scholarly journals Mixed-Mechanism Stimulation Enabled Enhanced Geothermal Systems

2020 ◽  
Author(s):  
Thomas Kirchstetter
Keyword(s):  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Mixed Mechanism

Induced fault reactivation by thermal perturbation in enhanced geothermal systems

Geothermics ◽  
2020 ◽  
Vol 86 ◽  
pp. 101814 ◽  
Author(s):  
Quan Gan ◽  
Qinghua Lei
Keyword(s):  
Fault Reactivation ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Thermal Perturbation

scholarly journals Environmentally friendly, rheoreversible, hydraulic-fracturing fluids for enhanced geothermal systems

Geothermics ◽  
2015 ◽  
Vol 58 ◽  
pp. 22-31 ◽  
Author(s):  
Hongbo Shao ◽  
Senthil Kabilan ◽  
Sean Stephens ◽  
Niraj Suresh ◽  
Anthon N. Beck ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Environmentally Friendly ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Fracturing Fluids

scholarly journals Water Use in Enhanced Geothermal Systems (EGS): Geology of U.S. Stimulation Projects, Water Costs, and Alternative Water Source Policies

2014 ◽  
Author(s):  
C. B. Harto ◽  
J. N. Schroeder ◽  
R. M. Horner ◽  
T. L. Patton ◽  
L. A. Durham ◽  
...  
Keyword(s):  
Water Use ◽  
Water Source ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Alternative Water

scholarly journals Desert Peak East Enhanced Geothermal Systems (EGS) Project

2013 ◽  
Author(s):  
Ezra Zemach ◽  
Peter Drakos ◽  
Paul Spielman ◽  
John Akerley
Keyword(s):  
Enhanced Geothermal Systems ◽  
Geothermal Systems

scholarly journals Minimising the computational time of a waveform based location algorithm

2021 ◽  
Author(s):  
Emmanouil Parastatidis ◽  
Stella Pytharouli ◽  
Lina Stankovic ◽  
Vladimir Stankovic ◽  
Peidong Shi
Keyword(s):  
Computer Architecture ◽  
Time Window ◽  
Real Data ◽  
Computational Time ◽  
Enhanced Geothermal Systems ◽  
Geothermal Systems ◽  
Migration Method ◽  
Location Algorithm ◽  
Hypocentral Location ◽  
Grid Interval

<p>Accurate and fast localisation of microseismic events is a requirement for a number of applications, e.g. mining, enhanced geothermal systems. New methods for event localisation have been proposed over the last decades. The waveform-based methods are of the most recent developed ones and their main advantage is the ability to locate weak seismic events. Despite this, these methods are demanding in terms of computational time, making real-time seismic event localisation very difficult. In this work, we further develop a waveform-based method, the Multichannel coherency migration method (MCM), to improve the computational time. The computational time for the MCM algorithm has been reported to linearly depend on several parameters, such as the number of stations, the length of the waveform time window, the computer architecture, and the volume of the area we are searching for the hypocentre. To minimise the computational time we need to decrease one or more of the above parameters without compromising the accuracy of the result. We break the localisation procedure into several steps: (1) we locate the event with a relatively large spatial grid interval which will give less potential hypocentral locations and less calculations as a result. (2) Based on the results of step (1) and the locations of maximum coherencies we decrease the grid volume to a quarter of the original volume and the spatial interval to half the original, focusing only around the area identified in step (1). Step (2) is repeated several times for decreased grid volumes and spatial intervals until the hypocentral location does not significantly change any more. We tested this approach on both synthetic and real data. We find that while the accuracy of the hypocentre is not compromised, the computational time is up to  125,000 times shorter.    </p>

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