Well coring program and logging
When drilling a well, drill cuttings (or cores) are analyzed to study the lithology penetrated by the well. The lithology found is compared to geological models of the area that are corrected if necessary, this work aids the location of the aquifers.  Physical properties, like porosity and alteration (if any) of the rock are studied.  At critical depths, like casing depths and at the end of drilling, various parameters of the well are measured.  The measured parameters are temperature and various geophysical logs. Data on productivity/injectivity of the well are measured in a well completion test conducted after the drilling.

Project example:
Core drilling in the high-temperature geothermal fields of Theistareykir and Gjástykki, Iceland, and supervision of local contractors in the drilling of a low-temperature geothermal well in Szentlörinc, Hungary.