... Upstream Oil & Gas majidi equation mud invasion leak-off value Artificial Intelligence complex reservoir fracture stiffness drilling fluid property boundary condition drilling fluid formulation leak-off coefficient fracture face deformation fracture ballooning fracture 1. INTRODUCTION...

... stress pressure decline complex reservoir natural fracture hydraulic connectivity variable compliance method tangent line method fracture complex fracture geometry fracture geometry hydraulic fracturing fracture stiffness MPa hydraulic fracture permeability 1. INTRODUCTION Diagnostic...

... 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...

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... aperture Modeling & Simulation compressibility mechanical aperture pressure depletion prediction closure fracture stiffness porosity reduction normal stress specimen stiffness characteristic fractured reservoir hydraulic aperture permeability stiffness fracture 1. INTRODUCTION Many...

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...-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...

... 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...

... 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...

... using a measure of fracture stiffness (or its inverse, compliance). In this paper we explore how two different measures of fracture stiffness are influenced by fracture size and in situ stress. It is non-trivial to determine the appropriate measure to consider when describing the scaling of fracture...

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... 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...

... to the field scale. We will discuss results of an investigation into the scaling of fracture stiffness with fracture dimension. This study considered a set of statistically identical "parent" fractures with smaller fractures being generated by cutting sub-fractures from the parents. The smallest subfractures...

... 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 fracture stiffness experiment displacement rough fracture Upstream Oil & Gas loading granite sample normal stress...

... 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. Upstream Oil & Gas reactive flow fracture specific stiffness fracture stiffness diameter Reservoir Characterization seismic measurement control sample...

... 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...

... represents mechanisms of hydraulic conductivity enhancement, caused by deformation, through use of a modulus reduction ratio, Pa. The modulus reduction ratio, Rm, is incorporated in the expression for hydraulic conductivity to account for the influence of fracture aperture and spacing, fracture stiffness...

... with direct observations on a synthetic fracture in the laboratory. Reservoir Characterization displacement elastic interface wave fracture specific stiffness stiffness orientation phase velocity specimen fracture aluminum specimen fracture stiffness shear wave interface wave Upstream Oil...

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