岩性油气藏 ›› 2022, Vol. 34 ›› Issue (4): 116127.doi: 10.12108/yxyqc.20220411
白雨1, 汪飞1, 牛志杰1, 金开来2, 李沛毅2, 许多年3, 陈刚强2
BAI Yu1, WANG Fei1, NIU Zhijie1, JIN Kailai2, LI Peiyi2, XU Duonian3, CHEN Gangqiang2
摘要: 准噶尔盆地玛湖凹陷及其周缘累计探明石油地质储量近30×108 t,油源主要来自凹陷内的二叠系风城组碱湖相烃源岩。通过黄金管热模拟试验,并采用Kinetic软件进行计算,获得了玛湖凹陷二叠系风城组烃源岩的各类烃产率和动力学参数,建立了生烃模式,进而对该套烃源岩的生烃能力进行了综合评价。研究结果表明:①玛湖凹陷二叠系风城组碱湖相烃源岩总烃产率高达412.24 mg/(g·TOC),其中液态烃类产率随温度升高先增加而后降低,高峰温度为420~460℃,气态烃产率持续增加,总产油率高于产气率,气态烃碳同位素具油型气特征。②风城组碱湖相烃源岩C1,C2—C5,C6—C14,C14+的生成活化能主峰值分别为268 kJ/mol,255 kJ/mol,251 kJ/mol,247 kJ/mol。③玛湖凹陷风城组碱湖相烃源岩的生烃模式与国内外14个不同盆地具有相似性,均为早期出现生油高峰、晚期持续生气的特征,且单位TOC的生烃能力中等偏上。
中图分类号:
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