Decarbonization in Offshore Services: A Study on Efficiency and Emissions Reduction

Abstract

Abstract This study provides a comprehensive review of recent discussions on carbon equivalent emission reduction alternatives, emphasizing the importance of efficiency in Offshore Supply Vessels (OSVs). It introduces relevant indicators tailored for assessing ship efficiency in the specific context of subsea installations offshore. The examination of new technologies spans from enhanced navigation devices to minimizing fuel consumption during dynamic positioning. Safety considerations, crucial for OSVs operating near other structures, are addressed alongside the efficiency analysis. To gauge the effectiveness of these measures, the study conducts a comparative analysis of fuel consumption indicators across the fleet of the major Brazilian oil company, accounting for operational nuances and propulsion capabilities. In the realm of subsea installation services, the engineering challenge lies in balancing propulsion power to ensure vessels can maintain position even in worst-case failure scenarios. Given the diverse activities of the offshore supply fleet, involving tasks such as human diving, ROV missions, tug support, and subsea equipment handling, the study introduces efficiency indicators based on a comprehensive database analysis. The focus shifts to comparing efficiency across different vessels and their respective activities, highlighting the importance of strategic vessel selection to operate at each site. This extends beyond propulsion systems, considering the vessel's effectiveness in varied sea states. Inherently different from traditional cargo transporters, OSVs play a crucial role in attaining emission reduction objectives. The study draws on the analysis vessels currently operational in Brazilian offshore, equipped with ROV onboard. By evaluating key indicators for optimal efficiency, the research contributes valuable insights to emission reduction initiatives, aligning with the overarching goal of steering towards a net-zero trajectory.