الفهرس 
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Abstract
It is necessary to determine the maximum pressure that the formation can withstand during well control operation. This value can be calculated using several variables, including kick tolerance. This study aims to analyze a real well control event and investigate the effect of gas dispersion in drilling fluid on pressures at the casing shoe during the use of the conventional driller’s well control method and dynamic well control Modeling software. The calculation of kick tolerance is based on the single-phase and multiphase dispersed kick (gas) model. The initial results show that the type of drilling fluid plays an important role in the calculation of the kick tolerance. After reviewing the results of the multiphase kick tolerance simulation, it was found that the maximum gas kick volume is almost triple that of using a single-phase model in an oil-base mud, allowing safe well control operations, reducing the possibility of accidents, and applying 37% of cost reduction.