Composition features of hydrocarbons and rocks of Domanic deposits of different oil fields in the Tatarstan territory

摘要

Study was conducted of rocks composition and its extracted moving hydrocarbons from Domanic deposits of Tatarstan, differing in location and occurrence depth from 1379 to 1891 m. The rocks are represented from carbonate-siliceous to pure carbonates with calcite content from 24 to 99%. With increase in calcite content in rocks, the yield of extracts from them decreases. Within Romashkinskoye field, an increase in yield of bitumoids with increase the occurrence depth of the host rocks - from 0.63 to 2.40% was established. Saturated hydrocarbons content of changes from 18 to 39%, of asphaltenes - from 9 to 26%.