Fifty crude oils from reservoirs ranging in age from Cambrian to late Permian and distributed widely over the Permian Basin were geochemically characterized to assess their stratigraphic interrelationships and provenance. Detailed characterization using stable carbon isotopic composition and biomarker characteristics recognized five genetic groups. Genetic group I oils originate from a type II kerogen, Ordovician marine shale (Simpson Group) source rock deposited under anoxic conditions. Genetic group II oils, believed to be sourced from two kitchens, originate from type II/III kerogen Devonian marine shale (Woodford Shale) source rock deposited under anoxic to suboxic environments. Genetic group III oils are similar in many respects to group II oils. This group, however, shows evidence of significant terrigenous organic matter input. Genetic group III oils, single kitchen–derived oils, are inferred to be sourced from the Mississippian shale (Barnett Shale). Oils of genetic group IV are sourced from two kitchens and generated from the Cisuralian Wolfcamp shale source rock having type II/III kerogen deposited under anoxic–suboxic environments. Group V oils are derived from carbonate-rich shales (marls) of the Cisuralian Bone Spring Formation, having type II kerogen deposited under extremely anoxic environments.With the exception of Devonian- and Mississippian-sourced oils, which occur across a large stratigraphic interval (Cambrian–Ordovician to Permian), the rest of the genetic oil groups occur in close proximity to their candidate source rocks. Although no source rock samples were used in this study, the detailed geochemical study of oils has provided an understanding of the stratigraphic relationships between oils and their inferred source rocks.

中文翻译：

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二叠纪盆地，德克萨斯州西部和新墨西哥州东南部原油的地球化学特征和分类

地球化学特征表征了来自寒武纪至二叠纪晚期，广泛分布于二叠纪盆地的五十种原油的地球化学特征，以评估其地层间的相互关系和物源。使用稳定的碳同位素组成和生物标志物特征进行的详细表征识别了五个遗传组。遗传I类油来自II型干酪根，奥陶纪海相页岩（辛普森集团），在缺氧条件下沉积。据认为，第二类遗传油来自两个厨房，它们来自II / III型干酪根泥盆纪海相页岩（伍德福德页岩）源岩，该岩层是在缺氧至亚缺氧环境下沉积的。遗传III类油在许多方面与II类油相似。但是，该组显示出大量陆源有机质输入的证据。推断第三类遗传油（一种来自厨房的油）来自密西西比页岩（巴尼特页岩）。第四类遗传油来自两个厨房，来自Cisuralian Wolfcamp页岩烃源岩，其具有在缺氧-缺氧环境下沉积的II / III型干酪根。V组油是从Cisuralian骨春季组富含碳酸盐的页岩（泥灰岩）中提取的，在极端缺氧的环境中沉积了II型干酪根，但泥盆纪和密西西比州的油除外，它们的地层间隔很大（寒武纪-奥陶纪至二叠纪），其余的遗传油群则发生在其候选烃源岩附近。尽管在这项研究中未使用任何烃源岩样品，