Abstract

On the basis of integrated paleobotanic, lithogeochemical, IR-spectrometric, and thermochemical studies, stratigraphic subdivision and correlation of productive Middle–Upper Jurassic sediments represented by the Tyumen and Naunak formations in the Dvoinaya and Snezhnaya areas (southeastern part of West Siberia, central Tomsk oblast) are carried out. A reliable basis is created for an optimal correction of reserves calculation and effective development of hydrocarbon deposits. It is found that the index species among paleobotanic remains of the Tyumen Formation are the ferns Coniopteris vialovae and Raphaelia diamensis and Czekanowskiales Czekanowskia irkutensis, Cz. rigida, and Phoenicopsis mogutchevae; for the Naunak Formation, it is Czekanowskia tomskiensis. This is due to the paleoclimatic environment which predetermined the compositions of plant communities and the species of coal-forming plants. For reliable correlation, a lithogeochemical study of sediments is carried out taking into account the analysis of coal origin. The difference in composition of plant complexes in the studied formations is confirmed by the difference in genetic properties of the marking coal-bearing deposits: degree of biochemical stability of the organic mass of the peat, gelification, and floristic restorability of the organic mass in coals, as well as yields of light and heavy hydrocarbons.

中文翻译：

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西西伯利亚东南部中上侏罗统沉积物地层划分和相关性综合方法的发展

摘要

根据综合的古生物，岩理学，红外光谱和热化学研究，以Dvoinaya和Snezhnaya地区（西西伯利亚东南部，托木斯克中部）的秋明州和瑙纳克组为代表的生产性中上侏罗统沉积物的地层划分和相关性oblast）。为优化计算储量和有效开发油气藏奠定了可靠的基础。发现秋明州组的古植物残存中的索引物种是蕨类Coniopteris vialovae和Raphaelia diamensis以及Czekanowskiales Czekanowskia irkutensis，Cz。杜松和Phoenicopsis mogutchevae; 对于瑙纳克组，它是Czekanowskia tomskiensis。这是由于古气候环境预先确定了植物群落的组成和成煤植物的种类。为了进行可靠的关联，对沉积物进行了岩石地球化学研究，并考虑了煤成因的分析。所研究的地层中植物复合物组成的差异已通过标志性含煤沉积物的遗传特性差异得以证实：泥炭有机质的生化稳定性，胶凝作用以及煤中有机质的区系可恢复性以及轻烃和重烃的收率。