Abstract

Geochemical parameters of the Cenozoic shale strata of the western Ciscaucasia have been analyzed. Oil source strata were identified in the study. The geochemical characteristics of organic matter (OM) of the Kumian rocks revealed high oil source potential of the rocks. The formation and emigration of hydrocarbons (HCs) were inferred from qualitative and quantitative changes. Sapropelic OM generated large amounts of hydrocarbons in the Kuma Sequence, with the value increasing from the top to the bottom of the profile. Para-autochthonous and migratory bitumoids were registered on the PC3 gradation and well-developed on the MK2 gradation (at a depth of 4.6–5.0 km). A comprehensive study of OM from Khadumian rocks by pyrolysis, bituminology, and chromatography showed that all kerogen types were developed in the rocks, but mixed OM with moderate oil source potential predominated. Maximal organic carbon (C_org) concentrations and genetic potential were observed within the Western Kuban trough, as well as in the strip of outcrops in the Adygei ledge area. The improvement in geochemical parameters in these areas is due to a decrease in the terrigenous component in the crude OM in the same direction.

中文翻译：

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西西高加索地区新生代页岩床的地球化学研究

摘要

分析了西高加索西部新生代页岩层的地球化学参数。该研究确定了油源地层。库米期岩石的有机物地球化学特征表明其岩石具有很高的油源潜力。从质和量的变化推断出碳氢化合物（HCs）的形成和迁移。腐烂的OM在Kuma序列中生成了大量的烃，其值从剖面的顶部到底部逐渐增加。准自生和迁徙的类比虫在PC3等级上登记，并在MK2等级上（在4.6-5.0 km的深度）发育良好。通过热解，沥青学和色谱法对卡杜姆岩中的OM进行了综合研究，结果表明，所有干酪根类型均在岩石中发育，但以中等油源潜力的混合OM为主。最大有机碳（C在西库班海槽内以及在阿迪格（Adygei）壁架地区的露头带中观察到_org）的浓度和遗传潜力。这些地区的地球化学参数的改善是由于原油OM中相同方向的陆源成分减少。