The European Geosciences Union General Assembly (EGU) 2017 was held from 23 to 28 April 2017 in Vienna, Austria. This year, the largest European congress about Geosciences was attended by 14496 scientists from 107 different countries, during 4849 oral presentations, 11312 posters and 1238 PICO (Presenting Interactive COntent). The GEOTREF project was represented by communications in the form of posters and oral presentations.

Two members of the GEOTREF project participated in the organization of sessions:

• Jérôme Fortin (ENS): Session EMRP1.1/ERE1.10/GI3.15. Evaluation of coupled reservoir processes: laboratory experiments and numerical modeling.

Jérôme Fortin (ENS): Session ERE1.4/EMRP4.40/TS2.6. Fracture, mechanics and flow in tight reservoirs.

• Yves Géraud (GeoRessources): Session ERE3.4. Conventional and unconventional geothermal resources: Advances in integrated approaches for exploration and monitoring.

Four posters highlight the scientific advances and a poster of general presentation of the GEOTREF project was also realized by all the partners:

• EGU2017-7880, Session ERE1.4/EMRP4.40/TS2.6. Mechanical behavior of limestone undergoing brittle-ductile transition: experiments and model. Aurélien Nicolas, Guido Blöcher, Zhi Li, Christian Kluge, Liang Pei, Hannes Hofmann, Harald Milsch, and Yves Guéguen.
• EGU2017-7799, Session EMRP1.1/ERE1.10/GI3.15. Micro-seismicity and permeability enhancement in sandstone and andesite ruptured by fluid injection under triaxial conditions. Aurélien Nicolas, Guido Blöcher, Zhi Li, Christian Kluge, Liang Pei, Hannes Hofmann, Harald Milsch, and Yves Guéguen.
• EGU2017-8587, Session EMRP1.1/ERE1.10/GI3.15. Fluid-induced rupture on heat-treated andesite. Zhi Li, Aurelien Nicolas, Jerome Fortin, and Yves Gueguen.
• EGU2017-18849, Session ERE3.4. Geothermal activity related to transtensional context evidenced by petrological and structural data in the St Kitts Island (Lesser Antilles). Marc Diraison, Michel Corsini, Sébastien Haffen, Yves Géraud, and Vivien Navelot.
• EGU2017-17230, Session ERE3.4. The GEOTREF program, a new approach for geothermal investigation. Frédéric Gérard, Simon Viard, Michel Garcia and the GEOTREF.

Scientific advances made, in particular thanks to collaborative work, were highlighted during three oral presentations made by PhD students:

• EGU2017-19379, Session ERE3.4. Magnetic mapping for structural geology and geothermal exploration in Guadeloupe, Lesser Antilles. Jeanne Mercier de Lépinay, Marc Munschy, Yves Geraud, Marc Diraison, Vivien Navelot, Christelle Verati, Michel Corsini, Jean Marc Lardeaux, and Alexiane Favier.
• EGU2017-18920, Session ERE3.4. Characterization of geothermal paleosystem in the Lesser Antilles volcanic arc: structural, petrographic, thermodynamic and petrophysics analysis of Terre-de-Haut (Les Saintes archipelago, Lesser Antilles). Alexiane Favier, Vivien Navelot, Chrystèle Verati, Jean-Marc Lardeaux, Michel Corsini, Marc Diraison, Yves Géraud, Jeanne Mercier de Lépinay, and Marc Munschy.
• EGU2017-18832, Session ERE3.4. Multidisciplinary exploratory study of a geothermal resource in the active volcanic arc of Basse-Terre (Guadeloupe, Lesser Antilles). Vivien Navelot, Alexiane Favier, Yves Géraud, Marc Diraison, Michel Corsini, Chrystèle Verati, Jean-Marc Lardeaux, Jeanne Mercier de Lépinay, and Marc Munschy.