Bulk modulus of sandstone

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August undefined, 2024

WebKs, _d are known. Values of 40.0 x 10l° dynes/cm 2 and 0.12 are suggested for sandstone Ks and ad, respectively (Hilterman; Hampson and Russell, 1990). From equation (5) and (6), it is clear that space modulus M is a function of porosity _, water saturation Sw and bulk modulus of dry rock Kd. However, Kd can be obtained by knowing Kd0. WebTo study the mechanical properties of sandstone during cyclic loading and unloading, Richards et al. developed an elastic constitutive model that combined experimentally …

Effect of Thermal Treatment on the Physical and Mechanical

WebApr 6, 2024 · An underground coal gasification (UCG) process is strongly exothermic, which will cause thermal damage on rock cap. We proposed a new thermal damage numerical model based on a two dimension particle flow code (PFC2D) to analyze the inception and extension of cracks on pre-cracked red sandstone, which were thermally treated at a … Websandstone samples are first assumed to be proportional to that of the standard sample, and are then adjusted to fit velocity measurements. Dry bulk and shear moduli at different … taylor rabe baseball

Grain bulk modulus of sand. - Scitation: Acoustical Society of …

WebJun 25, 2015 · Poorly cemented sands (Class III) approach the lower Reuss bound for velocity. Pure suspensions are dominated by the modulus of water (Class IV) and are almost independent of the porosity. However, such suspensions are rare. Another important class is dominated by fractures (Class V). http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20242024000300006 WebSep 2, 2024 · The grain bulk modulus is a crucial property of a rock frame, determining poroelastic responses such as seismic velocity. Conventionally, the grain bulk modulus … taylor rahmani

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Measurement of Grain Bulk Modulus on Sandstone Samples …

WebMar 14, 2024 · For example, sandstone (characteristically quartzose) has a typical dry bulk density of 2.0–2.6 g/cm 3, with a porosity that can vary from low to more than 30 percent. … Webshear modulus (G ref) is unchanged by the pore fluids, which in our case are represented by air and water. The bulk modulus of the pore space is a weighted harmonic mean of the bulk moduli of the pore constituents (Gassmann, 1951). When the two pore constituents are water and air, the bulk modulus of the pore space fluids (K fl) can be ... taylor ranch arabians utahWebFeb 2, 2015 · We report experimental data on the frequency dependence of bulk elastic modulus in porous sandstones. A new methodology was developed to investigate the dispersion/attenuation phenomena on a rock’s bulk modulus K for varying confining pressures in the range of 1–50 MPa and fluids of varying viscosities (i.e., air, glycerin, … taylor rd meats karaka

"WebAug 26, 1998 · The objective of this project is to determine the grain bulk modulus of sand, as it has not been found directly before. The compressibility of sand has been assumed … " - Bulk modulus of sandstone

Bulk modulus of sandstone

Bulk moduli of sandstones subjected to isotropic stress: …

WebApr 1, 2024 · In a complex stress field of underground mining or geotechnical practice, tension damage/failure in rock masses is easily triggered and dominant. Unlike metals, rocks are generally bi-modularity materials with different mechanical properties (Young’s modulus, etc.) in compression and tension. It is well established that the Young’s … Web6 rows · Aug 1, 2024 · The experimental result of this study demonstrates that the dynamic bulk modulus is a reasonable ...

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WebJan 27, 2024 · The bulk modulus is considered a descriptor of elastic properties because a compressed material returns to its original volume once the pressure is released. The … WebFeb 2, 2015 · We report experimental data on the frequency dependence of bulk elastic modulus in porous sandstones. A new methodology was developed to investigate the …

WebJun 5, 2013 · (a) First we use the Xu–White model to derive the bulk and shear modulus of dry rock in a sand–clay mixture in section 2.2. (b) Secondly, we use Gassmann's equations to calculate the fluid-saturated elastic properties, including compressional and shear-wave velocities, in section 2.1. WebAug 26, 1998 · The grain bulk moduli of several different types of sand from various locations were measured. The method involves compressing a known volume of sand, …

WebAug 26, 2024 · The grain bulk modulus is a crucial property of a rock frame, determining poroelastic responses such as seismic velocity. Conventionally, the grain bulk … Web1 day ago · 1.Introduction. Porosity and permeability are the crucial parameters for understanding the slope behavior under static and dynamic loadings (Zhang et al., 2014; Choo et al., 2024; Gao et al., 2024).Especially for embankments along water bodies, pore pressure built-up and dissipation cause volumetric deformation of the soil matrix, thus …

WebOct 17, 2024 · Cross-plotting bulk modulus vs. moduli ratio can qualitatively group measured cores and Monte-Carlo simulated realizations into different mineral-rich and saturation states properly. ... J.G. Experimental and theoretical verification of the effect of fluid viscosity on the dispersion and decay of sandstone elastic modulus. Chin. J. …

Websat = saturated bulk modulus, K 0= bulk modulus of the minerals, K fl= bulk modulus of pore fluid, K*= bulk modulus of porous rock frame, and φ= porosity. P wave velocity (Vp) can be calculated once ‘K sat’ is calculated for desired fluid saturation using Gassmann’s equation. B sat p K G V ρ 3 4 + = (2) Where G = shear modulus; ρB ... taylor rapp daniWeb• Grain bulk modulus of sandstone ranges broadly due to deposition, composition, and microstructure differences. • Cementation is a … taylor rental bangor meWebAug 26, 2024 · Conventionally, the grain bulk modulus is estimated with bulk moduli of compositional minerals. A systematic measurement is still scarce in answering what factors control the grain bulk modulus. We test 38 sandstone samples with porosity ranging from 4 to 35% from three fields on the Norwegian continental shelf through unjacketed tests. taylor sarazen wausau obitWebSep 14, 2016 · We conducted an extensive suite of true triaxial experiments in two porous sandstones, Bentheim (porosity ≈ 24%) and Coconino (17.5%). Our experiments demonstrate that failure of both sandstones is not only a function of σ 3 but also of σ 2.For a given σ 3, σ 1 at failure (σ 1,peak) increases as σ 2 is raised above σ 3 between tests. … taylor runyanWebThe unjacketed bulk modulus of sandstone, Ks', is often considered to be equal to the bulk modulus of quartz, the main mineral which forms it. However, preliminary tests and some other works show that for Berea sandstone this assumption might be violated. Three different types of laboratory experiments were performed on the rock to measure Ks ... taylor rental meridian msWebApr 10, 2013 · The drained Young’s modulus and Poisson’s ratio of Flechtinger sandstone were measured to be 18.1 GPa and 0.31, respectively. The saturated bulk modulus was calculated to be 15.9 GPa. Its unconfined compressive strength (UCS) was experimentally determined by Hassanzadegan et al. ( 2012) to be 56.7 MPa. taylor rental dunk tankWebThe Gassmann (1951) theory predicts the bulk modulus of the fluid-saturated porous medium from the known bulk moduli of the solid matrix, the frame, and the pore fluid and assumes that the shear modulus of sedimentary rocks is not affected by fluid saturation. taylor rental pembroke ma