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聚合物驱油是较成熟的提高采收率的技术之一 ,但在高温、高矿化度的油藏或存在高渗透层油藏应用效果较差。本文针对卫 95 - 1 8块的地层特点。经过交联聚合物体系配方优化、性能指标评价等实验 ,选出了具有良好抗温、抗盐及剪切恢复性能的交联聚合物体系。岩心模拟驱替实验中 ,平均提高采收率 1 0 .3- 1 5 .8% ,残余阻力系数 1 4.0。在此基础上制定了W 95 - 1 8块的交联聚合物驱油方案
Polymer flooding is one of the more mature technologies to improve oil recovery, but it is less effective in high temperature and high salinity reservoirs or in reservoirs with high permeability. This article is aimed at the characteristics of Wei 95 - 1 8 blocks. Through the optimization of formulation of cross-linked polymer system, evaluation of performance index and other experiments, a cross-linked polymer system with good resistance to temperature, salt and shear recovery was selected. In the core simulation displacement experiment, the average recovery rate was 103.58% and the residual resistance coefficient was 4.0. Based on this, a W 95 - 1 8 cross-linked polymer flooding scheme was developed