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The Tempino Field, located within the Jambi Sub-basin of the South Sumatra Basin, has been undergoing a comprehensive geomechanical study to assess drilling risks and wellbore stability. This study, which represents the third phase of an ongoing investigation, aimed to develop and validate 1D and 3D geomechanical models to enhance the understanding of subsurface stress and pressure distribution.

The methodology involved the collection of an extensive dataset from multiple wells, including Gamma Ray, Sonic, and Density logs, rock tests, as well as additional data from key wells that penetrated the Air Benakat and Gumai formations. These data were utilized to construct detailed 1D geomechanical models for individual wells and a 3D mechanical earth model to visualize stress and pressure variations across the Tempino Field. The 1D geomechanical models results indicated significant wellbore stability challenges, including collapse pressures and pore pressure anomalies. In particular, time-dependent wellbore instabilities, such as caving present while tripping, were identified in several wells, correlating with regions of high stress concentration. The 3D geomechanical model provided a comprehensive view of the field, revealing that some zones within the Tempino Field exhibit depleted pressure conditions and significant stress anisotropy. Validation of the 1D and 3D models against actual field data confirmed the accuracy of the predicted geomechanical parameters.

In conclusion, the study identified critical geomechanical hazards in the Tempino Field, emphasizing the need for careful planning and execution of drilling operations to mitigate these risks. The validated models serve as essential tools for optimizing wellbore stability and ensuring safe drilling practices in this complex geological setting.