We discuss the current understanding of the Vendian Regional Stages in the northeast of the Nepa-Botuobiya Anteclise, establish a new correlation of the Vendian sections across different facies, and propose stratotypes for the introduced stratigraphic units. A new stratigraphic chart is constructed for the Vendian terrigenous strata in the northeast of the Nepa-Botuobiya Anteclise and the adjacent territories.
Within the Syugdzher petroleum region, there are the following promising petroleum plays: terrogenous Vendian, carbonaceous Vedian-Lower Cambrian, carbonaceous Lower-Middle Cambrian, and Upper Cambrian-Lower Ordovician. The detailed analysis allowed the authors to appraise the prospects of every play. The most promising is the Botuobinsky horizon in the terrigenous Vendian play. The Talakhsky and Vilyuchansky horizons are characterised by small prospects due to increased thickness gradient, which favoured accumulati on of dirty coarse-grained and poorly sorted sandy rocks. The carbonaceous Vendian-Lower Cambrian play is characterised by poor reservoir properti es and was appraised at a low rate. The authors have established that the main prospects may be connected to the clinoform complex overlying the source Kuonamskaya Formati on in the Middle Cambrian. A breakthrough map of the petroleum prospects of the Syugdzher petroleum region was built with outlining two zones of increased petroleum prospects.
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