... elastic stiffness rock mechanic simulation shear strength orientation fracture plane flow in porous media stiffness fracture stiffness matrix operation ARMA 24-0853 Evolution of hydraulic fracture permeability in EGS considering natural fracture compressibility and strength of the surrounding...

... = ωZ / κ dominates the wavefield evolution of a plane wave travelling through the heterogeneous fractured rock with less heterogeneous materials ( m = 10) or high heterogeneous fractures ( ῶ ≥ 1). Here, ω , Z , and κ are the angular frequency, seismic impedance, and fracture stiffness...

..., and temperature in P-wave signatures across single fluid-filled rock fractures. geologist hydraulic fracturing fracture plate tectonics reservoir geomechanics structural geology reservoir characterization fracture thickness propagation fracture stiffness coefficient reflection coefficient rock...

... reservoir fracture stiffness mud loss boundary condition leak-off coefficient drilling fluid formulation fracture face fracture ballooning fracture drilling fluid chemistry hydraulic fracturing Upstream Oil & Gas majidi deformation mud invasion leak-off value equation ARMA 19 1945...

... into the formation, qf , after shut-in equals the rate of shrinkage of total fracture volume, Vf, as pressure declines: = (2) Fracture stiffness, which is the reciprocal of fracture compliance, is defined as (Wang and Sharma 2017a; Wang et al. 2018): = (3) where is pressure inside fracture and is half of the total...

... uniform fracture stiffness across all fractures. A methodology is presented for inverting a source from the experiment. We find that the waveforms from the three models do not match each other. For propagation parallel to the fractures, the explicit model performs best with excellent agreement...

... & Gas compressibility fracture stiffness porosity reduction stiffness Barton mechanical aperture pressure depletion hydraulic aperture permeability aperture normal stress specimen stiffness characteristic fractured reservoir depletion prediction closure fracture ARMA 16-285...

... of the faults. Upstream Oil & Gas Rock mechanics complex reservoir calcium carbonate hydraulic fracturing fracture stiffness experiment solution 1 precipitate fracture amplitude stiffness international journal Reservoir Characterization precipitation co 2 State University solution 2...

.... The fracture stiffness differed among the fractures in the two sets and also differed from the stiffness of the intersections. Interpretation of the properties of fractures or fracture sets must consider the existence of non-uniform fracture stiffness within and among fracture sets, as well as consider...

...-modes are mainly affected by the fracture stiffness, signal frequency and fracture orientation with respect to the layering. From the experimental data, the apparent anisotropy was dominated by fractures at low stress because the energy was confined between the low stiffness fractures. At high stresses...

... that removes the first order effects of size and stress-dependence. We demonstrate this concept with a numerical investigation into the scaling of fracture stiffness with the size of the fracture and the normal stress state to which the fracture is exposed. We find that while the specific stiffness exhibits...

... waves. Shear and normal fracture stiffnesses were calculated using the displacement discontinuity theory. The stiffness ratio determined from the experiments was compared to a theoretical ratio that was determined assuming that the transmission of compressional and shear waves was equal...

... dependent, with the relaxation frequency at 10~20 Hz. This result, however, did not agree well with an analytical model which predicted much larger compliance changes and a higher relaxation frequency than the experiment. Observed normal to shear fracture stiffness ratio ranged from 1.8–2.8...

... invaded portions of the fracture that had a relatively low fracture stiffness and then spread to the regions with higher stiffness. In conclusion, the fluid front can be detected seismically and the spatial variation of fracture stiffness is correlated to the fluid flow path. 1. INTRODUCTION A goal...

... Upstream Oil & Gas fracture stiffness effective stress coefficient evolution stiffness flow in porous media fracture aperture dual permeability dual stiffness poromechanical response fracture interaction Fluid Dynamics coal permeability evolution matrix poromechanical effect...

... of a numerical investigation into the scaling of fracture stiffness with increasing fracture length. Using an efficient boundary element method we were able to simulate hundreds of virtual normal stress tests on entire fracture surfaces and on “sub-fractures” cut from them. In the paper we draw specific...

... of the converted wave generation can be understood as a superposition of the waves diffracted (and mode-converted) by these "scatterers" on the fracture. Reservoir Characterization Upstream Oil & Gas granite sample displacement fracture stiffness seismic wave normal stress rough fracture...

... that results in a discontinuity in the fracture stiffness at the interface between air and water. One-dimensional Fresnel diffraction calculations provide a basis to understand how the transmitted diffracted signals depend on the fracture specific stiffness and the frequency content of the signal. For the case...

... crystal. Interpretation of fracture properties from seismic measurements is affected by these two extrinsic length scales. Reservoir Characterization hydraulic fracturing Upstream Oil & Gas fracture stiffness seismic measurement transmission coefficient reactive flow diameter acoustic...

... scales of some of the key thermoporoelastic parameters such as the fracture stiffness required as input to the given analytical model. Experimental determination of these factors depends on the sensitivity achieved in measuring thermal strains for both saturated or unsaturated rock samples subject...