Our aim is to attempt to sample and produce high temperature geothermal fluids from supercritical pressure-temperature conditions with the eventual goal of using these fluids for energy production.
IDDP 2 Q&A
The drilling operations began on 11 August 2016
The aim with the deep well is to find supercritical fluid. Supercritical fluid has a higher energy content than „conventionaly used geothermal steam“. Thereby it may be possible to produce more energy from each well, hence drill less number of wells than conventionaly. This could lead to reduced land use and environmental impact and possibly also reduced cost of production.
In this project there are many challenges and unforeseen conditions that have to be dealt with.
The intention is not to drill into magma.
Not possible to answer in any detail before completing the drilling and testing of the well.
It is very much possible that this could be applied elsewhere in high temperature geothermal fields as well.
Mainly the fact that this is the first time drilling is being performed in stratified rock formation and dyke complexes at this depth. Given that this is the first time drilling under these conditions is endeavoured it is not known what to expect e.g. what type of rock formation to be penetrated, fractures, unstable formation, permeability, petrophysic of the rock, fluid chemistry, gas pockets, induced seismisity etc. One of the goals is to enter into formation/reservoir at very high temperature, above 400°C i.e. temperature around or above the critical temperature of the reservoir fluid. Reservoir fluid at or above the critical temperature has totally different physical properties than fluid at lower temperature than the critical.
The well is drilled with similar equipment as used in the IDDP 1 well but the well itself is of different design i.e. the well is a deviated one, of different diameter, slightly different type of casing steel etc. The drilling rig on the project is electrically driven, as opposed to conventional diesel powered rigs.
The well is a scientific well i.e. during drilling extensive scientific work is undertaken which will help us to refine the design of the next IDDP well. After warming up, the well will hopefully convey some kind of fluid/steam/gas up to the surface and into a pilot plant.
That is still impossible to say. The aim is to source supercritical fluid , which has a much higher energy content than conventional high-temperature geothermal steam . If successful, this could reduce the environmental impact and the cost of geothermal exploitation. Another result might be a deep injection well in the existing geothermal field.
The well is now about 3.850 m deep and the aim is to drill to 5.000 m.
The total estimated cost is about USD 15 million, including geoscience- and engineering work prior to drilling, site preparations, directional drilling, coring, downhole logging, stimulation, flow testing and reporting.