岩性油气藏 ›› 2020, Vol. 32 ›› Issue (1): 5165.doi: 10.12108/yxyqc.20200106
陈怡婷1,2, 刘洛夫1,2, 王梦尧1,2, 窦文超1,2, 徐正建1,2
CHEN Yiting1,2, LIU Luofu1,2, WANG Mengyao1,2, DOU Wenchao1,2, XU Zhengjian1,2
摘要: 为研究鄂尔多斯盆地西南部长6、长7储集层特征及其控制因素,开展了岩心观察和描述、铸体薄片鉴定、扫描电镜分析和其他分析测试工作。结果表明:①研究区可识别出垂积作用、侧向加积作用、前积作用和浊积作用等4种沉积类型,划分出水下分流河道、河口坝、重力流砂体等多种沉积微相,并识别出6种成岩相。②储层的物性由沉积作用与成岩作用共同控制,原始沉积组分较粗、塑性矿物含量低的岩石多发育绿泥石薄膜,且次生溶蚀孔隙更发育,储层物性较好;原始沉积组分较细、塑性矿物含量高的岩石,压实作用较强,硅质和碳酸盐胶结物发育,易形成致密储层。③沉积相带决定了岩石先天性的物质基础,成岩作用控制了后期岩石物性的改造效果,二者共同控制了现今岩石的储集性。该研究成果对鄂尔多斯盆地西南部有利储层预测具有指导作用。
中图分类号:
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