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Development environment and lithological sequence of marine source rock:Taking Ordos Basin as an example
Author(s): 
Pages: 25-30
Year: Issue:  1
Journal: Acta Petrolei Sinica

Keyword:  Ordos Basinmarine source rockcarbonate rockPingliang shalelithological sequencedeepwater slope;
Abstract: 国内外海相大油气田的烃源岩多为黏土矿物含量较高的泥页岩、油页岩和泥灰岩,形成于由台地向海槽过渡的深水斜坡环境,而碳酸盐岩形成于与大气交换条件较好的浅水环境,是有机质丰度低和干酪根类型差的根本原因.从机理上讲,碳酸盐岩排烃效率低于泥质岩,并且不存在有机碳含量随成熟度升高而有规律降低的现象,不能成为有效烃源岩.鄂尔多斯盆地西缘中奥陶统平凉组自东而西发育的碳酸盐岩-泥质岩、灰岩-硅质页岩和海底碎屑岩反映...
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