Conference paper
Gas geochemistry and the origins of H2S in the Montney Formation
Hydrogen sulfide (H2S) in the Montney Formation, Western Canada Sedimentary Basin (WCSB) - investigating a complex issue, workshop proceeding , pp.37-44
Montney H2S, Distribution and Origin Workshop, 2022 (Calgary, 09-Feb-2022)
Geological Survey of Canada
2022
Abstract
The geology of the Montney Formation and the geochemistry of its produced fluids, including nonhydrocarbon gases such as hydrogen sulfide were investigated for both Alberta and BC play areas. Key parameters for understanding a complex petroleum system like the Montney play include changes in thickness, depth of burial, mass balance calculations, timing and magnitudes of paleotemperature exposure, as well as kerogen concentration and types to determine the distribution of hydrocarbon composition, H2S concentrations and CO2 concentrations. Results show that there is first-, second- and third- order variations in the maturation patterns that impact the hydrocarbon composition. Isomer ratio calculations for butane and propane, in combination with excess methane estimation from produced fluids, are powerful tools to highlight effects of migration in the hydrocarbon distribution. The presentday distribution of hydrocarbons is a result of fluid mixing between hydrocarbons generated in-situ with shorter-chained hydrocarbons (i.e., methane) migrated from deeper, more mature areas proximal to the deformation front, along structural elements like the Fort St. John Graben, as well as through areas of lithology with higher permeability.
Details
- Title
- Gas geochemistry and the origins of H2S in the Montney Formation
- Authors
- Pablo Lacerda Silva (Corresponding Author) - University of British ColumbiaGareth R Chalmers (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringAmanda M M Bustin (Author) - University of British ColumbiaRobert M Bustin (Author) - University of British Columbia
- Contributors
- O H Ardakani (Editor) - Geological Survey of CanadaP K Pedersen (Editor) - University of Calgary
- Publication details
- Hydrogen sulfide (H2S) in the Montney Formation, Western Canada Sedimentary Basin (WCSB) - investigating a complex issue, workshop proceeding , pp.37-44
- Conference details
- Montney H2S, Distribution and Origin Workshop, 2022 (Calgary, 09-Feb-2022)
- Publisher
- Geological Survey of Canada
- DOI
- 10.4095/329794
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99984950602621
- Output Type
- Conference paper
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