Abstract: The present invention provides the use of usual operational sensors of pressure, temperature, flow and specific mass already installed and available in oil and gas pipelines and methods of statistical inference, optimization and artificial intelligence that allow detection and location of leaks in pipelines. The invention has the following components: sensor communication module (1); statistical tools for compensation of measurement and model uncertainties (2); automatic leak detection techniques (3); leak locator (4); graphical user interface (5); measuring sensors (6); flow simulator (7); historical database (8).