• News
  

September 2010

HITI FINAL WORKSHOP

The HITI final workshop was held on September 16-17, 2010, in Athens, Greece, in the Divani Caravel Hotel. The number of the participants was approximately 25.

Agenda

Presentations of the workshop

Ragnar Asmundsson_Athens_Final_Workshop
HITI_Athens-2010_Henninges-final-web
100916_HitiFinal_GFZ_Reinsch
FinalMeetingBS
Presentation Athens Workshop 26&27-09-2010
BRGM HITI probe realization
ALT-HITI-Athens
Calidus_HITI-Athens Sept 2010
Electronics
CRES 2010
GNS_HITI_17sept
HITI Final Workshop Athens 2010_IDDP
Athenes Marie Violay

June 2010

Demonstation_BRGN (pdf)

February 2010

List of publications sent to WGC2010:

1) Bernard Sanjuan, Romain Millot, Michel Brach, Ragnar Asmundsson and Niels Giroud. Use of a New Sodium/Lithium (Na/Li) Geothermometric Relationship for High-Temperature Dilute Geothermal Fluids from Iceland.
2) Nigel Halladay, Jean-Luc Deltombe, Jean-Marc Naisse, Colin Johnston, Francois Lebert and Ragnar Asmundsson, Borehole Instruments for Supercritical Geothermal Reservoirs.
3) Violay M., Gibert, B., Mainprice, D., Evans, B., Pezard, P.A., Flovenz, O.G. and Asmundsson, R. The Brittle Ductile Transition In Experimentally Deformed Basalt Under Oceanic Crust Conditions: Evidence For Presence Of Permeable Reservoirs At Supercritical Temperatures And Pressures In The Icelandic Crust.
4) Massiot C., Asmundsson R. and Pezard P.A. Achievements and Ongoing Progress of the European HiTI Project: High Temperature Instruments for Supercritical Geothermal Reservoir Characterization and Exploitation.

December 2009

Demonstation_Televiewer_300deg (pdf)

Movie: http://www.isor.is/~rka/ALT_ABI92_300deg.mpg

August 2009

Figure: The distributed temperature sensing fiber optic cable, installed last May in well HE-53, has now reached 230°C, after two weeks of measurements during a flow test that started on July 29. The measurements show the thermal response of this powerful well, estimated to provide 17 MW of electric power from 34 kg/s of pure steam (the steam+water flow is around 60 kg/s). The distributed temperature sensing method provides the temperature at any location in the 230 m section measured at any given time, presented in the colour coded map below. Both instalment and measurements were performed by GFZ-Potsdam, in collaboration with Reykjavik Energy and Iceland Drilling.

 

May 2009

Successful measurements of temperature

 

Figure: Temperature profiles recorded with depth at different times using the distributed temperature sensing (DTS) method while cementing and cement hardening took place in well HE-53 in Hellisheidi, high temperature geothermal field in Iceland. Temperature is colour coded up to 70°C to a depth of 270m. To the far left, the well is cold after cement has been injected. The well gradually heats up with a temperature anomaly around 100m. The cooling observed in the morning of May 5th is due cold water filling of the well prior to cement bond logging run that requires the well to be water filled for observation of the acoustic reflectance.

.

May 2009

Distributed temperature sensor installed in a high temperature well in Iceland

On May 3rd 2009, a new design of a high temperature fiber optic temperature sensor was permanently installed together with a 300 m casing section in well HE-53 in Hellisheidi, southwest Iceland. The fiber optic cable is capable of measuring temperature at any depth in the well simultaneously, using a dedicated laser at surface, providing the well temperature indication through a laser scattering process (Raman scattering). The technique is called distributed temperature sensing (DTS) and is commonly used in tunnel constructions with increasing application in oil & gas exploration.
The cable was developed by GFZ-Potsdam and nkt cables as part of the HITI project, with the goal of providing accurate temperature readings at temperatures approaching 300 °C. Recordings were performed during the cementing of casings and during the cement hardening process.

Figures. Clockwise from top left: 1) The bottom loop is attached. 2) The cable is fastened on opposite sides of casing. 3) Connections brought down under the rotary table at the end of operation. 4) Cable is connected to laser and laptop computer.

.

March 2009
Demonstration of ALT televiewer and gamma instruments

November 2008

A high temperature televiewer with casing inspection analysis and a gamma ray detector, functional at 300 °C, is being developed by ALT in the HITI project. Functionality was demonstrated in November 18-20 in two wells in the high temperature areas of Krafla and Bjarnarflag, NE-Iceland. The combined 6.26 m long tool is called ABI85-92, but it has a modular design and the televiewer and gamma units can be operated separately. The two wells were chosen for demonstration were 1) open hole well (K-18) near a known supercritical geothermal area in Krafla and 2) a well in Bjarnarflag (B-14) with temperature approaching 300°C in the cased section. Data is currently being analysed, but we can inform that the televiewer was able to give good data in a hard and acoustically reflecting section of the open hole well in K-18 and was able to perform casing thickness analysis in both the open hole well and the B-14 ‘hot well’. We are currently critically looking at the data quality in the lower sections of well K-18 and also the temperature performance above 200°C in B-14. Testing will continue at ALT facilities, with another demonstration planned before measuring depths will be reached in the IDDP well, in the first half of 2009.

.

Figure 1: Images from the trip

.

Figure 2: Example of an ABI85 televiewer image in a 2-meter depth interval, from 719 m to 721 m is shown. The well is vertical (almost zero tilt), with a low gamma ray API count (around 10 to 20 gAPI). Temperature in the well was 100°C at this point. A prominent fracture can be identified in the image.

A video from the trip www.isor.is/

.

• News history
• Kick-off meeting

A contract between HITI partners and EC has been signed. Project started January 1st.

HITI kick-off meeting was held at GFZ in Potsdam (HITI_kick_off_minutes, pdf), coinciding with ENGINE mid-term conference (another European geothermal project).

Main issues discussed were of technical nature, dealing with cooperation between partners. A consortium agreement needs to be written, addressing ownership and nondisclosure. Briefings of the meeting have been distributed internally and form a basis for further work planning.

In addition, we plan the deployment of two high temperature instrumentations this year (2007), in agreement with well owners within the Deep Vision consortium. These instruments are the Distributed Temperature Sensor from GFZ and the Televiewer from ALT.

A list of presentations given at the kick-off meeting follows:

- Ragnar Asmundsson, ISOR, coordinator, WP1 and WP5 (HITI_ kick_off_ISOR pdf )

- Philippe Pezard, CNRS, WP3 (Pres_PhP_GFZ pdf )
- Gudmundur Omar Fridleifsson, ISOR, IDDP (Hiti_jan-2007_GOF_ISOR pdf )
- Nigel Halladay, Calidus Engineering, WP2 (HITI_kick_off_CalEng pdf )
- Bernard Sanjuan, BRGM, WP6 (HITIBRGM-2007) pdf
- Jan Henninges, GFZ, WP4 (HITI_kickoff_DTS_web pdf )
- Dimitrios Mendrinos & George Lemonis, CRES, WP7 (CRES_HITI pdf )
- Benoit Gilbert, CNRS, WP3 (HiTI_CNRS_BG2007 pdf )

• October 2007

In October 2007, BRGM campaigned several of Iceland's high temperature geothermal sites for water sampling, to be used in the development of Na/Li and Li isotope chemical geothermometry - extension to 500°C. Pictures

• March 2008

In March 2008, Marie Violay from CNRS/BRGM visited Iceland and sampled cores taken in Krafla and Reykjanes (two of the proposed IDDP sites). This is done in to calibrate borehole resistivity measurements and obtain chemical site-specific properties. Some of the samples will also be placed in the 'Paterson Press' at CNRS, where the cores can be subjected to supercritical water conditions.

 

• June 2008

In June, a team of BRGM scientists visited geothermal sites in Reykjanes, Svartsengi, Nesjavellir and two areas at Krafla, Iceland. Samples of water and steam were taken from boreholes. A couple of wells were sampled very near the IDDP drill site in Krafla. In addition, samples were extracted from two rivers and a couple of shallow wells at low temperature. From the large samples taken, selected isotopic ratios can be used to identify the origin and age of the geothermal water.

 

• August 2008

HITI (also spelled HiTI) meeting will be held in Iceland in August 21-22, 2008. *The final schedule is now available*.

The location for our meeting is at Myvatn, NE- Iceland, very near the first proposed IDDP drill site. The purpose of the meeting is to review all progress that has been made and make decisions on ways to proceed. Our consortium agreement needs to be signed and work procedures during IDDP drilling will need to be clarified.

A link to the conference hotel is here.

.

• HITEN flyer (pdf)
• HiTI poster at Volterra in April 2007 (pdf)