The growing number of depleted reservoirs around the world and the increasing necessity to recover hydrocarbons more efficiently has been forcing the oil and gas industry to continuously improve its drilling technology. ‎ Due to vast application of overbalanced drilling (OBD) and the facilities that are more accessible logistically, the benefits that Underbalanced drilling (UBD) can bring for the reservoir production are often ignored. Especially when it comes to high pressure reservoir, more often drillers are prone to use OBD than UBD due to less cost and challenges. A reliable MEM as an indicator of Wellbore ability to withstand mechanical problems in either high pressure or normal pressure reservoir, can be used to investigate UBD feasibility study.