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    张海龙, 刘招君, 史冀忠, 孟庆涛. 罗子沟盆地下白垩统大砬子组油页岩成矿规律分析[J]. 中国地质, 2007, 34(1): 86-91.
    引用本文: 张海龙, 刘招君, 史冀忠, 孟庆涛. 罗子沟盆地下白垩统大砬子组油页岩成矿规律分析[J]. 中国地质, 2007, 34(1): 86-91.
    ZHANG Hai-long, LIU Zhao-jun, SHI Ji-zhong, MENG Qing-tao. Formation characteristics of oil shale in the Lower Cretaceous Dalazi Formation in the Luozigou basin[J]. GEOLOGY IN CHINA, 2007, 34(1): 86-91.
    Citation: ZHANG Hai-long, LIU Zhao-jun, SHI Ji-zhong, MENG Qing-tao. Formation characteristics of oil shale in the Lower Cretaceous Dalazi Formation in the Luozigou basin[J]. GEOLOGY IN CHINA, 2007, 34(1): 86-91.

    罗子沟盆地下白垩统大砬子组油页岩成矿规律分析

    Formation characteristics of oil shale in the Lower Cretaceous Dalazi Formation in the Luozigou basin

    • 摘要: 提要:罗子沟盆地油页岩赋存于下白垩统大砬子组二段,埋藏浅,地层倾角缓,含油率为3.51%~14.37%。油页岩具有典型内陆湖泊成因特点,含有大量动植物化石,其成因类型为腐泥型(Ⅰ型)和腐植腐泥型(Ⅱ1型)。大砬子组为一个完整的三级层序,主要油页岩层形成在水进体系域和高水位体系域,含油率高,赋存稳定。从平面上,油页岩富矿中心在CK26、CK30、CK35、CK40孔附近,呈东西向带状分布;在纵向上,共见有29层油页岩,其中有7层为可采油页岩层,2层和3层油页岩呈层状产出,连续、稳定、含油率高,具有巨大的经济开发价值。

       

      Abstract: Abstract:Oil shale of the Luozigou basin is hosted in the 2nd Member of the Lower Cretaceous Dalazi Formation. It is buried at shallow depth with a gentle dip of strata and contains 3.51 to 14.37wt% of oil equivalent. Oil shale formed in a typical inland lake environments and contains many animal and plant fossils. Its genetic types are sapropel type(Ⅰmodel) and saprolite-sapropel type(Ⅱ1 model). The Dalazi Formation is a complete third-order sequence and the main oil shale beds, which have a high oil content and are persistent, formed in a transgressive systems tract (TST) and a highstand systems tract (HST). In a plan view, high-grade oil shale is located near the CK26, CK30, CK35 and CK40 holes and distributed in an E-W-trending strip. Vertically, a total of 29 oil shale beds are found, of which seven beds are extractable. Oil shale beds 2 and 3 occur as continuous and persistent beds with a high oil content. They have great economic value.

       

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