PHOTOGRAMMETRY AND 3D IMAGING SYSTEM FOR SUBSEA SYSTEMS INSPECTION - MOORING INSPECTION ON P-51

Petrobras foresees a scenario, in 2025, of extensive utilization of FPSOs in production activities in the Brazilian pre-salt. Besides future installations, Petrobras has an extensive mature oil and gas production fleet, some of which will be decommissioning in the following years. Mooring line inspection quality and reliability are of utmost importance in assessing mooring systems integrity, supporting decision making and risk management during design life (e. g., anticipating line breakage, avoiding loss of position and disruptions in production). In more mature systems, accurate information can improve in the planning about parallel decommissioning projects. In this way more accurate and reliable inspection methods using 3D laser imaging and photogrammetry are being sought, enabling remote Diverless applications and creating highly accurate 3D models. In addition to improving result reliability, this technological innovation also makes it possible to evolve towards solutions with Digital Twins and artificial intelligence, further developing the integrity assessment of mooring systems. At the end of 2022, a pilot test with one of these technologies was conducted on one of mooring lines. This article aims to reveal the results and discusses next steps, bringing potential benefits as man-hours risk exposure reduction and result reliability.