CPV code 71351400 designates Petrophysical interpretation services in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
71351400 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 71351000 (Geological, geophysical and other scientific prospecting services).