Análise comparativa de confiabilidade de poços em diferentes configurações de abandono temporário

Abstract

The dissertation compares the reliability of different well configurations while under temporary abandonment status. A constant failure rate model is used along with failure rates from the offshore industry databases. The failure rate of a plug, one of the most commonly used barrier element for temporary abandonment, is obtained from a significant operator database. Furthermore, this work develops the failure rate calculation, tests the model sensitivity to this value’s uncertainty and compares the model with relatively similar ones available in the literature. The results from the comparative analysis are presented, showing that all scenarios analyzed are at least as safe as a well in production phase. However, different settings will result in different reliability values and, some cases, might be significantly more reliable than others.