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以下辽河西部凹陷原油为例，探讨了１８ａ（Ｈ）－新藿烷及１７ａ（Ｈ）－重排藿烷类化合物的地球化学属性与应用意义．新藿烷及重排藿烷类化合物相对丰度可用作判识原油成熟度的有效指标，但需以源岩沉积－有机相相近为前提，其有效应用范围为成熟～高成熟阶段．新藿烷及重排藿烷参数同时具有成熟度和沉积－有机相双重地球化学属性，故可作为油源对比和原油族群划分的有效参数．沉积介质条件和粘土矿物对重排藿烷类前身物的形成和原始丰度具有重要控制作用．原油中检出一新系列化合物，初步研究认为其可能为另一重排藿烷型系列化合物，其分布特征和地球化学属性与１７ａ（Ｈ）－重排藿烷系列相近．
Taking the following crude oil in western Liaohe depression as an example, the geochemical properties and application significance of 18a (H) - neoganene and 17a (H) - rearranged hopane compounds are discussed. The relative abundance of neo-hopane and rearranged hopane compounds can be used as an effective index to judge the maturity of crude oil. However, the effective application range of sedimentary-organic phase of source rock is from mature to high maturity stage. The new hopane and rearranged hopane parameters have both maturity and sedimentary-organic dual geochemical properties, so they can be used as effective parameters for oil source contrast and crude oil grouping. Sedimentary media conditions and clay minerals play an important role in controlling the formation and original abundance of rearranged hopane precursors. A new series of compounds was detected in crude oil, and preliminary studies suggest that it may be another rearranged hopane series compound with similar distribution and geochemical properties as the 17a (H) - rearranged hopane series.