@article{8636472,
  abstract     = {{Hypothesis: The wetting behaviour is a key property of a porous medium that controls hydraulic conductivity in multiphase flow. While many porous materials, such as hydrocarbon reservoir rocks, are initially wetted by the aqueous phase, surface active components within the non-wetting phase can alter the wetting state of the solid. Close to the saturation endpoints wetting phase fluid films of nanometre thickness impact the wetting alteration process. The properties of these films depend on the chemical characteristics of the system. Here we demonstrate that surface texture can be equally important and introduce a novel workflow to characterize the wetting state of a porous medium.

Experiments: We investigated the formation of fluid films along a rock surface imaged with atomic force microscopy using zeta-potential measurements and a computational model for drainage. The results were compared to spontaneous imbibition test to link sub-pore-scale and core-scale wetting characteristics of the rock.

Findings: The results show a dependency between surface coverage by oil, which controls the wetting alteration, and the macroscopic wetting response. The surface-area coverage is dependent on the capillary pressure applied during primary drainage. Close to the saturation endpoint, where the change in saturation was minor, the oil-solid contact changed more than 80%. (C) 2019 The Authors. Published by Elsevier Inc.}},
  author       = {{Rücker, M and Bartels, W-B and Garfi, G and Shams, M and Bultreys, Tom and Boone, MA and Pieterse, S and Maitland, GC and Krevor, S and Cnudde, Veerle and Mahani, H and Berg, S and Georgiadis, A and Luckham, PF}},
  issn         = {{0021-9797}},
  journal      = {{JOURNAL OF COLLOID AND INTERFACE SCIENCE}},
  keywords     = {{Colloid and Surface Chemistry,Electronic,Optical and Magnetic Materials,Surfaces,Coatings and Films,Biomaterials,Surface roughness,Wetting,Atomic force microscopy (AFM),Core initialization,Capillary pressure,Disjoining pressure,WETTABILITY LITERATURE SURVEY,PORE-SCALE,CONTACT-ANGLE,SPONTANEOUS IMBIBITION,POROUS-MEDIA,2-PHASE FLOW,MIXED-WETTABILITY,MULTIPHASE FLOW,OIL-RECOVERY,LOW-SALINITY}},
  language     = {{eng}},
  pages        = {{159--169}},
  title        = {{Relationship between wetting and capillary pressure in a crude oil/brine/rock system : from nano-scale to core-scale}},
  url          = {{http://doi.org/10.1016/j.jcis.2019.11.086}},
  volume       = {{562}},
  year         = {{2020}},
}

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