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Title: Improved computational schemes for the numerical modeling of hydrothermal resources in Wyoming

Technical Report ·
DOI:https://doi.org/10.2172/5719617· OSTI ID:5719617

A new method, the Conjugate Gradient Squared (CGS) solution technique, is shown to be extremely effective when applied to the finite-difference solution of conductive and convective heat transfer in geologic systems. The CGS method is compared to the Successive Over/Under Relaxation schemes, a version of the Gaussian elimination method, and the Generalized Minimum Residual (GMRES) approach. The CGS procedure converges at least ten times faster than the nearest competitor. The model is applied to the Thermopolis hydrothermal system, located in northwestern Wyoming. Modeled results are compared with measured temperature-depth profiles and results from other studies. The temperature decrease from 72{degree}C to 54{degrees}C along the crest of the Thermopolis anticline is shown to result from cooling of the geothermal fluid as it moves to the southeast. Modeled results show correct general trends, however, a time-varying three-dimensional model will be needed to fully explain the effects of mixing within the aquifers along the crest of the anticline and thermal affects of surface surface topography. 29 refs., 18 figs., 2 tabs.

Research Organization:
Wyoming Univ., Laramie, WY (USA)
Sponsoring Organization:
USDOE; USDOE, Washington, DC (USA)
DOE Contract Number:
FG07-88ID12738
OSTI ID:
5719617
Report Number(s):
DOE/ID/12738-1; ON: DE91014823
Country of Publication:
United States
Language:
English