A conceptual model for glaciogenic reservoirs: From landsystems to reservoir architecture

Abstract

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A regional CO2 containment assessment of the northern Utsira Formation seal and overburden, northern North Sea

“…This and the shallow gas indicators at the clinoform truncations suggest that despite the glacial origin, sandstones are present within these features that could facilitate CO 2 migration up‐dip (Figure 13). Given the features’ glacial origin, their general sandstone abundance is likely to be low (Kurjanski et al., 2020) and the sandstone quality is likely to be poorer in terms of porosity and permeability than the channel and lobe features from the ESP. As such, it could be suggested that their sealing ability is greater than proposed here.…”

Cool deltas: Sedimentological, geomorphological and geophysical characterization of ice‐contact deltas and implications for their reservoir properties (Salpausselkä, Finland)

“…Based on the morphologies of the flat‐topped hills and associated secondary landforms, the hills were interpreted as ice‐contact Gilbert‐type deltas deposited in a lake with water depths of 35 to 60 m above the present‐day land surface (Gilbert, 1885, 1890; Glückert, 1986; Lønne, 1995; Palmu, 1999; Saarnisto & Saarinen, 2001; Thomas & Chiverrell, 2006; Dietrich et al ., 2017b; Kurjanski et al ., 2020). Meltwater and sediments were supplied to the ice margin chiefly via subglacial/englacial meltwater channels and deposited under water, proximal to the grounding line as ice‐contact, subaqueous fans (Powell, 1990).…”

“…16). This can be magnified when the deltas are buried or when reservoir pressures are relatively low, such as in the glaciogenic Pleistocene sediments of the North Sea (Le Heron et al ., 2006; Hirst, 2012; Martin et al ., 2012; Ottesen et al ., 2012; Rose et al ., 2016; Kurjanski et al ., 2020).…”

“…Outcrops and borehole profiles indicate that clay content is low. This is typical for well‐sorted glaciofluvial and deltaic sediments (Glückert, 1986; Palmu, 1999; Zielinski & Loon, 2003; Winsemann et al ., 2018; Kurjanski et al ., 2020). Based on the geomorphology of the deltas, together with the available outcrops and GPR data, Z1 is interpreted as well‐sorted, unsaturated (dry) sands and gravels (Fig.…”

“…Glaciogenic sediments also act as hydrocarbon reservoirs in areas such as the North Sea (Huuse et al ., 2012) and across North Africa (e.g. Osterloff et al ., 2004a; Slomka & Eyles, 2013; Kurjanski et al ., 2020). The ability to predict physical properties of such sediments largely depends on understanding the depositional processes responsible for their formation (Lønne, 1995; Zieliński & van Loon, 2000; Heinz et al ., 2003; Catuneanu, 2006; Hirst, 2012; Slomka & Eyles, 2013; Zecchin et al ., 2015; Dietrich et al ., 2017a; Winsemann et al ., 2018; Lang et al ., 2021).…”