Sills in Sedimentary Basins and Petroleum Systems

Nick Schofield, Dougal Jerram, Simon Holford, Stuart Archer, Niall Mark, Adrian Hartley, John Howell, David Muirhead, Paul Green, Donald Hutton, Carl Stevenson

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Citations (Scopus)


Our knowledge of igneous emplacement in sedimentary basins has been
revolutionised by studies of offshore 3D seismic reflection data, where large
scale structures and relationships are realised. These offshore data sets require
detailed information from onshore analogues to fully understand subsurface
structure of such intrusions and their potential effect on petroleum systems.
The Inner Hebrides ofWestern Scotland,which contains an onshore record of
the extensive Palaeogene magmatic activity that affected much of the North
Atlantic, allows us to examine some of the classic sill geometries on a seismic
to sub-seismic (outcrop) scale. As hydrocarbon exploration moves to more
challenging basins, it is clear the need exists for us to fully understand the role
in which intrusive volcanism plays in active hydrocarbon systems. Intrusions
in general can have major effects on prospective sedimentary basins by
forming interconnected low-permeability zones which can compartmentalise
significant volumes of source and reservoir rock. We present a series of
outcrop case studies which allow the potential influences of sills on what
would represent potential source and reservoir rock intervals to be addressed
and discuss the wider implications for sill emplacement in such basins.
Original languageEnglish
Title of host publicationAdvances in Volcanology
Number of pages22
Publication statusPublished - 5 Apr 2016


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