Carreamento de mídia em peneira molecular de um FPSO – Um estudo de caso
Data
2022-08-04
Autores
Monteiro, Beatriz Pierobão [UNIFESP]
Orientadores
Diniz, Anthony Andrey Ramalho [UNIFESP]
Tipo
Trabalho de conclusão de curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Resumo
O processamento primário dos fluidos produzidos pela indústria de petróleo offshore é uma etapa essencial para o transporte, tratamento e utilização deste recurso, por se tratar do momento em que a corrente multifásica, que chega dos poços, tem seus componentes separados. Atualmente, as operadoras de petróleo comumente utilizam plataformas do tipo FPSO (Floating Production Storage Offloading), que produzem o petróleo, realizam o processamento primário dos fluidos, armazená-los e fazem a transferência de óleo para navios aliviadores ou gás para a costa, através de gasodutos. O Pré-Sal brasileiro contém gás natural em abundância, o que exige que esses FPSOs possuam um sistema robusto de processamento de gás, para que ele atinja os requisitos determinados para exportação, queima, reinjeção no reservatório, etc. Desta forma, o objetivo do trabalho foi abordar um estudo de caso de um evento ocorrido em um FPSO, cuja peneira molecular, que trata-se de um dos equipamentos do sistema de processamento de gás, apresentou falhas e promoveu carremento de mídia. Para a elaboração do trabalho, foram utilizados arquivos científicos para a pesquisa bibliográfica sobre o assunto, e o relatório técnico do incidente para obtenção de informações sobre o ocorrido. A partir deste estudo, pôde-se concluir que o aumento do diâmetro do orifício antes da peneira gerou uma taxa de despressurização maior, aumentando a velocidade da passagem do gás pela peneira, causando o carreamento de mídia. Para solucionar este problema, foi necessária a diminuição do diâmetro do orifício, e a mudança da lógica de abertura e fechamento de válvulas.
The primary processing of fluids produced by the offshore oil industry is an essential step for the transport, treatment and use of this resource, as it is the moment when the multiphase current, which arrives from the wells, has its components separated. Currently, oil operators commonly use FPSO (Floating Production Storage Offloading) type platforms, which produce oil, perform primary fluid processing, store them and transfer oil to relief vessels and gas to the coast, through of pipelines. The Brazilian PreSalt contains natural gas in abundance, which requires these FPSOs to have a robust gas processing system, so that it meets the requirements determined for export, flaring, re-injection into the reservoir, etc. In this way, the objective of the work was to approach a case study of an event that occurred in an FPSO, whose molecular sieve, which is one of the equipment of the gas processing system, presented failures and promoted media carryover. For the elaboration of the work, scientific files were used for the bibliographic research on the subject, and the technical report of the incident to obtain information about what happened. From this study, it could be concluded that increasing the diameter of the orifice before the sieve, generated a higher depressurization rate, and increased the speed of gas passage through the sieve, causing media carryover. To solve this problem, it was necessary to reduce the orifice diameter, and to change the valve opening and closing logic.
The primary processing of fluids produced by the offshore oil industry is an essential step for the transport, treatment and use of this resource, as it is the moment when the multiphase current, which arrives from the wells, has its components separated. Currently, oil operators commonly use FPSO (Floating Production Storage Offloading) type platforms, which produce oil, perform primary fluid processing, store them and transfer oil to relief vessels and gas to the coast, through of pipelines. The Brazilian PreSalt contains natural gas in abundance, which requires these FPSOs to have a robust gas processing system, so that it meets the requirements determined for export, flaring, re-injection into the reservoir, etc. In this way, the objective of the work was to approach a case study of an event that occurred in an FPSO, whose molecular sieve, which is one of the equipment of the gas processing system, presented failures and promoted media carryover. For the elaboration of the work, scientific files were used for the bibliographic research on the subject, and the technical report of the incident to obtain information about what happened. From this study, it could be concluded that increasing the diameter of the orifice before the sieve, generated a higher depressurization rate, and increased the speed of gas passage through the sieve, causing media carryover. To solve this problem, it was necessary to reduce the orifice diameter, and to change the valve opening and closing logic.
Descrição
Citação
MONTEIRO, Beatriz Pierobão. Carreamento de mídia em peneira molecular de um FPSO – Um estudo de caso. 2022. 33 f. Trabalho de conclusão de curso (Graduação em Engenharia de Petróleo) - Instituto do Mar, Universidade Federal de São Paulo, Santos, 2022.