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Type: Artigo de evento
Title: Well Integrity Analysis Applied To Workover Prediction
Author: Da Fonseca T.C.
Miura K.
Mendes J.R.P.
Abstract: Well integrity may be defined as the well's capability to prevent leaks to the environment and is therefore a very important feature for oil and gas wells. Its importance has grown in past years, especially after recent events have shown the impact of oil spills on the operators' financial wellness. One way to avoid leaks during well operation is performing maintenance interventions, or workovers, seeking to keep redundancy in the well's safety barriers throughout the well production life. Cost assessment regarding the wells maintenance interventions shall be done during the well design phase of the Production Development project, when the wells construction campaign is both technically and economically evaluated. This work presents a methodology for well integrity analysis based on the concept of Barrier Integrated Sets (BIS) and on Reliability Engineering techniques. Through the computation of the mean time to failure of each BIS identified in the completion configuration it is possible to estimate when the well hits a degraded status, in which it relies on a single BIS and when the well is expected to leak, i.e. there are no BIS in place. These estimations may be used for a well workover interventions resource assessment, in a well construction and operation campaign. Copyright 2013, Offshore Technology Conference.
Editor: Offshore Technology Conference
Rights: fechado
Identifier DOI: 
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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