Petrophysics: Relevance and development of Petrophysics, rock-forming minerals, influencing factors for petrophysical properties. Properties of pores, e.g. like porosity, volume and content of the pores, saturation, tortuosity, inner surface etc. Density of rocks, determination in the laboratory & on-site, borehole. Relationships to porosity, saturation, proctor density. Magnetic properties: para-, dia-, ferro-, antiferro-, ferrimagnetism. Magnetic properties of minerals and rocks, remnant magnetization, dependency of temperature and pressure. Well Logging: Well logging history and goals. Fundamentals & types of geophysical well logging methods. Technical log data acquisition & equipment. Well log data interpretation. Radioactive, acoustic, radiometric & electrical well logging methods.