Stenshøj et al. (2023): Hydrocarbon residue in a Danish chalk reservoir and its effects on CO2 injectivity

Rasmus Stenshøj, Arash Abarghani, Nidhal Badrouchi, Yang Yu, Steven A. Smith, Arka Rudra, Henrik I. Petersen, Hamed Sanei IN: Marine and Petroleum Geology 156, 106424, https://doi.org/10.1016/j.marpetgeo.2023.106424

Depleted oil and gas chalk reservoirs in the Danish North Sea are considered for Carbon Capture and Storage (CCS) as part of Denmark’s strategy to reduce CO₂ emissions. While these reservoirs are well understood after decades of hydrocarbon production, the interaction between CO₂ and hydrocarbon residues (HCRs) is less understood and pose a major challenge. This study investigates the effects of supercritical CO₂ (sc-CO₂) injection on HCRs in a core plug from the Upper Cretaceous chalk reservoir of the Halfdan Field, Danish North Sea, after sc-CO₂ flooding for nine days in near reservoir conditions (85 °C and 27.6 MPa).

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