疏水缔合聚合物溶液的渗流特性

Seepage characteristics of new hydrophobic associated polymers solution

针对渤海某高渗透油藏,单纯依靠聚合物溶液粘度对大孔道中的驱替进行流度控制具有较大难度。对疏水缔合聚合物溶液在高渗透多孔介质中的渗流特性的研究发现:随着疏水基摩尔分数的增加,梳型疏水缔合聚合物的溶液结构增强,在高渗透多孔介质中的阻力系数先增加后降低,但降低的幅度小,而残余阻力系数则一直增加;当疏水基摩尔分数相同时,星型比梳型疏水缔合聚合物的溶液结构强,在高渗透多孔介质中的阻力系数和残余阻力系数较高,星型疏水缔合聚合物能够更有效地改善流度比,降低水相渗透率。实验结果表明,疏水缔合聚合物的溶液结构能够提高聚合物溶液在高渗透多孔介质中的流度控制能力。

It is very difficult to realize mobility control in maeroporous channel by improving the viscosity of polymer in certain high permeability oil reservoir in Bohai Oilfield. So mobility control in porous media with high permeability can be realized by combi-ning the solution structure and viscosity. The seepage character-istics of structural hydrophobic associated polymers were re-searched in porous media with high permeability. It indicates that structure of the pectinate hydrophobic associated polymers solu-tion is strengthened and the resistance factor increases first but then drops by a lower degree with the increase of the content of hydrophobic group,while residual resistance factor always increa-ses. With the same content of the hydrophobic group,astral hy-drophobic associated polymers solution has a stronger structure,abetter resistance factor,and a higher residual resistance factor than those of the pectinate hydrophobic associated polymers,which are also able to improve mobility ratio and decline water phase permeability.