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- W2006415131 abstract "Abstract Kerogen wettability is essential to evaluate hydrocarbon storage and quantify reserves estimates, to develop models for multiphase and multicomponent transport especially in oil shales and to predict recoveries of fracture water as well as predict the placement of fracture water during re-fracture treatments. The widely held view for kerogen pores is generally hydrocarbon-wetting; however, some recent experimental work indicates the existence of water content in kerogen. The kerogen maturation process is associated with the loss of H/C and O/C ratios which may influence the wettability depending on the affinity of these functionalized molecules with water. In this paper, we provide a microscopic study of the role of kerogen maturity on wettability of organic pore systems. Varying maturation degree of kerogen surfaces are built by grafting functionalized groups onto the traditional graphene model. We study a mixture of water and alkanes in organic pores with effective width of 5 nm. We find that water aggregates to form clusters, and the shape and the location of the water molecules are strongly linked to the density of the functionalized groups. By determining the contact angles, we are able to quantify the relationship of kerogen wettability with the maturity level. We demonstrate that the wettability in kerogen is very likely to be heterogeneous. Depending on the maturity level, kerogen may be hydrocarbon wetting at high maturity, neutral wetting at intermediate maturities or even hydrophilic for organic surfaces of very low maturities. In addition, we also demonstrate the influence of surface heterogeneity and the distribution of polar molecules on kerogen wettability. Our results indicate that in kerogen there may be a critical local density of surface functionalized sites that may create optimal conditions for hydrophilic kerogen surfaces." @default.
- W2006415131 created "2016-06-24" @default.
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- W2006415131 date "2014-10-27" @default.
- W2006415131 modified "2023-09-26" @default.
- W2006415131 title "Impact of Maturity on Kerogen Pore Wettability: A Modeling Study" @default.
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- W2006415131 doi "https://doi.org/10.2118/170915-ms" @default.
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