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Pore Structure and Damage Evaluation of Hot Dry Rocks in Enhanced Geothermal System by Combining Electrical Resistivity, Ultrasonic Waves and Nuclear Magnetic Resonance
A liquid nitrogen cold-shock fracturing method is proposed to resolve the problem of single heat-exchange cracks generated by hydraulic fracturing in...
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Slake Durability of Granitic Rocks in Wet and Dry Conditions
Weathering processes due to heating and cooling, wetting and drying cycles, salt decay, and acidic rains (atmospheric pollution) can affect the...
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Optimized geothermal energy extraction from hot dry rocks using a horizontal well with different exploitation schemes
In the foreseeable future, the geothermal exploitation from hot dry rocks (HDR) using a horizontal well will bear potential. Thus, in-depth studies...
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Structural controlling conditions for dry hot rock reservoirs in the middle section of the northern margin in the North China Block
According to a comprehensive analysis of regional geology–geophysics, this article focuses on structural conditions for dry hot rocks in the middle...
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Study on the Characteristics of Fracturing Fracture Propagation and Turning in Carbonate Dry Hot Rock
Thermal reservoir stimulation is a necessary means to achieve effective development of dry hot rocks. Carbonate rock is a typical type of dry hot...
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Laboratory Investigation of Cryogenic Fracturing Effect of Hot Dry Rock Wellbores Under Triaxial-Confining Stresses
Hot dry rock (HDR) contains abundant thermal energy, which can be extracted through fracturing and used for electricity generation. Due to its deep...
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Hydrogeochemical evidence for the geothermal origin of sedimentary hot dry rock in Gonghe Basin, Northwest China
Geothermal energy resources are abundant in the Qinghai Gonghe Basin. Helium isotope evidence indicates that the heat source of the high-temperature...
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Study on Fracture Surface Damage and Fluid Flow Characteristics of Hot Dry Rock with Different Failure Modes under Repeated Thermal Shock
In the process of geothermal energy exploitation, the fracture surface of hot dry rocks (HDRs) is easily damaged by repeated injection of cold water....
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Evolution of Elastic–Plastic Characteristics of Rocks Within Middle-Deep Geothermal Reservoirs Under High Temperature
Middle-deep geothermal reservoirs, rich in energy, experience deep burial, high temperature, and intense three-dimensional stresses, causing...
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Experimental Investigation of Mechanical Properties and Failure Behavior of Fluid-Saturated Hot Dry Rocks
Thousands of cubic meters of fluid are continuously injected for a long term to create complex fracture patterns in hydraulic fracturing of hot dry...
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Metamorphism of Mafic Rocks
Metamorphic mafic rocks (e.g. mafic schist or greenschist and mafic gneiss, amphibolite, mafic granulite) are derived from mafic igneous rocks,...
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Metamorphism of Ultramafic Rocks
Ultramafic rocks are magnesium silicate rocks that normally contain no felsic minerals or very little (<10 vol%).
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The effects of some environmental conditions on the mode I fracture toughness of rocks
Fracture toughness is an important parameter in determining the fracture mechanism of rocks, concretes and other composites, and it is used in...
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Metamorphism of Pelitic Rocks (Metapelites)
Metapelites are probably the most distinguished family of metamorphic rocks. Typical examples include characteristic rocks and minerals such as...
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Novel Damage Quantification Techniques for Thermal-Treated Granitic Rocks
Analyzing the response of thermally treated granitic rocks is crucial for enhanced geothermal systems (EGS), nuclear waste disposal in deep...
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Element Geochemical Characteristics of Sedimentary Rocks and Its Geological Significance from the Upper Permian Linxi Formation in the Songliao Basin
The Permian Linxi Formation of Well Mg1 in Songliao Basin revealed a set of gray and black mudstone deposits. In order to solve the sedimentary...
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Crater-rim collapse at Stromboli volcano: understanding the mechanisms leading from the failure of hot rocks to the development of glowing avalanches
The failures of volcanic crater-rims frequently lead to the development of avalanches of glowing rocks, a hybrid phenomenon between rock avalanches...
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Hot Spots
Although the vast majority of volcanoes on Earth are related to plate boundaries-mid-ocean ridges and subduction zones, approximately 5% are...
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Evolution of Freeze–Thaw Damage Characteristics and Corresponding Models of Intact and Fractured Rocks Under Uniaxial Compression
The freeze–thaw (FT) cycle will lead to rock damage and cause hidden danger to the safety of rock engineering. In order to explore the FT damage...
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An overview of the engineering properties of Cenozoic sedimentary rocks in Oman
In Oman, sedimentary rock formations of the Cenozoic age (Palaeogene and Neogene) occupy much of the ground onto which foundations are laid. These...
