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Clastic diagenesis and reservoir characteristics of Funing Formation in north slope of Gaoyou Depression in Subei Basin
Author(s): 
Pages: 43-49
Year: Issue:  2
Journal: ACTA PETROLEI SINICA

Keyword:  苏北盆地高邮凹陷阜宁组成岩矿物成岩作用次生孔隙储层性质;
Abstract: 高邮凹陷北斜坡阜宁组碎屑岩储层以细砂岩和粉砂岩为主,砂岩类型主要为长石砂岩、岩屑长石砂岩和少量长石岩屑砂岩.主要成岩矿物类型为粘土矿物、石英和碳酸盐等.储层以次生孔隙发育为主,粒间孔隙和骨架颗粒溶孔最为发育.阜宁组成岩演化阶段处于早成岩B期至晚成岩A期.机械压实作用比较明显,但次生溶蚀作用亦表现得十分强烈.阜宁组储层性质明显地受到沉积微相和成岩作用的影响.在阜一段三角洲主要砂体微相中,沉积物粒度较粗、厚度较大的河道和砂坝砂的储集物性明显优于各种粒度较细、厚度较薄的席状砂体.阜三段三角洲前缘砂体发育,水下分流河道和河口砂坝物性最好,前缘席状砂及其他侧翼砂体的物性较差.平面上储层性质主要表现为相控特点,并具有较好的规律性.
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