| Title | Sorption model of lacustrine shale oil: Insights from the contribution of organic matter and clay minerals |
| |
| Author | Li, J; Wang, M; Jiang, C ; Lu, S; Li, Z |
| Source | Energy vol. 260, 125011, 2022 p. 1-15, https://doi.org/10.1016/j.energy.2022.125011 |
| Image |  |
| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20220226 |
| Publisher | Elsevier |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf |
| Subjects | fossil fuels; Science and Technology; oil shales; oil |
| Illustrations | schematic diagrams; tables; location maps; plots; histograms; photomicrographs |
| Program | Energy Geoscience Innovation and renewable energy - pore fluid implications |
| Released | 2022 08 08 |
| Abstract | Shale oil is a promising alternative unconventional energy to conventional fossil fuels. Although some studies have been conducted on total oil content, little work to date was performed on sorbed
versus free oil, which is essential for estimating shale oil reserves. This study proposed a sorbed oil model insights from the contribution of oil absorption in kerogen (Absk), oil adsorption on organic pores (Adsk), and oil adsorption on clay
pores(Adsc). The model innovatively considers the effect of thermal maturation on kerogen sorption and the proportion of clay pores hosting adsorbed oil (f). A case study shows that the Absk ranges from 250 to 80 mg/g TOC in the vitrinite reflectance
range of 0.5%-0.89%, while Adsk is 16.5-115.58 mg/g TOC because organic pores are not well developed. For clay pores, the oil adsorption capacity is 1.8 mg/m2 and f is mainly controlled by the oil saturation. At the early oil window, oil sorption
associated with kerogen dominated, thus free oil instead of total oil contents should be considered when selecting favorable areas. The proposed model is useful to our understanding of the shale oil occurrence mechanism and provides a new way of
estimating sorbed oil contents at different maturity. |
| Summary | (Plain Language Summary, not published)
Shale oil is a promising alternative unconventional energy to conventional fossil fuels. This study proposed a new model for the occurrence of oil in
shale by considering the contribution of oil absorption in kerogen (Absk), oil adsorption on organic pores (Adsk), and oil adsorption on clay pores (Adsc). The effect of thermal maturation on kerogen sorption and the proportion of clay pores hosting
adsorbed oil (f) was also taken into account with the new model, making it useful to our understanding of the shale oil occurrence mechanism and for estimating sorbed oil contents at different maturity. |
| GEOSCAN ID | 330587 |
|
|