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地质学报  2006 

鄂尔多斯盆地陇东地区长8段古输导格架恢复

Keywords: 陇东地区,长8段,沉积微相,成岩作用

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Abstract:

结合岩心、测井资料,认为陇东地区沉积砂体主要为水下分流河道、河口坝砂体。结合成岩作用分析及成岩序列划分,认为在早白垩世末最大排烃期后,主要有连晶方解石对粒间物质和粒缘的交代、强酸性流体对杂基和粒缘的溶蚀及长石溶蚀三种成岩作用。综合沉积成岩作用分析,在早白垩末最大排烃期,油气运聚的优势通道在镇原―西峰―庆阳一带。

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