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The TOUGH2 (version 2) executables packaged with PetraSim include changes to the TOUGH2 source code available only with PetraSim. This includes the output of CSV files (used for results visualization within the interface) and a number of changes designed to improve geothermal models. There are detailed in this paper and include (but are not limited to) the following:

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.
Grouping of source/sink cells using source/sink names. This makes it possible to correctly assign production when multiple wells intersect the same cell.
Writing of SAVE file at specified time steps.
Additional results output in GOFT file for EOS2 and EWASG.
New capillary pressure and enthalpy options in EOS2 and EWASG.
Improved convergence during EOS2 change of phase.

Petrasim包含TOUGH2（v2）,
T2VOC,TMVOC和 TOUGHREACT（v1.2）执行文件。也支持TOUGH 2.1和TOUGHREACT 2.0，但是需要额外付费购买。此外，还支持HydrateResSim，必须从NETL获取，才能与PetraSim一起使用。PetraSim还包含了对TOUGHREACT v3.0和TOUGHREACT-Pitzer的部分支持。

PetraSim和仿真支持的应用包括
耦合过程建模（热、水、化工、机械、生物）
碳吸收和其他类型的注入
甲烷水合物分解与回收
核废物库的性能评估
地热储层研究
渗流区水文
挥发性**化合物的归宿和运移
实验室和现场实验设计和分析
3D建模
PetraSim全面支持3D建模。用户可以导入现有的3D层数据，并使用它来定义几何模型。用户可以将材质属性分配给层，并通过模型定义矿井。

3D Model Creation

PetraSim supports completely interactive 3D model creation. The user can import existing 3D layer data and use it to define the model geometry.

Users can assign material properties to the layers and define wells through the model.
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