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TitlePoly-genetic stratigraphically controlled hydrocarbon accumulation within the Montney Formation, British Columbia: molecular, stable carbon isotope and petrographic evidence
 
AuthorCesar, JORCID logo; Ardakani, O HORCID logo
SourceGeoconvention 2021, abstracts; 2021 p. 1-2 Open Access logo Open Access
LinksOnline - En ligne
Image
Year2021
Alt SeriesNatural Resources Canada, Contribution Series 20210170
PublisherGeoConvention Partnership
MeetingGeoConvention 2021; September 13-15, 2021
Documentserial
Lang.English
Mediadigital; on-line
File formatpdf
ProvinceBritish Columbia
NTS93I; 93O; 93P; 94A; 94B; 94G; 94H; 94I; 94J
AreaFort St. John
Lat/Long WENS-123.0000 -120.0000 58.2500 54.5000
Subjectsfossil fuels; stratigraphy; geochemistry; sedimentology; Science and Technology; Nature and Environment; petroleum resources; hydrocarbons; hydrocarbon migration; stable isotope studies; carbon isotopes; petrographic analyses; stratigraphic analyses; core samples; pyrolysis; chromatography; mass spectrometer analysis; Montney Formation
ProgramGeoscience for New Energy Supply (GNES) Shale Reservoir Characterization
Released2021 09 01
Abstract(Summary)
The vast majority of hydrocarbons producing from the Montney Formation in British Columbia are considered to be originated from the thermal degradation of migrated hydrocarbons (e.g. Sanei et al., 2015; Wood and Sanei, 2016). However, uncertainties remain regarding how migrated hydrocarbons originally were distributed before degradation, as well as how hydrocarbon mixing (i.e. several migration stages) enabled the occurrence of highly productive stratigraphic intervals. In this study, we provide molecular, stable carbon isotopes, and petrographic data that answer some of these questions. Using samples from a core in British Columbia, we describe how within a 40 m section, one to two hydrocarbon charges accumulated in different stratigraphic intervals without thermal maturity control. Thermal degradation also seemed to occur in at least two stages (two solid bitumen populations). Hydrocarbon distribution within the Montney Formation is complex and the geochemical properties of produced fluids are often a representation of poly-genetic hydrocarbon accumulation that requires a rather detailed approach.
Summary(Plain Language Summary, not published)
The vast majority of hydrocarbons producing from the Montney Formation in British Columbia are considered to be originated from the thermal degradation of migrated hydrocarbons (e.g. Sanei et al., 2015; Wood and Sanei, 2016). However, uncertainties remain regarding how migrated hydrocarbons originally distributed before degradation, as well as how hydrocarbon mixing (i.e. several migration stages) enabled the occurrence of highly productive stratigraphic intervals. In this study, we provide molecular, stable carbon isotopes, and petrographic data that answer some of these questions using samples from a core in British Columbia.
GEOSCAN ID328611

 
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