2024/01/10 by Yuntian Teng, Zihao Li, Teng, Yuntian +3
Engineering · Environmental Science · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Geophysics (physics.geo-ph) #Groundwater flow and contamination studies #Hydraulic Fracturing and Reservoir Analysis #Hydrocarbon exploration and reservoir analysis
paper · pdf · doi:10.48550/arxiv.2401.04930
openalex publication_date 2024/01/10 · openalex created_date 2024/01/13 · openalex updated_date 2026/08/01
This paper reviews theories, experimental data, and modeling methods for pre-Darcy flow in low-permeability porous media, where Darcy velocity shows nonlinear dependence on pressure gradients at sufficiently low pressures, a deviation from Darcy's law. It begins by explaining the fundamental mechanisms of pre-Darcy flow, focusing on its unique characteristics like non-linear pressure gradients and fluid-rock interactions. Next, the paper compiles experimental studies on low-permeability geomaterials such as tight sandstones, shales, and clays, detailing methodologies employed, including core sample preparation, permeability measurement techniques, and threshold pressure gradient assessments. The experiments' findings, showing how pore geometry, fluid type, and pressure conditions affect pre-Darcy flow onset, are discussed. The review then covers empirical and theoretical models, plus simulation methods developed for interpreting data on pre-Darcy flow. It concludes by highlighting challenges in conducting and interpreting these experiments, suggesting directions for future research. This comprehensive analysis aims to assist those studying fluid dynamics in low-permeability geomaterials and has implications for applications like shale oil and gas recovery, contaminant transport in low-permeability aquifers, and geological nuclear waste disposal.