The article presents a study of sediments of the Lower Carboniferous Tula horizon, confined to the western slope of the South Tatar crest on the example of Ivinskoye field. Important part of the geological study is the allocation of oil and gas reservoirs, their linking and matching with individual wells, as well as detailed analysis of the nature of the spread of these deposits on the area. The detailed dissection of Tula Lower Carboniferous sediments was made according to geological and geophysical materials. Reservoir beds of Tula horizon were allocated; we helded their correlation, built thickness maps and structure map of the Tula horizon roof. We isolated frame and correlate "Tula limestone". According to drilling and seismic data Visean incision was described. The patterns of development of Tula horizon reservoirs were traced. We revealed vertical and horizontal variability of the earth formation, which suggests a complex lithological and facies conditions at the time. Also we traced the relationship between the horizons in sedimentation strata. The study of patterns of development and analysis of the spread of productive strata of Tula deposits allowed to establish links between sedimentation in the Tula period and spread of Visean incision.
References
1. Muslimov R.Kh., Abdulmazitov R.G., Khisamov R.B. et al., Neftegazonosnost'
Respubliki Tatarstan. Geologiya i razrabotka neftyanykh mestorozhdeniy (Oil
and gas bearing of the Republic of Tatarstan. Geology and development of
oil fields), Part 1, Kazan': FEN Publ., 2007, 316 p.
2. Voytovich E.D, Shel'nova A.K., Effect of pre-Visean erosional incision for
placing the oil in the Lower Carboniferous deposits of Tatarstan (In Russ.), Geologiya
nefti i gaza, 1976, no. 3, pp. 17-22.
3. Danilova T.E., Atlas porod osnovnykh neftenosnykh gorizontov paleozoya
Respubliki Tatarstan. Terrigennye porody devona i nizhnego karbona (Atlas of
rocks of the main oil-bearing horizons of Paleozoic of the Republic of
Tatarstan. Terrigenous rocks of Devonian and Lower Carboniferous), Kazan':
Pluton Publ., 2008, 440 p.
4. Larochkina I.A., Kontseptsiya sistemnogo geologicheskogo analiza pri
poiskakh i razvedke mestorozhdeniy nefti na territorii Tatarstana (Concept of
systematic geological analysis in prospecting and exploration of oil deposits
in Tatarstan), Kazan': FEN Publ., 2013, 232 p.
