Borehole logging

Testing and assessing well output calls for a range of measurements that yield information about the characteristics of boreholes and their capacity, as well as the characteristics and properties of each geothermal system. The same applies to well stimulation aimed at increasing the output of both new and older production wells. Well testing is a key element in the drilling of exploration and production wells, in well maintenance, and in recording information about each geothermal field.

ÍSOR operates logging trucks along with a wide range of other recording equipment and tools for carrying out borehole measurements. ÍSOR has provided this service across almost all of the country's low- and high-temperature systems, and widely abroad.

ÍSOR's services for testing and assessing geothermal wells

Borehole logging
Well stimulation
Output measurements
Borehole condition surveys

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Related projects

Ongoing2022

COMPASS – casing & cementing of deep wells

ON Power

The project concerns the preparation for deep drilling and aims at solutions so that casings can withstand the strain that arises when high-temperature wells heat up. This is to be done, among other things, by examining cementing with "foam cement", a light and flexible cement that reduces the load on the casing. A method will be developed for releasing the pressure that builds up between casings (ÍSOR), corrosion protection by cladding will be specially examined, and corrosion tests will be carried out at the surface and down the well with a logging wire (ÍSOR). An integrated casing system designed to withstand supercritical conditions (including the use of expansion joints) will be tested in experiments at SINTEF in Norway, which also handles the simulation of boreholes.

Completed2020

RESULT – enhancing reservoirs in urban areas

TNO

For green cities (mission Horizon Europe), geothermal energy is expected to be used widely in urban areas for heating instead of fossil fuels. Geothermal utilisation in urban areas can be complex — even though the geothermal systems are relatively well known. The main aim is to demonstrate the possibility of a 30–100% increase in the main geothermal use for heating in urban areas in the northern part of the EU. RESULT achieves this by applying 1) optimisation methods and drill-and-learn approaches, 2) model calculations and uncertainty assessment, 3) using the best technology, 4) optimising methods for different conditions in Europe. The innovations will be 5) used in the design and drilling of doublet wells in the Netherlands.