in deep, super-critical ambients of continental Europe
technological breakthrough of geothermal energy production
the place where the world’s first geothermal power plant has been
installed more than 100 years ago, is currently the scene of a most
challenging scientific experiment. The DESCRAMBLE project, co-funded
by the European Union within the "HORIZON 2020" initiative,
is targeted to drill deep into the earth crust and to encounter
super-critical geothermal reservoir conditions. At expected
temperature and pressure conditions of more than 374 °C and 22 MPa,
respectively, water will become supercritical.
That means that water is neither a liquid nor steam. In this
form it can transport from depth up to ten times more energy than
normal water or steam can produce in a conventional geothermal well.
target of the DESCRAMBLE project, which is coordinated by Enel Green
Power, is to demonstrate
that it is feasible to drill into supercritical reservoir zones and to
handle safely the harsh temperature and pressure conditions. Therefore,
novel drilling and measurement techniques will be developed and tested.
To achieve this technological breakthrough, an existing well in
Larderello (Tuscany, Italy), will be deepened from its present depth
of 2.2 km down to 3 km – 3.5 km. It is planned to reach the
so-called K-horizon, a prominent seismic reflection, interpreted as
associated to super-critical deep geothermal reservoirs.
task within the project will focus on the interpretation of borehole
geophysical data, which provide in-situ information on the physical
and chemical conditions of the well environment. Objective of our log
interpretation work is to characterize the reservoir in its thermal
and hydraulic properties. This study will integrate open-hole
geophysical logs, which are acquired prior and during deepening of the
well, with the results of laboratory investigations on rock samples
from the well and its surrounding.
on the current status of the project can be found at the DESCRAMBLE