Growth-faulted shelf-margin deltas: a new (but old) play type, offshore Nova Scotia

Research Article| September 01, 2005 Growth-faulted shelf-margin deltas: a new (but old) play type, offshore Nova Scotia Don I. Cummings; Don I. Cummings Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5 *Current address: Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, ON K7L 3N6 Search for other works by this author on: GSW Google Scholar R. William C. Arnott R. William C. Arnott Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5 Search for other works by this author on: GSW Google Scholar Author and Article Information Don I. Cummings *Current address: Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, ON K7L 3N6 Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5 R. William C. Arnott Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5 Publisher: Canadian Energy Geoscience Association Received: 10 Feb 2005 Accepted: 02 Jun 2005 First Online: 02 Mar 2017 Online ISSN: 2368-0261 Print ISSN: 0007-4802 © The Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2005) 53 (3): 211–236. https://doi.org/10.2113/53.3.211 Article history Received: 10 Feb 2005 Accepted: 02 Jun 2005 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Don I. Cummings, R. William C. Arnott; Growth-faulted shelf-margin deltas: a new (but old) play type, offshore Nova Scotia. Bulletin of Canadian Petroleum Geology 2005;; 53 (3): 211–236. doi: https://doi.org/10.2113/53.3.211 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract Shelf-margin deltas have not been explicitly recognized as a play type in the passive margin basin offshore Nova Scotia, perhaps because Mesozoic shelf-margin positions are rarely well resolved in seismic data. It is argued, however, that several of the largest gas accumulations offshore Nova Scotia (Venture, Alma, Glenelg) occur in growth-faulted shelf-margin delta complexes that formed at or near the paleoshelf edge during periods of low relative sea-level. Shelf-margin deltas are excellent exploration targets for several reasons: they commonly have laterally-extensive shale seals and expanded sandstone reservoirs, are associated with early movement on growth fault structures, and are commonly overpressured. Also, because they commonly link downdip to sand accumulations on the slope and basin floor, identification of shelf margin depocentres can help identify the location of "deep-water" exploration targets. Criteria that have proved useful in identifying shelf-margin deltas offshore Nova Scotia include: (1) proximity to large-scale (i.e. at least several hundred metres relief) basinward-dipping slope reflections; (2) association with large-scale listric growth faults; (3) evidence of delta-front/prodelta gravity-flow deposition in core; (4) relatively large scale upward-coarsening deltaic/shoreface successions (several tens-of-metres to over two hundred metres thick); and (5) paleoecological evidence for rapid shallowing.Recognition of the growth-faulted shelf-margin play type will not only improve exploitation strategies in offshore Nova Scotia, but provide an important framework to guide the identification of new exploration opportunities in genetically-related parts of the stratigraphic section. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.