The Schooner Field, Blocks 44/26a, 43/30a, UK North Sea

Abstract

The Schooner Field is Shell U.

Warwickshire Group (Pennsylvanian) red-beds of the Canonbie Coalfield, England–Scotland border, and their regional palaeogeographical implications

“…The Bolsovian-aged Cleaver Formation is a grey-bed succession, suggested to have been derived from a combination of detritus sourced from the Rinkøbing Fyn High to the northeast and from the Variscan orogenic belt (Saxo-Thuringian Zone) to the south (Morton, Hallsworth & Moscariello, 2005). The overlying red-bed facies of the Boulton Formation range from Bolsovian to Asturian in age and form the topmost Westphalian unit present in the UK sector of the southern North Sea (Moscariello, 2003;Besly, 2005).…”

“…Although the base of the Ketch Formation is defined as the lowest occurrence of primary red-bed facies (Cameron, 1993, p. 22), an angular unconformity is present at the base of the formation in condensed sections near sub-basin margins, for example, in blocks 44/13 and 44/14 (Besly, 1998;Moscariello, 2003;Jones, Allen & Morrison, 2005). Further south, in blocks 44/26 to 44/28, the Cambriense Marine Band is present and a thick coalbearing section occurs above it (B.…”

Porosity and Permeability Variations in a Tight Gas Sandstone Reservoir Analogue, Westphalian D, Lower Saxony Basin, Nw Germany: Influence of Depositional Setting and Diagenesis

“…The NW European Carboniferous Basin hosts degassing hard coal source rocks, seals and siliciclastic reservoir rocks, but major sections remain poorly characterized (Cameron and Ziegler, 1997;Kombrink, 2008). Tight gas reservoir rocks are reported to occur in the southern North Sea (Leeder and Hardman, 1990;Besly et al, 1993;Ritchie and Pratsides, 1993;Moscariello, 2003), in onshore UK and the Netherlands (Kombrink et al, 2007) and in Germany (Hollmann et al, 1997;Henk, 2005;Lüders et al, 2010;Wimmers and Koehrer, 2014) (Fig. 1a).…”

“…McBride, 1963;Leeder and Hardman, 1990;Bjørlykke, 1998;Morad et al, 2000;Morad et al, 2010). Reservoir quality is usually relatively high in aeolian and ephemeral fl uvial depositional systems (Cowan, 1993;Meadows and Beach, 1993;Olivarius et al, 2015) and in stacked braided channel facies (Moscariello, 2003;Yurewicz et al, 2008), due to relatively large grain sizes (Füchtbauer, 1974;Stroker et al, 2013; David, 1990). The Westphalian D succession is overlain by Permian Zechstein carbonates; the Stephanian corresponds to a hiatus.…”

“…The outcropping sandstones are recognized as potential analogues for the gas fields in NW Germany, the Netherlands, onshore UK and the North Sea (Fig. 1a), although reservoir rocks at these fields comprise Westphalian A to D deposits (Moscariello, 2003;Jones and Glover, 2005;Kombrink et al, 2010). However, little information is available on the diagenetic mineral assemblage (Sedat et al, 1992), and the link between petrophysical data and other relevant factors has not been published.…”