Geothermal project near Paris successfully completes 2nd subhorizontal well
Drilling rig on site in Cachan, Paris/ France (source: Dalkia)
Alexander Richter
20 Mar 2018
The second subhorizontal well for a geothermal project in the Paris suburb of Cachan has been successfully completed proving the subhorizontal well design architecture by company GPC IP.
With a second subhorizontal well successfully completed and tested at Cachan in the Paris Basin in France, the developer and its partners have proven the concept of Subhorizontal Geothermal Well Architecture.
This second subhorizontal geothermal well for the project has been completed for its customer DALKIA (EDF Group).
The well, which will serve as the injection unit of the local Geothermal District Heating doublet, is similar in design to the production well achieved in late December 2017, recorded as a world premiere in geothermal well engineering.
It features an openhole drain, 8″1/2 in diameter and 1 005 m long (against 1 001 m for the first well).
Targeted at a nominal 450 m3/h productive/injective performance, the new doublet managed by a DALKIA/City of Cachan JV (DALKIA operator), will replace two existing, 34 years old, doublets, both cumulating 350 m3/h capacity.
The concept, pioneered by GPC IP, opens attractive perspectives for geothermal development in densely populated areas undergoing moderate to poor (by geothermal standards) reservoir performance.
The project has been led by French consultancy GPC IP for Dalkia and the City of Cachan near Paris, France.
Source: Company release by email
