27th ISRM online lecture by Prof. Derek Elsworth at 10 a.m. GMT, 25 September 2019

Dear ISRM Members and Rock Mechanics Colleagues,

For the 27th ISRM Online Lecture the ISRM invited Prof. Derek Elsworth, from the Pennsylvania State University. The title of the lecture is “ Seismicity-Permeability Coupling in the Breaching and Sealing of Reservoirs and Caprocks ”. 

Contemporary methods of energy conversions that reduce carbon intensity include sequestering CO2, fuel switching to lower-carbon sources, such as from gas shales, and recovering deep geothermal energy via EGS. In all of these endeavors, either maintaining the low permeability and integrity of caprocks or in controlling the growth of permeability in initially very-low-permeability shales and geothermal reservoirs represent key desires. At short-timescales of relevance, permeability is driven principally by deformations – in turn resulting from changes in total stresses, fluid pressure or thermal and chemical effects. These deformations may be intrinsically stable or unstable, result in aseismic or seismic deformation, with resulting changes in permeability conditioned by the deformational mode. We report experiments and models to represent the respective roles of mineralogy, texture, scale and overpressures on the evolution of friction, stability and permeability in fractured rocks, and their consequences on fluid production, containment and induced seismicity.

The lecture will be broadcast on Wednesday, 25 September, at 10 AM GMT and will remain available in the  online lectures dedicated webpage .

Derek Elsworth is a Professor in the Departments of Energy and Mineral Engineering and of Geosciences and the Center for Geomechanics, Geofluids, and Geohazards. His interests are in the areas of computational mechanics, rock mechanics, and in the mechanical and transport characteristics of fractured rocks, with application to geothermal energy, the deep geological sequestration of radioactive wastes and of CO2, unconventional hydrocarbons including coal-gas, tight-gas-shales and hydrates, and instability and eruption dynamics of volcanoes. More info on Prof. Derek Elseworth can be found at http://www.ems.psu.edu/~elsworth/ .

Previous ISRM Online Lectures  were given by Wulf Schubert, John Hudson, Pierre Duffaut, Eduardo Alonso, John Read, Herbert Einstein, Shunsuke Sakurai, Resat Ulusay, Dick Stacey, Jean Sulem, Nick Barton, Ove Stephansson, Peter Kaiser, Walter Wittke, Nielen van der Merwe, Giovanni Barla, Charles Fairhurst, Marc Panet, Xia-Ting Feng, Milton Kanji, Laura Pyrak-Nolte,  Håkan Stille, Maurice Dusseault, Claudio Ollala, Derek Martin and José Lemos .
The lecture will remain online so that those unable to attend at this time will be able to do it later. As usual, the attendees will be able to ask questions to the lecturer by e-mail during the subsequent five days. All online lectures are available from  this page .

ISRM Secretariat, c/o LNEC, Av. Brasil, 101, 1700-066 Lisboa, PORTUGAL
Tel: (+351) 218443419; Fax: (+351) 218443021; Website:  www.isrm.net ; E-mail:  secretariat@isrm.net

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