E Papamichos, Aristotle University of Thessaloniki, Greece and Sintef Industry, Norway
M Kattis, NTNU Norwegian Univ of Science and Tech, Norway
Abstract:
We will present pore collapse experiments in a high porosity chalk at different strain paths with axial fluid flow to determine changes in permeability. We use the results to develop/calibrate a hydromechanical model that couples pore collapse and permeability changes in porous rocks. Pore collapse (or grain crushing) is known to give a decline in permeability in addition to the one expected due to the reduction of porosity due to the rock destructuration. This effect can be modeled by a modification of the Kozeny-Carman permeability law to include pore collapse through a stress term related to the pore collapse yield surface.
Short bio:
Euripides Papamichos is Professor of Mechanics at the Civil Engineering Department of the Aristotle Univ of Thessaloniki, Greece and a Chief Scientist at SINTEF Industry, Trondheim, Norway. He holds a BSMS in Mining and Metallurgical Engineering from the National Technical Univ of Athens, Greece, and MSc and PhD in Civil Engineering from the University of Minnesota. Previously he worked as a Research Scientist for Elf Aquitaine in Pau, France and a Research Associate at the University of Colorado at Boulder. He has performed original research in a variety of bifurcation and localization problems and petroleum-related geomechanical problems such as sand production in single and multiphase flow, reservoir compaction and subsidence, reservoir geomechanics, and core damage. He is the author of over 150 scientific publications and four books with more than 2400 citations
