Invasion zone modeling using water- and oil-based muds

The hydrodynamic processes of displacement of reservoir fluids in an oil-saturated reservoir in vertical well drilling are studied by numerical simulation accounting for the drilling conditions and the type of mud (water-clay or oil-based). The influence of the hydrodynamic characteristics of the invasion zone on the specific electrical resistance depending on the type of mud is studied. The results of numerical simulations for the interpretation of high-frequency electromagnetic logs were used to construct geoelectric and hydrodynamic models in the reservoirs with different fluid saturations.