松辽盆地农安地区上白垩统油页岩含油率影响因素

农安油页岩含矿区地处松辽盆地东南隆起区，主要发育于上白垩统青山口组一段、嫩江组一、二段。油页岩有机质的干酪根类型为Ⅰ-Ⅱ₁型，质量较好，处于成岩的未成熟阶段。油页岩含油率与有机碳和氢元素含量间存在明显的线性正相关关系，当有机碳质量分数＞6％或氢质量分数＞1％时构成油页岩。此外，有机质干酪根的显微组分可以反映有机质的类型，与含油率之间也存在一定的相关性。青山口-嫩江组沉积时期，该区温暖湿润的古气候条件、大规模的海侵和缺氧事件影响了油页岩中有机质的丰度和类型，从而影响了油页岩的含油率。

Controlling Factors on the Oil Yield of the Upper Cretaceous Oil Shale in the Nongan Area, Songliao Basin

The Nongan oil shale mine lies in the southeastern rising area of the Songliao Basin and oil shale was mainly hosted in the 1st member of the Upper Cretaceous Qingshankou Formation and the 1st-2nd member of the the Upper Cretaceous Nenjiang Formation. The oil shale in the area is good in quality and is in immature lithogenic stage. The kerogen types of the organic matter of the oil shale are Ⅰ-Ⅱ₁ types. Oil yield of the oil shale are apparently, linearly, and positively related to the content of organic carbon and hydrogen in the oil shale. When the content of the organic carbon is more than 6% or the content of hydrogen in rocks is more than 1%, then they can be classified as oil shale. Moreover, the maceral of organic kerogen can reflect the type of organic matter, which also has relation to oil yield. During the sedimentary period of the Qingshankou-Nenjiang Formations, humid warm palaeo climate conditions, large scale marine aggression and oxygen deficient events affected the abundance and types of the organic matter in oil shales, thus, also affected the oil yield of the oil shale apparently.