Estudo das métricas de confiabilidade de um módulo de controle submarino aplicado em produção de petróleo no pré-sal

Abstract

This work developed a quantitative and qualitative reliability study focused in a critical asset which is part of the oil and gas Subsea Production System, this equipment is the Subsea Control Module (SCM). As a benchmark for this study it was used the Offshore and Onshore Reliability Database, known as OREDA which has failure data information about similar equipment applied all over the world in different environments and by different customers. The methodology proposed by this study was applied on the SCMs installed and operating in the brazilian pre-salt. The development of the work was based on the functionality analysis of the system as well as its critical subsystems, and on the failure data gathered from the field operations. The data was collected from a population of 89 SCMs, this dataset was analyzed and processed through statistical methods to determine which statistical distribution adjust better to the dataset in order to evaluate the failure pattern of the system. As part of the study all the reliability metrics were compared with the OREDA 2015 benchmark with the objective to identify improvement opportunities. As final results from the study it was possible to determine the subsystems that impact the SCM's reliability metrics, as well as calculate the reliability, failure rate and mean time between failures of the system that enabled to fit the SCM as a system that is performing above the average as per OREDA benchmark. It was possible to demonstrate the methodology applied in this study works very well to increase the visibility of the asset performance, as well as identify improvement opportunities focused on increasing system reliability.