The unique devonian sections of Dniepro-Donetsk cavity. Kolaidyntsy parametric well 413. Article 2

Abstract

The article presents the results of comprehensive study materials drilling 413. When the actual depth of 5 104 m, it revealed the Anthropogenic, Quaternary, Neogene, Paleogene, Cretaceous, Jurassic, Triassic, Permian, Carbon and Devonian deposits which have a thickness of more than 3 600 m. The deposits of the Devonian attributed to Zadonsk-Yеlets (between salt). For stratigraphic and lithological features of this thickness in the Dnieper-Donets Basin is binary structure, which corresponds to two cycles of sedimentation. The lower part is represented by clay-carbonate rocks top – terrigenous. A terrigenous stratum in the north-western part of the basin is 800 m and increases to the southeast in the southern zone edge to 2 076 m in Peter’s well 1. Well 413 revealed only the upper strata of terrigenous capacity of over 3 600 m, so it is a unique cut. The porosity of the sand rocks is almost identical species at depths of 3 200–4 900 m, does not exceed 10 %. Wavy character of changes occurs only at a depth of 4 000–5 104 m.

Keywords

• section
• core
• fauna
• devonian
• palynology
• stratigraphy