Topic
Permeability (earth sciences)
About: Permeability (earth sciences) is a research topic. Over the lifetime, 15424 publications have been published within this topic receiving 288535 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the effect of axial compressive loading on the permeability of three different types of concrete: ordinary concrete (OC), high performance concrete (HPC), and high performance steel fiber-reinforced concrete (HPFC) was examined experimentally.
213 citations
TL;DR: In this article, the authors make a careful study of the breakdown of stability of a layer of fluid subject to a vertical temperature gradient in a porous medium, and give a conclusive cirterion for the onset of convection currents.
212 citations
TL;DR: In this article, the effect of stochastic soil permeability on confined seepage under water retaining structures has been studied, and the results of parametric studies to gauge the impact of the standard deviation and correlation structure of the permeability of soil on the output statistics relating to seepability quantities, exit gradients and uplift pressures are presented.
Abstract: The effect of stochastic soil permeability on confined seepage beneath water retaining structures has been studied. Random field concepts for the generation of soil permeability properties with a fixed mean, standard deviation and spatial correlation structure have been combined with finite element methods to perform Monte Carlo simulations of the seepage problem. Analyses have been performed for a dam with two cut-off walls. The results of parametric studies to gauge the effect of the standard deviation and correlation structure of the permeability on the output statistics relating to seepage quantities, exit gradients and uplift pressures are presented. In all cases, comparison is made with results that would be achieved on a deterministic basis. Flow rates and other quantities are shown to be affected significantly by the standard deviation and the correlation structure of soil permeability. L'article etudie l'influence de la permeabilite d'un sol stochastique sur l'infiltration confinee existant sous ...
212 citations
TL;DR: In this article, the authors investigated the use of non-routine methods to characterize permeability heterogeneity and pore structure of a tight gas reservoir for use in flow-unit identification.
Abstract: Tight gas reservoirs are notoriously difficult to characterize; routine methods developed for conventional reservoirs are not appropriate for tight gas reservoirs. In this article, we investigate the use of nonroutine methods to characterize permeability heterogeneity and pore structure of a tight gas reservoir for use in flow-unit identification. Profile permeability is used to characterize fine-scale (1 in. [2.5 cm]) vertical heterogeneity in a tight gas core; more than 500 measurements were made. Profile permeability, although useful for characterizing heterogeneity, will not provide in-situ estimates of permeability; furthermore, the scale of measurement is much smaller than log scale. Pulse-decay permeability measurements collected on core plugs under confining pressure were used to correct the profile permeability measurements to in-situ stress conditions, and 13-point averages of profile permeability were used to relate to log-derived porosity measurements. Finally, N2 adsorption, a new method for tight gas was used to estimate the pore-size distribution of several tight gas samples. A unimodal or bimodal distribution was observed for the samples, with the larger peak corresponding to the dominant pore-throat size, as confirmed by independent methods. Furthermore, the adsorption-desorption hysteresis loop shape was used to interpret the dominant pore shape as slot-shaped pores, which is typical of many tight gas reservoirs. The N2 adsorption method provides rapid analysis and does not suffer from some of the same limitations of Hg injection. In the future, we hope that the N2 adsorption method may prove useful for flow-unit characterization (based on dominant pore size) of fine-grained (siltstone-shale) tight gas reservoirs.
212 citations
TL;DR: In this paper, the U.S. Geological characterization was conducted which estimated total gas in-place and theoretical maximum CO2 storage capacity within the Marcellus Shale in the Eastern United States.
211 citations