A significant milestone has been reached at the Reykjanes Peninsula in SW Iceland on the 25th of January 2017 when the IDDP-2 well was successfully drilled and completed to a depth of 4659 m (cemented to 3000 m), making it the deepest well in Iceland. The drilling operations took approximately 168 days with major drilling challenges of total drilling fluid losses, stuck pipe accidents and poor, at times, core recovery. The main targets of the project included drilling and completing a reconstructed RN-15 well to the supercritical depths, extract core samples, measure the temperature and search for potential permeability. Temperature at the bottom of the IDDP-2 well amounted to an extreme value of 427°C, with fluid pressure of approximately 340 bars (measured using wire-line tools, soon after drilling operation ceased), making it a first well, exceeding not only critical temperatures, which was already observed in countries such as Italy, Mexico or Japan, but also critical pressures, in the history of geothermal drilling.

 

Once the most positive outcome of the project is achieved, the well can be directly used for highly efficient energy production. It would open new dimensions for the future geothermal energy utilization and electricity production. It is due to supercritical fluids having much higher energy content, in comparison with the conventional high-temperature geothermal systems with temperatures below the critical temperature of water. Once such ‘supercritical’ wells would be able to produce more power than conventional high-temperature geothermal wells, fewer wells would be needed to produce the same power output, leading to smaller environmental impact, improved economics, and wider social acceptance. Another investigated solution will be to use the IDDP-2 well for deep water injections to enhance the performance of the overlying production zones within the Reykjanes geothermal field.

For more #GeothermalFactsandStats on the IPPD-2 project and others, follow us on all the major social media platforms and check out our blog weekly!

Core samples extracted from the IDDP-2 well

Author: Michal Kruszewski

Sources:  https://www.sci-dril.net/23/1/2017/sd-23-1-2017.pdf and Equinor

https://www.icdp-online.org/fileadmin/icdp/projects/doc/iddp/IDDP2-Driller-Reports/IDDP-2-Completion-websites-IDDP-DEEPEGS.pdf

#Geothermal #Reykjanes #Iceland #deepdrillingproject #criticaltemperatures

January 24, 2019
Thor Drilling Rig

The IDDP-2 Well, A Significant Milestone in the Global Geothermal Industry

A significant milestone has been reached at the Reykjanes Peninsula in SW Iceland on the 25th of January 2017 when the IDDP-2 well was successfully drilled […]
January 22, 2019
Rock fractures

Fractures and Geothermal Systems

Not everything fractured is broken. A fractured geothermal system agrees. Fractures are one of the most important features of geothermal exploration. They are the main conduits […]
January 16, 2019

Vacuum Insulated Tubing for Deep Borehole Heat Exchangers

One of the ways to extract geothermal heat from the Earth’s crust is Deep Borehole Heat Exchangers (DBHE). These can be either drilled especially for heat […]
January 9, 2019
An industry

Geothermal heating and cooling from Dannenbaum’s mine waters

The public utility company of Bochum in cooperation with the International Geothermal Centre is planning to utilize mine waters from the former Dannenbaum colliery (in operation […]