砂岩油藏窜流通道调堵剂研究进展

Research Progress on Plugging Agents for Channeling-path of Sandstone Reservoirs

张同凯

ZHANG Tongkai

陆相沉积类型的砂岩油藏孔隙结构复杂，储层非均质性严重，长期注水冲刷后形成的窜流通道加剧了平面矛盾，严重影响了油田采收率及开发效果。根据砂岩油藏窜流通道的成因和现状及技术和经济的要求，从堵剂的类型、封堵机理及性能等方面综述了符合砂岩油藏窜流通道特点的六大类堵剂，主要包括聚合物凝冻胶类、树脂类、颗粒类、沉淀类、微生物类和泡沫类调堵剂。六类调堵剂均有各自的优缺点，需根据砂岩油藏的特征，系统全面地研究封堵窜流通道的抑制方法，筛选合适的堵剂。参 34

Due to the complex pore structure of sandstone reservoirs of continental sedimentary type and severe reservoir heterogeneity，the channeling-path formed after long-term water flooding aggravated the plane contradiction，and the recovery efficiency and development effect of oilfields were seriously affected. According to the origin，present situation，technical and economic requirements of channeling-path of sandstone reservoirs，six kinds of plugging agents which accorded with the characteristics of channeling-path of sandstone reservoirs were reviewed from the type of plugging agent，plugging mechanism and performance. The types of six plugging agents mainly included polymer gel，resin，particle，precipitation，microorganism and foam. The plugging agents had their own advantages and disadvantages. So it was necessary to study systematically and comprehensively the sealing method of channeling-path to select suitable plugging agents on the basis of the characteristics of sandstone reservoir.