【摘要】 安棚油田古近系核桃园组三段下亚段是重点勘探层位,其沉积相研究对该油田的勘探、开发具有重要指导意义。以岩心分析资料及大量测井与录井资料为基础,在沉积特征分析基础上,认为安棚油田核三段为近源扇三角洲沉积,主要发育扇三角洲前缘和前扇三角洲两个亚相,缺乏扇三角洲平原亚相,并将扇三角洲前缘进一步划分为近源水下分流河道、远源水下分流河道、河口坝、远砂坝、前缘席状砂及分流间湾6种沉积微相类型。通过对沉积微相研究,揭示了沉积微相对储集岩物性的控制作用,确定了沉积微相与油气分布的关系。结果表明,不同沉积相带物性及含油气性差异明显,远源水下分流河道、河口坝物性好,是油气聚集的主要相带;远砂坝及前缘席状砂则相对较差。更多还原

【Abstract】 The lower No.3 section of Hetaoyuan formation of Paleogene in Anpeng oilfield is a major horizon for exploration, its sedimentary facies study is of significant guidances for exploration and development of this field. Based on core lab, well log and geological logging data and analysis of the depositional characteristics, it is believed that the No.3 section of Hetaoyuan formation belongs to a near-source fan deltaic deposit with fan delta front and pro-fan delta subfacies, except for fan delta plain. The fan delta front is furthermore divided into the near-source and the far-source underwater distributary channels, the mouth bar, the far bar sand, frontal sheet sand and inter-tributary channel. The sedimentary microfacies study reveals its effect on the reservoir quality, confirming the relationship between the microfacies and petroleum distribution. The results show that there exist apparent differences of reservoir quality and petroliferous feature in different sedimenrary facies. The far-source underwater distributary channel and mouth bar are good in reservoir quality, being the main facies for petroleum accumulation; the frontal sheet sand and far bar sand are relatively poor.更多还原