Polímeros: Ciência e Tecnologia
https://app.periodikos.com.br/journal/polimeros/article/doi/10.1590/0104-1428.20250094
Polímeros: Ciência e Tecnologia
Review Article

Polymer-based fluids for well workover: a comprehensive review

Mário César de Siqueira Lima; Victoria Bezerra Romualdo; Waleska Rodrigues Pontes da Costa; Ruth Luna do Nascimento Gonçalves; Anna Carolina Amorim Costa; Laura Rafaela Cavalcanti de Oliveira; Karine Castro Nóbrega; Mirele Costa da Silva Farias; Renalle Cristina Alves de Medeiros Nascimento; Luciana Viana Amorim

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Abstract

Polymeric fluids are widely applied in workover operations because of their ability to control well pressure, regulate filtrate loss, and preserve reservoir productivity. However, their performance is highly dependent on polymer stability, since degradation under thermal, mechanical, or chemical stresses can compromise rheology, weaken filtration control, and increase the risk of formation damage. Research since the 1970s has advanced toward developing improved formulations, aiming to enhance efficiency while reducing reservoir impairment. Laboratory characterization techniques have been essential in evaluating polymer degradation and fluid–rock interactions, generating insights for polymer selection and fluid design. Within this context, this study proposes a literature review on polymeric fluids in workover operations, with emphasis on the role of polymers in fluid formulation and performance. The review also addresses operational fundamentals and technical challenges, focusing on thermal stability, degradation mechanisms, and strategies to minimize formation damage through adequate formulation and characterization approaches.

 

 

Keywords

polymeric fluids, well intervention, thermal stability, performance

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96 Rahmati, M., Khosravi, M., Tanha, A. A., & Rafiq Albajalan, A. (2024). Evaluation of formation damage and filter cake removal with a new LPM drilling fluid additive. Results in Engineering, 23, 102656. https://doi.org/10.1016/j.rineng.2024.102656.
 

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