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HydraulicDetermine permeabilityAffect permeabilityPorous MediaReservoir permeabilityCompactionEquationsFracturesIntrinsicFormationReservoirsSoilsSaturationPoresSignificantFluidsRefersPore spaceInvestigateCurvesEquationDensityExperimentsShallowCoresBehaviorGrainUniformWaterInvestigationEvolutionEffectiveDependentPropertiesFabricIncreasesParticlesRockLaboratorySuggestsEffectsFeaturesExperimentalIncreaseCoarseResultsSamplesMediumAimsApproachRangeAveragePressureVolume
Hydraulic4
  • The Flow Zone Indexes were calculated for the units of the same hydraulic parameters and relations permeability vs. porosity were separately calculated for each such unit. (earthdoc.org)
  • Fill in the table below, indicating in what manner ( increase, decrease, no change ) you expect the quantities listed (porosity, hydraulic conductivity, and permeability) to change in response to the rock characteristic given. (carleton.edu)
  • Permeability and the corresponding hydraulic diffusivity decrease from 10 −17 to less than 10 −18 m 2 and from 10 −7 to 10 −8 m 2 /s at 0.5 and 5 MPa, respectively. (elsevierpure.com)
  • However, previous research has suggested that the notional permeability is not only dependent on structural parameters, but also on hydraulic parameters. (tudelft.nl)
Determine permeability1
Affect permeability2
Porous Media1
Reservoir permeability3
  • The fracturing water injected into the underground gas reservoirs for development purposes has polluted the reservoirs, triggering a decrease in reservoir permeability and gas production. (mdpi.com)
  • We study the effects of fracturing water pollution on reservoir permeability with core experiments. (mdpi.com)
  • The geomechanical approach has proven most effective in areas of subtle structure where the reservoir behaves elastically and has proven to be less effective in areas where deformation has been more extreme and reservoir permeability is dominated by stress-insensitive shear fractures. (doe.gov)
Compaction2
  • You can see how this process, known as compaction, makes the rock's porosity decrease with time . (moviecultists.com)
  • In contrast, a comparison of ship-board measurements and standard compaction curves suggested that measured porosity was higher than the predicted porosity at greater depths. (elsevierpure.com)
Equations4
  • By solving the Navier-Stokes equations (or its linear approximation for small Reynolds numbers, called Stokes flow or creeping flow) on the microscale geometry, the porosity and permeability of the porous medium can be extracted. (comsol.com)
  • The correlation coefficients were good and the prediction equations for permeability were constructed. (earthdoc.org)
  • Porosity values were deduced from well log whereas permeability and pressure values were computed using empirical equations. (geologicalbehavior.com)
  • This Volume Averaging introduces a porosity into the equations. (tudelft.nl)
Fractures3
  • Secondary porosity features, like fractures, frequently have significant impact on the permeability of the material. (moviecultists.com)
  • The goal is to develop better ways to explore for natural gas in tight sand reservoirs by demonstrating the applicability of a new exploration technology that identifies areas of high density natural fractures (and, thus, high gas well productivity) in otherwise low-permeability (low productivity) geologic settings. (doe.gov)
  • Both of these aquifers possess highly-variable secondary porosity and permeability related to fractures that have been enlarged, sometimes to cavernous proportions, due to solution processes. (usgs.gov)
Intrinsic1
Formation3
  • In the group of lab data from the Rotliegendes formation from the Polish Lowland, correlations between permeablity and porosity showed not very good R coefficients and a great dispersion. (earthdoc.org)
  • In addition, precipitation and dissolution of minerals may lead to an alteration in porosity and permeability of the host formation. (nature.com)
  • This thesis aims to characterise the spatial petrophysical distribution of porosity and permeability properties in the Tarbert and Ness Formation at the Gullfaks Field. (ntnu.no)
Reservoirs4
  • Timur, A., "An Investigation of Permeability, Porosity and Residual Water Saturation Relationships for Sandstone Reservoirs. (aptiantechnical.com)
  • The analysis of the wells show that wells OTIG9 and OTIG11 have better reservoirs indicating high potentiality and productivity due to their more porous and permeable nature, reflecting well sorted coarse grained sandstone and linearity in the relationship between porosity, permeability and pressure. (geologicalbehavior.com)
  • Expanded of the technology scope to include aspects of viscoelastic and discrete fracture network modeling to more closely approximate the complex permeability fabric of naturally fractured reservoirs, and established techniques for determining the appropriate technology to apply to particular fracture faces. (doe.gov)
  • The potential for using such stress modeling to estimate in-situ bulk permeability within naturally fractured reservoirs was first observed in the Rulison area of the Southern Piceance Basin. (doe.gov)
Soils1
Saturation3
  • The permeability equation can be rearranged to solve for water saturation, when porosity and permeablility are known. (aptiantechnical.com)
  • Start by inputting saturation-porosity data series, (green, blue and orange cells). (aptiantechnical.com)
  • The model has been developed to study local and global responses on wetting at constant volume, such as water mass transfer between powder and pellets, evolution of local degrees of saturation and porosities -inside pellets and powder-, and mean stress evolution in pellet and powder domains. (easychair.org)
Pores3
  • Permeability characterizes the resistance to flow through the pores. (comsol.com)
  • A rock may be extremely porous, but if the pores are not connected, it will have no permeability. (moviecultists.com)
  • Effective permeability is the ability of fluids to pass through pores of rocks or membranes in the presence of other fluids in the medium. (moviecultists.com)
Significant2
  • Our results suggest that the density increase of resident species causes significant enhancement in CO 2 dissolution, although no significant porosity and permeability alterations are observed. (nature.com)
  • The modeling results suggest that near-hydrostatic pressure at shallow depths and significant overpressure at greater depths proposed by the porosity gap method is explained by the non-linearity of transport properties. (elsevierpure.com)
Fluids2
  • Highly porous rocks, such as sandstones, typically have porosities of 5 percent to 25 percent, giving them large amounts of space to store fluids such as oil, water, and gas. (ucsusa.org)
  • A highly permeable rock will permit gas and liquids to flow easily through the rock, while a low-permeability rock will not allow fluids to pass through. (ucsusa.org)
Refers2
  • Permeability refers to how connected pore spaces are to one another. (moviecultists.com)
  • Porosity refers to the amount of empty space contained within the grains of a rock. (ucsusa.org)
Pore space2
  • Porosity, which is defined as the volume fraction of the pore space, determines the superficial average velocity. (comsol.com)
  • Porosity is the amount of pore space that is between particles in soil or rocks. (moviecultists.com)
Investigate2
  • Before we investigate the porosity and permeability of a porous medium, we must discuss the generation of the microscale geometry. (comsol.com)
  • Such indeterminacies have prompted Professor Kathleen Riach [pictured left] (Monash University, Australia) and Professor Samantha Warren [pictured right] (University of Essex, UK) to investigate what impact such 'corporeal porosity' might have in a white-collar office environment. (improbable.com)
Curves1
  • The effects of modifying agents on the composite: density, total porosity, thermal conductivity, vapor permeability, sorption/desorption curves, and capillary uptake were studied. (researchgate.net)
Equation3
  • Permeability can be modeled with the Kozeny-Carman equation using a recursive approach for computing the representative grain size from those of the components in the mixture. (wright.edu)
  • The air permeability was then calculated using Darcy's Law or the Forchheimer equation from the pressure drop measurements, depending on the Reynolds number. (frontiersin.org)
  • Based on the particle characterization, the air permeability of the fuel beds was also calculated using the Kozeny-Carman equation. (frontiersin.org)
Density2
  • Raymer, L.L., "Elevation and Hydrocarbon Density Correction for Log-Derived Permeability Relationships. (aptiantechnical.com)
  • Well logs data comprising of comprising of gamma ray, spontaneous potential, density and neutron logs from four oil wells were analysed for determining the influence of pressure on porosity-permeability relationship in the study area. (geologicalbehavior.com)
Experiments2
  • In this webinar we will review some results from the state-of-the-art integrated flow system for ZEISS Xradia Versa XRM, allowing for full steady state relative permeability experiments to be conducted at reservoir conditions. (zeiss.com)
  • Porosity, permeability, and grain size measurements in laboratory experiments were conducted on core samples from gas-hydrate-bearing regions offshore from the Krishna-Godavari Basin, eastern India. (elsevierpure.com)
Shallow2
  • NGHP Expedition 02 JAMSTEC Science Team 2019, ' Porosity, permeability, and grain size of sediment cores from gas-hydrate-bearing sites and their implication for overpressure in shallow argillaceous formations: Results from the national gas hydrate program expedition 02, Krishna-Godavari Basin, India ', Marine and Petroleum Geology , vol. 108, pp. 332-347. (elsevierpure.com)
  • Scotchbond etchant produced deep interprismatic and intercrystal porosity in control enamel and shallow etch patterns with minimal intercrystal porosity in hypomineralized enamel. (who.int)
Cores1
Behavior2
  • The air permeability of a fuel bed is a critical factor that influences fire behavior because it controls the amount of air or oxygen available for combustion within the fuel bed. (frontiersin.org)
  • As permeability affects combustion, fire behavior in fuel beds can be better modeled by improving the physical understanding of permeability in fuel beds. (frontiersin.org)
Grain1
  • The relatively small overpressure generation in channel-filled sites compared with slope sites can be explained by the higher permeability due to coarser grain size and larger sand fraction and by the smaller basal influx. (elsevierpure.com)
Uniform2
  • The simulation allows observing that the mixture tends towards a uniform structure of porosity as the pellets expand and the clay powder is compressed by pellets. (easychair.org)
  • The Tuscaloosa aquifer consists of the Tuscaloosa Group, an unconsolidated clastic deposit that has relatively uniform primary porosity and permeability. (usgs.gov)
Water4
Investigation1
  • Khalil, R , Emadibaladehi, S & Heinze, L 2020, ' An Experimental Investigation of Cryogenic Treatments Effects on Porosity, Permeability, and Mechanical Properties of Marcellus Downhole Core Samples ', Journal of Natural Gas Science & Engineering . (ttu.edu)
Evolution1
Effective2
  • A well-defined relation between permeabilty and effective porosity is a way for calculating permeability in all cases where direct lab measurements are impossible. (earthdoc.org)
  • The effect of Reynolds number on effective permeability was aslo investigated, and it was found that the transition from Darcian to non-Darcian flow occur at different Reynolds numbers for different fuel particles. (frontiersin.org)
Dependent1
  • Based on a literature study a hypothesis is made about the variables on which the notional permeability is dependent. (tudelft.nl)
Properties5
  • Here, we look at how to extract the macroscopic flow properties of porosity and permeability from a fully resolved microscale submodel. (comsol.com)
  • If the porosity and permeability are not known, experimental results are necessary to quantify these material properties. (comsol.com)
  • Semi-analytical models that rely on averaged structural properties (i.e., porosity and tortuosity) have been proposed, but these features only partly summarize the domain, resulting in limited applicability. (springer.com)
  • It involves properties from the ground such as porosity or permeability. (unine.ch)
  • The work has already been done for additive properties such as porosity. (unine.ch)
Fabric1
  • Differences between the active and passive approaches were as high as 5.5-fold for the fabric with the lowest air permeability (0.00067 m/sec-Pa), suggesting the active method overestimated penetration in dense fabrics because the active method draws air at a constant flow rate regardless of the resistance of the test fabric. (cdc.gov)
Increases1
  • The significance of this study is that it increases the ability to predict the air permeability of fuel beds in forests, which is essential for modeling wildland fire behaviors involving in porous fuel beds. (frontiersin.org)
Particles1
  • The results show that the experimental method is preferred when determining the air permeability for natural forest fuel beds due to the variability in the size and shape of the particles. (frontiersin.org)
Rock5
Laboratory1
  • A one-dimensional sedimentation model recreated overpressure profiles similar to those predicted by porosity gaps, under the assumption of large basial fluid influx or lower permeability than that derived from laboratory data. (elsevierpure.com)
Suggests1
  • The definition of the notional permeability suggests that a single P-value can be attributed to a structure. (tudelft.nl)
Effects2
  • Ennis-King and Paterson 20 investigated analytical and numerical methods and observed that the overall dissolution rate depends on the balance between the effects of permeability alterations and the consumption of dissolved CO 2 . (nature.com)
  • This paper aims to examine the effects of porosity and permeability changes of the coal seam on methane emissions in an underground continuous miner section. (cdc.gov)
Features1
  • The mixture presents multi-modal porosity features that significantly evolve during the hydro-mechanical paths. (easychair.org)
Experimental1
Increase3
Coarse1
  • Porosity and permeability were measured in mixtures of fine, medium, and coarse sand, where the volume fraction of each of the three components was systematically varied. (wright.edu)
Results2
Samples2
Medium2
  • The air permeability of a fuel bed, which can be considered a porous medium, characterizes the ease with which air can pass through it. (frontiersin.org)
  • This work presents a fractal porous medium model to predict gob porosity and permeability for controlling methane flow and to predict air leakage into the gob. (cdc.gov)
Aims1
Approach1
  • The porosity varies non-linearly with the volume fractions, and can be modeled with a piecewise-linear approach. (wright.edu)
Range3
  • Once data have been loaded, record the predicted permeability range for each series. (aptiantechnical.com)
  • The average porosity, permeability and pressure values for the four wells range from 0.1% to 30.9%, 34.9mD to 306.4mD, 61926.9psi to 109928.1psi respectively. (geologicalbehavior.com)
  • Four nonwoven fabrics with a range of thicknesses, porosities, and air permeabilities were evaluated. (cdc.gov)
Average1
Pressure1
  • Figure 5(a) also shows that the effect of on the apparent permeability is much larger at low pore pressure than at high pore pressure. (moviecultists.com)
Volume2