Print Email Facebook Twitter A Screening Assessment of the Impact of Sedimentological Heterogeneity on CO2 Migration and Stratigraphic-Baffling Potential: Sherwood and Bunter Sandstones, UK Title A Screening Assessment of the Impact of Sedimentological Heterogeneity on CO2 Migration and Stratigraphic-Baffling Potential: Sherwood and Bunter Sandstones, UK Author Alshakri, Jafar (Imperial College London) Hampson, Gary (Imperial College London; Heriot-Watt University) Jacquemyn, Carl (Imperial College London) Jackson, Matthew (Imperial College London) Petrovskyy, Dmytro (Heriot-Watt University) Geiger, S. (TU Delft Applied Geology; University of Edinburgh) Silva, Julio Daniel Machado (University of Calgary) Judice, Sicilia (University of Calgary) Rahman, Fazilatur (University of Calgary) Sousa, Mario Costa (University of Calgary) Date 2023 Abstract We use a combination of experimental design, sketch-based reservoir modelling, and flow diagnostics to rapidly screen the impact of sedimentological heterogeneities that constitute baffles and barriers on CO2 migration in depleted hydrocarbon reservoirs and saline aquifers of the Sherwood Sandstone Group and Bunter Sandstone Formation, UK. These storage units consist of fluvial sandstones with subordinate aeolian sandstones, floodplain and sabkha heteroliths, and lacustrine mudstones. The predominant control on effective horizontal permeability is the lateral continuity of aeolian-sandstone intervals. Effective vertical permeability is controlled by the lateral extent, thickness and abundance of lacustrine-mudstone layers and aeolian-sandstone layers, and the mean lateral extent and mean vertical spacing of carbonate-cemented basal channel lags in fluvial facies-association layers. The baffling effect on CO2 migration and retention is approximated by the pore volume injected at breakthrough time, which is controlled largely by three heterogeneities, in order of decreasing impact: (1) the lateral continuity of aeolian-sandstone intervals; (2) the lateral extent of lacustrine-mudstone layers, and (3) the thickness and abundance of fluvial-sandstone, aeolian-sandstone, floodplain-and-sabkha-heterolith and lacustrine-mudstone layers. Future effort should be focussed on characterising these three heterogeneities as a precursor for later capillary, dissolution and mineral trapping. To reference this document use: http://resolver.tudelft.nl/uuid:92bf4fd3-6bbb-48eb-8b7d-b8c35efb0cb4 DOI https://doi.org/10.1144/SP528-2022-34 ISSN 0305-8719 Source Geological Society Special Publication, 528 (1), 1-22 Part of collection Institutional Repository Document type journal article Rights © 2023 Jafar Alshakri, Gary Hampson, Carl Jacquemyn, Matthew Jackson, Dmytro Petrovskyy, S. Geiger, Julio Daniel Machado Silva, Sicilia Judice, Fazilatur Rahman, Mario Costa Sousa Files PDF SP528_2022_34_1_.pdf 4.23 MB Close viewer /islandora/object/uuid:92bf4fd3-6bbb-48eb-8b7d-b8c35efb0cb4/datastream/OBJ/view