An integrity analysis approach for development wells

Mendes, José Ricardo Pelaquim; Fonseca, Tiago Cardoso da; Miura, Kazuo

doi:10.1007/s40430-015-0479-1

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…The loss in market value of the British Petroleum Company (BP) after the Macondo blowout demonstrates the material losses an accident can cause during well construction activities. (Mendes et al, 2016). Moreover, the Brazilian National Petroleum, Gas, and Biofuels Agency (ANP), in 2017, reported that an explosion on a drilling rig had led to human losses, which highlights the complexity of oil well drilling operations and reinforces that ensuring safety is a crucial point in such activities.…”

Section: Introductionmentioning

confidence: 99%

Integrated Evaluation of Cement and Kick Scenarios in Oil Well Design

Melo

Tenório

Oliveira

et al. 2019

BJPG

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The present work aims to develop a case study using the casing well interface (CWELL), developed by the Federal University of Alagoas, Brazil. Considering the well critical environment during the gas kick along with wait on cement (WOC) test and cement displacement, we sought to observe the behavior of different casing pipes regarding the stress submitted. The case study analyzes an offshore vertical well, with a water depth of 1574 meters. The well was subjected to a kick of 50 bbl and with an inflow gradient of 2.0 lb/gal. Triaxial loads were obtained through the von-Mises and American Petroleum Institute (API) envelopes, which can be used to analyze the integrity of the tubes. Through the analysis between the resistances returned by Petroleum Engineering Applications System (SAEP), it is possible to verify the possibility of failure of the tubes for each project scenario. This analysis is important for determining the sizing of the columns to obtain the best performance of the structures.

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Section: Introductionmentioning

confidence: 99%

Integrated Evaluation of Cement and Kick Scenarios in Oil Well Design

Melo

Tenório

Oliveira

et al. 2019

BJPG

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“…Resultados obtidos através da metodologia proposta, considerando elementos de barreira alternativos (backup) e 27 anos de missão (Mendes, 2016 …”

Section: Tabelaunclassified

Confiabilidade De Sistemas De Barreiras De Segurança Em Poços De Petróleo Pelo Método De Monte Carlo

BOUCAS¹

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There are three principles that must be followed in the design of oil wells: safety, productivity and environmental protection. Throughout the well's life there must be equipments that allow the operations to be carried out safely. The integrity of an oil well is critical to ensure such safety. Safety barrier elements are the basis of integrity management and therefore need to be suitable and work properly. Integrity is the containment of the well fluids, preventing hydrocarbons spills to the environment and between producing zones. The oil industry has faced several accidents throughout its history (eg Montara's field, Macondo's field, Frade's field) and such tragic events demonstrate the hazardous potential that the Oil and Gas industry may have. Millions of dollars are lost each year due to inefficient maintenance and unscheduled well shut-ins. Costs are very high, but possible threats to the environment and hazards to human life should be the top priority. This is why there is a growing concern and focus on the well's integrity.This work presents a methodology to verify the reliability of a barrier system in oil wells, providing a method able to compare different configurations of subsea wells, through simulations, using Monte Carlo Method. In order to verify the importance of some of these barrier elements in the system, some studies were conducted varying the failure rates of the studied element in question, leaving the other rates unchanged. In the end, a comparison of these results was made, observing which ones need to be even more reliable.

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“…Uma metodologia para avaliar a probabilidade de perda de contenção de poços submarinos durante a fase de produção considerando taxas de falha variáveis no tempo foi desenvolvida por (Alves & Netto, 2013). (Mendes, Fonseca, & Miura, 2016) também abordam o tema integridade de poço durante a fase de produção e, através de cálculo de parâmetros de confiabilidade, estima quando o poço está em estado degradado de integridade e quando é esperado perda de contenção. A abordagem é conservadora, não considerando elementos de barreira alternativos, mas apenas os elementos mínimos dos conjuntos solidários de barreira primário e secundário.…”

Section: Integridade De Poçounclassified

“…Tais diagramas permitem uma visualização simplificada de todas as possibilidades de Um poço submarino de petróleo é um sistema complexo que pode ser modelado de diversas formas. Em (Mendes, Fonseca, & Miura, 2016) a modelagem é feita através de árvore de sucesso, em (Alves, 2012), (Zanetti, 2014) e (Zulqarnain & Tyagi, 2015) é feita com uma árvore de falhas, em (Colombo, et al, 2020) No capítulo seguinte, em que as etapas da metodologia serão aplicadas para um poço exemplo, será discutido qual a técnica de modelagem de sistema mais se adequa ao caso específico com base no fluxo da Figura 12.…”

Section: Metodologiaunclassified

Proposição de metodologia baseada em confiabilidade para gerenciamento da integridade de poços em produção.

Müller¹

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Well integrity can be defined as the well's ability to contain fluids, preventing unwanted leakage into the environment. For a proper management of well integrity during the operational phase it is necessary to define techniques and periodicity of testing, inspections, and monitoring. However, during the well integrity management process testing, inspection or monitoring plans may not be adequately adhered to and failures or degradations in well safety barriers may be identified, increasing the risk previously assumed by the well project. Thus, reliability and risk analysis can be used to assist in decision making regarding operational continuity. But how much reduction in well reliability is acceptable? For how long? How effective is each possible action in increasing system reliability? This work addresses the questions raised through the development of a methodology for well integrity management based on the comparison between well design reliability and the reliability of well barrier elements during operational phase considering evidence of success and failure obtained from inspection and testing. As a reference case, a typical subsea oil well from the Brazilian pre-salt is used and the functional relationship between the barrier elements is modeled. The reliability data used comes from recognized international databases. In such methodology is possible to use constant or variable failure rates over time and the relative reliability of the well system is calculated at each moment, considering the knowledge acquired in tests and inspections of components during the operational phase. Such methodology assists in determining the current risk level of the well in production, the need or not for a workover and proposes a maximum reliability-based timeframe for maintenance intervention. Results are critical as a technical foundation for risk management support and decision-making regarding well integrity during operational phase.

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An integrity analysis approach for development wells

Cited by 8 publications

References 5 publications

Integrated Evaluation of Cement and Kick Scenarios in Oil Well Design

Integrated Evaluation of Cement and Kick Scenarios in Oil Well Design

Confiabilidade De Sistemas De Barreiras De Segurança Em Poços De Petróleo Pelo Método De Monte Carlo

Proposição de metodologia baseada em confiabilidade para gerenciamento da integridade de poços em produção.

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