| Titre | Hydrogen sulfide (H2S) distribution in the Triassic Montney Formation of the Western Canadian Sedimentary Basin |
| Télécharger | Téléchargement (publication entière) |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Kingston, A W ;
Mort, A; Deblonde, C; Ardakani, O H |
| Source | Hydrogen sulfide (H2S) in the Montney Formation, Western Canada Sedimentary Basin (WCSB) - investigating a complex issue, workshop proceeding; par Ardakani, O H (éd.); Pedersen, P K (éd.); Commission géologique du Canada, Dossier public 8878, 2022 p. 60-65, https://doi.org/10.4095/329797  Accès ouvert |
| Année | 2022 |
| Éditeur | Ressources naturelles Canada |
| Réunion | Montney H2S, Distribution and Origin Workshop; Calgary, AB; CA; février 9, 2022 |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/329797 |
| Media | numérique; en ligne |
| Référence reliée | Cette publication est contenue dans Hydrogen
sulfide (H2S) in the Montney Formation, Western Canada Sedimentary Basin (WCSB) - investigating a complex issue, workshop proceeding |
| Formats | pdf |
| Province | Alberta; Colombie-Britannique |
| SNRC | 83C; 83E; 83F; 83G; 83J; 83K; 83L; 83M; 83N; 83O; 84B; 84C; 84D; 84E; 84F; 84G; 84L; 93I; 93O; 93P; 94A; 94B; 94G; 94H; 94I; 94J |
| Région | Fort St. John; Dawson Creek; Grande Prairie; Whitecourt; Rivière de la Paix; Edson; Hinton |
| Lat/Long OENS | -123.5000 -115.7500 59.0000 53.0000 |
| Sujets | Trias inférieur; bassins sédimentaires; ressources pétrolières; hydrocarbures; reservoirs; hydrogene sulfuré; puits; fluides du réservoir; roches mères; établissement de modèles; analyses statistiques;
Formation de Montney ; Bassin sédimentaire de l'ouest du Canada; Contrôle de la qualité; combustibles fossiles; géochimie; Sciences et technologie; Nature et environnement; Phanérozoïque; Mésozoïque; Trias |
| Illustrations | cartes géolscientiques généralisées |
| Programme | Les géosciences de l'énergie Ressources d'énergie propre - réduire les risques environnementaux |
| Diffusé | 2022 03 22 |
| Résumé | (disponible en anglais seulement)
The Montney Formation is a highly productive hydrocarbon reservoir with significant reserves of hydrocarbon gases and liquids making it of great economic
importance to Canada. However, high concentrations of hydrogen sulfide (H2S) have been encountered during exploration and development that have detrimental effects on environmental, health, and economics of production. H2S is a highly toxic and
corrosive gas and therefore it is essential to understand the distribution of H2S within the basin in order to enhance identification of areas with a high risk of encountering elevated H2S concentrations in order to mitigate against potential
negative impacts.
Gas composition data from Montney wells is routinely collected by operators for submission to provincial regulators and is publicly available. We have combined data from Alberta (AB) and British Columbia (BC) to create a
basin-wide database of Montney H2S concentrations. We then used an iterative quality control and quality assurance process to produce a dataset that best represents gas composition in reservoir fluids. This included: 1) designating gas source
formation based on directional surveys using a newly developed basin-wide 3D model incorporating AGS's Montney model of Alberta with a model in BC, which removes errors associated with reported formations; 2) removed injection and disposal wells; 3)
assessed wells with the 50 highest H2S concentrations to determine if gas composition data is accurate and reflective of reservoir fluid chemistry; and 4) evaluated spatially isolated extreme values to ensure data accuracy and prevent isolated highs
from negatively impacting data interpolation. The resulting dataset was then used to calculate statistics for each x, y location to input into the interpolation process. Three interpolations were constructed based on the associated phase
classification: H2S in gas, H2S in liquid (C7+), and aqueous H2S. We used Empirical Bayesian Kriging interpolation to generate H2S distribution maps along with a series of model uncertainty maps.
These interpolations illustrate that H2S is
heterogeneously distributed across the Montney basin. In general, higher concentrations are found in AB compared with BC with the highest concentrations in the Grande Prairie region along with several other isolated region in the southeastern portion
of the basin. The interpolations of H2S associated with different phases show broad similarities. Future mapping research will focus on subdividing intra-Montney sub-members plus under- and overlying strata to further our understanding of the role
migration plays in H2S distribution within the Montney basin. |
| Sommaire | (Résumé en langage clair et simple, non publié)
L'origine et la distribution du sulfure d'hydrogène (H2S) - un gaz hautement toxique et corrosif présent dans les ressources conventionnelles et
non conventionnelles du bassin sédimentaire de l'Ouest canadien - ont fait l'objet de nombreuses études. La formation de Montney du Trias précoce, l'une des principales ressources en gaz non conventionnel d'Amérique du Nord, contient une quantité
importante de H2S dans certaines zones. Plusieurs équipes de recherche de l'Ouest canadien, dont la Commission géologique du Canada, l'Université de Calgary et l'Université de la Colombie-Britannique, étudient cette question complexe. Cet atelier
permettra de discuter des dernières avancées scientifiques sur ce sujet afin de mieux comprendre la distribution, l'origine et les stratégies d'atténuation pour surmonter les problèmes économiques et environnementaux associés. Ce rapport de dossier
public présente le compte rendu de l'atelier en ligne << Hydrogen sulfide (H2S) in the Montney Formation - investigating a complex issue >> qui a eu lieu le 9 février 2022 à Calgary (Alberta) et qui a été organisé par la Canadian Society for
Unconventional Resources (CSUR), Ressources naturelles Canada (RNCan) et l'Université de Calgary. |
| GEOSCAN ID | 329797 |
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