Research group for shales:
PhD Research Project
An effective stress framework for partially saturated gas shales: Kim Jinwoo
Gas shales are partially water saturated with their pore space simultaneously filled with brine and liquid and/or gas hydrocarbons. Changes in water saturation can cause swelling or shrinkage, which is of significant importance to natural gas production from unconventional shale reservoirs. During hydraulic fracturing, a substantial amount of injected water-based fluid is believed to imbibe into the shale matrix, driven by the high suction gradient between the well and the shale. However, currently available geomechanical models developed for reservoir problems are usually not multi-phase, and little is known about how suction and water saturation can be related to the resulting volumetric deformation in gas shales. This thesis will explore a possible effective stress framework for describing the swelling and shrinkage of gas shales as stress-strain behavior, including the non-linear hysteretic relationship between suction and water saturation. The outcome of this study is anticipated to provide insight into our understanding of the complex shale behavior and more efficient natural gas exploitation in the field.
E. Crisci, A. Ferrari, S. Giger, L. Laloui. Engineering Geology, 251, 214-227, 2019.
V. Favero, A. Ferrari and L. Laloui. Fourth EAGE Shale Workshop, Porto, Portugal, April 7-9, 2014.
V. Favero, F. Alessio and L. Lyesse. Géotechnique Symposium in Print 2013, London, UK.
A. Ferrari, V. Favero, D. Manca and L. Laloui. 47th US Rock Mechanics/Geomechanics Symposium, San Francisco (USA), 26-29 June 2013.
- Multiphysical Testing of Soils and Shales, L. Laloui, A. Ferrari. Springer, 2012.
- Testing the Thermo-Hydro-Mechanical Behaviour of a Shale.
L. Laloui, A. Ferrari and S. Salager. 3rd EAGE Shale Workshop, Barcelona, 2012.
- New experimental tools for the characterization of highly overconsolidated clayey materials in unsaturated conditions, in Mechanics of unsaturated geomaterials,
S. Salager, A. Ferrari and L. Laloui. p. 113-126, 2010.
- An advanced calibration process for a thermo-hydro-mechanical triaxial system.
A. Seiphoori, A. Ferrari and L. Laloui. International Symposium on Deformation Characteristics of Geomaterials, Séoul, 2011.
- An experimental and constitutive investigation on the chemo-mechanical behaviour of a clay.
P. J. Witteveen, A. Ferrari and L. Laloui. Geotechnique -London-, vol. 63, num. 3, p. 244–255, 2013.
- Advances in the Testing of the Hydro-mechanical Behaviour of Shales.
A. Ferrari and L. Laloui. Springer Series in Geomechanics and Geoengineering, 2012.