... ABSTRACT: Epidote and chlorite are both low-grade metamorphic minerals that are widely distributed in deep granite geothermal reservoirs. Hot fluid circulation promotes the precipitation of epidote and chlorite coatings on natural faults and fractures and this can in turn exert control...

... on simulated fault gouges at confining stresses of 110 MPa, temperatures of 100-250 °C and fluid pressures of 21-80 MPa. These experimental conditions are representative of deep geothermal reservoirs and allow the influence of variations in temperature and effective stress to be explored on the nucleation...

... simulation coefficient reservoir geomechanics permeability propagation contribution wang geothermal reservoir journal geology complex reservoir reservoir characterization fracture propagation zhang numerical simulation research fracture hydraulic fracturing geological subdiscipline hdr...

... ABSTRACT: This study investigates the thermal–mechanical behavior of slates in geothermal reservoirs and establishes an anisotropic thermal–mechanical coupling failure criterion. Slate samples obtained from a geothermal site were subjected to a series of direct-shear and triaxial-compression...

... in the Mesozoic-Cenozoic basins in eastern China. However, they are dominated by medium-temperature geothermal resources with low abundance. The geothermal reservoir types mainly include porous sandstone reservoirs, karstified fractured-vuggy carbonate reservoirs, and fissured granite reservoirs. 1...

... reservoir sandstone reservoir geothermal reservoir divalent ion china experiment geothermal sandstone reservoir ARMA 24 0206 Uncovering the influence of divalent ions on the reinjection of deep geothermal sandstone reservoirs: A case from Guanzhong Basin in China Wentong Zhang1,2, Hai Huang2...

... value P crit using first-order estimates for failure on small slip patches in a normal-fault zone. 1. INTRODUCTION Extraction of heat from geothermal reservoirs requires a working fluid circulating in hot rock. Efficiently managing the resource must consider how fundamental physical variables...

... interaction between the cold injected fluids and the hot rocks in EGS can alter the mechanical properties of geothermal reservoirs (especially in EGS) which could affect the efficiency of heat exploitation. Hence, the mechanical properties of geothermal resources at certain conditions are important to better...

... the anisotropic coupled hydro-mechanical behavior of slate geothermal reservoirs. INTRODUCTION Taiwan is located in the active plate with complex volcanic activities forming different foliated metamorphic rocks such as slate and schist. The strata also have a high potential for the development of geothermal...

... geothermal energy sources. Water from surface seeps through faults and cracks of earth and is warmed by hot rocks or water is trapped by impermeable layers to create geothermal reservoirs. Sedimentary basins have great geologic and reservoir properties for low-cost energy generation for geothermal energy...

..., transient cooling-induced permeability enhancement as a distinctive mechanism for induced seismicity in geothermal reservoirs was investigated. A 3D coupled THM model was developed to model the colder fluids re-injection process over a 1-year period and evaluate the potential for induced seismicity...

... (Jacobson et al., 2018; Teske, 2019). EGS are advanced geothermal reservoirs independent of the availability of an apriori minimal permeability field by generating/re-opening new/existing fractures through hydraulic or supercritical carbon dioxide (scCO 2 ) fracturing at depths between 3 km and 10 km below...

... ABSTRACT: Geothermal reservoirs are usually deep and have low permeability. Hydraulic fracturing stimulation of the production and injection wells can help increase the heat extraction from these reservoirs. However, injecting cold fluid in the hot formation can cause considerable volumetric...

... to study the heat extraction mechanism of fluid in fracture network. hydraulic fracture hdr basin hydro modeling & simulation fracture boundary extraction heat extraction performance enhanced geothermal system energy zhang geothermal reservoir coefficient china conductivity...

.... The obtained results have shown that by engineering proper cement solutions, the risks of casing failure in geothermal wells can be minimized to sustainably harvesting green power from superhot geothermal reservoirs. 1. INTRODUCTION To answer the growing need for energy and at the same time fighting...

... how to establish an efficient EGS. In this paper, based on meso damage mechanics, elastic thermodynamics and Biot’s classical seepage mechanics, a thermo-hydro-mechanical-damage (THMD) coupling model of hydraulic fracturing in geothermal reservoir with randomly distributed NFs is established...

... productivity of an EGS is controlled by the temporal evolution of induced fractures in geothermal reservoirs because the fracture network is the path by which heat (resource) is extracted from the subsurface. Therefore, it is essential to monitor the variation in fracture network characteristics over time...

... neural network enhanced recovery machine learning variation viscosity efficiency asia government song china government production monitoring injection wellhead geothermal reservoir wang equation extraction investigation energy boundary breakthrough exploitation efficiency ARMA 22...

... optimization injection simulation-based pattern optimization geothermal reservoir journal wellhead ARMA 22 2321 Simulation-Based Patterns Optimization of Enhanced Geothermal Systems Porlles, J.W. Department of Petroleum Engineering, University of North Dakota, Grand Forks, ND, USA Jabbari, H...

... and evaluating the THM properties of a thermal cracking zone surrounding a wellbore and hydraulic fracture are extremely important for thermal energy extraction and heat exchange efficiency in the EGS. lastly, to predict the thermal fracture propagation in a fractured deep geothermal reservoir, THM perturbations...