A5019750882- Seismic Waves and Analysis
- Advanced Fiber Optic Sensors
- Geotechnical Engineering and Underground Structures
- Seismology and Earthquake Studies
- Reservoir Engineering and Simulation Methods
- Drilling and Well Engineering
- Atmospheric Ozone and Climate
- Tunneling and Rock Mechanics
- Structural Health Monitoring Techniques
- Ionosphere and magnetosphere dynamics
- Geophysics and Sensor Technology
- Mineral Processing and Grinding
- Parallel Computing and Optimization Techniques
- Geoscience and Mining Technology
- Geophysics and Gravity Measurements
- Advanced Data Storage Technologies
- Geophysical Methods and Applications
- Space Technology and Applications
GFZ Helmholtz Centre for Geosciences
2022-2025
Technische Universität Berlin
2023-2025
Geothermal productivity strongly depends on reservoir performance, which is regularly monitored. This work presents the results from Distributed Dynamic Strain Sensing (DDSS or DAS) measurements during restart of injection and production in deep geothermal wells. technology's high spatiotemporal resolution enables monitoring relative strain temperature changes along entire sensing cable. We monitored 3.7 km a producer approximately 4.1 an injector. Both cables were installed post-borehole...
The LUNA Moon analogue facility, jointly operated by DLR and ESA in Cologne, Germany, provides a simulated lunar environment for instrument experiment tests operations training both robotic crewed missions. At the heart of is 700 m2 regolith testbed, filled to 60 cm depth with EAC-1A Mare simulant, which also contains deep-floor area 3 m depth. Before filling hall 500 long fiber-optic cable containing single- multi-mode fibers, as well an engineered fiber, was deployed spatial grid support...
The current renaissance in lunar exploration, driven by space agencies as well the private sector, requires suitable test and training facilities on Earth to proceed a safe sustainable manner. To address this need, DLR ESA have opened Moon analogue facility LUNA Cologne, Germany, September 2024. We will provide an overview of report first campaigns, which already included usage universities, national agencies, sector.At heart is 700 m² regolith hall, filled with Mare simulant EAC-1A...
Achieving well integrity is mandatory for a geothermal well's safe and sustainable operation. One of the most critical steps success primary cementing. Conventional monitoring only shows discrete snapshots after completion cement job. However, optical fiber sensors enable entire cementing process. Here, we investigate placement early hydration surface casing at site in Munich, Germany. We show that distributed dynamic strain rate sensing (DDSS or DAS) allows tracking rising fluid interfaces,...
Reliable well completion technologies are mandatory for the safe and sustainable use of subsurface reservoirs. Achieving integrity requires displacing entire drilling mud with homogenous cement. For this purpose, surface pump parameters (rate, density, pressure, volume) generally measured, yielding average values along borehole. Here, distributed fiber-optic sensing offers new continuous monitoring options dense spatial sampling within a In GFK-monitor project (https://gfk-monitor.de/en/),...
Geothermal reservoirs require reliable well-completion techniques to reach well integrity. Well, integrity means there are no flow paths behind the casing at all. While constructing well, drilling mud must be fully displaced by uncontaminated cement, measured in displacement efficiency. Conventional real-time measurements show average pumping parameters control cement job's success. However, studies issues with worldwide. We aim improve closing an information gap within construction phase...
Seismic microzonation and ambient noise tomography via Distributed Acoustic Sensing (DAS) may contribute to the seismic hazard assessment exploration or monitoring of utilizable utilised subsurface volumes at favorable costs. However, numerous technical aspects remain under investigation further maturate this innovative seismological approach – particularly when applied dark telecommunication fibers. For instance unknown coupling fiber ground presence loops slack disturb regular...
Maintenance of infrastructure is costly and difficult to implement systematically when it spreads over wide areas, such as road or pipeline networks. In the monitoring ways, conventional methods control integrity rely on discrete measurements in space time. There a large demand for innovative technologies that are able assess structural whole regular intervals even continuously. Distributed fiber-optic sensing opens opportunity measure numerous physical quantities temperature strain with...
Efficient, safe and sustainable utilization of geothermal reservoirs depends on reliable well completion monitoring technologies. Conventional borehole measurement methods can only be used after the process usually show snapshots conditions at discrete points in time. Therefore, successful is a risky mainly relies experience driller. By using distributed fiber-optic sensing technologies, it possible to monitor all along cable with dense spatial sampling continuous real-time.In this...
<p>For a successful operation of energy or resources use in the subsurface, exploration for potential reservoir storage horizons, monitoring structural health and control induced seismic unrest are essential both from technical socio-economic perspective.  Furthermore, large-scale surveys densely populated areas difficult to carry out due effort required install sources receivers associated with high financial logistical costs.  Within joint project...