... nanoindentation elasticity tensor geological subdiscipline anisotropy crack density fort simpson shale rouainia pyrite rock type well logging reservoir characterization matrix homogenization model prediction university thomsen anisotropy parameter organic matter ARMA 23 0420 Stochastic...

... reservoir geomechanics target temperature valdieri porosity wellbore integrity crack density physical property marble rock reservoir characterization upstream oil & gas correlation marble vinciguerra degradation characteristic wellbore design experimental study granite...

... Upstream Oil & Gas shear wave response Reservoir Characterization crack density damani microseismic event polarization wave travel time shear velocity shear wave travel time secondary fracture main fracture transducer shear wave velocity fracture propagation propagation fracture...

... were interpreted by manual grain tracing and image processing to obtain digital phase and crack maps. Digitization of the sandstone microstructure in this way yields data on grain mineralogy, shape, (contact) size and orientation, as well as on coordination number and crack density and orientation. We...

... should be included in the simulations for their stability assessments. complex reservoir Engineering hydraulic fracturing element method crack density fracture strength microcrack fracture network Upstream Oil & Gas strength heterogeneity hydraulically crack tip spatial mesh...

... crack density ratio G was obtained. (Figure in full paper) The above graph showed the displacement curves, which were elastic and considering crack propagation respectively. The max displacement was 58mm from this graph. This value was very close to the monitoring value, which was 50mm[7]. So...

... the overall results from the tree types of measurements (seismic velocity, fracture toughness, and tensile strength) are quite complicated, they can be at least partially explained by considering three types of crack density changes: a small decrease in crack density (crack healing), a small increase in crack...

... and andesite. It was shown that the crack growth behaviors in granite were anisotropic. When the crack propagates parallel to the plane in which the crack density of the pre-existing cracks was the highest, the crack velocity was the highest under the same water vapor pressure. Hence, it can be concluded...

.... These changes can be explained by the fact that deformation of cracks induced by UCT increases space to contain more water. Results of permeability tests for the deformed specimens are applicable to low permeable and impermeable class. Relationship of crack length and difference of crack density...

... INTRODUCTION ABSTRACT: This paper examines the effect of the initial crack density on the strength of coarse and free grain Yuen Long marbles. Two different mechanisms of microcracking are observed: (1) in fine grain marbles the uniaxial strength drops with both initial crack density s o...

... of the microscope, cracks of the four types were counted separately and their angles of inclination to the direction of ó were measured. In order to understand the variation of crack density with the distance from the main fracture, microcrack counting was also performed in three consecutive fields of view which...

... drillstring design Upstream Oil & Gas Artificial Intelligence crack-normal stress nucleation Reservoir Characterization hydraulic fracturing fault nucleation mechanism microcrack damage stress field crack density experiment Westerly granite loading shear fracture fracture front fracture...

... of the number of active cracks per unit volume to the total number of pos- sible cracks per unit volume. In the damage model, this is inter- preted as the current crack density divided by the maximum possible crack density of 9/16 (this maximum was derived by Budiansky and O'Connell, 1976): (mathematical...

... or 3. From the crack maps it is apparent that this rock fails through the development of microcrack arrays, which propagate in shear mode, preferentially along the compromise grain boundaries formed by impingement of quartz cement overgrowths. Reservoir Characterization crack density...

... NR 3 (where the summation Z is z over the total crack density, N, and crack size, R), and Tf(=T13) is a proportionality constant such that the value of a fragment is T ¾3R 3. Relation (5) for spallation is used to statistically describe fragmentation and separation in a computational cell. (NAG-FRAG...

... Oil & Gas variation experiment tensile stress fragmentation shale gas Fluid Dynamics final report laboratory pulse shape seaman complex reservoir calculation input stress pulse shape curran oil shale hydraulic fracturing crack density borehole Devonian shale loading shockey...

... suggests that the total overall average incremental strain consists of three components during regions 1 and 2 deformation; 5, 8 namely. dry brittle rock frictional solid friction attenuation scheme Reservoir Characterization wave motion crack density energy dissipation reservoir...