Deep drilling research, which allows us to uncover the hidden secrets of the Earth’s crust, is one of the most exciting and cutting-edge fields of Earth sciences.
During deep drilling research, we use specialized instruments to examine the walls of the boreholes, properties of rocks, movement of fluids with geophysical methods. This information helps us gain a better understanding of the Earth’s internal structure, geothermal energy potential, water resources, and environmental changes.
In Latvia, we conducted comprehensive borehole measurements in almost 900 meters deep wells in June 2019. This marked the first time we applied nuclear magnetic resonance (NMR) tests in such large-diameter drilling for industrial research purposes. In addition to NMR tests, we also performed spectral-gamma, natural gamma, caliper, and temperature measurements.
- NMR tests are methods that allow us to determine the porosity, water content, and permeability of rocks. These properties are essential to estimate the amount of geothermal energy that can be extracted from a particular area.
- Spectral-gamma and natural gamma measurements are methods that help determine the mineral composition and lithology of rocks. These properties are vital to identify the types of rocks present and understand their formation.
- Caliper measurement is a method that allows us to determine the diameter and shape of the borehole. This property is crucial to assess the drilling quality and understand how the geometry of the borehole influences other measurement results.
In early January 2020, we conducted vertical seismic profiling (VSP) measurements in the same borehole in collaboration with a Lithuanian company, Geobaltic. The seismic vibrators were provided by our Lithuanian partner, and our task was data collection and analysis. VSP measurements are methods that allow us to determine the seismic velocity and impedance of rocks. These properties are crucial to identify the seismic waves propagating in the Earth and how they reflect from rock boundaries. The advantage of VSP measurements is their high resolution and accuracy in determining the seismic properties of rocks.
The re-interpretation of the region’s 2D seismic profiles was based on the borehole and VSP measurements. This information helps us gain a better understanding of the geological structure, tectonic movements, and geothermal potential.
In conclusion, deep drilling research is a highly useful and fascinating method that provides valuable insights into the Earth’s depths. Our company is proud to have been part of this project and looks forward to many more opportunities in the future.
If you would like to learn more about deep drilling research, please visit our website or send us an email.