... owing to the relatively high water content due to its high porosity. Also, we observe a hysteresis of wave velocity related to the rocks’ temperature gradient during the freeze-thaw cycles. These findings provide new insights into rock dynamic responses related to temperature changes in the cryosphere...

..., and possibly the 7700 Levels were probably major contributors to the heat exchange process. Upstream Oil & Gas metals & mining Reservoir Characterization temperature gradient sanford underground research facility electrical conductivity water temperature water chemistry conductance...

... linked numerical simulators and analytical solutions to connect the evolving fluid properties and temperature with the changes in the stress field. 1. INTRODUCTION hydraulic fracturing temperature gradient reservoir geomechanics tensile fracture climate change Upstream Oil & Gas...

... the capacity to supply 10 percent of current national electricity consumption by 2050 (Giardini, 2009). Williams et.al (2008) showed that US can economically produce 100 GWe from the enhanced geothermal systems by 2050. hydraulic fracturing temperature gradient configuration Upstream Oil & Gas...

... to the classical approach based on normal compaction trends can be used, one of them being numerical modeling. Upstream Oil & Gas temperature gradient porosity reservoir geomechanics pore pressure History Artificial Intelligence trajectory compaction Reservoir Characterization depositional...

... mass. Initial data from two FROSTS installed on the 4100’-level of the Sanford Laboratory at Homestake show strain induced by the expansive grout curing during installation and a clear temperature gradient with depth into the rock mass. Therefore, FROSTS are a useful tool for measuring in situ strain...

... that have been used. Even though many methods have been developed and much data exists, there is need for additional work. Each method has specific attributes. A good design must consider a number of factors; magnitude of the thermal conductivity being measured, appropriate temperature gradient within...

... ABSTRACT : When underground openings are excavated in rock mass for storage of Liquefied Natural Gas, hereinafter referred to as L.N.G., as its temperature is -162°C, steep temperature gradients and thermal stress occur around the openings. That is, the plastic zone and cracks around...

...2&th U.S. Sympoalum on Rock Hechantce June 1983 PERMEABILITY AND PORE-FLUID CHEMISTRY OF THE BULLFROG TUFF IN A TEMPERATURE GRADIENT C. FDRROW D. MOORE J. BY' I T. U. S. Geological Survey _nlo Park, CA 94025 The permeability and fluid chemistry of the Bullfrog Tuff from the Nevada Test Site...

...INFLUENCE OF TEMPERATURE GRADIENT ON STEADY-STATE CREEP IN FREEZE SHAFT DESIGN Dr.-Ing. Joachim Klein, A.M. ASCE Bergbau-Forschung GmbH, Essen, West Germany 1. INTRODUCTION For deepening of mine shafts often ice- soil retaining structures in form of thick-walled cylinders are necessary. The design...

... production control Upstream Oil & Gas accuracy conductivity production monitoring insulation heater Reservoir Surveillance heat loss heat flow microconcrete Ashworth thermal conductivity simple apparatus similar poor conducting material production logging temperature gradient...

... and temperature gradient. The stress intensity fac- tors for the partially closed crack are also obtained in terms of these thermo-mechanical loads by modifica- tion of the McClin ock and Walsh concept for crack closing. An expression for permeability as a function of crack dimensions, pore pressure, in situ...

... seam and subjected to tectonic stress, overburden stress, internal pressure, and temperature gradient loading. NOMENCLATURE A = K/pc Thermal diffusivity E Elastic modulus K Thermal conductivity S Laplace transform variable T Time V Burn front velocity X Axial co-ordinate...

.... In the other, they are regarded as leftover and locked in from some previous state at which higher pressures prevailed. These two sources may both operate and they generally cannot be distinguished easily in the field. There are other complicating sources of stress such as temperature gradients and chemical...