The course will provide a clear understanding of the primary objective of mud logging services, which is surface measurement of drilling parameters, gas data, and geological information. The 5–days course focuses on understanding drilling operations monitored through a mud logging system, helping to understanding the principle of gas measurements, and to comprehend hoe geological descriptions are performed together with the process of building a lithostratigraphic column. By the conclusion of the course, participant will have an improved understanding of the added value of mud logging data, be familiar with all elements related to data quality control, and have the skills needed to challenge the data quality.