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二连盆地格日勒敖都凹陷准宝1井侏罗系阿拉坦合力群烃源岩的Ro分布范围为0.58%～0.67%,平均值为0.63%,Tmax平均值大于435℃,处于低熟—成熟生烃演化阶段;Pr/Ph分布范围为0.39～5.24,平均值为1.62,表明其沉积环境为偏还原;伽马蜡烷/C30αβ藿烷分布范围为0.07～1.45,平均值为0.37,表明其沉积于淡水—微咸水的湖沼;C29/C27ααα20R甾烷比值均大于1,表明烃源岩生源既有低等生物贡献又有高等植物贡献,且高等植物贡献占优势。通过烃源岩和原油的地球化学特征对比,表明准宝1井原油来自阿拉坦合力群烃源岩。阿拉坦合力群是二连盆地有利的油气勘探方向。
The Ro distribution range of the Jurassic altruistic source rock of Zhubao-1 in Erde Sag of Erlian Basin ranges from 0.58% to 0.67% with an average of 0.63% and the average value of Tmax is greater than 435 ℃ - mature hydrocarbon generation stage; Pr / Ph distribution ranged from 0.39 to 5.24 with an average value of 1.62, which indicated that the sedimentary environment was partial reduction; Gamma wax / C30αβ hopane ranged from 0.07 to 1.45 with an average of 0.37, Indicating that they are deposited in freshwater-brackish water lakes and marsh; C29 / C27ααα20R sterane ratio greater than 1, indicating that source rock source both low biological contributions and higher plant contribution, and the contribution of higher plants. By comparing the geochemical characteristics of source rock and crude oil, it shows that the crude oil in Zhubao 1 comes from the Alathan Hop Group source rock. Alathan Heli Group is the favorable oil and gas exploration direction in Erlian Basin.