Integrated Geological, Petrophysical and Geophysical Characterisation of a World Class Shale Gas Play, Horn River Basin, British Columbia, Canada

Potma, Ken; Jonk, R.; Davie, Matthew; Austin, Nick

doi:10.2523/16784-ms

Cited by 2 publications

(6 citation statements)

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“…The Horn River Formation, deposited in the Western Canada Sedimentary Basin, is one of the well-studied mudstone deposits in Canada. It is composed of an alternating sequence of siliceous mudstone, argillaceous mudstone, and calcareous mudstone [7][8][9][10]. Those are divided into the Evie Member, the Otter Park Member and the Muskwa Formation, in ascending order.…”

Section: Introductionmentioning

confidence: 99%

“…Those are divided into the Evie Member, the Otter Park Member and the Muskwa Formation, in ascending order. The geological characteristics of the Horn River Formation have been studied based on sedimentological descriptions, geochemical analysis, wireline log analysis, and sequence stratigraphic analysis [8,[10][11][12]. There have been several sequence stratigraphic interpretations of the Horn River Formation [8,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The geological characteristics of the Horn River Formation have been studied based on sedimentological descriptions, geochemical analysis, wireline log analysis, and sequence stratigraphic analysis [8,[10][11][12]. There have been several sequence stratigraphic interpretations of the Horn River Formation [8,[10][11][12]. The Evie Member was interpreted as deposited during a second-order highstand stage [8,10], and consists of a third-order transgressive systems tract (TST) and an overlying regressive systems tract (RST) [11].…”

Section: Introductionmentioning

confidence: 99%

“…There have been several sequence stratigraphic interpretations of the Horn River Formation [8,[10][11][12]. The Evie Member was interpreted as deposited during a second-order highstand stage [8,10], and consists of a third-order transgressive systems tract (TST) and an overlying regressive systems tract (RST) [11]. The Otter Park Member is interpreted as a second-order lowstand stage in the middle Devonian carbonate, and a transgressive stage in its upper part [8,10], consisting of a third-order T-R cycle [11].…”

Section: Introductionmentioning

confidence: 99%

“…The Evie Member was interpreted as deposited during a second-order highstand stage [8,10], and consists of a third-order transgressive systems tract (TST) and an overlying regressive systems tract (RST) [11]. The Otter Park Member is interpreted as a second-order lowstand stage in the middle Devonian carbonate, and a transgressive stage in its upper part [8,10], consisting of a third-order T-R cycle [11]. The overlying Muskwa Formation formed during the following second-order transgressive stage [8,10], accompanying a third-order TST and an overlying RST [11].…”

Section: Introductionmentioning

confidence: 99%

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Verification and Application of Sequence Stratigraphy to Reservoir Characterization of Horn River Basin, Canada

et al. 2022

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Shale reservoirs, the most important unconventional resource, are difficult to characterize. Shale formations require detailed interpretation of geological, petrophysical, and geochemical analyses, and an integration of these disciplines. In terms of geological interpretation, the commonly used sequence stratigraphy analysis includes a lithofacies analysis. The application of sequence stratigraphy to shales facilitates the ability to relate between lithofacies and mineral composition, petrophysical parameters, and kerogen contents, which are affected by depositional setting. The classification of lithofacies is indispensable for reservoir quality prediction. In this study, porosity, permeability, and TOC content largely depend on lithofacies, and their correlation coefficient is relatively high. The sequence stratigraphic interpretation shows that organic carbon content usually increases within the maximum flooding surfaces and decreases stepwise. However, the relationship between total organic carbon contents and systems tract is less direct and redox dependent.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Verification and Application of Sequence Stratigraphy to Reservoir Characterization of Horn River Basin, Canada

et al. 2022

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10 Canol Formation, Northwest Territories, Canada—An Outcrop-to-Subsurface Analog for the Paleozoic Horn River Shale-gas Play

Potma,

Jonk,

Bohacs

2022

Sequence Stratigraphy: Applications to Fine-Grained Rocks

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The Late Devonian Canol Formation and associated stratal units in the Northwest Territories of Canada illustrate the expression of sequence-stratigraphic surfaces and units in a distal Paleozoic carbonate shelf to relatively deep-basin setting. These Devonian strata are time equivalent and quite analogous in depositional conditions and petroleum-system characteristics to the proven shale-gas deposits in the Horn River Basin of northeastern British Columbia. The Canol Depositional Sequence spans the upper part of the Ramparts Formation, the Canol Formation, and the lowermost part of the Imperial Formation. This depositional sequence comprises a range of facies associations, spanning siliceous, calcareous, and argillaceous fine mudstone to sandy mudstone. Eight distinct facies associations can be identified, correlated, and mapped within the study area. These form the building blocks of a predictive understanding of the depositional system that is critical for resource identification, delineation, and development. These facies associations vary in a systematic and predictable manner both vertically and laterally within a sequence-stratigraphic framework. The strata record the interplay of intrabasin organic production (phytoplankton) and associated growth of zooplankton (mainly radiolaria and tentaculitids) versus extrabasinal detrital siliciclastic input (dominated by clay minerals), as well as input of carbonate sediment-gravity flows from pre-existing or age-equivalent platforms and buildups along the basin edges. The lowstand systems tract of the Canol Depositional Sequence contains mostly argillaceous-calcareous mudstone facies association with some transported benthic-carbonate material. The transgressive and lower highstand systems tracts contain the best reservoir potential as their composition is dominated by biogenic silica and organic matter. The upper highstand systems tract is influenced increasingly through dilution by detrital clay and silt, resulting in lower reservoir potential and higher seal potential. Laterally, time-equivalent strata are more biosiliceous away from input points of terrigenous clay minerals into the basin. Insights gained from constructing the sequence-stratigraphic framework were applied across the stratigraphic hierarchy from bed to sequence set, allowing integration of data from thin-section to seismic scale. Sequence-stratigraphic analysis was an important part of seismic inversion and rock-property mapping because it reveals genetically related rocks. This enables application of process-based models and incorporation of regional context and information about sedimentary provenance, paleogeography, and paleo-oceanography that are not discernible from seismic data alone.

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Integrated Geological, Petrophysical and Geophysical Characterisation of a World Class Shale Gas Play, Horn River Basin, British Columbia, Canada

Cited by 2 publications

References 0 publications

Verification and Application of Sequence Stratigraphy to Reservoir Characterization of Horn River Basin, Canada

Verification and Application of Sequence Stratigraphy to Reservoir Characterization of Horn River Basin, Canada

10 Canol Formation, Northwest Territories, Canada—An Outcrop-to-Subsurface Analog for the Paleozoic Horn River Shale-gas Play

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