新疆油田砾岩油藏调驱配方设计研究

Research on Profile Control Formula Design for Conglomerate Reservoirs in Xinjiang Oil Field

针对新疆油田砾岩油藏长期水驱开发后,形成大量水流优势通道的问题,运用统计分析方法,对不同类型的优势通道进行了分类,在此基础上设计了不同的调驱配方体系,得到了不同渗透率、不同变异系数、不同界面高度砾岩油藏的调驱配方体系设计方法。该成果在新疆油田六中东克下组、七中区克下组及七中区八道湾组3个砾岩油藏深部调驱现场进行了应用。研究结果表明,该方法设计出的调驱体系能有效封堵优势通道,截至2016年6月累计增油为10.4×10~4t,最大含水率下降幅度为12.5%,增油降水效果显著。研究成果对深部调驱技术在新疆油田的推广有重要意义。

In order to solve the problem that a large number of water dominant migration pathways were formed after long-term water flooding development of conglomerate reservoirs in Xinjiang oil field, statistical method is used to classify different types of dominant migration pathways. Profile control formula system is designed for different types of dominant pathways and the design methods are obtained for profile control formula system of conglomerate reservoirs of different permeability, different variation coefficient and different interface level. The result is applied in deep profile control for three conglomerate reservoirs in Xinjiang oil field including Kexia formation in east Liuzhong block, Kexia formation in Qizhong block and Badaowan formation in Qizhong block. The results show that the designed profile system can effectively plug dominant migration pathways. As of June, 2016, cumulative oil production had increased at 10.4× 104t and the largest watercut decline was up to 12.5%, with apparent oil increasing and watercut reducing effect. The research results are important to the promotion of deep profile control technique in Xinjiang oil field.