Manager of the Majorca site : Philippe Pézard

The Majorca site (12,000 m2) is located at Ses Sitjoles, in the southeast of the island. It offers an aquifer in a Miocene reefal limestone setting, highly permeable, with a number of meter-scale karstic cavities. Intensive farming and irrigation in this area have led to over-exploitation of the water tables, which has caused intrusions of salt water up to 15 km from the coast, resulting in chloride pollution of the water tables. The experimental site includes a network of twelve 100-m boreholes, six of which are fully cored. The site is monitored by a team from UMR Géosciences Montpellier for:

  • In situ characterization of the site by borehole-measurement campaigns: geologic structure intersected (imaging of walls); petrophysical characterization (electrical, acoustic, natural radioactivity); and characterization of flows by hydrogeophysical methods (discharge, self-potential, hydrodispersive behavior, etc.).
  • Petrophysical and x-ray tomographic characterization of cores
  • Continuous in situ monitoring of the reservoir using new geophysical observation techniques (igeo-SER) for periodic measurements (hourly or daily) of parameters such as electrical resistivity and electrokinetic potential, also hydrodynamic parameters (Hydreka piezometers) for measuring pressure and temperature fields, and the ionic load of in situ fluids.
  • Regular in situ sampling and analysis of fluids.
  • Analysis of in situ monitoring data to study the reservoir’s response to outside stresses both natural (climatic, tectonic, pumping, etc.) and induced during experimentation (injection of a tracer or a long-duration flow).
  • Simulation and modeling of transport processes within the reservoir.