纳米微球组合调驱技术实验研究

Experimental study for nanosphere combination flooding technology

纳米微球调驱技术目前在海上油田已经大范围推广使用。但针对具有高渗透条带和大孔道的油藏,单一纳米微球驱仍难以取得较好的封堵能力,需要与传统聚合物凝胶类调剖技术配合使用。根据矿场实际情况,开展了不同调驱剂类型,组合驱方式和纳米微球后续聚合物凝胶驱三类矿场比较容易实现的组合调驱工艺驱油效果评价实验。实验结果表明,纳米微球与传统聚合物凝胶类调驱剂搭配使用,可有效提高油藏整体的驱油效率和波及体积,达到更为显著的增油降水效果。

At present,polymeric nanosphere flooding technology has been extensively used in offshore fields.However,it is still difficult for the single polymeric nanosphere flooding to achieve good sealing capacity in oil reservoirs with strong heterogeneity and big channel,which needs to be combined with traditional polymer gel profile modification technology.According to the field conditions,three experiments were carried out to evaluate efficiency of the combined flooding technology,including the type of flooding agent,the combined flooding mode and the follow-up polymer gel flooding with polymeric nanospheres.The experiments show that the combination of the polymeric nanospheres and the polymer can increase the oil displacement efficiency and sweep efficiency,and it can have more significant effect of oil precipitation.