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Gradation Design of Epoxy-Asphalt Mixtures for Steel Bridge Deck Pavements Optimized for Skid Resistance in Hot and Humid Climates. [PDF]

Polymers (Basel)
Du P, He Q, Han Z, Zhang Q, Xiong C, Zhang Y.   +5 more
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Drilling for hot dry rock reservoirs

Geothermics, 1987
Abstract The drilling group evaluated techniques suitable for drilling inclined boreholes, of controlled geometry, to reach temperatures of 200–250°C in crystalline rock. They concluded that there is no fundamental reason why holes for HDR projects cannot be drilled and completed successfully using techniques already available, and that further ...
AJ Beswick, G Baron, JD Garnish
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Geothermal reservoirs and hot dry rock systems

1999
Most geothermal reservoirs and hot dry rock (HDR) systems are located in fractured low porosity geological formations. In such settings, fractures provide conduits for fluid flow through such rocks. Therefore fractures, either natural or those artificially created, are important for the successful operation of geothermal reservoirs and HDR systems.
B. B. S. Singhal, R. P. Gupta
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The U.S. hot dry rock project

Geothermics, 1987
Abstract Early attempts to hydraulically fracture and connect two wells drilled at the Hot Dry Rock (HDR) site at Fenton Hill in New Mexico produced a large volume of fractured rock, but no connection. Microearthquakes triggered by fracturing indicated that the stimulated rock zones grew in unexpected directions.
John T Whetten, Bert R Dennis, Donald S Dreesen, Leigh S House, Hugh D Murphy, Bruce A Robinson, Morton C Smith   +6 more
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Effects of Thermal Stress in Hot Dry Rock Fracturing

SPE Drilling & Completion, 2022
Summary China has rich geothermal hot dry rock (HDR) resources, but the development and usage of its thermal energy are still at an early stage. At present, few studies have investigated the variation law for fracturing pressure on the borehole wall and fracture wall under the influence of thermal stress.
Tianyu Luo, Yuanshuang Liu
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Heat extraction from hot, dry, crustal rock

pure and applied geophysics, 1978
Natural heat stored in the earth’s interior represents an essentially inexhaustible energy supply which, at usefully high temperatures, is accessible at practical drilling depths from almost anywhere on the earth’s land surface. The problems of extracting and using this heat are those of engineering and economics, and can be expected to vary with the ...
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COMPLETION OF HOT DRY ROCK GEOTHERMAL WELL SYSTEMS

Proceedings of SPE Annual Technical Conference and Exhibition, 1979
Abstract In the hot dry rock (HDR) concept of extracting geothermal energy, as developed by the Los Alamos Scientific Laboratory (LASL), a manmade geothermal reservoir is created by drilling a deep hole into relatively impermeable hot rocks, creating a large surface area for heat transfer by hydraulic fracturing ...
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The status of hot dry rock as an energy source

Energy, 1992
Abstract Hot dry rock (HDR) is a deeply buried crustal rock at a usefully high temperature. Current engineering designs plan to tap its heat by drilling a wellbore, fracturing or stimulating pre-existing joints around the wellbore, and directionally drilling another wellbore through the fracture network.
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The Future of Hot Dry Rock Geothermal Energy

2012
As detailed in preceding chapters, the technical feasibility of HDR geothermal energy was clearly demonstrated at Fenton Hill, with the testing of two separate confined reservoirs. The major task now in view is moving this revolutionary new technology to its appropriate place in the world’s energy supply mix.
Donald W. Brown, David V. Duchane, Grant Heiken, Vivi Thomas Hriscu   +3 more
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Borehole measurements in the field of hot dry rock experiments

Geothermics, 1987
Abstract The logging group examined the value of different types of borehole logging in the context of HDR developments and considered the limitations of current techniques and the scope for further development. They recommended that the main development effort should concentrate on methods of fracture detection, both at the borehole wall and in the ...
R Haenel, RA Pearson, RJ Pine
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