DeVelopment of technology for disposal waste drilling fluids, drilling sludges and oil-contaminated soils using biological products
In the article highlighted the issues of generation, utilization and disposal of drilling waste. Established values of drilling waste generation in Perm region. Analyzed process of drilling. Described drilling fluids as aggregation-stable colloidal systems, with a diverse composition and properties. Found that the desired properties of drilling fluids provided by adding in them various chemical reagents, including hazardous for environment. Studied the ways of waste generation, it properties, typical morphological and chemical composition. According to the literature, has been found possibility of high content in drilling wastes such dangerous contaminants like oil products, heavy metals in fixed and mobile forms, chlorides. Established that drilling wastes are toxic and potentially harmful to humans and environment, and they are 3 or/and 4 hazard class. Analyzed possible ways of utilization of drilling waste. Presented the results of experimental researches for determination physico-chemical characteristics (oil content, dry residue, pH, chloride ions, calcium and magnesium ions) of waste drilling fluids, drilling sludges and oil-contaminated soils formed in the Perm region. Described experiments for coagulation of waste drilling fluids, detoxication of drilling sludges and oil-contaminated soils. By results of experiments, will be drawn conclusions about the effectiveness of the combined methods of recycling. Based on the analysis of generation data, the content of pollutants, processing methods, shown the general flow chart of the processing of drilling waste.