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The representation is made as a vertical section along the borehole, whereby each layer is represented by a standardised symbol or colour scheme. This clear labelling ensures that soil types and rocks can be clearly distinguished from one another. Depth information supplements the visualisation and creates a direct reference to the actual drilling depth. This combination of graphic overview and metric accuracy creates a clear basis that remains comprehensible regardless of the text component.

In construction practice, the drilling profile is used to create a sound basis for planning. Engineers can use the profile to quickly decide which construction methods are suitable and where potential risks lie. It is also important in environmental protection, as it provides information on layer permeability and groundwater levels. Clients and authorities also benefit from the easy-to-understand format, which makes technical content more tangible.

The drilling profile is also valuable for geoscientific research. It documents geological deposits and helps to reconstruct the developmental history of a region. It is particularly indispensable in comparative studies of different locations because it provides objective and comprehensible data in graphical form. It thus combines the requirements of technical documentation with scientific precision.

There are binding standards for the creation of drilling profiles that ensure a standardised presentation. DIN 4023 (drilling profile), which specifies the graphical representation, and DIN 4022 (soil and rock characterisation) for the systematic description of the layers are decisive here. In addition, ISO 14688 is used internationally to standardise the naming and classification of soils. These specifications ensure that drilling profiles remain comparable regardless of the project or region.

The typical contents of a drilling log include details of the drilling equipment, the method used and the start and end times of the drilling. The depth reached, the drilling speed and special incidents such as obstacles or technical problems are also documented. In addition, information on auxiliary equipment such as flushing, pipework or accessories used is also included. This information provides a complete basis for a precise understanding of the drilling conditions at a later date.

In practice, the drilling log fulfils various tasks. On the one hand, it serves as quality assurance and can be used as legal proof if questions arise regarding proper execution. On the other hand, it provides engineers, geologists and clients with the basis for decisions on construction methods, safety measures or cost planning. Thanks to its clear structure, it also supports communication between all parties involved and thus contributes to the efficiency of a project.

The drilling log also has a firm place in scientific contexts. It provides comprehensible documentation that is indispensable for comparing different investigations. It also creates transparency, as it records not only the results but also the process by which they were obtained. In this way, it contributes to making geological data permanently usable and verifiable.

The preparation of drilling logs is regulated by standards to ensure standardisation and comparability. Of particular relevance is DIN 4021,, which contains clear specifications for the logging of boreholes. In addition, DIN 4022, is used to standardise the description of soil and rock materials. At international level, ISO 22475 is also used, which standardises geotechnical exploration, sampling and groundwater measurements. These standards ensure that drilling logs are technically robust and internationally understandable.

The list describes the layers encountered in their characteristic form. This includes information on appearance, texture and consistency, but also on special features such as odour, inclusions or differences in colour. Equally indispensable is the depth information, which defines the exact boundaries between the layers. This creates a continuous visualisation of the subsurface that remains comprehensible regardless of personal impressions.

There are many possible applications for the stratigraphic log. In civil engineering, it serves as a basis for assessing bearing capacity, groundwater conditions or possible subsidence. For environmental assessments, it provides information on the permeability and stratification of the soil, which can be decisive for the assessment of contaminated sites or groundwater movements. In geological research, on the other hand, it provides material for reconstructing historical deposits and developments.

A precise layer catalogue gives the drilling documentation its true significance. It provides a clear view of the subsurface, reduces uncertainties and creates confidence in further analyses. This makes it a key tool that plays a decisive role in the success of planning and projects.

Standards are essential to make a strata catalogue consistent and comparable. This includes DIN 4022,, which describes and standardises the approach to soils and rock. It is supplemented by DIN 4023, which is closely linked to the visualisation of layer sequences in the drilling profile. At international level, ISO 14688 ensures standardised classification and terminology. Together, these standards create the basis for transparent, technically correct and supra-regionally comprehensible documentation of drilling results.