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Stimulation in Geldinganes

Stimulation in Geldinganes

WP5's stimulation treatment  in order to demonstrate cyclic soft stimulation is now ready to start in the well RV-43 in Geldinganes near Reykjavik, Iceland. Operational work starts with reaming / cleaning the well and a subsequent borehole logging. The stimulation begins with temperature and caliper logs followed by a borehole televiewer for inspection of potential intervals to set the packers since the proposed stimulation treatment includes zonal isolation of reservoirs sections followed by a multi-stage stimulation.

The seismic monitoring system was completely installed in August 2019 in cooperation with Reykjavik Energy (OR), GFZ and ETH and has since been in operation. The monitoring system includes several surface stations and the installation of GFZ’s geophone chain in a neighbouring well. The network is operated by ISOR. The traffic light system (TLS) was set up together with OR; in parallel, an advanced version (ATLS) was installed by ETH Zürich and will be adjusted with new incoming data from the stimulation stages.

In total, it is planned to stimulate 3 stages from the bottom of the well (ca. 1700 m), a mid interval (1300 m) and the upper interval (1100 m) with a straddle packer system. Each stimulation treatment is scheduled for approx. 4 days and includes flow back after each treatment.

In the end, an airlift test is scheduled to quantify the success of the whole stimulation campaign. 

New article on harmonic pulse test published

New article on harmonic pulse testing published

A new article titeled "Harmonic Pulse Testing for Well Monitoring: Application to a Fractured Geothermal Reservoir" was published in Water Resources Research by DESTRESS WP 5. It discusses Harmonic Pulse Testing (HPT) that aims to determine well and formation parameters such as wellbore storage, skin, permeability, and boundaries within the investigated volume.  The advantage is that it does not require the interruption of well and reservoir injection/production before and/or during the test because it allows the extraction of an interpretable periodic signal from measured pressure potentially affected by interference. This makes it an ideal monitoring tool. Find out more about HPT in the article.

Pohang commission publishes lessons learned

Pohang commission publishes lessons learned

The international commission, which analyzed the magnitude 5.5 Pohang earthquake, comes to an unequivocal conclusion: the nearby geothermal project has caused the damaging event through stimulations at borehole PX2. After having delivered a detailed report at hand of the South Korean government, the commission published a comprehensive summary in Science including lessons learned.

Access the Science paper “Managing injection-induced seismic risks”

Access the commission report

Inauguration of Bedretto Lab

Inauguration of Bedretto Lab

The new rock laboratory "Bedretto Underground Laboratory for Geoenergies" (Bedretto Lab) was inaugurated on 18 May 2018 in Bedretto, Switzerland. More than 200 vistors seized the opportunity to visit the lab and learn more about geothermal research.
The DESTRESS project in Bedretto aims to demonstrate that the construction of a heat exchanger that is sustainable over several decades can be planned and controlled with the aid of hydraulic stimulation processes. The experiments will be carried out on scales of several hundreds of meters. The larger scale implicates longer boreholes, which allow more realistic experiments to be carried out, applying different stimulation concepts.

Similar to other projects, this project will perform in-situ stimulation concepts tests while monitoring hydro-seismo-mechanical key parameters at a high spatial resolution. The addressed questions are:
  1. Which stimulation concepts are appropriate for enhancing the permeability by orders of magnitudes while minimizing induced seismicity?
  2. What are the relationships between the hydro-mechanical response, the stimulation concept, permeability creation, effective porosity, and induced seismicity?
  3. How can micro-seismicity be minimized?
  4. What are the heat exchanger properties of the reservoir?
Find out more about the Bedretto Lab on their website and follow their Instagram account @BedrettoLab.

Welcome to DESTRESS

DESTRESS stands for a promising and future-oriented approach to demonstrate soft stimulation methods of EGS. We focus on solutions for the exploitation of underground heat which are economical, sustainable and environmentally responsible. Co-funded by the EU, we contribute to the European energy strategy, which targets renewable energy, greenhouse gas reduction and energy efficiency. The primarily objective of DESTRESS is to develop a comprehensive compilation of good practices for successful geothermal projects through demonstration and research.

Learn more

Events

20. - 22.01.2020 in Delft, The Netherlands
Final DESTRESS General Assembly

27.04. - 01.05.2020 in Reykjavik, Iceland
World Geothermal Congress WGC

Access Programmes

DESTRESS offers virtual and physical access to its sites. Every demonstration site differs in its environment and the stimulation techniques used.