Synthesis of Tannin-Lignin as Thermal Resistance Thinning Agent for Water-Based Drilling Mud

Puteri Nor Shahira Haslinda Abdul Rahman; Mohd Asad Mohammad; Nurul Farhah Nadhirah Mohd Ruslan; Norasyikin Ismail; Norida Ridzuan; Nor Hanimah Hamidi

doi:10.4028/p-hElz1Z

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Synthesis of Tannin-Lignin as Thermal Resistance Thinning Agent for Water-Based Drilling Mud
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 1030Synthesis of Tannin-Lignin as Thermal Resistance...

Synthesis of Tannin-Lignin as Thermal Resistance Thinning Agent for Water-Based Drilling Mud

Abstract:

Traditional deflocculants containing chromium in high-temperature and high-pressure (HTHP) wells present health hazards due to chromium toxicity. This study aims to tackle this issue by creating a heat-resistant diluting ingredient for water-based drilling mud (WBM) produced from easily accessible natural resources. The synthesized compound demonstrated exceptional heat resistance by employing an organosolv extraction method using formic acid, followed by cross-linking with tannin. It maintained stability even at a high temperature of 150 °C. Adding the agent to mud formulations significantly resulted in superior rheological properties, as 0.6 w/w % agent ratios led to greater thinning and control of viscosity. The study found that increasing tannin-lignin content effectively reduced plastic viscosity at higher temperatures, mitigating viscosity buildup. Apparent viscosity was highest at 0.2 w/w % tannin-lignin but decreased with rising temperatures, improving mud circulation for deep-well applications. While tannin-lignin from oil palm biomass fiber exhibited the highest yield point at 100 °C, the yield points generally declined at 150 °C, reaching a moderate value beneficial for hole cleaning. A slight pH reduction with temperature-affected rheology, with an optimal pH range (8.0–10.5), is required for effective WBM performance. This environmentally conscious solution has a considerably diminished ecological impact compared to chrome-based alternatives, promoting safer and more sustainable drilling methods. It enhances resource efficiency by harnessing biomass resources, reduces the use of hazardous chemicals, and facilitates safer operations due to its non-toxic composition. Later research may concentrate on enhancing the utilization of agents and investigating alternate biomass sources to achieve broader applicability. This sustainable thinning agent represents a possible alternative for HTHP WBM applications, facilitating a more environmentally friendly and safer future in the drilling sector.