| Titre | Intraformational migration of oil, gas-condensate and methane-rich gas in the Montney unconventional petroleum fairway |
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| Auteur | Wood, J M; Euzen, T; Cesar, J ; Ardakani, O H; Rudra, A; Sanei, H |
| Source | Geoconvention 2023, abstracts; 2023 p. 1 |
| Image |  |
| Année | 2023 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20220522 |
| Réunion | Geoconvention 2023; Calgary; CA; mai 15-17, 2023 |
| Document | livre |
| Lang. | anglais |
| Media | papier; numérique; en ligne |
| Formats | pdf |
| Province | 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 |
| Lat/Long OENS | -123.5000 -115.7500 59.0000 53.0000 |
| Sujets | gaz; présence de pétrole; ressources pétrolières; méthane; méthane hydraté; hydrocarbures; Formation de Montney ; Bassin sédimentaire de l'ouest du Canada; combustibles fossiles; Trias |
| Programme | Les géosciences de l'énergie Ressources d'énergie propre - réduire les risques environnementaux |
| Diffusé | 2023 05 15 |
| Résumé | (disponible en anglais seulement)
The Early Triassic Montney Formation of the Western Canada Sedimentary Basin had a complex history of petroleum charging from both external and internal source
rocks. Recent geochemical studies across the Montney unconventional petroleum fairway recognize three main widespread episodes of internal (intraformational) migration of hydrocarbons (Figures 1, 2). The first episode was oil migration from distal
Montney organic-rich source rocks during rapid burial (Euzen et al., 2018; Laycock et al., 2021; Watt et al., 2022). The second episode was gas-condensate migration during overpressuring close to the time of maximum burial (Wood et al., 2022). The
final episode was methane-rich gas migration mainly during basin uplift and depressurization (Wood and Sanei, 2016, 2017; Sereda and Fur, 2017; Euzen et al., 2018, 2019, 2020, 2021; Wood et al., 2021; Chalmers et al., 2022). This presentation will
review the geological and geochemical evidence for these three main episodes of intraformational hydrocarbon migration and discuss their temporal and spatial context within the Montney unconventional petroleum play.
Present-day oil, condensate,
wet gas and dry gas reservoir-fluid windows in the Montney Formation generally align with depth and thermal maturity trends increasing to the southwest (Figure 1). However, the composition and distribution of Montney hydrocarbon fluids determined by
thermal maturity were significantly modified by gas-condensate migration during deep burial (Kuppe et al., 2012; Wood et al., 2022) and later by migration of methane-rich gas (Wood and Sanei, 2016; Euzen et al., 2018; Wood et al., 2022) during uplift
(Figures 1, 2). Regional mapping of Montney produced gas composition shows that the late-stage migration of methane-rich gas was enhanced along intricate, stratigraphically and structurally controlled pathways (red arrows, Figure 1). These dry gas
migration pathways have direct economic impacts on well performance such as higher gas-oil ratios and lower hydrocarbon liquid contents than expected from routine thermal maturity proxies (Wood and Sanei, 2017; Wood et al., 2021).
Although our
knowledge of intraformational hydrocarbon migration in the Montney unconventional petroleum play has advanced in recent years, there is still much to unravel. A key aspect that is currently not well understood is how the intimate co-existence of
unconfined macropores and confined nanopores differentially controlled the migration and partitioning of hydrocarbon fluids (e.g., Alharthy et al., 2016). Improved understanding of micro-scale heterogeneity in hydrocarbon fluid distribution,
particularly in the context of dynamic (non-equilibrium) PVT conditions through burial and uplift, will help to clarify the range and complexity of phase behaviour and production characteristics observed in this world-class unconventional petroleum
play. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Ce résumé d'une présentation de conférence traite de la migration intraformationnelle du gaz et des condensats dans la formation de Montney, la
principale ressource de gaz naturel au Canada qui a une implication majeure dans la fourniture de ressources énergétiques à faible teneur en carbone. |
| GEOSCAN ID | 331358 |
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