scholarly journals Final Report to DOE EERE – Geothermal Technologies Program Project Title: Monitoring and modeling of fluid flow in a developing enhanced geothermal system (EGS) reservoir

2017 ◽  
Author(s):  
Michael Fehler
Keyword(s):  
Fluid Flow ◽  
Geothermal System ◽  
Final Report ◽  
Enhanced Geothermal System ◽  
Project Title

Study on wellbore fluid flow and heat transfer of a multilateral-well CO2 enhanced geothermal system

2019 ◽  
Vol 249 ◽  
pp. 14-27 ◽  
Author(s):  
Yu Shi ◽  
Xianzhi Song ◽  
Gaosheng Wang ◽  
John McLennan ◽  
Bryan Forbes ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Geothermal System ◽  
Enhanced Geothermal System ◽  
Flow And Heat Transfer

scholarly journals The Northwest Geysers Enhanced Geothermal System Demonstration Project, The Geysers, California. Final Report

2019 ◽  
Author(s):  
Craig Hartline ◽  
Mark Walters ◽  
Melinda Wright ◽  
Chakra Rawal ◽  
Julio Garcia ◽  
...  
Keyword(s):  
Demonstration Project ◽  
Geothermal System ◽  
Final Report ◽  
Enhanced Geothermal System ◽  
The Geysers

scholarly journals Use of Mohr Diagrams to Predict Fracturing in a Potential Geothermal Reservoir

Geosciences ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 501
Author(s):  
D.C.P. Peacock ◽  
David J. Sanderson ◽  
Bernd Leiss
Keyword(s):  
Mechanical Properties ◽  
Fluid Flow ◽  
Geothermal Reservoir ◽  
Rock Properties ◽  
Geothermal System ◽  
Enhanced Geothermal System ◽  
Mechanical Modelling ◽  
Different Types ◽  
Stimulation Of

Inferences have to be made about likely structures and their effects on fluid flow in a geothermal reservoir at the pre-drilling stage. Simple mechanical modelling, using reasonable ranges of values for rock properties, stresses and fluid pressures, is used here to predict the range of possible structures that are likely to exist in the sub-surface and that may be generated during stimulation of a potential geothermal reservoir. In particular, Mohr diagrams are used to show under what fluid pressures and stresses different types and orientations of fractures are likely to be reactivated or generated. The approach enables the effects of parameters to be modelled individually, and for the types and orientations of fractures to be considered. This modelling is useful for helping geoscientists consider, model, and predict the ranges of mechanical properties of rock, stresses, fluid pressures, and the resultant fractures that are likely to occur in the sub-surface. Here, the modelling is applied to folded and thrusted greywackes and slates, which are planned to be developed as an Enhanced Geothermal System beneath Göttingen.

scholarly journals Performance of Hybrid Single Well Enhanced Geothermal System and Solar Energy for Buildings Heating

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2473
Author(s):  
Yujiang He ◽  
Xianbiao Bu
Keyword(s):  
Solar Energy ◽  
Service Life ◽  
Heating System ◽  
Hydrothermal Systems ◽  
Geothermal System ◽  
Heat Output ◽  
Enhanced Geothermal System ◽  
Geothermal Heat ◽  
Hybrid Heating ◽  
Single Well

The energy reserves in hot dry rock and hydrothermal systems are abundant in China, however, the developed resources are far below the potential estimates due to immature technology of enhanced geothermal system (EGS) and scattered resources of hydrothermal systems. To circumvent these problems and reduce the thermal resistance of rocks, here a shallow depth enhanced geothermal system (SDEGS) is proposed, which can be implemented by fracturing the hydrothermal system. We find that, the service life for SDEGS is 14 years with heat output of 4521.1 kW. To extend service life, the hybrid SDEGS and solar energy heating system is proposed with 10,000 m2 solar collectors installed to store heat into geothermal reservoir. The service life of the hybrid heating system is 35 years with geothermal heat output of 4653.78 kW. The novelty of the present work is that the hybrid heating system can solve the unstable and discontinuous problems of solar energy without building additional back-up sources or seasonal storage equipment, and the geothermal thermal output can be adjusted easily to meet the demand of building thermal loads varying with outside temperature.

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