Numerical Simulation of Geothermal Energy Productivity Considering the Evolution of Permeability in Various Fractures

2021 ◽  
pp. 117756
Author(s):  
Tiankui Guo ◽  
Yuelong Zhang ◽  
Wei Zhang ◽  
Baolun Niu ◽  
Jiayuan He ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Geothermal Energy ◽  
Energy Productivity

Numerical simulation of snow melting using geothermal energy assisted by heat storage during seasons

2011 ◽  
Vol 42 (8) ◽  
pp. 724-744 ◽  
Author(s):  
Niro Nagai ◽  
Shigenobu Miyamoto ◽  
Yoshikazu Osawa ◽  
Syunsuke Igarashi ◽  
Kazuo Shibata ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Geothermal Energy ◽  
Heat Storage ◽  
Snow Melting

scholarly journals Numerical Simulation of Snow Melting using Geothermal Energy Assisted by Heat Storage during Seasons(Thermal Engineering)

2010 ◽  
Vol 76 (767) ◽  
pp. 1090-1101
Author(s):  
Niro NAGAI ◽  
Shigenobu MIYAMOTO ◽  
Yoshikazu OSAWA ◽  
Syunsuke IGARASHI ◽  
Kazuo SHIBATA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Geothermal Energy ◽  
Heat Storage ◽  
Thermal Engineering ◽  
Snow Melting

scholarly journals Flowback Test Analyses at the Utah Frontier Observatory for Research in Geothermal Energy (FORGE) Site

2021 ◽  
Author(s):  
Pengju Xing ◽  
Branko Damjanac ◽  
Joseph Moore ◽  
John McLennan
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Numerical Model ◽  
Lower Bound ◽  
Hydraulic Fracture ◽  
Geothermal Energy ◽  
Closure Stress ◽  
Minimum Principal Stress ◽  
Stress Formation ◽  
Reduced Time

AbstractIn 2017 and 2019, injection testing was carried out in three zones in a vertical well in granite at the Frontier Observatory for Research in Geothermal Energy site near Milford, Utah, USA. In several injection cycles, flowback was implemented rather than shut-in. The goal was to explore an alternative to prolonged shut-in periods for inferring closure stress, formation compressibility, and formation permeability (permeability thickness product). The flowback procedures involved a cyclic flowback/shut-in, while pressure decreased. The flowback data are presented, and analyses are shown. The inferred closure stress(es) from flowback analyses are lower than for equivalent injection cycles that were strictly shut-in. Relatively high formation compressibility obtained from the flowback analyses indicates an extensive, fractured system. This study also includes numerical simulation of the flowback events. The numerical model shows that the rebound pressure is not necessarily the lower bound of the minimum principal stress. The signature of stiffness change can be identified as the process when the depletion mainly transitions from hydraulic fracture to natural fractures from numerical analysis. Overall, flowback potentially has advantages over shut-in because of the reduced time to closure.

scholarly journals Numerical simulation of geothermal energy from dry hot rocks with gravity heat pipe

2021 ◽  
Vol 647 ◽  
pp. 012124
Author(s):  
Yapin Zhang ◽  
Zhiyin He ◽  
Fangfang Qu ◽  
Dejia He ◽  
Haohao Hao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Heat Pipe ◽  
Geothermal Energy
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