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08541 Assessment of CO2 Corrosion Damage Distribution in Oilwells by Deterministic and Stochastical Modelling

Product Number: 51300-08541-SG
ISBN: 08541 2008 CP
Author: Raymundo Case
Publication Date: 2008
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In the present paper, an a priori corrosion damage distribution assessment methodology is implemented to study the production casing failures observed in oilwells operating within a mature oilfield (Oritupano A, Venezuela). The methodology developed aims at the assessment of corrosion damage and subsequent probability of failure. The study approach is based on the mechanistic modelling of CO2 corrosion coupled with a stochastical simulation for the associated corrosion damage distribution The stochastical model developed for the assessment of the corrosion related damage distribution was based on the simulation of the CO2 corrosion mechanisms. The results obtained from the evaluation of the model proposed shows that it can quantitatively indicate the transition from uniform damage distribution to localized forms of CO2 corrosion attack.
In the present paper, an a priori corrosion damage distribution assessment methodology is implemented to study the production casing failures observed in oilwells operating within a mature oilfield (Oritupano A, Venezuela). The methodology developed aims at the assessment of corrosion damage and subsequent probability of failure. The study approach is based on the mechanistic modelling of CO2 corrosion coupled with a stochastical simulation for the associated corrosion damage distribution The stochastical model developed for the assessment of the corrosion related damage distribution was based on the simulation of the CO2 corrosion mechanisms. The results obtained from the evaluation of the model proposed shows that it can quantitatively indicate the transition from uniform damage distribution to localized forms of CO2 corrosion attack.
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