GeoEnergy 2023

The global green shift ... fluctuating

Utilizing the energy system approach to match surface energy needs with local geological possibilities and technological solutions to provide energy services at low costs.

Ground source heat pump systems have the potential to extract around 33 TWh/year from the ground, in addition comes industrial applications. However, historically, Norwegian building owners have favoured electric heating due to large access to cheap electricity from hydropower. As a result, hydronic heating systems, which are a prerequisite for ground source heat pumps, are largely absent in Norwegian buildings. As society becomes more electrified, there will be a future shortage of electricity and grid capacity in Norway. Ground source heat pump and high-temperature seasonal thermal energy storage (GeoThermos) solutions are among the most promising and sustainable measures to mitigate this shortage, even during cold winter days.

The city of Munich together with a number of surrounding communities have been realizing geothermal projects as part of an energy transition since the turn of the century. The combination of a significant heat demand, a positive political framework and the favourable geological setting of the South German Molasse Basin are the main reasons for success. This has established geothermal know-how and allowed for regional development of the geothermal sector over the last two decades unseen anywhere else in Germany. The general absence of exploration wells for geothermal projects means there is little opportunity to build exploration data sets for play definition and to test technologies. However, the large number of successful wells drilled in the Molasse Basin have allowed an iterative development of employed technologies and methodologies. Over the last few years demand has risen and is exacerbated by the current energy crisis. With space becoming scarce in the greater Munich area, the development of geothermal projects in the "traditional" way is no longer practicable. The political framework as well as the individual project approach must adapt, to allow upscaling of geothermal heat production. This includes the standardised use of 3D Seismic data and multi-well projects with multilateral completion.

Geothermal heating solutions has the potential to be an important contributor to the current energy supply crisis and climate change. The awareness of these solutions are slowly getting more and more attention as the energy cost for housing associations, property owners and developers have increased the last years. Commercial and competitive solutions are available and savings can be substantial.

The high temperature borehole thermal energy storage (HT-BTES) system planned in Furuset Oslo by Hafslund Oslo Celsio will store waste heat available during the summer in the underground.

During the winter will the heat, stored with a maximum temperature of 95 degrees Celsius, be utilized to heat a new low temperature city district heating network without the use of a heat pump.

This presentation will present the latest design, cost benefit analysis based on the subsurface investment costs, and potential impacts on the local environment.

Sweco has calculated the potential investment costs per effective stored energy unit for six different HT-BTES configurations.

The presentation presents the method and limited results of the study.

Recent technological advances to meet geothermal energy extraction challenges. Drilling is the key cost element hindering large scale utilization.

Drilling for geothermal sounds similar yet different from oil & gas drilling, and is frequently an expensive and slow endeavour. Why is that? Geothermal resources are historically found in geologic hot spots in highly fractured and hot formations, while newer geothermal technologies target a wider range of subsurface targets, ranging from warm sedimentary basins to igneous rock. This talk will review currently industry practices in drilling of geothermal wells, both in sedimentary and basement rock, will highlight current challenges and opportunities, and explore new ideas and technologies.

Geothermal energy although in its infancy will play a big part in the transition to a more sustainable European future. The challenges of geothermal lie mainly in the exploration phase and system development phase. Currently the most common form of geothermal systems used today are hydrothermal systems but the potential of petrothermal systems exceeds it greatly. Developing new drilling technologies to facilitate tapping into this potential is the key to unlock it. Efforts of the Drilling Simulator Celle together with NORCE and ARMINES/Mines ParisTech are underway to facilitate testing of new technologies and ameliorate the drilling process for such systems.

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Geothermal energy is a promising renewable energy source that has gained significant attention in recent years through a significant increase in geothermal drilling activities due to its potential to reduce greenhouse gas emissions and provide a stable source of energy.

Drillmec, with more than 45 geothermal drilling rigs built and delivered and decades of expertise, will present the latest technological advancements in drilling rig design for geothermal operations, such as drilling systems and automated drilling processes, and their potential to improve drilling efficiency and safety and reduce costs.

We all need to promote the many benefits of Geothermal Energy. While 97% of Norwegian electricity is produced from hydropower, the growing demand force us to use local Geothermal Energy for heating and cooling purpose. The deployment of geothermal energy will therefore play a significant role in meeting the future energy demand and at the same time increase the nation's rate of decarbonization and autonomous energy supply. Such possibilities would serve the needs of various stakeholders, from citizens to construction and development professionals, while reducing carbon footprint and energy bills. In this journey, SLB believes new technology and collaboration will play a crucial role.

Automation has been shown to have a considerable positive impact on cost and safety in offshore drilling operations. In this talk we will give a short overview of our research activities within drilling automation, from research idea to solutions which are in daily use. We will introduce results and lessons learned from our successful experiment on demonstrating autonomous drilling on a full scale offshore type rig. By autonomous drilling we mean a system that is capable of taking its own informed decisions based on continuous evaluation of current conditions. In total, 500 m were drilled by the autonomous system developed in the project, in very challenging conditions and without incidents which could not be recovered from.

Anders Nermoen, NORCE