Abstract

Oils from Nizhne-Karmal (Tatarstan, Russia) and Boca de Jaruco (Cuba) reservoirs had been researched by GC-MS. Distributions of alkanes, steranes, hopanes, alkylbenzenes had been used as biomarker characteristics. Initial organic substances of both samples had been formed in sea conditions, what had proved by ratio of pristine to phytane. Lack of steranes in Cuban oil evidence about vertical migration or biodegradation processes. Anaerobic microbiological degradation had caused the absence or partial destruction of saturated hydrocarbons. The maturity of raw materials had been estimated by the ratio Ts/(Ts + Tm). Low value Aryl Isoprenoid Index (AIR) showed stability of photic zone for Nizhne-Karmal oil. Photic zone in Cuban reservoir was subjected to the mixing water column.

摘要

GC-MS 研究了来自 Nizhne-Karmal（俄罗斯鞑靼斯坦）和 Boca de Jaruco（古巴）油藏的石油。烷烃、甾烷、藿烷、烷基苯的分布已被用作生物标志物特征。两个样品的初始有机物质都是在海况下形成的，原始与植烷的比例证明了这一点。古巴石油中缺乏关于垂直迁移或生物降解过程的甾烷的证据。厌氧微生物降解导致饱和烃的缺失或部分破坏。原材料的成熟度已通过比率 Ts/(Ts + Tm) 估计。低值芳基异戊二烯指数 (AIR) 表明 Nizhne-Karmal 油光区的稳定性。古巴水库透光带受到混合水柱的影响。