Leveraging LWD-Driven Real-Time Geomechanics for Safe Drilling Operations in a Complex Wildcat Well

Abstract This paper explores the application of real-time geomechanics through logging-while-drilling (LWD) tools—gamma ray, resistivity, and sonic—in an exploratory wildcat well drilled under extreme conditions. The primary objective was to manage mud density effectively to ensure safe drilling practices in the 12¼-in. and 6-in. hole sections, preventing major losses and controlling well flow amidst the challenges posed by the harsh environment. Real-time LWD monitoring enabled continuous mud-weight and flow-rate adjustments, ensuring stable conditions during drilling. In the 6-in. section, maintaining a critical balance between static mud density (19.1 ppg) and circulating mud density (20.6 ppg) was essential to mitigate risks such as high gas influxes, losses, and stuck-pipe events. The real-time data provided by the LWD tools enabled the drilling team to make timely and informed adjustments, ensuring wellbore stability and preventing potential hazards in this high-risk exploratory environment. The implementation of real-time geomechanics was crucial in successfully drilling the wildcat well under challenging environment, minimizing issues such as drilling fluid exposure, mud invasion, and borehole enlargement. While enlargement was limited during drilling, subsequent wireline logs indicated significant borehole enlargement, exceeding 10 in., underscoring the importance of obtaining real-time data during drilling. The LWD data was integral to formation evaluation and showed strong correlation with mud-logging elemental analysis. Despite encountering high gas levels, loss events, and stuck pipe incidents in the 6-in. section, the well was drilled safely to total depth. The continuous adjustment of mud density and flow rate, driven by real-time LWD data, played a pivotal role in maintaining wellbore stability and averting major losses. This approach not only ensured the successful completion of the well but also established best practices for future wildcat drilling operations under similarly challenging conditions. This work demonstrates how real-time LWD-based geomechanics enabled safe drilling through unpredictable pressure regimes in a frontier wildcat well. The approach minimizes instability, optimizes mud-weight decisions, and provides a workflow applicable to future high-risk exploration wells.