Special Section: Scaling in Soil Diff usivity and Sorp vity ...

but not for Berea sandstone. Only two previous neutron imaging studies involving Berea sandstone were found in the literature, both of which focus on core fl ood experiments. Jasti et al. (1987) fl ooded an initially mineral oil-saturated Berea sandstone core with water to observe the migration of …

Berea Sandstone - an overview | ScienceDirect Topics

The samples are Berea sandstone and Ottawa sand-bentonite packs. They found an increase of dielectric permittivity with: • increasing porosity of the brine-saturated rock, and • increasing cation exchange capacity—CEC, describing the clay effect and ionic double-layer polarization phenomena at the solid–fluid interface.

Seismic attenuation in partially saturated Berea sandstone ...

Seismic attenuation in partially saturated Berea sandstone submitted to a range of confining pressures Chapman1, Nicola Tisato2,3, Beatriz Quintal1, and Klaus Holliger1 1Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland, 2Now at Jackson School of Geosciences, University of Texas, Austin, Texas, USA, 3Department of Earth Sciences, ETH Zurich, Zurich, Switzerland

Rock Physics of Geopressure and Prediction of Abnormal ...

The dotted line corresponds to the range 0 to 2 km, where the rock is normally pressured (see Figure 2.7). The black squares and empty circles are the experimental compressional- and shear-wave velocities obtained by Winkler (1985) for oil-saturated Berea sandstone. P-wave and S-wave velocities are accurate within 1% and 2%, respectively.

Microbial Penetration through Nutrient-Saturated Berea ...

Abstract. Penetration times and penetration rates for a motile Bacillus strain growing in nutrient-saturated Berea sandstone cores were determined. The rate of penetration was essentially independent of permeabilities above 100 mdarcys and rapidly declined for permeabilities below 100 mdarcys.

A Laboratory Study of Attenuation and Dispersion Effects ...

A Laboratory Study of Attenuation and Dispersion Effects in Glycerol-Saturated Berea Sandstone at Seismic Frequencies ... The elastic moduli and extensional attenuation of dry and glycerol-saturated sandstone were measured at a differential pressure of 10 MPa at two temperatures of 23 and 31 0 C. Peaks of attenuation in ...

Dynamic behavior of berea sandstone for dry and water ...

In this study we determined the wave profiles of porous Berea sandstone and different stress-levels under shock-compression for dry and water-saturated conditions. This sandstone is well characterized under static conditions [7, 8, 9], but there is a lack of information regarding …

Experimental and Numerical Studies of One-Dimensional ...

dimensional imbibition of water in an air saturated Berea sandstone core. The experiment was conducted weight gain experiment to obtain the times involved in imbibition of water, specifically to know the time scale for capturing the early dynamics of water imbibition. Results from the plot of

Resistivity of Brine Saturated Rock Samples at Elevated ...

Electrical resistivities of rock samples saturated with NaCl solution have been measured at 1 KHz and under 31 MPa hydrostatic pressures and at temperatures up to 350°C. Berea sandstone, Boise sandstone, cores from the Cerro Prieto geothermal field, Mexico, and …

FORMATION DAMAGE IN SANDSTONES CAUSED BY CLAY …

of Berea sandstone was not only strongly dependent on the ion in solution, but also on the sequence or order of flooding from one liquid to another. For example, a sodium-saturated core was sensitive to fresh water but if sodium chloride brine was first displaced with a calcium chloride brine the core was

Shock-recovery experiments of sandstone under dry and ...

Shock-recovery experiments have been performed on Berea Sandstone under dry and water-saturated conditions using a single-stage light-gas gun. Stress levels in the range between 3.1 and 9.8 GPa were achieved by impacting projectiles in a recovery fixture. The microstructural damage of the shocked ...

Experimental measurements of the streaming potential and ...

Measurements of streaming potential and seismoelectric conversion 691 Figure 3 Typical measurement results of the streaming potential and coupling coefficient when the sample (Berea sandstone 500) is saturated with distilled water as a function of pressure. vertical water pressure.

Berea Sandstone - Wikipedia

Berea Sandstone, also known as Berea Grit, is a sandstone formation in the U.S. states of Michigan, Ohio, Pennsylvania, West ia, and Kentucky.It is named after Berea, Ohio.The sandstone has been used as a building stone and is a source of oil and gas.

In Situ NMR Analysis of Fluids Contained in Sedimentary Rock

In Situ NMR Analysis of Fluids Contained in Sedimentary Rock ... Figure 3 shows NMR spectra of Berea sandstone saturated with a light crude oil, viscosity 12 cp, and with a mixture of the same crude oil and water. The spectrum of oil alone shows a ... In Situ NMR Analysis of Fluids Contained in Sedimentary Rock ...

Dilatant hardening of fluid-saturated sandstone

conventionaltriaxial compressiontestsonsilicone-saturated Berea sandstone.Forspecimenstested at 10MPa effective confinement, the peak stress was 25% larger when the strain rate was increased from 2×10 4 to 2×10 3s 1, but the same increase in the strain rate at …

Dilatant hardening of fluid-saturated sandstone ...

TY - JOUR. T1 - Dilatant hardening of fluid-saturated sandstone. AU - Makhnenko, Roman. AU - Labuz, Joseph F. PY - 2015/1/1. Y1 - 2015/1/1. N2 - The presence of pore fluid in rock affects both the elastic and inelastic deformation processes, yet laboratory testing is typically performed on dry material even though in situ the rock is often saturated.

Porosity and Bulk Density of Sedimentary Rocks - USGS

POROSITY AND BULK DENSITY OF SEDIMENTARY ROCKS By G. EDWARD MANGER ABSTRACT More than 900 items of porosity and bulk density data for sedimentary rocks have been tabulated. Most of the data are from the more accessible American, British, German, and Swiss literature. The number of porosity determinations per item ranges from 1 to 2,109.

Acoustic Velocity and Attenuation in Porous Rocks …

confining pressure for water-saturated Berea sandstone from Wyllie et al. [99]. Solid curve has zero pore pressure, so effective pressure (Pe) equals confining pressure. On dashed curves, pore pressure increases with confining pressure to maintain a constant value of effective pressure.

1.4 Geophysics Laboratory- Berea rock physics tests ...

Figure 20: P and S-wave velocities as a function of effective pressure for dry Berea sandstone at 46°C. Figure 21: P and S-wave velocities as a function of effective pressure for CO 2 saturated B2 at 46°C- PP 9 MPa. Figure 22: P and S-wave velocities as a function of effective pressure for brine saturated B2 sandstone at 46°C. Pore pressure ...

Seismic attenuation in partially saturated Berea sandstone ...

We experimentally investigate the frequency scaling of seismic attenuation in Berea sandstone saturated with two fluid phases: a liquid phase, water, and a gas phase, air, carbon dioxide or nitrogen.

Microbial Penetration through Nutrient-Saturated Berea ...

Penetration times and penetration rates for a motile Bacillus strain growing in nutrient-saturated Berea sandstone cores were determined. The rate of penetration was essentially independent of permeabilities above 100 mdarcys and rapidly declined for

Pore compressibility in rocks - Digital Library

Results for Berea sandstone and for models of sand-clay mixtures show that the estimate of the change in the saturated bulk modulus due to substitution of different fluids in the rock may differ in size by a factor of two or more if the pore compressibility is approximately equal to the fluid compressibility instead of the grain compressibility ...

Influence of grain contact stresses on P‐ and S‐wave ...

Aug 14, 2005· It was observed that attenuation for both P and S waves is controlled by grain contact stress and the presence of fluids at the contacts. Attenuation is least for dry specimens loaded hydrostatically and greatest for water‐saturated specimens loaded uniaxially. For hydrostatic loading, the difference between attenuation in dry and saturated rock is nearly constant and varies with stress only ...

Saturation of porous rock and measurement of the B ...

T1 - Saturation of porous rock and measurement of the B coefficient. AU - Makhnenko, R. Y. AU - Labuz, Joseph F. PY - 2013/12/1. Y1 - 2013/12/1. N2 - Laboratory testing of fluid-saturated rock is often needed to properly duplicate field conditions, where pores in rock are filled with a liquid.

Laboratory measurements of seismic attenuation in ...

Laboratory measurements of seismic attenuation in sandstone: Strain versus fluid saturation effects Nicola Tisato1 and Beatriz Quintal2 ABSTRACT In the past few decades, great attention has been focused on uncovering the physics of seismic wave attenuation in fluid-saturated rocks. However, the relationship among

1.2 Berea Sandstone | Global CCS Institute

1.2.1 Berea plugs B1 (dry) and B2 (CO 2 saturated) Berea sandstone plugs were chosen for the commencing core test, because Berea sandstone is well known as a reference rock. Views of core plugs B1 and B2 are shown in Figure 3 and Figure 4, respectively. The plugs had a diameter of 38.1 mm. Strain gauges as shown in these figures were used to ...

A magnetic resonance study of pore filling processes during ...

spectra for a fully water saturated Berea sandstone, with the partially saturated sample by centrifugation in air, indicated that DDIF can be used for the measurement of water filled pore size distribution in partially saturated porous media. Dynamic water imbibition into air-filled Berea sandstone was studied using the DDIF technique.

Low-frequency Dispersion and Attenuation in Partially ...

gation in fluid-saturated rock, ranging from the total dis- tanee of propagation which may be on the order of a kilo- meter, to the shortest characteristic length scales of the TABLE I. Data for Berea sandstone. The shear modulus is p= (1 -- qb ) pf• and the bulk modulus is K= { 1 -- & ) pf-• -- 4It/3. The underlying