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地质体中(沉积物和原油)存在着大量的甾烷和五环三萜烷(萜类)等生物标记化合物。由于这些化合物在成岩过程中具有相对的稳定性,因此根据其各成岩阶段所反映的演化特征,将为我们探讨生油岩的母质类型、成熟度、原油对比和油气运移途径等提供了可靠的信息。本文主要根据m/e217甾烷、m/e191藿烷所反映的特征,对松辽盆地南部白垩系下统青山口组生油岩和高台子、扶余油层原油的类型、成熟度以及油气运移等进行研究,现简述如下。
There are a large number of biomarkers such as steranes and pentacyclic triterpenes (terpenoids) in geological bodies (sediments and crude oil). Due to the relative stability of these compounds in diagenesis, the evolutionary characteristics of these diagenetic stages will provide a reliable basis for our discussion of parent types, maturity, crude oil contrast and hydrocarbon migration pathways of source rocks Information. Based on the characteristics of m / e217 sterane and m / e191 hopane, the types, maturities and hydrocarbon migration of the Cretaceous Qingshankou Formation source rocks and the Gaotaizi and Fuyu reservoirs in the southern Songliao Basin, Research, etc., are summarized below.