Reservoir basin characterization using one-dimensional (1D) mechanical earth modeling (MEM) for wellbore stability (WBS) analysis

This study employed an extensive wellbore stability (WBS) analysis through the utilization of a one-dimensional (1D) mechanical earth model (MEM). Meticulous scrutiny was conducted on conventional wellbore log data derived from the Digboi oil field in the Upper Assam region within the northern Himalayas, taking into account the inherent anisotropic characteristics. A notable aspect of this investigation contributed in its integration of insights obtained from both static and cyclic assessments conducted on Tipam sandstone. The resulting model synthesized a wide array of factors, including parameters such as density, porosity, fracture systems, pore pressures, stress conditions, and the mechanical properties of rocks. This comprehensive approach assisted in the comprehension of reservoir stress dynamics and instability. A significant contribution of this endeavor pertained to the pioneering synthesis of findings gleaned from cyclic and static evaluations of Tipam sandstone. The culmination of these insights enabled the calibration and validation of the 1D model through rigorous comparisons with results obtained from rock laboratory experiments and log data. This innovative methodology serves to advance understanding of rock properties and behavior within complex subsurface environments.