Core sample drilling is one of the techniques used in exploration and prospecting. This technique is mainly employed in undersea or underground mining. In this type of drilling, a core sample is brought to the surface for examination. The reason why this sample is examined is to analyze the properties, such as the permeability or porosity of underground rocks. Other than that, the unique features of a particular zone are also investigated to determine whether there is the presence of oil, gas, and other minerals.
Another reason why this technique is employed is to get fine-grained samples of deposits from the seabed in a manner that will not sequence of the deposition. Scientists have been able to study the history of the deposits and ancient oceanic events by studying interstitial water, micro-fossils, and mineral grains.
This is not all. There are a number of other applications that this drilling method is used that we’ll discuss at another point.