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TitleAn organic geochemical investigation of the Carboniferous Mabou Group intersected by groundwater wells in McCully Gas Field, southern New Brunswick - its hydrocarbon source potential and character
AuthorJiang, C; Lavoie, D; Rivard, C
SourceGeological Survey of Canada, Open File 8071, 2016, 34 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
File formatpdf
ProvinceNew Brunswick
NTS21H; 21I/01; 21I/02; 21I/03; 21I/04
AreaMoncton; Sussex
Lat/Long WENS-66.0000 -63.5000 46.5000 45.5000
Subjectsfossil fuels; stratigraphy; geochemistry; structural geology; hydrocarbons; hydrocarbon potential; hydrocarbon gases; organic geochemistry; gas chromatography; chromatographic analyses; chromatography; fluid inclusions; tectonostratigraphic zones; hydrocarbon maturation; stratigraphic correlations; stratigraphic analyses; Mabou Group; McCully gas field; Windsor Group; Macumber Formation; Weldon Formation; Mil Brock Formation; Bloomfield Formation; Albert Formation; Paleozoic; Carboniferous
Illustrationslocation maps; tables; cross-sections; chromatograms
Natural Resources Canada Library - Ottawa (Earth Sciences)
ProgramShale Gas - New Brunswick aquifers, Environmental Geoscience
Released2016 06 21
AbstractWater wells were drilled in November 2015 over the McCully gas field in southern New Brunswick as part of the Geological Survey of Canada (GSC) Environmental Geoscience program. Drill cuttings were collected and immediately put in Isojars at the well sites. Cuttings samples from PO-01 to PO-06 wells have been submitted to the Organic Geochemistry and Petrology Laboratories at the GSC-Calgary for Rock-Eval and hydrocarbon compositional analyses to evaluate their hydrocarbon potential, hydrocarbon property and source rock characteristics. Cuttings from one well (PO-06) have generated results indicative of presence of organic matter and hydrocarbons in the rock although no dissolved hydrocarbons were detected in groundwater at the well site. New Rock-Eval analyses were carried out on the cuttings as well as organic extracts and detailed geochemistry to further address the issue of either in situ hydrocarbon production or external hydrocarbon charge into the sediments.
Summary(Plain Language Summary, not published)
Drill cutting samples from shallow water wells drilled over the McCully Gas field in southern New Brunswick have been submitted for organic geochemical analysis within the framework of an environmental study to investigate the presence of hydrocarbons and identify their source. Current results show no hydrocarbon potential for the intersected Carboniferous Mabou Group sedimentary rocks at PO-01 to PO-05 wells. Well cuttings from PO-06 wells contain low content early mature organic matter and volatiles hydrocarbons for which the origin is uncertain. The small amount of heavy hydrocarbons hosted in the PO-06 Mabou Group sedimentary rocks may be a mixture of low maturity oil generated locally in the Mabou Group mudstones and biodegraded oil migrated from deeper source rocks.