Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023425 |
Predicting Effective Diffusion Coefficients in Mudrocks Using a Fractal Model and Small-Angle Neutron Scattering Measurements | |
Busch, A.1; Kampman, N.2; Bertier, P.3; Pipich, V.4; Feoktystov, A.4; Rother, G.5; Harrington, J.6; Leu, L.7; Aertens, M.8; Jacops, E.8 | |
2018-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:9页码:7076-7091 |
文章类型 | Article |
语种 | 英语 |
国家 | Scotland; Netherlands; Germany; USA; England; Belgium |
英文摘要 | The determination of effective diffusion coefficients of gases or solutes in the water-saturated pore space of mudrocks is time consuming and technically challenging. Yet reliable values of effective diffusion coefficients are important to predict migration of hydrocarbon gases in unconventional reservoirs, dissipation of (explosive) gases through clay barriers in radioactive waste repositories, mineral alteration of seals to geological CO2 storage reservoirs, and contaminant migration through aquitards. In this study, small-angle and very small angle neutron scattering techniques have been utilized to determine a range of transport properties in mudrocks, including porosity, pore size distributions, and surface and volume fractal dimensions of pores and grains, from which diffusive transport parameters can be estimated. Using a fractal model derived from Archie's law, we calculate effective diffusion coefficients from these parameters and compare them to laboratory-derived effective diffusion coefficients for CO2, H-2, CH4, and HTO on either the same or related mudrock samples. The samples include Opalinus Shale from the underground laboratory in Mont Terri, Switzerland, Boom Clay from a core drilled in Mol, Belgium, and a marine claystone cored in Utah, USA. The predicted values were compared to laboratory diffusion measurements. The measured and modeled diffusion coefficients show good agreement, differing generally by less than factor 5. Neutron or X-ray scattering analysis is therefore proposed as a novel method for fast, accurate estimation of effective diffusion coefficients in mudrocks, together with simultaneous measurement of multiple transport parameters including porosity, pore size distributions, and surface areas, important for (reactive) transport modeling. |
英文关键词 | mudrock fractal diffusion small-angle neutron scattering tortuosity |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448088100068 |
WOS关键词 | NATURAL CO2 RESERVOIR ; LIGHT-HYDROCARBONS ; ARGILLACEOUS ROCKS ; OPALINUS-CLAY ; MONT-TERRI ; BOOM CLAY ; PORE ; SOIL ; TRANSPORT ; SURFACE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21443 |
专题 | 资源环境科学 |
作者单位 | 1.Heriot Watt Univ, Lyell Ctr, Res Ave South, Edinburgh, Midlothian, Scotland; 2.Shell Global Solut Int BV, Rijswijk, Netherlands; 3.Rhein Westfal TH Aachen, Clay & Interface Mineral, Aachen, Germany; 4.Forschungszentrum Julich, JCNS, Heinz Maier Leibnitz Zentrum MLZ, Garching, Germany; 5.Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN USA; 6.British Geol Survey, Environm Sci Ctr, Nottingham, England; 7.Imperial Coll London, Dept Earth Sci & Engn, London, England; 8.Belgian Nucl Res Ctr SCK CEN, Mol, Belgium |
推荐引用方式 GB/T 7714 | Busch, A.,Kampman, N.,Bertier, P.,et al. Predicting Effective Diffusion Coefficients in Mudrocks Using a Fractal Model and Small-Angle Neutron Scattering Measurements[J]. WATER RESOURCES RESEARCH,2018,54(9):7076-7091. |
APA | Busch, A..,Kampman, N..,Bertier, P..,Pipich, V..,Feoktystov, A..,...&Jacops, E..(2018).Predicting Effective Diffusion Coefficients in Mudrocks Using a Fractal Model and Small-Angle Neutron Scattering Measurements.WATER RESOURCES RESEARCH,54(9),7076-7091. |
MLA | Busch, A.,et al."Predicting Effective Diffusion Coefficients in Mudrocks Using a Fractal Model and Small-Angle Neutron Scattering Measurements".WATER RESOURCES RESEARCH 54.9(2018):7076-7091. |
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