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1篇 您的检索式:作者名="Mike Trefry"
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1Deep Geothermal: The ‘Moon Landing' Mission in the Unconventional Energy and Minerals Space显示文摘Deep geothermal from the hot crystalline basement has remained an unsolved frontier for the geothermal industry for the past 30 years. This poses the challenge for developing a new unconventional geomechanics approach to stimulate such reservoirs. While a number of new unconventional brittle techniques are still available to improve stimulation on short time scales,the astonishing richness of failure modes of longer time scales in hot rocks has so far been overlooked. These failure modes represent a series of microscopic processes: brittle microfracturing prevails at low temperatures and fairly high deviatoric stresses,while upon increasing temperature and decreasing applied stress or longer time scales,the failure modes switch to transgranular and intergranular creep fractures. Accordingly,fluids play an active role and create their own pathways through facilitating shear localization by a process of time-dependent dissolution and precipitation creep,rather than being a passive constituent by simply following brittle fractures that are generated inside a shear zone caused by other localization mechanisms. We lay out a new theoretical approach for the design of new strategies to utilize,enhance and maintain the natural permeability in the deeper and hotter domain of geothermal reservoirs. The advantage of the approach is that,rather than engineering an entirely new EGS reservoir,we acknowledge a suite of creep-assisted geological processes that are driven by the current tectonic stress field. Such processes are particularly supported by higher temperatures potentially allowing in the future to target commercially viable combinations of temperatures and flow rates.Klaus Regenauer-Lieb Andrew Bunger Hui Tong Chua Arcady Dyskin Florian Fusseis Oliver Gaede Rob Jeffrey Ali Karrech Thomas Kohl Jie Liu Vladimir Lyakhovsky Elena Pasternak Robert Podgorney Thomas Poulet Sheik Rahman Christoph Schrank Mike Trefry Manolis Veveakis Bisheng Wu David A.Yuen Florian Wellmann Xi Zhang 2015Journal of Earth Science2015,26,1:0
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