胶态分散凝胶深度调剖技术在大庆油田聚驱开发中的应用

Application of colloidal dispersion gels in-depth conformance improvement in polymer flooding development of Daqing oilfield.

介绍了大庆油田应用胶态分散凝胶深度调剖技术的凝胶成胶机理、影响成胶的因素、凝胶在多孔介质中的渗流特征及现场试验效果 .室内岩芯模拟研究及现场典型井试验表明 ,流动凝胶在多孔介质中可流动 ,在单井注入 15 0 0 0～ 2 0 0 0 0 m3 流动凝胶体系过程中 ,注入压力逐渐升高 ,可以实现深度调剖 ,更好地提高聚合物驱采收率 .

This paper presents the gelling mechanism of the HPAM/AlCit CDG (colloidal dispersion gels), which is used in in-depth profile control before polymer flooding in oilfield for enhancing oil recovery, and factors of affecting the gelling, and the characteristic of flowing through the porous medium, and the effectiveness of the field test in Daqing Oilfield. The principles of CDG enhancing oil recovery are because of its good flow characteristic through porous media and high residual resistance factor after flowing through porous media, which can improve conformance of polymer (or water) flooding. It is shown that the oil recovery could be enhanced through CDG in-depth profile control before polymer flooding in the laboratory flow simulating of cores and tests of 3 typical wells.