Material and dispersing composition of impurities in oil fields' waste wate
rs has been studied. Organic composition of suspened matter determines its
low density and low settlement velocity. Diameter of oil particles during e
xperiments was far less, than diameter, taken for engineering evaluation of
treatment facilities. Coagulation and flocculation have been tried. For oi
l fields' waste waters treatment chemical agent SNPH-4502 with permanent pr
oportion of 20 mg/l is recommended.