DOI: 10.24412/2076-6785-2022-3-11-15
Abstract
In article the data according to above mention problem are published. The Fammenian carbonate deflections take part of upper Devonian-Tournaisian oil-gas complex among seven oil-gas complexes at platform Bashkortostan. Its deflections are bedding on thin Fran sediments and introduced, by essence, basic deflections of Paleozoic carbonate thick series. Depressions of Kamsko-Kinel System (KKS) and two paleo-shelf (Bashkir and Tatar) define tectonic framework of Fammenian carbonate. Analysis was given on date of three representative oil fields. Most conclusions are following. Dynamic regime of sedimentation had different mechanism into separate zones to KKS depressions. At Western part of contemporary Bashkir arch and contemporary Birsk saddle large barrier reefs and companying local reefs are not productivity. But above its local structures into Terrigenous
Low Carbon (TTLC) contain unique, large, middle and little oil fields. It means that Fammenian plan controlled upper structure plans in territory KKS depressions. In other parts of KKS depression dynamic regime of sedimentation, opportunity into South-Western party of Aktanysh-Chishma Depression, the ring sandstone TTLC formations are formed around local Fammenian-Tournal reef. The new, unknown up to oil fields ТТLC are contains into its. Above mention predication don’t corresponds to Bashkir and Tatar paleo-shelfs as a one’s organic buildings (OB) have minimal volume and amplitude, and tectonic regime corresponded to normal sedimentary. Oil-gas deposits on paleo-shelfs are small.
Further oil-gas perspective will associated with: zones of increase thickness Fammenian carbonates on north-west – particularly in regions of cross Paleozoic sedimentary with foundation steps. Than the perspectives will connection with local regions of “sault tectonic” into Salmuysh
depression and with prognostication zones anomaly low sheet pressure.
Materials and methods
The main emphasis of the work is a geological paradox: at the base of carbonate bodies, which are of enormous size (barrier reefs) and, accordingly, the expected large capacity for the generation and creation of hydrocarbons, there are no signs of a creative “kitchen” for the reactions of hydrocarbon synthesis (or other mechanism of hydrocarbon
origin).
Keywords
fammenian, geological cross section, depression, oil-gas deposit, paleo-shelf
