Open AccessOil strata formation of small oil deposits in the western part of the Tatarstan republic
Author(s) -
Э. А. Королев,
А. А. Ескин,
L V Muzalevskaya,
E R Barieva,
E A Serazeeva
Publication year - 2022
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/990/1/012045
Subject(s) - geology , geochemistry , oil field , petroleum , petroleum engineering , paleontology
Small oil fields in the western part of the Tatarstan Republic, localized within single brachyanticlinal structures, have been studied. The main productive oil deposits are confined to the deposits of the Tournaisian stage. The reservoir rocks are leached lumpy-peloid limestones, grainstones. Oil-saturated limestones are predominantly medium- and high-capacity reservoirs. Within the limits of oil deposits, oils are characterized by a weak oxidation state. Their composition is dominated by the middle fractions of hydrocarbons. Only in the bottom part of oil deposits near the oil-water contact is the prevalence of heavy hydrocarbons. This indicates that the oil deposits are in the early stages of formation water flooding. By analogy with the same small oil fields on the eastern side of the Melekesskaya depression, it can be expected that oil inflows will not exceed 6-8 tons/day.