塔里木盆地原油沥青质钌离子催化氧化及油源

Ruthenium-ions-catalyzed oxidation of the asphaltenes of oils and oil-source correlation in the Tarim Basin

运用钌离子催化氧化(RICO)技术研究了塔里木盆地轮南、塔河、哈得逊地区及TD2井原油沥青质。其RICO产物包括一元酸、二元酸、支链酸、三环萜烷酸、藿烷酸、甾烷酸和4 甲基甾烷酸。键合在沥青质中的烷基侧链和生物标志物不易遭受生物降解作用,特别是甾烷与饱和烃中分布相似。沥青质的RICO研究结果表明,中、上奥陶统烃源岩为轮南、塔河、哈得逊原油的主力烃源岩。沥青质RICO技术为严重生物降解原油的油源对比提供了一种新的途径。

The asphaltenes in oils from the Lunnan, Tahe, Hadexun Oilfields and well TD2 were studied by Ruthenium-ions-catalyzed oxidation. The asphaltene RICO products include n-alkan acids, di-n-alkan acids, branched alkan acids, tricyclic terpan acids, hopanoic acids, steran acids and 4-methyl steran acids. The n-alkyl chain and the biomarker bounded on the asphaltene are uneasily to be biodegraded. The biomarker bounded on the asphaltene, especially sterane has similar distribution with that of the counterparts in saturated hydrocarbon. The asphaltene RICO indicates that the Middle and Upper Ordovician may be the main source rocks of the oils in Lunnan, Tahe and Hadexun Oilfields. The method of asphaltene RICO provides a new pathway for correlation of heavily biodegraded oil-source.