Ryan Armstrong fra University of New South Wales, School of Petroleum Engineering, besøker Trondheim denne uken i forbindelse med SCA-konferansen. Han skal besøke IGP, NTNU på mandag, hvor han skal gi en presentasjon av hans siste forskning.
Title: «Porous media characterization using Minkowski functionals: theories, applications and future directions«.
Sted: Sydområdet PTS Paviljong 1. etasje Møterom 162
An elementary question in porous media research is in regards to the relationship between structure and function. In most fields, the porosity and permeability of porous media are properties of key interest. There is, however, no universal relationship between porosity and permeability since not only does the fraction of void space matter for permeability but also the connectivity of the void fraction. With the evolution of modern day X-ray microcomputed tomography (micro-CT) and advanced computing it is now possible to visualize porous media at an unprecedented level of detail. Approaches in analysing micro-CT data of porous structures vary in the literature from phenomenological characterization to network analysis to geometrical and/or topological measurements. This leads to a question about how to consistently characterize porous media in a way that facilitates theoretical developments. In this effort, the Minkowski functionals (MF) emerge from the field of statistical physics where it is evident that many physical processes depend on the geometry and topology of bodies or multiple bodies in 3D space. I will present an overview of the theoretical basis of the MF, mathematical theorems and methods necessary for porous media characterization and recent findings relating the MF to macro-scale porous media properties. The examples will cover the geometrical state of fluids during multiphase flow and the macro-scale definition of wettability based on pore-scale curvatures and topology. With the wealth of information generated from 3D imaging of porous media it is necessary to develop an understating of the limitations, opportunities and theoretical frameworks necessary to develop new macro-scale theories and characterisation of multiphase flow in porous media based on rigorous pore-scale data.