The influence of low amounts on in situ-polymerized bisphenol-diamine net in cement slurries prepared in seawater – structural analysis after long-term contact with in situ-generated mud-acid fracturing fluid - IMT Mines Alès Access content directly
Journal Articles Revista Matéria Year : 2020

The influence of low amounts on in situ-polymerized bisphenol-diamine net in cement slurries prepared in seawater – structural analysis after long-term contact with in situ-generated mud-acid fracturing fluid

Influência de pequenas quantidades do bisfenol-diamina polimerizado in situ em pastas de cimento preparadas com água do mar-análise estrutural após longo tempo de contato com fluído de fraturamento mud acid gerado in situ

Abstract

Inadequate zonal isolation in oil wells can provoke safety and environmental problems. New cement slurries can avoid such problems. In this work, novel cement slurries were prepared in the presence of seawater with in situ-formed epoxy resin–ethylenediamine. The new slurries were tested in relation to their mechanical properties and characterized by FTIR, XRD, TG/DTG, porosimetry by N2 adsorption-desorption and solid-state 29Si and 27Al NMR. Some kinetic features of long-term contact of the slurries with in situ-generated mud-acid were performed to evaluate the performances of the new slurries in routine acidizing procedures in oil well industry. The experimental kinetic data were well fitted to order-variable exponential kinetic model and a factorial design of four variables (24). In these studies, it was possible to evaluate in detail how some important experimental factors act on the quantities of acid that interact with the pastes, as well as to verify how these factors affect the speed with which the mud-acid interacts with the slurries. The results strongly suggest that the interactions occurred at epoxy/ethylenediamine cement slurry/mud-acid interfaces are due to surface reactions with preservation of the chemical structures of the cement slurries, even after long-term contact with mud-acid. The new cement slurry present good features to be used in environmental-friendly procedures in oil well field.
O isolamento zonal inadequado em poços de petróleo pode provocar problemas de segurança e ambientais. Novas pastas de cimento podem evitar esses problemas. Neste trabalho, novas pastas de cimento foram pre-paradas na presença de água do mar com resina epóxi-etilenodiamina formada in situ. As novas pastas foram testadas em relação às suas propriedades mecânicas e caracterizadas por FTIR, DRX, TG / DTG, porosime-tria por adsorção-dessorção de N2e RMN de 29Si e de 27Al no estado sólido. Algumas características cinéticas do longo tempo de contato das pastas com o mud acidgerado in situforam realizadas para avaliar o desempenho das novas pastas nos procedimentos rotineiros de acidificação na indústria de poços de petróleo. Os dados cinéticos experimentais foram bem ajustados ao modelo cinético exponencial de ordem variável e ao planejamento fatorial de quatro variáveis (24). Nesses estudos, foi possível avaliar detalhadamente como al-guns fatores experimentais importantes atuam sobre asquantidades de ácido que interagem com as pastas, bem como verificar como esses fatores afetam a velocidade com a qual o mud acidinterage com as pastas. Os resultados sugerem fortemente que as interações ocorridas nas interfaces da pasta de cimento epoxi/ eti-lenodiamina / mud acid são devidas a reações de superfície com preservação das estruturas químicas das pas-tas de cimento, mesmo após contato prolongado com mud acid. A nova pasta de cimento apresenta boas características para ser usada em procedimentos nos poços de petróleo.
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hal-02541254 , version 1 (13-04-2020)

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Danilo Oliveira Santos, Ivory Marcos Gomes Dos Santos, Joenesson Filip Santos Ribeiro, Eunice Fragoso Silva Vieira, Gwenn Le Saout, et al.. The influence of low amounts on in situ-polymerized bisphenol-diamine net in cement slurries prepared in seawater – structural analysis after long-term contact with in situ-generated mud-acid fracturing fluid. Revista Matéria, 2020, 25 (1), ⟨10.1590/s1517-707620200001.0925⟩. ⟨hal-02541254⟩
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