Nickel in oil deposits of the Dnipro-Donetsk depression (Ukraine)

The scientific importance of the obtained results is in the development of the natural classification of oil deposits by nickel content, the identification of typomorphic features of the oils of the considered deposits and established that exactly asphaltenes from all oil fractions is main carriers and concentrators of nickel.
The practical importance of the results obtained is in establishing the average concentration and the ability to predict the nickel content in the oils of the studied deposits using the calculated regression equations.