| Title | Vertical and lateral facies heterogeneities within the Montney Formation of NE BC: implications for fluid mapping |
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| Author | Mackie, S J; Furlong, C M; Ardakani, O H ; Pedersen, P K |
| Source | GeoConvention 2021, abstracts; 2021 p. 1-2  Open
Access |
| Links | Online - En ligne
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| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20210353 |
| Publisher | GeoConvention Partnership |
| Meeting | GeoConvention 2021; September 13-15, 2021 |
| Document | Web site |
| Lang. | English |
| Media | digital; on-line |
| File format | pdf |
| Province | British Columbia |
| NTS | 93I; 93O; 93P; 94A; 94B; 94G; 94H; 94I; 94J |
| Area | Dawson Creek; Parkland |
| Lat/Long WENS | -123.0000 -120.0000 58.2500 54.5000 |
| Subjects | fossil fuels; stratigraphy; structural geology; geochemistry; geophysics; Science and Technology; Nature and Environment; petroleum resources; hydrocarbons; sedimentary facies; reservoir rocks;
reservoir fluids; mapping techniques; hydrogen sulphide; fluid migration; bedrock geology; lithology; sedimentary rocks; evaporites; structural features; fractures; permeability; core samples; geophysical logging; Montney Formation; Phanerozoic;
Mesozoic; Triassic; Paleozoic; Devonian |
| Program | Energy Geoscience Clean Energy Resources - Decreasing Environmental Risk |
| Released | 2021 09 01 |
| Abstract | Within individual stratigraphic units, understanding vertical and lateral heterogeneities are key in mapping and predicting fluid distributions. The regional stratigraphy of the Lower Triassic Montney
Formation has been well established as three 3rd order sequences, the Lower, Middle, and Upper (e.g. Crombez et al., 2016; Davies et al., 2018; Henderson et al., 2018; Zonneveld and Moslow, 2018). Within each of the three Montney members, locally
high concentrations of hydrogen sulfide (H2S) are present, however, there are few published studies on the origin and distribution of H2S in the Montney (Desrocher et al., 2004). Previous studies placed data within each Montney member but did not
account for multiple high permeability zones with variable H2S concentration within each member (Chalmers et al., 2019). Recent petrographic and isotopic analyses by Liseroudi et al. (2020, 2021), have shown part of sulfate-rich fluids that led to
formation of Montney's H2S to be sourced from underlying Devonian evaporites, implying fluid migration through fracture systems. Thus, the mapping of structures and fracture systems and understanding stratigraphic permeability distributions is
crucial for predicting elevated H2S occurrence within the Montney Formation.
This study investigates the vertical and lateral facies variations within the Dawson - Parkland area of northeastern British Columbia at a local scale. By connecting
facies identified in core to wireline log responses, facies can be mapped throughout a study area. Detailed facies mapping allows for a better understanding of the vertical and lateral heterogeneities present within an individual Montney member. A
refined understanding of the facies variations present within a single Montney member allows for more accurate fluid distribution mapping. Improved fluid mapping is key in understanding the geologic processes that create areas of elevated H2S within
the Montney Formation. |
| Summary | (Plain Language Summary, not published)
Within individual stratigraphic units, understanding vertical and lateral heterogeneities are key in mapping and predicting fluid distributions. A
refined understanding of the facies variations present within a single Montney member allows for more accurate fluid distribution mapping. Improved fluid mapping is key in understanding the geologic processes that create areas of elevated H2S within
the Montney Formation. |
| GEOSCAN ID | 329037 |
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