Biot coefficient

Author: kssm

August undefined, 2024

WebMay 28, 2024 · For the investigated samples, measured liquid permeabilities were in the range of 7–10 mD and Biot’s coefficients were 0.84–0.91. This is consistent with similar investigations by other researchers in which measured Biot’s coefficients were in … WebFeb 1, 2010 · Biot's coefficient is a measure of sediment stiffness. In the present paper we addressed how this is related to the stress of pore collapse and creep for the calcareous sediments of Kerguelen Plateau. This may point to a route for prediction pore collapse in porous North Sea chalk from data on porosity and seismic velocity.

Biot

WebMar 25, 2024 · Biot coefficient (Fig.1). The amplitude difference between the absolute value of the H and the initial stress increases in the horizontal direction of model with the … WebMay 17, 2024 · The Biot coefficient is a parameter that is encountered in the theory of classical poroelasticity, dealing with the mechanics of a fluid-saturated porous medium … florist in elma wa

Biot

WebJul 11, 2024 · Cement is a poroelastic material rather than elastic material. Early researchers have measured the strengths and elastic properties of oil well cement, but Biot’s effective stress coefficient α remains an important unknown despite its significance to well integrity. Here, we present measurements of α for different types of oil well … WebPoroelasticity is a field in materials science and mechanics that studies the interaction between fluid flow and solids deformation within a linear porous medium and it is an … WebApr 10, 2024 · The Biot coefficient is an important aspect of the theory of classical poroelasticity since it accounts for the rational estimation of effective stresses in a fluid-saturated porous media. The effective stresses ultimately control the deformations and failure of the skeletal fabric. In principle, the Biot coefficient can be estimated if the ... florist in elliot lake ontario

Determining Dynamic Biot’s Coefficient For Unconventionals

WebIn 2008 he was awarded the M. A. Biot medal of Poromechanics from the American Society of Civil Engineers (ASCE) for his outstanding research contributions in extending Biot theory to the acoustics of air filled sound absorbing porous materials by providing models and measuring techniques for the industry. ... 3.5 Reflection coefficient and ... WebAug 1, 2024 · The knowledge of Biot’s effective stress coefficient is of particular importance to simulate the effects of pore pressure variations during reservoir depletion and injection operations. Direct ... great work 2021 themeWebSignificance of biot number in heat transfer: 1) The biot number shows the relation between the internal conductive resistance and convective resistance at the surface of the object. 2) It is used as a criterion for lumped system analysis. 3) The higher value of the biot number indicates that the internal resistance in the object is higher than ... florist in erin ontario

"WebMay 1, 2024 · @article{osti_1375031, title = {Evolution of permeability and Biot coefficient at high mean stresses in high porosity sandstone}, author = {Ingraham, Mathew D. and Bauer, Stephen J. and Issen, Kathleen A. and Dewers, Thomas A.}, abstractNote = {A series of constant mean stress (CMS) and constant shear stress (CSS) tests were … " - Biot coefficient

Biot coefficient

WebThe obtained results ( Table 3) show that the Biot coefficient is stress dependent. The Biot coeftlcient go from 0.84 for a vertical stress of 8.75 MPa to 0.42 for a vertical stress equal to 35 ... WebMay 28, 2024 · Theoretically, pore pressure changes coupled with stress variations in hydrocarbon reservoirs are a function of the Biot’s coefficient, the elastic properties of the rock and the reservoir shape. Thus, in this study, the Biot’s coefficient was measured as a function of porosity, permeability, and volumetric strain for five Gosford sandstone ...

Did you know?

WebFurthermore, because the Biot coefficient was assumed equal to the porosity, the intact region in the simulation was assigned a Biot coefficient of 0.005, whereas the actual value is 1. This led to an incorrect effective stress. It is worth noting that this example is a special case designed to compare the difference between the proposed ... WebMay 1, 2024 · @article{osti_1375031, title = {Evolution of permeability and Biot coefficient at high mean stresses in high porosity sandstone}, author = {Ingraham, Mathew D. and …

WebMay 14, 2024 · The subsurface rock formations may contain predominantly the intragranular matrix porosity in the sedimentary rocks and predominantly the fracture porosity in the nonporous crystalline rocks (Brace 1980, 1984; Merriam et al. 2007).The Biot or the Biot–Willis effective stress coefficient (Biot 1941; Biot and Willis 1957) is an essential … WebNov 24, 2008 · (2), α is the Biot coefficient and varies from 0 through 1. If α=1, the Eq. (2) will be changed to Terzaghi's equation (Eq. (1)). Biot presented the α coefficient as follow: s K α = 1− K (3) In this equation, K is bulk modulus of porous medium and Ks is bulk modulus of solid parts of porous medium. Since Ks>>K, the K/Ks ratio tends to ...

WebThe time-derivative terms of poroelasticity are (1) where is the Biot modulus: (2) is the fluid porepressure, is the Biot coefficient, is the volumetric strain, is the porosity, is the solid (drained) bulk modulus, and is the fluid bulk modulus. Evidently from Eq. WebMar 1, 2015 · The mathematic expression of Biot’s effective stress is: \sigma_ {\text {eff}} = \sigma_ {\text {total}} - \alpha \cdot p , (1) where σ eff is the effective stress, MPa; σ total …

WebJul 10, 2024 · Biot coefficient and elastic moduli are typically assumed to have a constant value for analyzing poroelastic effects of fluid injection. To investigate the stress–pore pressure dependency of Biot coefficient and elastic moduli, we conducted a series of laboratory experiments on a porous dolomite core sample from a reef in Michigan basin.

WebApr 12, 2024 · The coefficient forms an important component of the Biot poroelastic model that is used to examine coupled hydro-mechanical and thermo-hydro-mechanical … florist in englewood ohio florist in emerald victoriaWebFeb 1, 2010 · Biot's coefficient has negative relationship with compressional modulus, shear modulus, oedometer modulus and yield strength. It has positive relationship with creep strain. Biot's coefficient has the potential to be used as a tool for predicting mechanical strength of reservoir rock due to the changed stress state during … florist in emerald isle ncWebJul 1, 2024 · Blöcher et al. 23 states that, the non-linear section of the Biot coefficient curve falls between about 0 and 20 MPa effective pressure; however, the present study performed no unload–reload loops at these low pressures because this test series was designed to explore the Biot coefficient at high mean effective stress. Therefore, it is ... florist in etown kyWebThe Biot-Willis coefficient is a key component associated with the effective stress field, where it represents the proportion of fluid pressure that counteracts the confining stress. … florist in el paso texas on west sideWebBiot Number. Bi is the Biot number, which is a dimensionless number that represents the ratio of the resistance to heat transfer from the inside of the body to the surface of the body (52). ... where k f is the film mass transfer coefficient, d p is the particle diameter, and D eff is the effective diffusion coefficient. The k f value of bovine ... florist in ely cambridgeshireWeb2 days ago · These findings suggest that the anisotropy of the Biot coefficient has a significant impact on deformation caused by frost action, and therefore numerical simulations should adequately consider this factor. The second paper is from Dolaana Khovalyg, Alexandre Mudry, and Thomas Keller from Ecole Polytechnique Fédérale de … florist in eutawville south carolina