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Journal ArticleDOI

Permeability in Rotliegend gas sandstones to gas and brine as predicted from NMR, mercury injection and image analysis

TL;DR: In this paper, a pore size distribution for 63 samples of Rotliegend sandstone is estimated by using the physically based Kozeny equation linking permeability with porosity and pore sizes, and the measured brine permeabilities are lower than predicted based on bound water alone for these illite rich samples.
About: This article is published in Marine and Petroleum Geology.The article was published on 2015-06-01 and is currently open access. It has received 73 citations till now. The article focuses on the topics: Nuclear magnetic resonance in porous media & Permeability (earth sciences).

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  • Accepted Manuscript Permeability in Rotliegend Gas Sandstones to gas and brine as predicted from NMR, mercury injection and image analysis Esther Rosenbrand, Ida Lykke Fabricius, Quentin Fisher, Carlos Grattoni PII: S0264-8172(15)00034-3 DOI: 10.1016/j.marpetgeo.2015.02.009.
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Journal ArticleDOI
TL;DR: In this paper, a review of low-permeability gas reservoir rocks can be found, which can be divided into two categories: steady state and unsteady state experiments.

210 citations

Journal ArticleDOI
TL;DR: The relationship between microscopic pore structure parameters, such as pore geometry, pore size distribution and pore network, and macroscopic consequences such as permeability, reservoir quality index, Swanson parameter, fractal dimension as well as NMR parameters, have been investigated in this article.
Abstract: Laboratory measurements including porosity, permeability, high-pressure mercury intrusion (HPMI), nuclear magnetic resonance (NMR) measurements, and microscopic analysis of thin sections and scanning electron microscopy (SEM) were performed to provide insights into the microscopic pore structure of the Xujiahe Formation tight sandstones in Sichuan Basin. The relationships between microscopic pore structure parameters, such as pore geometry, pore size distribution, pore network, and macroscopic consequences, such as permeability, reservoir quality index, Swanson parameter, fractal dimension as well as NMR parameters, have been investigated. The results show that the pore systems are dominated by secondary dissolution porosity with minor amounts of primary porosity and microfracture. NMR T2 pore size distributions are either uni- or multimodal. Long T2 components are not frequently present due to the lack of the macropores, whereas as shorter T2 components dominate the T2 spectrum. T2gm (the geometric mean ...

165 citations

Journal ArticleDOI
01 Jun 2017-Fuel
TL;DR: In this paper, small-angle neutron scattering (SANS) technique was applied on four Longmaxi shale samples (JY-01 to -04) with a range of different lithology.

103 citations

Journal ArticleDOI
01 Jan 2018-Fuel
TL;DR: Authigenic clay (Aclay) is common in grain-supported tight reservoirs and exerts a primary control on reservoir's percolation properties as mentioned in this paper, where the authors investigated the impacts of Aclay on pore connectivity, pore size distribution, and rock compressibility.

91 citations

Journal ArticleDOI
TL;DR: In this article, a case study of the Low Cretaceous tight gas sandstone of the Songliao Basin in China is presented, which compares and integrates various experimental data to uncover the full-range PSD of tight sandstone with different pore ranges.

87 citations

References
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Book
01 Jan 1972
TL;DR: In this paper, the Milieux poreux Reference Record was created on 2004-09-07, modified on 2016-08-08 and the reference record was updated in 2016.
Abstract: Keywords: Ecoulement souterrain ; Milieux poreux Reference Record created on 2004-09-07, modified on 2016-08-08

12,446 citations


"Permeability in Rotliegend gas sand..." refers background or methods in this paper

  • ...Forms of the Kozeny equation in which the parameter reflects tortuosity are often referred to as Kozeny-Carman equations (e.g., Bear, 1972; Berryman and Blair, 1987; Mavko and Nur, 1997)....

    [...]

  • ...However, tortuosity for hydraulic flow would not necessarily be the same as tortuosity for diffusion and electrical conduction (Bear, 1972; Carman, 1937; Pape et al., 2006)....

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Journal ArticleDOI
TL;DR: In this article, the rate of penetration into a small cylindrical capillary of radius $r$ was shown to be: ρ(r}^{2}+4\ensuremath{\epsilon}r)
Abstract: Penetration of Liquids into Cylindrical Capillaries.---The rate of penetration into a small capillary of radius $r$ is shown to be: $\frac{\mathrm{dl}}{\mathrm{dt}}=\frac{P({r}^{2}+4\ensuremath{\epsilon}r)}{8\ensuremath{\eta}l}$, where $P$ is the driving pressure, $\ensuremath{\epsilon}$ the coefficient of slip and $\ensuremath{\eta}$ the viscosity. By integrating this expression, the distance penetrated by a liquid flowing under capillary pressure alone into a horizontal capillary or one with small internal surface is found to be the square root of ($\frac{\ensuremath{\gamma}\mathrm{rt}\ifmmode\cdot\else\textperiodcentered\fi{}cos\ensuremath{\theta}}{2\ensuremath{\eta}}$), where $\ensuremath{\gamma}$ is the surface tension and $\ensuremath{\theta}$ the angle of contact. The quantity ($\frac{\ensuremath{\gamma}cos\ensuremath{\theta}}{2\ensuremath{\eta}}$) is called the coefficient of penetrance or the penetrativity of the liquid.Penetration of Liquids into a Porous Body.---(1) Theory. If a porous body behaves as an assemblage of very small cylindrical capillaries, the volume which penetrates in a time $t$ would be proportional to the square root of ($\frac{\ensuremath{\gamma}t}{\ensuremath{\eta}}$). (2) Experiments with mercury, water and other liquids completely verify the theoretical deductions.Dynamic capillary method of measuring surface tension is described. It possesses certain advantages on the static method of capillary rise.

5,658 citations


"Permeability in Rotliegend gas sand..." refers background in this paper

  • ...Capillary pressure can be related to pore radius, , by the Washburn (1921) equation: ( )2 cos c r P γ θ = − Eq....

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Journal ArticleDOI
30 Jun 2012

1,428 citations


"Permeability in Rotliegend gas sand..." refers background in this paper

  • ...1.4.1 Permeability modelling: gas slip Gas slip contributes to a higher apparent permeability to gas, due to a non-zero velocity on the pore fluid interface (Klinkenberg, 1941)....

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Journal Article
TL;DR: The standard procedure for determining the permeability of porous media according to APZ Code No. 27 (first edition, October 1935) is based on the fundamental assumption that, as long as the rate of flow is proportional to the pressure gradient as mentioned in this paper.
Abstract: The standard procedure for determining the permeability of porous media according to APZ Code No. 27 (first edition, October 1935) is based on the fundamental assumption that, as long as the rate of flow is proportional to the pressure gradient, the permeability constant of a porous medium is a property of the medium, and is independent of the fluid used in its

1,297 citations

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