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烃源岩抽提物和原油中的 1 7α(H) 重排藿烷可能与细菌藿类先质有关 ,但是其含量的高低明显受沉积环境控制 ,在氧化至亚氧化沉积环境和酸性介质及黏土矿物催化作用下 ,细菌藿类先质易于发生重排 ,形成 1 7α(H) 重排藿烷。从塔里木盆地库车坳陷、叶城凹陷和巴楚隆起的烃源岩发育特征和产物特征来看 ,1 7α(H) 重排藿烷具有明显的指相意义 ,即高含量的 1 7α(H) 重排藿烷一般反映滨浅湖—沼泽相的煤系泥质烃源岩的沉积特征 ,这种沉积环境最具备形成 1 7α(H) 重排藿烷的条件。图 3参 7
The 1 7α (H) rearranged hopane in the source rocks and crude oil may be related to the genus Agrobacterium, but its content is obviously controlled by sedimentary environment. In the oxidation and sub-oxidative sedimentary environment and acidic media and Under the catalysis of clay minerals, bacterial gossypii precursors are easily rearranged to form 1 7α (H) rearranged hopane. From the developmental characteristics and product characteristics of source rocks in the Kuqa Depression, the Yicheng Sag and the Bachu uplift in the Tarim Basin, the 1 7α (H) rearranged hopane has a significant finger-pointing significance, namely high content of 17α H) Rearranged hopane generally reflects the depositional characteristics of coal-derived mudstone source rocks of the shallow lake-swamp facies, which is best suited for the formation of 17α (H) rearranged hopane. Figure 3 Reference 7