松辽盆地葡西地区补充射孔研究

摘要

Wells in the Puxi area’ s development zone of Songliao Basin are dense, but there are still remaining oil relatively rich area.The inner zone of HeiⅡreservoir’ s distribution character of oil and water, reservoir char-acteristics are focuses on, to guide the fill hole.Studies have shown that:the area’ s oil distribution significantly af-fected by the fault control, the degree of oil and gas enrichment near fault is closely related with characteristics of fault development.Forward low amplitude structure controls the local accumulation of oil and gas.Difference is clear in different sedimentary microfacies, different parts in the same sedimentary microfacies’ physical properties are also differences, this difference in sandstone controls the local enrichment of oil and gas.All the HeiⅡ’ s oil-water interface is no uniform, but each deposition time unit has its own oil-water interface.Understand oil distribu-tion, the oil-bearing layers in fault edge or forward low amplitude structure or the place whose sandstone has good physical properties should be considered first when fill hole.Different rhythm sandstone’ s oil-bearing part is differ-ent, channel sandstone’s perforation in the lower sandstone, when mouth bar and far bar sandstone’s perforation in the upper portion of the sandstone.%松辽盆地葡西地区开发区内井网较密，但仍存在剩余油相对富集的区域。重点研究开发区内黑Ⅱ油层的油水分布特征、储层物性特征，指导补充射孔。研究表明：该区油水分布明显受断层控制，断层附近油气富集程度与断层的发育特征密切相关。正向微幅度构造控制了油气的局部富集。不同沉积微相的物性差异明显，同一沉积微相不同部位物性也存在差异，砂岩的这种物性差异控制了油气的局部富集。整个黑Ⅱ油层没有统一的油水界面；但是每个沉积时间单元，却有该层的油水界面。明确了油水分布特征，在补充射孔时要优先考虑动用断层边部、正向微幅度构造处、物性好的砂岩较发育处的含油层位。不同韵律的砂岩的含油部位不同，河道砂岩在砂岩下部射孔，河口坝和远砂坝砂岩在砂岩的上部射孔。