| Title | The significance of light hydrocarbon geochemistry for the assessment of low-permeability reservoirs of the Montney Formation, WCSB |
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| Author | Cesar, J ; Jiang,
C; Deblonde, C; Ardakani, O H |
| 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 20210163 |
| Publisher | GeoConvention Partnership |
| Meeting | Geoconvention 2021; September 13-15, 2021 |
| Document | Web site |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | Alberta; British Columbia |
| NTS | 83C; 83E; 83F; 83K; 83L; 83M; 83N; 84C; 84D; 84E; 84L; 93J; 93O; 93P; 94A; 94B; 94G; 94H; 94I; 94J |
| Area | Grande Prairie; Fort St. John |
| Lat/Long WENS | -123.0000 -116.2500 58.2500 52.7500 |
| Subjects | fossil fuels; geochemistry; Science and Technology; Nature and Environment; petroleum resources; hydrocarbons; gas; oil; reservoir rocks; organic geochemistry; isotopic studies; carbon isotopes; source
rocks; thermal maturation; Montney Formation; Western Canada Sedimentary Basin; Duvernay Formation; Bakken Formation; Methodology |
| Program | Geoscience for New Energy Supply (GNES) Shale Reservoir Characterization |
| Released | 2021 09 01 |
| Abstract | (Summary)
Conducting geochemical correlation studies on the Montney Formation continues to be restrained by the low concentration of biomarkers in many of the unconventional gas/condensate
accumulations. Such limitation not only restricts fluid-source correlation for currently producing gas/condensate fields but also makes it impossible to be compared with previous correlations established for conventional fields in the past decades
(which were based on biomarker data). An approach to overcome this obstacle relies on the evaluation of low-molecular weight (LMW) compounds for geochemical assessment, as the LMW compounds occur in the entire range of liquid petroleum (crude oil to
condensate). In this study, we present the distribution of selected light hydrocarbon parameters (molecular indices based on LMW components in the C7-C15 range) in a regional sample set from low-permeability Montney Formation reservoirs.
Additionally, we investigate the compound specific carbon isotope profiles of some of these samples and how they compare with that of the fluids from other source rocks such as the Duvernay Formation and the Bakken Formation. Liquid petroleum from
Montney Formation exhibits a large variability in their light hydrocarbon properties. These parameters do not seem to be controlled by thermal maturity effects, at least not regionally. Mapping of molecular indices also shows that they do not
correlate with each other and may indicate different geochemical processes. Our current stage of research opens a new path for geochemical evaluation of the Montney Formation's assets. |
| Summary | (Plain Language Summary, not published)
Conducting geochemical correlation studies on the Montney Formation continues to be restrained by the low concentration of biomarkers in many of the
unconventional gas/condensate accumulations. Such limitation not only restricts fluid-source correlation for currently producing gas/condensate fields but also makes it impossible to be compared with previous correlations established for conventional
fields in the past decades (which were based on biomarker data). An approach to overcome this obstacle relies on the evaluation of low-molecular weight (LMW) compounds for geochemical assessment, as the LMW compounds occur in the entire range of
liquid petroleum (crude oil to condensate). This study applies molecular and carbon isotope geochemistry of LMW hydrocarbons from the Montney Formation for petroleum assessment. |
| GEOSCAN ID | 328592 |
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