In order to gain a deep understanding of the underlying mechanisms in the course of multiphase flow through porous media, one needs to study interactions between fluid and solid at a more fundamental level. For which, laboratory measurements are difficult, costly, and time consuming, while pore-scale models (PSMs) offer the opportunity to capture and study micro-scale phenomena more affordably. Pore network models (PNMs) are indirect PSMs which are practiced considerably due to the lower complexity and the larger size of media that they cover. In this study, a dynamic PNM of imbibition for waterflooding is developed where both viscous and capillary forces are considered as well as two main fluid displacement mechanisms—frontal displacement and wetting layer flow. Displacement profiles are obtained under three different capillary numbers and by assigning four different contact angles. Effect of viscous and capillary forces are considered alongside to investigate the trend of different properties— backflow and snap-off. It was found that increasing contact angle—which results in a reduced capillary pressure value—does not always yield in improved displacement profiles. This is different to local events where some trends of displacement efficiency could be detected with changes in contact angle.
|Number of pages||5|
|Publication status||Published - 5 Jun 2023|
|Event||84th EAGE Annual Conference & Exhibition 2023 - Vienna, Austria|
Duration: 5 Jun 2023 → 8 Jun 2023
|Conference||84th EAGE Annual Conference & Exhibition 2023|
|Period||5/06/23 → 8/06/23|