Eco-Friendly Drilling: Evaluating the Impact of Engineered High-Performance Water-Based Mud on Emissions and Waste

Abstract The oil and gas industry are under increasing pressure to minimize its environmental footprint, with drilling fluids being a significant contributor to operational emissions and waste. Traditional Oil-Based Muds (OBMs), despite their effectiveness in drilling operations, pose substantial environmental risks due to their disposal challenges and high carbon footprint. In response, High-Performance Water-Based Muds (HPWBMs) have been developed, promising reduced environmental impact and improved performance. This study aims to evaluate the efficacy of HPWBMs in reducing emissions and waste while maintaining operational efficiency and cost-effectiveness. The primary objective of this research is to compare the environmental and economic impacts of HPWBMs and OBMs through comprehensive field trials and laboratory tests. By analyzing drilling performance, cost-per-lateral-foot, waste management, and emissions, this study seeks to establish HPWBM as a viable and sustainable alternative to OBMs in the oil and gas industry. Field trials were conducted in North Central Texas and the Permian Basin, involving the drilling of 26 wells—13 using HPWBM and 13 using OBM. The North Central Texas case study focused on an operator's challenge of drilling 10,000-15,000’ lateral wells at TVDs of 3,800-4,800’. In the Permian Basin, Wolfcamp horizontal wells were drilled to evaluate performance. Key performance indicators (KPIs) such as drilling fluid cost, lateral cost per foot, and days per well were measured. Emissions were calculated using a carbon calculator, and laboratory tests assessed rheological properties, lubricity, and thermal stability. The results indicated that HPWBM systems not only reduced drilling costs by 18.2% but also significantly lowered CO2 emissions and hazardous waste generation. In the North Central Texas case study, the use of HPWBM resulted in cost savings of over $100,000 per well, with significant reductions in disposal costs, OBM logistics, base-fluid costs, motor realignment fees, and pit cleaning expenses. The environmental footprint and carbon emissions were notably reduced, with CO2 emissions for HPWBM wells averaging 386.1 metric tons compared to 710 metric tons for OBM wells. In the Permian Basin, the average fluids cost per foot for HPWBM wells was $6.02 compared to $7.04 for OBM wells, and the average number of lateral days was reduced to 4.92 days compared to 11.50 days for OBM wells. This study presents a comprehensive evaluation of HPWBMs, demonstrating their superior environmental and economic performance over traditional OBMs. The significant reduction in CO2 emissions and hazardous waste, combined with cost savings and improved operational efficiency, highlights the potential of HPWBMs to transform drilling practices in the oil and gas industry. The findings support the broader adoption of HPWBMs, promoting sustainable and cost-effective drilling operations that align with global sustainability goals.