Results 251 to 260 of about 11,077 (293)

Rivers under stress: geochemical changes along a rural-urban gradient during extreme hydrological events (Greve River, Italy). [PDF]

Environ Geochem Health
Ferrari M, Biagi R, Venturi S, Frezzi F, Tassi F.   +4 more
europepmc   +1 more source

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
europepmc   +1 more source

Constraints on the source of ions in the Jianhe hot springs in Guizhou Province, China by water-rock interaction experiments. [PDF]

PLoS One
Pu X, Zhou L, Chen Z, Zhou W.
europepmc   +1 more source

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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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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 ...
openaire   +1 more source