Twenty-four subsurface samples from the Lower Eocene Thebes Formation in the north Gulf of Suez underwent organic geochemical and petrographic analyses. The aim is to evaluate the hydrocarbon source rock potential and understand the organic facies composition of this pre-rift formation, which received little attention. The Thebes Formation is a potential hydrocarbon source rock in the area of the GS 24–1 well with an average TOC of 1.52 wt% (range 0.51–4.23 wt%). The organic geochemical (HI/OI and Pr/Ph vs Pr/n-C₁₇) and petrographic analyses revealed that the organic matter of this conventionally known marine source rock is made up of both marine and terrestrial sources in the Abu Darag sub-basin. The predominant kerogen type II is comprised mainly of liptinitic (dinoflagellate cysts and amorphous organic matter: AOM) and subordinate vitrinitic macerals, which produced mixed cyclo and normal alkanes and some aromatics when subjected to pyrochromatography. The average Tmax value of 428 °C and UV fluorescence of the palynomorphs and AOM indicate that the organic matter has entered the early oil-window stage. The tectonostratigraphic evolution of the Abu Darag sub-basin affected the Thebes Formation source rock quality. More exploration activities across this sub-basin are needed to fully explore the organic facies composition and hydrocarbon potential of the Thebes Formation.

来自苏伊士湾北部始新世底比斯组的 24 个地下样品进行了有机地球化学和岩石学分析。目的是评价烃源岩潜力并了解该裂谷前地层的有机相组成，这很少受到关注。Thebes 组是 GS 24-1 井地区潜在的烃源岩，平均 TOC 为 1.52 wt%（范围为 0.51-4.23 wt%）。有机地球化学（HI/OI 和 Pr/Ph vs Pr/nC ₁₇) 和岩石学分析表明，这种传统上已知的海相烃源岩的有机质由阿布达拉格子盆地的海相和陆相来源组成。主要的干酪根类型 II 主要由脂质（甲藻囊肿和无定形有机物：AOM）和次要的玻璃质微晶组成，在进行热色谱时产生混合的环烷烃和正构烷烃以及一些芳烃。428 ℃的平均Tmax值和孢粉体和AOM的紫外荧光表明有机质已进入早期油窗阶段。Abu Darag 次盆地构造地层演化影响了底比斯组烃源岩质量。