The results of the study of the chemical composition of drill cuttings of the Bovanenkovskoe oil and gas condensate field on the following indicators are presented: calcium, magnesium, chloride-sulfate and phosphate ions, total amount of heavy metals and their mobile forms, amount of oil products, chemical consumption of oxygen in aqueous extract. Drill sludges hazard class is defined, also data on biotesting of soil samples derived from the brown sludge of the Bovanenkovskoe oil and gas condensate field with the addition of crushed silica clay, peat grass-roots sieved and calcined diatomite of  Iznenskoe field is presented.