Approaches to Local Grid Refinement in TOUGH2 Models


Adrian E. Croucher and Michael J. OíSullivan

Key Words:

Reservoir modelling, TOUGH2, grid refinement


New Zealand Geothermal Workshop





File Size:

590 KB

View File:


In many applications, local refinement of a TOUGH2 model grid is needed where smaller-scale details of the model behaviour must be resolved- for example, around production areas (or even individual wells) in a geothermal field. Because of its flexibility, TOUGH2 makes a range of approaches to local grid refinement possible. TOUGH2ís numerical formulation does implicitly require that the connection faces between grid blocks are orthogonal to the lines joining the block centres. However, not all approaches to local grid refinement satisfy this requirement. This paper surveys the available approaches to horizontal local grid refinement of TOUGH2 models, considering the merits and disadvantages of each with reference to model performance on a test problem. A new approach is also introduced, incorporating a non-linear optimization technique for ensuring maximum compliance with TOUGH2ís orthogonality requirement.

ec2-3-238-72-122.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 2013, University of Auckland: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.

Accessed by: ec2-3-238-72-122.compute-1.amazonaws.com (
Accessed: Wednesday 18th of May 2022 03:09:50 AM