• The purpose of this paper is to present measurements of absolute permeability, total porosity, capillary pressure, and gas relative permeability on several Travis Peak cores. (onepetro.org)
  • A transient test method developed in the early portions of this research has been used to measure absolute permeability and total porosity as a function of net stress. (onepetro.org)
  • In summary the results of these measurements on absolute permeability, total porosity, capillary pressure, and relative permeability present a description of the rock properties for studying fluid flow in a typical tight gas formation. (onepetro.org)
  • Three sets of the experiments were performed during the study using PPAL to FIGURE 1A Study Results Using helium at a constant net stress, the measured permeability values were not FIGURE 1B Absolute Permeability Evaluation By Gas-Slippage Correction Absolute Permeability Evaluation By Double-Slippage Correction 500 500 400 400 Permeability (nD) Permeability (nD) maximum) when the sample is saturated with gas at the pore pressure. (nxtbook.com)
  • At each net stress value, permeability was measured at four gas (pore) pressures ranging from 200 to 500 psig to evaluate absolute permeability. (nxtbook.com)
  • The Xlab extension provides numerical simulation capabilities to compute absolute permeability, thermal conductivity, electrical resistivity, and molecular diffusivity. (thermofisher.com)
  • The database presents the results of numerical estimation of absolute permeability and open porosity for four sandstone samples (sample7, sample25, sample31, sample78) and four carbonates (sampleAH, sample AL, sampleBH, sampleBL). (mendeley.com)
  • However, the first member shale samples exhibited much higher porosity and permeability than the third member shale samples. (hindawi.com)
  • The higher porosity of the clay gouge, 2 to 8 times greater than that in the damage zone rocks, along with surface conduction were the principal factors contributing to the observed low resistivities. (usgs.gov)
  • Triaxial laboratory experiments conducted on two different kinds of sandstones (Flechtinger and Bentheimer) are used to constrain parameters which control porosity changes and thus permeability changes under drained conditions and to calibrate the numerical simulations. (ufz.de)
  • Electrofacies identification is a crucial procedure in reservoir characterization especially in the lack of lithofacies measurements from core analysis. (onepetro.org)
  • The FZI attains reservoir quality evaluation through hydraulic flow unit and kozeny-carman equation, which correlates between permeability, porosity, pore throat, pore geometry and tortuosity factor. (onepetro.org)
  • The geological model included the following reservoir characteristics: porosity, permeability, pressure and lithium concentrations. (advfn.com)
  • The net stress on the cores was increased to simulate the depletion of the reservoir pressure, and the results can be used to observe the effect of formation compressibility on permeability and porosity. (onepetro.org)
  • Formation evaluation refers to the analysis of formation properties such as structure, lithology, porosity, fluid types, saturation and permeability, required to understand a reservoir response. (spegcs.org)
  • Conventionally, these sensor measurements are plugged into elaborate mathematical formulations, or reservoir models, that predict the properties of the subsurface such as the porosity and permeability of rocks. (aquantico.io)
  • The permeability of the inert porous materials considered can be predicted reliably when the pore size distribution is known. (epa.gov)
  • Measurements of the flow-through pore size distribution (PSD) are indicative of significant changes occurring, consistent with the observed increases in permeability. (usc.edu)
  • The reconstructed cuboids are used to determine porosity, pore size distribution, and intrinsic permeability in the membrane's porous structure in all spatial directions. (filtsep.com)
  • Most bituminous paving researchers agree that high air void content (high permeability) should be avoided in the design and construction of bituminous pavements. (astm.org)
  • A core containing a high permeability layer of coarse beads and a low permeability layer of fine beads was inoculated with a microbial culture. (doe.gov)
  • The high permeability layer accepted most of the flow initially. (doe.gov)
  • 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)
  • Here we report electrical resistivity and permeability measurements on core samples from all of these structural units at effective confining pressures up to 120 MPa. (usgs.gov)
  • Electrical resistivity (~10 ohm-m) and permeability (10-21 to 10-22 m2) in the actively deforming zones were one to two orders of magnitude lower than the surrounding damage zone material, consistent with broader-scale observations from the downhole resistivity and seismic velocity logs. (usgs.gov)
  • It was found that gas slippage can be affected by the slot-pore geometry found in highly cemented, low permeability formations. (onepetro.org)
  • The technique measures the ability of gas to flow through pores in cores, and separates the contributions of the type of gas, gas temperature, core geometry, and porosity on core permeability. (foundrymag.com)
  • In this paper, clustering analysis and flow zone indicator were adopted for the electrofacies characterization on a dataset obtained from incorporate of conventional core analysis and CPI logs (Effective Porosity, Water saturation and Shale volume) of three wells in the upper shale member/Zubair formation in Luhais oil field southern Iraq. (onepetro.org)
  • The heterogeneity of porosity distribution is experimentally characterized by scanning electron microscopy scans and reconstructed cuboids of X-ray micro-computed tomography scans. (filtsep.com)
  • A new method recently developed in this research has been used to measure the gas relative permeability and water saturation simultaneously. (onepetro.org)
  • Hydrostatic loading from 1 to 70 MPa in confining stress has been simulated for Flechtinger and Bentheimer sandstones resulting in porosity and permeability decreases. (ufz.de)
  • The pressure decreases with an increase in core print area and sand permeability. (foundrymag.com)
  • To quantify biofilm growth, Berea sandstone core columns are to be inoculated with a single, representative culture and evaluated for biofilm growth and permeability decreases. (doe.gov)
  • The properties of the aquifer depend on the physical characteristics of the materials (porosity, permeability, specific yield, specific storage, and hydraulic conductivities) which are determined by techniques like resistivity surveys and pumping tests followed by remote sensing and geographic information system for better information on the groundwater system. (intechopen.com)
  • Specifically, the present study investigates the change in the flow-through characteristics, porosity, and the mechanical behavior of Mt. Simon Sandstone samples caused by exposure to brine/CO2. (usc.edu)
  • Together, resistivity and permeability data can be used to assess the hydrogeologic characteristics of the fault, key to understanding fault structure and strength. (usgs.gov)
  • The total gas volume produced during loss-on-ignition (LOI) measurements has been used to predict pressures. (foundrymag.com)
  • 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)
  • A relationship is determined between the obtained vibration measurements and the measured formation parameters at the plurality of depths. (justia.com)
  • Molecular dynamics simulations and solid-state nuclear magnetic resonance spectroscopy measurements of C-H bond order parameters and effective correlation times in a POPC-GM3 bilayer. (lu.se)
  • The low resistivities and strength measurements of the SAFOD core are consistent with observations of low resistivity clays that are often found in the principal slip zones of other active faults making resistivity logs a valuable tool for identifying these zones. (usgs.gov)
  • This poroelastic formulation has been implemented in the 3D finite element method-based simulator OpenGeoSys to predict porosity changes. (ufz.de)
  • 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)
  • Our experiments show that the porosity of the Mt. Simon samples slightly increases after exposure to CO2/brine, while the permeability increases more substantially (depending on the confining pressure environment). (usc.edu)
  • We know to be permeable, porosity is an essential factor but these pores only allow flow when they are interconnected with each other. (civil-engg-world.com)
  • However, it is only in the last two decades that rate measurements have taken advection in permeable sediments into account. (nature.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)
  • Topics include flow and pressure measurement for Newtonian and non-Newtonian fluids, dimensional analysis and pressure drop, and flow through porous media and packed beds. (uaeu.ac.ae)
  • The advancement of technology in producing tight gas sands requires rock property measurements involving the flow of fluids in cores. (onepetro.org)
  • Simple laboratory techniques were developed to measure the physical properties needed in these prediction methods and to check these methods through a series of systematic measurements. (epa.gov)
  • 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)
  • For example, to assess the influence of diagenetic processes, such as cementation and compaction, surface properties like roughness, or tuning the segmentation of a sample to match experimental measurements. (springer.com)
  • Nonetheless, Young's modulus measurement on rocks is time consuming, and various studies were conducted to link Young's modulus to other rock properties routinely measured, such as porosity (Alison, 1987), clay content (Tutuncu, 1992), and permeability (Bossennec et al. (trb.org)
  • However, it was difficult to quantify the effect of permeability because of the lack of data on the rate of gas generation and the properties of the gas evolved. (foundrymag.com)
  • The research article 'How does porosity heterogeneity affect the transport properties of multibore filtration membranes? (filtsep.com)
  • This study analyzes pure water forward and reverse permeation and backwashing phenomena for a polymeric multibore membrane with spatially-varying porosity and permeability properties using computational fluid dynamics simulations. (filtsep.com)
  • This work reveals (a) anisotropic permeability values and isoporosity in all directions and (b) differing contributions of each lumen channel to the total membrane performance, depending on the membrane-skin's properties. (filtsep.com)
  • These physical fuel properties also affect permeability. (frontiersin.org)
  • Reduction in porosity of 8.1 % with about 1.15 % error for the Flechtinger sandstone has been simulated and of 1.4 % with about 0.54 % error for the Bentheimer sandstone. (ufz.de)
  • The obtained formulas can be applied to calculating the continuous permeability log in the borehole profile on the basis of the porosity curve. (earthdoc.org)
  • A vibration measurement is obtained at each of a plurality of depths in the borehole. (justia.com)
  • The 3D geological model was then utilized to evaluate scenarios of connected porosity that comprise the resource volume in the model domain. (advfn.com)
  • Results are compared to experimental measurements to evaluate the precision of each poroelastic model. (ufz.de)
  • This is also consistent with mineral/clay dissolution, confirmed by the porosity, transport, and mechanical property measurements as well as electron microscopy analysis of the same samples. (usc.edu)
  • Downhole measurements and analysis of core retrieved from Phase 3 drilling reveal two narrow, actively deforming zones of smectite-clay gouge within a roughly 200 m-wide fault damage zone of sandstones, siltstones and mudstones. (usgs.gov)
  • The high percentage of fine-grained clay in the deforming zones also greatly reduced permeability to values low enough to create a barrier to fluid flow across the fault. (usgs.gov)
  • Since water is pumped into low permeability formations during stimulation treatments, two-phase rock property measurements are important if one wishes to model the effects of the water upon gas recovery. (onepetro.org)
  • Because the determination of porosity in bituminous mixtures is based on a calculated value, which is dependent on the accuracy of the mix composition, it is difficult to use porosity as a crucial parameter for acceptance of constructed bituminous pavements. (astm.org)
  • It is shown by our laboratory measurements that the required frequency band should be up to 50 - 60 kHz to reflect the features of the spectral composition of the acoustic emission in predicting the fluid content. (scirp.org)
  • However, the gas volumes cannot be converted directly into rates of evolution in molds and cores because LOI measurements are made at relatively low heating rates. (foundrymag.com)
  • Measurement of nutrient uptake in homogeneous cores was consistent only with qualitatively different kinetics of nutrient uptake measured in batch experiments. (doe.gov)
  • Economic production of hydrocarbons stored in these marls, which have nanodarcy permeabilities, can only be obtained by inducing and maintaining fractures with hydraulic stimulation. (geoscienceworld.org)
  • Finally, electrofacies identification through the FZI technique has similar ranges of FZI values with specific porosity and permeability values. (onepetro.org)
  • Even though such measurements are difficult to obtain, the resulting values are needed to accurately model gas flow in such reservoirs. (onepetro.org)
  • The plug's porosity and permeability were measured at seven net stress values from 1,300 to 7,000 psig. (nxtbook.com)
  • If these values do not match the actual values obtained from field measurements, also known as historical data, the algorithm is penalized. (aquantico.io)
  • This paper presents an acoustic assessment of pneumatic and electric jackleg drills involving Noise Source Identification (NSID), penetration rate measurements, operator's cumulative noise dose measurements, and determination of sound power levels. (cdc.gov)
  • The system of measurements can be performed on any low permeability core on a routine bases. (onepetro.org)
  • In fact, the uniaxial/triaxial measurement of Young's modulus on core samples has been standardized over decades and now is very straightforward (ASTM, 2017). (trb.org)
  • The effects of metal temperature, core permeability, and core age on gas-evolution rate and volume were studied, too. (foundrymag.com)
  • First, the core plug's porosity and permeability were measured using helium. (nxtbook.com)
  • Project researchers quantified the relationship between nutrient consumption and permeability reduction in laboratory systems. (doe.gov)
  • The injection of nutrients caused microbial growth and consequent reduction in permeability. (doe.gov)
  • A methodology was established for injecting nutrient into porous media inoculated with microbes while measuring nutrient consumption and permeability reduction continuously. (doe.gov)
  • Various cases mimicking the pure water permeation, fouling, and backwashing behavior of the membrane are simulated and compared to previously obtained MRI measurements. (filtsep.com)
  • 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)
  • 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)
  • A vibration measurement at a new drill bit location is obtained and the formation parameter at the new drill bit location is predicted from the vibration measurement and the determined relation. (justia.com)
  • Formation type can be determined at the new drill bit location from the new vibration measurement and the determined relationship. (justia.com)
  • Various drilling systems, including measurement-while-drilling (MWD) and logging-while-drilling (LWD) include formation evaluation sensors which can be used to determine formation type. (justia.com)
  • Unfortunately, these formation evaluation sensors are typically at a location on the drill string uphole of the drill bit, often at a distance greater than 100 ft., and subsequently obtain relevant formation measurements only after the formation has been drilled. (justia.com)
  • Therefore, such formation measurements are generally not usable in determining the formation at the drill bit. (justia.com)
  • The present disclosure provides methods and apparatus for determining formation type at the drill bit and/or a formation parameter at the drill bit using formation measurements obtained at the formation sensors. (justia.com)
  • and predicting the formation parameter at the new drill bit location from the vibration measurement and the determined relationship. (justia.com)
  • and predicting the formation parameter at the drill bit location using the vibration measurement and the determined relation. (justia.com)
  • A total of 63 samples was tested with permeabilities ranging from 1.5-39.1 square microns. (epa.gov)
  • Porosity is used to define proportion of total volume of the concrete that is occupied with pores and generally expressed as percentage. (civil-engg-world.com)
  • FITC-dextran is used in cardiovascular, microcirculation, perfusion, cell monolayer and cell membrane permeability research as fluorescent flux tracer compound that supports the measurement of processes such as blood flow, membrane damage, vascular drainage and renal elimination. (sigmaaldrich.com)
  • Physical reasons for the difference in acoustical emission spectra of samples of different porosity and in the relaxation times of the acoustic emission level caused by different porosity and fluid saturation are discussed. (scirp.org)
  • The relations permeability vs. porosity were determined for them and the results were better than those obtained for the whole data set, but still they were not satisfied. (earthdoc.org)
  • This paper introduces a new porosity measuring procedure based on the Leeds vacuum porosity meter and presents the results obtained from this apparatus for asphalt concrete made with shredded-rubber modified binder. (astm.org)
  • 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)
  • Based on the particle characterization, the air permeability of the fuel beds was also calculated using the Kozeny-Carman equation. (frontiersin.org)
  • To model the effect of biofilm growth on permeability mechanistically, researchers use physically representative models of porous media to simulate the consequences of several modes of biomass growth at the grain scale. (doe.gov)
  • The Laguerre space partition is the basis underlying all the implemented topological analysis methods: inter-atomic, inter-residue or inter-molecular contacts, connected components of the bulk or of the surface, optimal paths, porosity, genus of the surface, stratification. (nature.com)
  • This task remains challenging, especially when considering local porosity variations caused by lumen- and shell-side membrane skins and macro- and micro-void structures, all of them present in multibore membranes. (filtsep.com)
  • The work has also obtained qualitative changes in permeability with the introduction of a Microporous Layer and impregnation of PTFE onto the Gas Diffusion Layer. (rit.edu)
  • If the pore system is discontinuous or however pores are ineffective in respect of transportation of fluid, the permeability of concrete will be low, even the concrete mass have high porosity. (civil-engg-world.com)
  • Bulk densities and porosities were obtained with gamma ray attenuation equipment. (epa.gov)
  • Electrofacies classification is essential to improve permeability-porosity relationships in non-cored intervals. (onepetro.org)