岩性油气藏 ›› 2016, Vol. 28 ›› Issue (4): 915.doi: 10.3969/j.issn.1673-8926.2016.04.002
孙雨1,董毅明1,王继平2,马世忠1,于利民3,闫百泉1
Sun Yu1,Dong Yiming1,Wang Jiping2,Ma Shizhong1,Yu Limin3,Yan Baiquan1
摘要:
针对松辽盆地红岗北地区扶余油层岩性油藏储层单砂体分布特征认识不清和岩性圈闭预测困难等问题,利用8 口井的岩心资料、226 个岩心样品分析测试结果和386 口井的测井资料等,研究了储层单砂体成因类型、接触关系和分布模式。结果表明,扶余油层的储层单砂体类型主要为分流河道、水下分流河道和河口坝砂体。平面上,多支分流河道或水下分流河道砂体及其控制的河口坝砂体呈密集的窄带状分布特征;垂向上,储层单砂体分布受控于沉积物供给量与垂向沉积演化特征,呈现“南北分异”和“垂向分段”特征。平面多支、垂向多层的分流河道砂体的相互叠置,造成了研究区扶余油层储层砂体分布复杂多变的特征。扶余油层不同分流河道或水下分流河道砂体之间的接触关系可分为叠置式、切叠式、迁移式和孤立式等4 种类型。分流河道或水下分流河道砂体与溢岸薄层砂体或河口坝砂体之间多为突变接触关系;多期溢岸薄层砂体或河口坝砂体常呈“堆砌”叠置关系。以上认识可为红岗北地区扶余油层岩性圈闭预测和油水分布规律研究提供一定的依据。
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