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<p>Plastic waste accumulation poses mounting environmental threats globally. Upcycling these materials into valuable nanomaterials, like graphene nanosheets (GNs), provides a promising sustainability solution. This study synthesized GNs from plastic waste and evaluated their efficacy as drilling fluid additives. Various analytical techniques characterized the produced GNs. Experiments examined the impact of 0.05–0.44&#xa0;wt% GN concentrations on the rheology and filtration performance of a water-based potassium chloride/polymer drilling fluid before and after hot rolling at 150&#xa0;°C for 16h. Results showed improved rheological parameters (viscosity, gel strength, yield point) at all GN concentrations, especially 0.44&#xa0;wt%, indicating enhanced cuttings lifting and hole-cleaning capacity. GNs also provided superior thermal stability with minimal property degradation after hot rolling. Most significantly, GNs delivered exceptional filtration control, with up to 70% reduction in API filtration losses and a 55% decrease in high-temperature filtration losses with ultrathin filter cakes. Therefore, plastic-derived GNs could be highly effective, eco-friendly drilling fluid additives, able to strengthen mud properties, and filtration control at very low concentrations under high temperatures. This novel application creates value from plastic waste while improving drilling fluids for high-temperature wells.</p>

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Valorization of Plastic Waste-Derived Graphene Nanosheets: A Sustainable Approach for Enhancing Drilling Fluid Performance in High-Temperature Wells

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Anirudh Bardhan,
  • Himanshu Kesarwani,
  • Shivanjali Sharma,
  • Amit Saxena,
  • Chetna Tewari,
  • Prithu Mukhopadhyay,
  • Shailesh Kumar

摘要

Plastic waste accumulation poses mounting environmental threats globally. Upcycling these materials into valuable nanomaterials, like graphene nanosheets (GNs), provides a promising sustainability solution. This study synthesized GNs from plastic waste and evaluated their efficacy as drilling fluid additives. Various analytical techniques characterized the produced GNs. Experiments examined the impact of 0.05–0.44 wt% GN concentrations on the rheology and filtration performance of a water-based potassium chloride/polymer drilling fluid before and after hot rolling at 150 °C for 16h. Results showed improved rheological parameters (viscosity, gel strength, yield point) at all GN concentrations, especially 0.44 wt%, indicating enhanced cuttings lifting and hole-cleaning capacity. GNs also provided superior thermal stability with minimal property degradation after hot rolling. Most significantly, GNs delivered exceptional filtration control, with up to 70% reduction in API filtration losses and a 55% decrease in high-temperature filtration losses with ultrathin filter cakes. Therefore, plastic-derived GNs could be highly effective, eco-friendly drilling fluid additives, able to strengthen mud properties, and filtration control at very low concentrations under high temperatures. This novel application creates value from plastic waste while improving drilling fluids for high-temperature wells.