Abstract
Зоны коры выветривания архей-нижнепротерозойского основания Южно-Татарского свода и особенности их площадного развития
Highlights
The productivity of the weathering crust, both ancient and young platforms, has been proved in many oil and gas basins of the world, including the West Siberian, the South Mangyshlak (Oymasha), the northern side of the Dnieper-Donetsk avlakogen (Yuliyevsky, Khukhrinsky, and others)
The surface of the basement, its weathering crust has been exposed in the sections of the wells, in the vertical profile of which, from below upwards the following zones are identified: Zone “B” is the zone of initial disintegration, which corresponds to the first stage of rock discontinuity
Using the revealed logging characteristics of the weathering crust zones, we studied materials on 750 deep wells drilled in the territory of the South-Tatar Arch, confined by the Serafimovsko-Baltaevsky graben from the south; in 340 of them, the weathering crust was identified
Summary
The productivity of the weathering crust, both ancient and young platforms, has been proved in many oil and gas basins of the world, including the West Siberian (fields of Shaimsky swell and Krasnoleninsky arch), the South Mangyshlak (Oymasha), the northern side of the Dnieper-Donetsk avlakogen (Yuliyevsky, Khukhrinsky, and others). Based on the comparison of the core material and logging data, a vertical profile of the weathering crust of the South-Tatar arch basement was constructed, in which the zones of successive changes in crystalline rocks under the influence of hypergenic factors from the initial disintegration of the original substrate to the final products of its decomposition are traced from below and their logging characteristics are outlined.
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