低渗透油藏驱油用聚合物相对分子质量确定方法的研究进展

Research Progress of Determination of Polymer Molecular Weight for Oil Recovery in Low Permeability Reservoirs

李丹丹 王业飞 张鹏 何宏 徐晓丽

LI Dan-Dan ，WANG Ye-Fei ，ZHANG Peng ，HE Hong ，XU Xiao-Li

选择与渗透率相匹配的聚合物相对分子质量是低渗透油藏聚合物驱提高采收率技术的关键。本文综述了目前国内外低渗透油藏驱油用聚合物相对分子质量的确定方法，指出选择与渗透率相匹配的聚合物相对分子质量时需综合考虑注入性能、不可及孔隙体积、油藏地质条件等因素。低渗透油藏单独聚合物驱采收率增幅不大，建议与其他化学剂复配使用。

Polymer molecular weight associated with the permeability was the key factor affecting polymer flooding in EOR of low permeability reservoirs. The determination method of polymer molecular weight for low permeability reservoirs at home and abroad was reviewed in this article. When polymer molecular weight associated with permeability was chosen，factors should be considered such as polymer injectivity，inaccessible pore volume and reservoir geological conditions ，etc. The enhancement of polymer only in oil recovery was low ，and combination with other chemicals was recommended.