In this work, stress-dependent absolute and relative permeabilites in porous media are studied using the discrete element method lattice Boltzmann method. The change of permeability porosity during compaction is found follow a power-law relation. homogeneous pack agreement with prediction Carman-Kozeny equation. Porosity exponent increased due to existence vugs but decreased fractures. Relative...

The generalized radial flow (GRF) model in well-test analysis employs noninteger dimensions to represent the variation area with respect distance from a borehole. However, dimension is influenced not only by changes area, but also permeability variations medium. In this report, combined effect of dimensionality and permeability/conductance interpreted referred as apparent (AFD). AFD determined ...

The contour method of residual stress measurement has recently been adapted to measure fractured, rather than cut specimens. The fracture contour method was capable of determining normal residual stresses acting prior to the planestrain failure of a large aluminium alloy forging, but shear residual stresses could not be measured (Prime et al., 2014, Eng. Fract. Mech., 116, 158-171). We demonstr...

Geoscientists from the Coso Operating Company, EGI-Utah, GeoMechanics International, and the U.S. Geological Survey are cooperating in a multi-year study to develop an Enhanced Geothermal System (EGS) in the Coso Geothermal Field. Key to the creation of an EGS is an understanding of the relationship among natural fracture distribution, fluid flow, and the ambient tectonic stresses that exist wi...

The models of stress corrosion and pressure solution established by Yasuhara et al. were introduced into the 2D FEM code of thermo-hydro-mechanical-migratory coupling analysis for dualporosity medium developed by the authors. Aiming at a hypothetical model for geological disposal of nuclear waste in an unsaturated rock mass fromwhich there is a nuclide leak, two computation conditions were desi...

Detailed and preliminary field investigations delineating the most recent fault ruptures in vicinity of the Dixie Valley, Beowawe, and Bradys geothermal fields allow an assessment of static stress changes and their possible influences on the geothermal environments. Our models for the Dixie Valley and Beowawe regions show increased failure stress on faults and fractures associated with the geot...

OBJECTIVES S1P acts via the S1PR family of G protein-coupled receptors to regulate a variety of physiological responses. Whereas S1P1R activates G(i)- and PI-3-kinase-dependent signals to inhibit vascular permeability, the related S1P2R inhibits the PI-3-kinase pathway by coupling to the Rho-dependent activation of the PTEN phosphatase. However, cellular consequences of S1P2R signaling in the v...

Response characteristics of key strata during the periodic weighting process in Dongjiahe coal mine were investigated using micro-seismic (MS) monitoring. Fracture types identified through moment tensor inversion. Finally, fracture mechanism roof was revealed from a microscopic viewpoint. The results show that there are three concentrations MS events distributed along dip direction. And two eve...