Speaker
Description
Particle migration and pore clogging in porous media represent prevalent phenomena in oil and gas engineering. These processes inevitably constitute a primary constraint on efficient production operations. Consequently, a comprehensive understanding of migration and clogging mechanisms governing complex particle systems during multiphase flow in porous media holds considerable significance. However, limited research has examined the combined effects of particle shape and surface roughness. To address this issue, this study first prepared a multivariate control group of particle samples utilizing 3D printing technology integrated with conventional abrasion method. The morphological complexity of particles was rigorously characterized through scanning electron microscopy (SEM) and surface profilometer. Subsequently, via a representative case study of particle sedimentation in water, experimental measurements were compared with simulation results obtained from coupled CFD-DEM-VOF simulations. Following validation of model accuracy, influence of particle complexity on particle migration and pore clogging dynamics during gas driven water flow in porous media was systematically investigated. Research results demonstrate that the combined effects of particle geometric shape and surface roughness significantly alters particle migration trajectories and clogging behavior. Geometric shape governs the force distribution on particle and the structure of fluid wake. The dynamic evolution of the interphase region further influences the forces exerted on particles, leading to particle migration driven by the dominant capillary force. Surface roughness significantly enhances particle attachment ability by creating an expanded contact area between the particle and surrounding fluid. Capillary forces generate additional retention resistance at pore throats, and when coupled with surface roughness, they enhance the capillary retention effect. Consequently, increased roughness leads to a higher probability of particle migration and subsequent pore clogging within low-flow velocity regions. The sides of dominant flow channels formed by gas-driven water in porous media are prone to becoming high-risk areas for clogging. This study provides valuable theoretical insights into the influence of particle complexity on particle migration and pore clogging during multiphase flow in porous media, thereby offering a basis for optimizing flow parameters and preventing pore clogging in related engineering applications.
| Country | China |
|---|---|
| Acceptance of the Terms & Conditions | Click here to agree |
