西藏中仓盆地古近系丁青湖组生烃潜力与沉积有机相分析
发布时间:2018-03-31 14:51
本文选题:中仓盆地 切入点:丁青湖组 出处:《东北石油大学学报》2017年04期
【摘要】:以中仓盆地古近系丁青湖组为研究对象,根据烃源岩地球化学数据分析,探讨研究区丁青湖组生烃潜力及沉积有机相。结果表明:中仓盆地中丁青湖组灰岩、泥灰岩和泥岩为主要烃源岩。其中,灰岩、泥灰岩有机碳平均质量分数为0.33%,泥岩有机碳平均质量分数为0.32%,属于较差烃源岩;有机质类型为以Ⅱ1型为主的混合Ⅱ型,烃源岩热解峰温为422~446℃,镜质体反射率为0.48%~0.59%,属于低成熟阶段。根据显微组分将沉积有机相划分为湿地草本混生(沼泽)相。综合数据分析表明中仓盆地不具有较好的生烃潜力。这对认识中仓盆地油气勘探价值,以及在伦坡拉盆地群中寻找油气具有指导意义。
[Abstract]:Based on the geochemical data of source rocks, the hydrocarbon generation potential and sedimentary organic facies of the Dingqing Lake formation in Zhongcang Basin are discussed. The results show that the limestone of the Middle Dingqing Lake formation in Zhongcang Basin. The main source rocks are marl and mudstone, in which the average organic carbon content of limestone and marl is 0.33, the average organic carbon mass fraction of mudstone is 0.32, which belongs to poor source rock, and the organic matter type is mixed type 鈪,
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