Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock
An experimental characterisation of a low permeability caprock is first reported. Two different methods are compared to measure the porosity: water imbibition and weighting versus gas (Argon) pycnometry. Water measured porosities appear to systematically underestimate gas measured porosities. A capi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2016-07-01
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| Series: | Oil & Gas Science and Technology |
| Online Access: | http://dx.doi.org/10.2516/ogst/2016007 |
| _version_ | 1818360518324256768 |
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| author | Bignonnet François Duan Zhibo Egermann Patrick Jeannin Laurent Skoczylas Frédéric |
| author_facet | Bignonnet François Duan Zhibo Egermann Patrick Jeannin Laurent Skoczylas Frédéric |
| author_sort | Bignonnet François |
| collection | DOAJ |
| description | An experimental characterisation of a low permeability caprock is first reported. Two different methods are compared to measure the porosity: water imbibition and weighting versus gas (Argon) pycnometry. Water measured porosities appear to systematically underestimate gas measured porosities. A capillary pressure curve is derived from successive equilibrium of samples at imposed relative humidities. The relative gas permeability is thoroughly measured on the same samples. Gas porosity and effective gas permeability measurements have been carried out under different confining pressures. All measured relative gas permeabilities lie on a master curve and present a low critical water saturation beyond which the effective gas permeability nearly vanishes. In an attempt to model this last feature, the salient properties of the microstructure are extracted from electron microscopy images to propose a micro-macro model of the relative gas permeability. The multi-scale modeling is performed within the framework of random media or so-called continuum micromechanics, including localised flow effects within interfaces. The self-consistent homogenisation scheme allows retrieval of a critical water saturation, whose value is governed by the shape of the elementary particles of the material and the localisation of water within the pore space. |
| first_indexed | 2024-12-13T21:02:04Z |
| format | Article |
| id | doaj.art-ebef1f7d19904853b897c5ea115169ce |
| institution | Directory Open Access Journal |
| issn | 1294-4475 1953-8189 |
| language | English |
| last_indexed | 2024-12-13T21:02:04Z |
| publishDate | 2016-07-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Oil & Gas Science and Technology |
| spelling | doaj.art-ebef1f7d19904853b897c5ea115169ce2022-12-21T23:31:34ZengEDP SciencesOil & Gas Science and Technology1294-44751953-81892016-07-017145510.2516/ogst/2016007ogst150095Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a CaprockBignonnet FrançoisDuan ZhiboEgermann PatrickJeannin LaurentSkoczylas FrédéricAn experimental characterisation of a low permeability caprock is first reported. Two different methods are compared to measure the porosity: water imbibition and weighting versus gas (Argon) pycnometry. Water measured porosities appear to systematically underestimate gas measured porosities. A capillary pressure curve is derived from successive equilibrium of samples at imposed relative humidities. The relative gas permeability is thoroughly measured on the same samples. Gas porosity and effective gas permeability measurements have been carried out under different confining pressures. All measured relative gas permeabilities lie on a master curve and present a low critical water saturation beyond which the effective gas permeability nearly vanishes. In an attempt to model this last feature, the salient properties of the microstructure are extracted from electron microscopy images to propose a micro-macro model of the relative gas permeability. The multi-scale modeling is performed within the framework of random media or so-called continuum micromechanics, including localised flow effects within interfaces. The self-consistent homogenisation scheme allows retrieval of a critical water saturation, whose value is governed by the shape of the elementary particles of the material and the localisation of water within the pore space.http://dx.doi.org/10.2516/ogst/2016007 |
| spellingShingle | Bignonnet François Duan Zhibo Egermann Patrick Jeannin Laurent Skoczylas Frédéric Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock Oil & Gas Science and Technology |
| title | Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock |
| title_full | Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock |
| title_fullStr | Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock |
| title_full_unstemmed | Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock |
| title_short | Experimental Measurements and Multi-Scale Modeling of the Relative Gas Permeability of a Caprock |
| title_sort | experimental measurements and multi scale modeling of the relative gas permeability of a caprock |
| url | http://dx.doi.org/10.2516/ogst/2016007 |
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