetraSim includes tools to represent geological formations and faults in a conceptual model independent of the model mesh. The conceptual model can be created based on xyz surfaces exported from other modeling programs such as RockWorks or Surfer, or based on a GRDECL file exported from Petrel or other modeling packages.
Create natural state model using fixed temperature or pressure boundary conditions, flow rate or flux-based sinks and sources and a variety of initial condition options.
Once a natural state model is produced, create historical and predictive models by incorporating deviated production and injection wells that can be easily enabled and disabled.
PetraSim 2017 has added several new features that give improved support for geothermal simulations. These include updates to the TOUGH2 simulator to support updated steam tables, improved well boundary conditions, and more.
- Specify the start-up time for a well on deliverability. This avoids the need for multiple restarts when modeling a number of make-up wells in field-scale geothermal production forecast.
- Specify the productivity index (PI) and flowing pressures for each layer of a well on deliverability.
- IAPWS-IF97 correlations for pure water added to the standard TOUGH2 EOSs. These extend the use of TOUGH2 to near-critical conditions (T>350°C) and to geothermal geopressured conditions (P>1000 bara).
- IAPWS 2008 viscosity formulation for pure water and steam added to the standard TOUGH2 EOSs.
For a detailed list of changes, please see the PetraSim Release Notes.
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