柴达木盆地东部地区石炭系泥页岩生烃条件及选区

发布时间：2018-09-11 14:56

【摘要】：柴达木盆地石炭系露头、钻井资料均揭示,其为海相沉积烃源岩,且石炭系泥页岩气展现出良好的勘探前景。对柴达木盆地东部石炭系泥页岩沉积环境、有机质丰度、类型和演化程度进行综合评价,利用野外露头、探井、地震、非震等资料证实了石炭系的残留及分布。研究认为,柴东地区石炭系泥页岩主要集中在上石炭统滨岸潮坪沉积的克鲁克组,发育炭质泥页岩、暗色泥岩2种烃源岩,有机碳均值为3.08%,有机质类型为Ⅱ—Ⅲ型,处于成熟-高成熟演化阶段,73%的样品达到中等-好烃源岩。平面上主要分布于尕丘、欧南、霍布逊和德令哈凹陷,分隔性较强,具有多个厚度中心,其中以欧南凹陷石灰沟地区和霍布逊凹陷落实程度高、资源潜力大,是泥页岩气最有利的发育区。
[Abstract]:Carboniferous outcrop and drilling data in Qaidam Basin reveal that it is marine sedimentary source rock and Carboniferous shale gas shows a good exploration prospect. The sedimentary environment, organic matter abundance, type and evolution degree of Carboniferous shale in eastern Qaidam Basin were comprehensively evaluated. The residual and distribution of Carboniferous were confirmed by field outcrop, exploration well, earthquake and non-seismic data. The study shows that the Carboniferous shale in the eastern Qaidong area is mainly concentrated in the Kruke formation of the upper Carboniferous shoreline tidal flat. Two hydrocarbon source rocks, carbonaceous shale and dark mudstone, are developed. The organic carbon mean value is 3.08 and the organic matter type is type 鈪，

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