Important geological measurements 3D seismic Kurpfalz.
In the winter of 2022 to 2023, a 3D seismic was carried out in the Kurpfalz region for around three months.
We measured the underground to obtain an accurate picture of the geological conditions on site. To do this, we laid out geophones that precisely registered the sound waves generated for measurement. The measuring vehicles first drive along the specified and authorised roads and paths. The controlled measurements are then taken approximately every 50 metres, with a single measurement process taking a total of one to two minutes and the measurement itself only about 40 seconds.
These measurements are used for quality assurance. The recorded data also gives geologists a very precise picture (analogous to an ultrasound measurement) of where the largest reservoirs for deep thermal water are located and how they can be reached most safely. The measurement area included parts of the Mannheim squares, Sandhofen, Viernheim, Käfertal and Friesenheimer Insel.
3D seismic What is a 3D seismic and how does it work?
A 3D seismic is a geophysical exploration of the subsurface. To this end, vibro-trucks drive along roads and paths in the exploration area. With the help of a lowerable vibration plate, they generate seismic waves that are injected into the ground. These waves are then refracted by different layers of rock underground, reflected and recorded by the geophones. The measuring network, made up of measuring and vibration points, determines the distribution of the points and is also adapted to the infrastructural conditions on site. In addition to the existing road network, this also includes pipeline networks, specifications relevant to nature conservation law, potential old explosive ordnance, the location of sensitive buildings, etc. Based on the data obtained using this method, the geological structures in the subsurface can then be determined using further complex analyses and modelling.
3D seismic Why do you need a 3D seismic?
A 3D seismic enables a more precise and comprehensive recording of geological structures and layers in the subsurface. Using this method, we can therefore locate hot water reservoirs. Only on the basis of this complex data is it possible to determine optimal locations for the sustainable and safe extraction of both heat and lithium from thermal water.
Information about the structure and composition of the earth’s interior is essential for the successful realisation of our geothermal project.
By the way: Seismology is the technique of using seismic waves to obtain information about the subsurface, while seismicity describes the observable earthquake activity in a region.
3D seismic Why are measurements also taken in urban areas?
Even in places where Vulcan obviously won’t be building a power station or drilling site, we still have to lay out geophones and take measurements. This is the only way to achieve a comprehensive picture of the underground. After all, all geophones pick up sound waves.
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