| Titre | Comparing simulated shallow subsurface spills of diluted bitumen and conventional crude oil |
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| Auteur | Utting, N ;
Namsechi, B; McMullen, C; Brydie, J; Ahad, J M E |
| Source | Journal of Contaminant Hydrology vol. 251, 104099, 2022 p. 1-14, https://doi.org/10.1016/j.jconhyd.2022.104099  Accès ouvert |
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| Année | 2022 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20220488 |
| Éditeur | Elsevier B.V. |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1016/j.jconhyd.2022.104099 |
| Media | papier; numérique; en ligne |
| Formats | pdf; html |
| Sujets | bitume; Sciences et technologie; combustibles fossiles |
| Illustrations | diagrammes; diagrammes; graphiques; photographies; représentations graphiques combinées; tableaux |
| Programme | CanmetÉNERGIE - Devon Directeur, Directeur, Impacts en amont et environnementaux - Opérations en amont et impacts environnementaux |
| Diffusé | 2022 11 08 |
| Résumé | (disponible en anglais seulement)
Increased oil production in Canada has resulted in proposals to extend or develop new oil pipelines. Many of these proposals have been met by concerns from the
public over potential environmental impacts related to construction and the potential for oil spills to negatively affect groundwater quality. Crude oil sourced from the Alberta oil sands represents a significant proportion of this increase in
production. This crude oil is produced as bitumen, which is subsequently diluted with light hydrocarbons to lower viscosity to allow for pipeline transport producing diluted bitumen. In this study, we pumped water through tanks filled with sand to
simulate groundwater flow. Tanks were injected with either conventional crude or diluted bitumen to simulate a crude oil spill from a pipeline rupture occurring below the water table representing a pipeline river crossing scenario. Water samples were
collected from the downstream end of the tanks throughout the experiment period (~two months). Compared to water quality guidelines, effluent waters from both conventional crude and diluted bitumen tanks contained elevated concentrations of dissolved
organic compounds, particularly benzene, ethylbenzene, toluene and xylenes (BTEX). The effluent from each tank had similar concentrations of benzene, whereas discharge water from conventional crude tanks contained higher concentrations of
ethylbenzene, toluene and xylenes. In both tanks, and as expected, the BTEX concentrations appeared to be proportional to those determined in their injected crude oils. The measured dissolved concentrations of benzene, ethylbenzene and toluene are
lower than predicted which is attributed largely due to dilution along the flow path. In addition to organic constituents, effluent sampled from the diluted bitumen tank contained some metals (Co, Cr, Fe and V) which measured constituents of the
oil. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Le bitume, produit à partir des sables bitumineux, a une viscosité trop élevée pour être transporté par pipeline. Ainsi, le bitume est souvent
dilué à l'aide d'hydrocarbures légers pour devenir ce qu'on appelle du bitume dilué, destiné au transport. Il existe un risque de déversement de bitume dilué provenant des pipelines. Si un déversement se produisait sur terre, il est possible qu'un
déversement ait un impact sur les ressources en eau souterraine. Cet article présente des expériences de laboratoire utilisées pour fournir une comparaison entre un déversement de pétrole brut conventionnel et de bitume dilué. |
| GEOSCAN ID | 331318 |
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