Controls on CO2 fate and behavior in the Gullfaks oil field (Norway): How hydrogeochemical modeling can help decipher organic-inorganic interactions

Creation of pre-oil-charging porosity by migration of source-rock-derived corrosive fluids through carbonate reservoirs: one-dimensional reactive mass transport modelling

“…in the Gullfaks oil field: Smith & Ehrenberg 1989;Ehrenberg & Jakobsen 2001). Hydrogeochemical modelling by van Berk et al (2009van Berk et al ( , 2013 quantitatively reproduced this proven alteration of mineral assemblages in the Gullfaks field, which was driven by the products of oil degradation (CO 2 , CH 3 COOH and CH 4 ).…”

“…Such organic-inorganic interactions represent the inevitable consequences of chemical thermodynamics of such systems under elevated temperature and pressure conditions; the involved hydrogeochemical reactions tend to reach (metastable) equilibrium conditions (Helgeson et al 1993). The fit of the observations (Ehrenberg & Jakobsen 2001) and corresponding modelling results (van Berk et al 2013), regarding such organic-inorganic interactions in reservoir rocks, indicate that our generic batch modelling of ACF generation provides rough, but plausible, estimates to characterize the composition of ACF expelled from siliciclastic source rocks.…”

“…Consequently, even higher concentrations could be expected in ACF-bearing brines that are generated by kerogen maturation and subsequent oil degradation already in the source rock. In summary, organic-inorganic interactions are driven by the products of kerogen maturation and subsequent oil degradation already in siliciclastic source and reservoir rocks (Smith & Ehrenberg 1989;Ehrenberg & Jakobsen 2001;van Berk et al 2009van Berk et al , 2013. Such organic-inorganic interactions represent the inevitable consequences of chemical thermodynamics of such systems under elevated temperature and pressure conditions; the involved hydrogeochemical reactions tend to reach (metastable) equilibrium conditions (Helgeson et al 1993).…”

From shale oil to biogenic shale gas: retracing organic-inorganic interactions in the Alum Shale (Furongian-Lower Ordovician) in southern Sweden

“…This process of carbon dioxide removal takes place at OWCs when dissolved carbon dioxide is bound into solid carbonate phases. The carbonate phases formed can be calcite or dolomite (Dimitrakopolous and Muehlenbachs, 1987) but also nahcolite (and dawsonite;van Berk et al, 2013).…”

Coupled mineral alteration and oil degradation in thermal oil-water-feldspar systems and implications for organic-inorganic interactions in hydrocarbon reservoirs

“…Over the last four decades, advances in the study of oil degradation (Aitken et al, 2004;Head et al, 2003;Hill et al, 2003;Jones et al, 2008;Tian et al, 2006;Waples, 2000) and water-rock interactions (Glasmann et al, 1989;Yuan et al, 2018;Yuan et al, 2017;Zhu et al, 2010) based on laboratory experiments and natural reservoirs have improved our understanding of the respective reaction pathways of oil degradation and rock diagenesis in petroleum systems (Helgeson et al, 1993;Price, 1993;Seewald, 2003;van Berk et al, 2013;Zhang et al, 2012). Nevertheless, the scientific debate over whether chemical diagenesis occurs in oil-filled sandstones is still alive (Molenaar et al, 2008;Marchand et al, 2001;Worden et al, 2017).…”