The article describes the implementation of experimental research and tests of polymer compositions with drilling fluids under laboratory conditions in order to improve the efficiency of drilling fluid absorption complications and taking into account the permeability characteristics classification analysis of rocks field. The main purpose of this test is to create non-permeable screen or reduce the rock permeability significantly in the areas where mud absorption is observed to reduce mud losses. Key methodology used during the researches and tests were homogeneous model of the formation line composed of flanges welded from both side made from the steel, and at the same time valves allowing connecting the line were built. Modelling the water injection process was the main driver to select adequate length (1 m) of the formation. Quartz sand milled during experiments was taken as porous medium model. All lab tests were performed in isometric environment. Based on the results achieved during experimental research, the dependence of remaining resistance factor on polymer composition concentration and permeability coefficient was built. The depen­dence was achieved of the required polymer composition concentration providing high value of remaining resistance factor from absorber layer permeability allowing finding concentration. This result will signifi­cantly improve drilling fluid properties and characteristics in order to avoid mud losses in difficult areas of drilled reservoir.