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油井堵水是提高油田无水采收率和最终采收率,增加油井产量,从而降低原油生产成本的一项井下工艺措施。选择性堵水技术又以作业简单、节省施工时间等优于非选择性堵水。采用聚合物选堵是较有前途的一种方法,国外已取得一定成效。水解聚丙烯酰胺(HPAM)在多孔介质中能显著降低水相渗透率而较少影响油的流动性,因而可作为油井选择性堵水剂。六十年代以来,,国外许多现场使用证明,水解聚丙烯酰胺作为油井选择性堵水剂有广阔的前途。从1970年开始,美国某公司用HPAM处理了400多口井,处理后,88％出现显著降低水油比,其中72％已收回处理费的2400％。又如,
Oil well water shut-off is to improve oil recovery and recovery rate of the final oil wells to increase oil production, thereby reducing the cost of crude oil production a downhole process measures. Selective water shut-off technology and simple operation, saving construction time is better than non-selective water shutoff. Polymer plugging is a more promising method, has made some achievements abroad. Hydrolyzed polyacrylamide (HPAM) can significantly reduce the water phase permeability in porous media with less affecting the fluidity of the oil, so it can be used as a selective well plugging agent. Since the 1960s, many field applications abroad have proved that hydrolyzed polyacrylamide has a promising future as an oil well selective plugging agent. Since 1970, a U.S. company has handled more than 400 wells with HPAM. After treatment, 88% showed a significant reduction in water-oil ratio, of which 72% recovered 2400% of the treatment fee. Again,