The role played by carbonate cementation in controlling reservoir quality of the Triassic Skagerrak Formation, Norway

Abstract

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Reservoir quality of fluvial sandstone reservoirs in salt-walled mini-basins: an example from the Seagull field, Central Graben, North Sea, UK

“…Grain-size variability and sorting is limited across all facies, with most of the sandstones being fine to very finegrained sand (Fig. 7b) (Nguyen et al 2013;Cui et al 2017). Confined fluvial channel sands (CF) and unconfined fluvial sands (UCF) range from very fine to mediumgrained sand (Fig.…”

Geochemical effects of cement mineral variations on water–rock–CO2 interactions in a sandstone reservoir as an experiment and modeling study

“…chloride and montmorillonite‐Ca) . On the other hand, chlorite usually coexists with calcite in rocks, which has been observed in many field areas such as the Ordos Basin, China, and the Skagerrak formation, Norway . What is important is that chlorite dissolution can release metal cations into water, such as Fe 2+ and Mg 2+ , suggesting a huge potential for carbon trapping by mineral phases …”

“…19 On the other hand, chlorite usually coexists with calcite in rocks, which has been observed in many field areas such as the Ordos Basin, China, 26 and the Skagerrak formation, Norway. 27 What is important is that chlorite dissolution can release metal cations into water, such as Fe 2+ and Mg 2+ , suggesting a huge potential for carbon trapping by mineral phases. 28 With the above recognitions, quartzose sandstone containing 5w% cement minerals and 95w% framework minerals was assembled, for maximum representation of the common cases in the CCS project.…”

Overpressure and its positive effect in deep sandstone reservoir quality of Bozhong Depression, offshore Bohai Bay Basin, China

“…Bjørlykke (1992Bjørlykke ( , 1998Bjørlykke ( , and 2015 investigated clay mineral reactions in shales and sandstones and discussed their importance in mechanical and chemical compactions. The characteristics of clay coatings and their contribution to porosity preservation in deeply buried reservoirs have also been studied worldwide (Pittman, 1992;Ehrenberg, 1993;Hammer et al, 2010;Morad et al, 2010;Taylor et al, 2010;Maast et al, 2011;Dowey et al, 2012;Stricker et al, 2016aStricker et al, , 2018Cui et al, 2017;Tang et al, 2018). Overpressure can make great impact on reservoir quality as well.…”