Oil seep samples from the Foothill Zone of northern Iraq were geochemically characterized to determine the level of biodegradation and water washing of the seeps and to determine the depositional environment (including sedimentary facies, oxicity, and organic matter type) of correlative source rocks. Eight samples from three seeps sites (Hammam Al-Alil, Qaiyarah, and Fat'ha) were investigated. Detailed saturated and aromatic biomarkers were analyzed using GC-FID and GC-MS, in addition to measurement of carbon isotopes and the sulphur content. Qaiyarah samples range from non-biodegraded to moderately biodegraded; whereas Hammam Al-Alil and Fat'ha samples are moderately biodegraded. The Hammam Al-Alil and Fat'ha samples are also affected by water washing. Biomarker, carbon isotope, and sulphur data suggest that these oil seeps contain oil expelled during the early oil window from carbonate source rocks of Jurassic age. Correlative source rocks were deposited in an anoxic marine environment. The most likely source rock candidates include the Sargelu, Naoklekan, and Chia Gara formations.

对伊拉克北部山麓地带的石油渗漏样品进行了地球化学表征，以确定渗滤液的生物降解程度和水洗程度，并确定相关烃源岩的沉积环境（包括沉积相，含氧量和有机质类型）。调查了三个渗水点（哈马姆·艾利，哈萨克斯坦和法塔赫）的八个样本。除了测量碳同位素和硫含量外，还使用GC-FID和GC-MS分析了详细的饱和和芳香族生物标志物。Qaiyarah样品的范围从非生物降解到中度生物降解。而Hammam Al-Alil和Fat'ha样品则进行了中等程度的生物降解。Hammam Al-Alil和Fat'ha样品也受到水洗的影响。生物标志物，碳同位素，硫的数据表明，这些油渗漏物包含在侏罗纪时期碳酸盐岩源岩早期油窗中排出的油。相关的烃源岩沉积在缺氧的海洋环境中。最有可能的候选烃源包括Sargelu，Naoklekan和Chia Gara地层。