Optimisation of Drilling Parameters Using D-Exponent Analysis for Early Detection of Abnormal Formation Pressure

Abstract

The early detection of abnormal formation pressures during drilling operations is critical to ensuring wellbore stability, preventing blowouts, and enhancing operational efficiency. This study explores the optimisation of drilling parameters by applying D-exponent analysis, a widely recognized formation pressure evaluation technique that integrates penetration rate and rotary speed with formation characteristics. Using field data from selected wells, the research investigates the effectiveness of the corrected D-exponent in identifying pressure anomalies by incorporating mud weight adjustments and lithological influences. Analytical results indicate a strong correlation between deviations in the D-exponent trend and abnormal pressure zones, providing valuable insights for real-time decision-making. Additionally, the study proposes guidelines for optimising drilling parameters, such as weight on bit and rotary speed, to improve formation pressure detection accuracy. The findings underscore the importance of integrating D-exponent analysis into routine drilling monitoring systems as a proactive measure for enhancing drilling safety and efficiency in complex geological environments.