24. júní 2010

Borehole temperature wireline instrument demonstrated beyond 300°C in a high temperature well

Yesterday, June 23rd, Francois Lebert from BRGM was able to demonstrate together with ÍSOR a new temperature measuring tool built and assembled within the HiTI project.

The electrical resistance changes of platinum with temperature are used for recording, using four wireline conductors, two for current feeding and two for voltage readout over the platinum sensor. This analytic tool was designed at BRGM, based on an earlier conception of R. Gable, for operation beyond 300 °C and pressures up to 1000 bar. Its Inconel 625 body is highly resistant to corrosion.

Temperature response times were evaluated at different logging speeds. Calibration was performed at Calidus facilities up to 300 °C.

With this task and the following reporting, BRGM has successfully completed all HiTI deliverables.

A final workshop in the HiTI project will be held in Athens on September 14-15 2010, where these results and other project deliverables will be announced.

BRGM temperature tool before going into a high temperature well at Krafla.

BRGM temperature tool before going into a high temperature well at Krafla.

The tool on its way into the well.

The BRGM tool on its way into well, attached to Calidus high temperature cablehead and high temperature cable from Rochester. ÍSOR logging truck seen on the KS-01 platform at Krafla.

The red curve is recorded using the new BRGM gauge, compared to a previous measurement using Kuster memory tool, taken over one year before (green curve). The well has been heating up.

The red curve is recorded using the new BRGM gauge, compared to a previous measurement using Kuster memory tool, taken over one year before (green curve). The well has been heating up.