Reducing Mud Loss in Drilling Operations with High-Performance Plugging Agent

Abstract This study aims to evaluate the efficacy of a new high filtration loss consolidation plugging agent in addressing the persistent challenges associated with fluid loss. By conducting comprehensive laboratory experiments and field trials, the aim is to precisely quantify the agent's ability to mitigate fluid loss and enhance wellbore stability. The overarching goal is to provide actionable insights that empower drilling engineers and operators to make informed decisions, leading to improved drilling performance and cost-effectiveness. A methodical approach was employed to assess the high filtration loss consolidation plugging agent's performance. Laboratory experiments simulated downhole conditions by varying temperature, pressure, and salinity, while field trials across diverse drilling sites validated its effectiveness. The agent was applied alongside oil-based drilling fluids, with continuous monitoring of wellbore stability and fluid properties. Advanced analytical techniques, including fluid loss measurements and core sample evaluations, quantified its efficacy. Data analysis guided the optimization of drilling practices. The plugging agent's versatility was demonstrated through its ability to adjust slurry density within the range of 1.0 g/cm3 to 2.2 g/cm3, ensuring applicability across diverse density segments encountered in field operations. With a filtration time of under 60 seconds and a robust consolidation strength exceeding 4 MPa, the agent swiftly forms a solid plugging wall within the leakage channel, effectively enhancing plugging efficiency. In conclusion, field trials were successfully conducted in 25 wells, exemplified by the MX019-H5 well, showcased a remarkable 91.9% reduction in leakage rates, while the WBQ020-H1 well successfully achieved pressure plugging without leakage during circulation at 35 L/s, validating its operational effectiveness. By leveraging the unique properties of the high filtration loss consolidation plugging agent, significant advancements have been made in mitigating fluid loss and improving wellbore stability. The economic implications of these improvements are substantial, with potential cost savings attributed to reduced non-productive time and enhanced drilling performance.