Tortuosity of pore channels in tight rocks as a key parameter in fluid flow ability

• DOI: 10.1007/s11600-023-01262-7
• Publication Date: 2024-01-04T03:01:58Z
• Authors: Paulina Krakowska...
• Keywords: Tortuosity; Porosimetry; Tight gas; Petrophysics

Abstract Tortuosity is a significant parameter in porous materials analysis. Not only, when it comes to rocks or soils but also cellular materials, alloys cells, the multiple definitions exist for tortuosity and several purposes. Geometrical describes pore network paths; on other hand thermal, diffusional, electrical hydraulic refers transport processes network. Computed X-ray tomography (CT) best solution estimation, thanks 3D images. In particular, computed tomography, together with mercury porosimetry (MICP), pulse- pressure-decay permeability methods (PDP), as well measurements (EPM), links expands information about into greater meaning. The geological material was composed of tight, low-porosity low-permeability gas-saturated cored from present depth deposition below 3000 m, containing different lithologies, sandstones, mudstones, limestones, dolomites. research presents novel approach identification analysis main channels based CT Algorithm central axis identifies analyzes whole flow path calculates tortuosity. High correlation observed between Swanson data. Moreover, high detected saturation exponent measurement analyzed tight deposits. Multilinear regression (MLR) allows estimating absolute taking CT, MICP EPM parameters consideration. Combination these one equation determination coefficient gives credence preliminary (PDP) data which executed standard core (MICP EPM) non-invasive method (CT).