Problem Solving of Hole Enlargement in Shale Formation Using XRD and CEC Analysis Approach: A Case Study of Well HES-003 in the North West Java Region, Indonesia

Hole enlargement in shale formations poses significant challenges in the drilling industry, particularly in maintaining wellbore stability and preventing operational delays. This study focuses on addressing these challenges through the application of X-ray diffraction (XRD) and Cation Exchange Capacity (CEC) analysis in well HES-003, located in the North West Java region of Indonesia. By employing XRD and CEC analysis, we aim to identify the mineralogical composition of the shale and understand its impact on hole enlargement. The study reveals that certain clay minerals within the shale are prone to swelling and dispersion when exposed to drilling fluids, leading to hole instability. By correlating mineralogical data with drilling performance, we develop a targeted approach to mitigate hole enlargement. The findings underscore the importance of tailoring drilling fluid compositions to the specific mineralogy of the formation, ultimately enhancing wellbore stability and reducing non-productive time. This case study demonstrates the effectiveness of XRD and CEC analysis in diagnosing and solving drilling problems in shale formations, providing a valuable reference for future drilling operations in similar geological settings.