... geological subdiscipline pore pressure aspect ratio crack aspect ratio elastic property mudstone bedding intrinsic anisotropy shale intrinsic anisotropy situ crack density stress field shale fracture equivalent medium theory Analysis of the influence of bedding-parallel cracks on shale...

... attempt to accomplish this task by devising an algorithm to predict from sonic logs the secondary porosity formed by vugs and micro-fractures as well as their pore aspect ratios or pore space. The pore aspect ratios are categorized into intervals of permeable and low permeability in the aquifer...

... Subsurface rocks contain pores and cracks with various sizes. The cracked porous medium elastic wave theory describes wave propagation characteristics due to the pore-crack interaction in rocks. The theory was extended to multiple cracks of different aspect ratios and applied to model P- and S...

... structure parameter γ is related to a grain size index (D), in addition to aspect ratio. The gradient of velocity change with pressure is controlled by the initial aspect ratio of the rock. As pressure increases, aspect ratio increases and γ decreases so that wave velocity increases. For different rocks...

.... The letters along the core section represent the aspect ratio. In carbonate rocks, the moldic pores represent thin sections that shown in (b). the dissolution of carbonate constituents and infrafossil pore space. The interparticle pores represent pores between grains Facies classification using supervised...

... and is similarly assumed to be ellipsoidal. Due to compaction, the spacing of clay platelets perpendicular to their long axis is typically less than their spacing parallel to it. Hence, the aspect ratio of the pair distribution function is less than that of the clay platelets. This paper examines the impact...

...Petrophysical AVO inversion based on the Xu-White model with spatially-varying pore aspect ratio Qiang Guo*, Tao Shen, Yiqian Tian, College of Information Engineering, China Jiliang University Summary and such pore type variation can be described by the pore aspect ratio (the minor to major axes...

... such as spheroids with small aspect ratios have been used to mimic cracks. However, when these pores are dry it has been shown that they all exhibit the same normal-to-shear compliance ratio ( B n / B t ) – regardless of aspect ratio ( α ) – and therefore impact the bulk and shear moduli in a predetermined...

... to compare the influences of microcracks distribution on the attenuation signatures. The crack density Permeability (mD) 10 is set as the constant of 0.05. Scenario 1 is assumed to have a single set of cracks with aspect ratio of 0.0005. The Porosity 0.2 unimodal and bimodal distributions of crack aspect...

..., the principal strain tensor is used to describe porosity and pore aspect ratio with the assumption of incompressible grains. Second, each transversely isotropic (TI) elastic stiffness matrix is computed relative to the axis of symmetry. This results in a cross-section populated with tilted TI elastic properties...

... Start Time: 8:30 AM Presentation Start Time: 8:55 AM Location: 305 Presentation Type: Oral thomsen parameter fracture upstream oil & gas aspect ratio crack density seg international exposition frequency limit hudson reservoir characterization effective stress annual meeting...

... Type: Oral poisson mutriba field aspect ratio reservoir characterization simultaneous inversion log analysis najmah formation higher poisson annual meeting brittleness index angle stack amplitude well logging upstream oil & gas fracture density kuwait porosity impedance...

... intelligence machine learning rock skeleton china univercity zhang shear modulus aspect ratio upstream oil & gas rock physics model tight sandstone xianggang fan Avseth , P. , T. , Mukerji , and G. , Mavko , 2010 , Quantitative seismic interpretation: Applying rock...

... based on the mercury intrusion fractal curve.. It is found that the control action of pore structure type on the variation law of longitudinal and transverse wave velocity is mainly affected by the aspect ratio of pores; the effect of pore structure type on resistivity change is mainly affected by pore...

... anisotropic parameter depth trend anisotropy parameter orientation effective stiffness aspect ratio grid search seg international exposition rock physics modeling equation shale anisotropy input parameter reservoir characterization anisotropy modeling stiffness upstream oil & gas porosity...

... log analysis fracture multiple crack shear moduli elastic moduli tang geophysics aspect ratio geophysical research Adelinet , M. , C. Dorbath , M. Le Ravalec , J. Fortin , and Y. Guéguen , 2011 , Deriving microstructure and fluid state within...

... of the pore has a strong effect on the elastic properties. This study shows that in case of multiple pore types, the ones with small aspect ratios have a strong impact though of minor volume fraction. The methodology that is developped can be extended to investigate the influence of more parameters in case...

...:20:00 AM Location: Poster Station 19 Presentation Type: Poster nonspherical grain perlin noise amplitude dense pack aspect ratio particle size distribution ellipsoid reservoir characterization packing simulation simulator upstream oil & gas irregularly digital rock annual...

... of grains (layering and fracture induced anisotropy is not considered). The aspect ratio of the inclusions is estimated from the effective porosity of the rock. Shallow soft and stiff rocks have a more disordered microstructure and high effective porosity and therefore have high effective aspect ratios...

... properties in rocks. By using the Mori-Tanaka theory, this work relates rock elastic properties to the pore microstructure. Since the static moduli dependency of elastic properties is more sensitive than that of dynamic moduli, we propose to estimate the distribution of pore aspect ratios by using the static...