ZIRCONIUM DISPERSED-PARTICLE GEL COMBINATION FLOODING SYSTEM AND PREPARATION METHOD THEREOF

摘要

The invention belongs to the field of oilfield chemistry and specifically relates to a zirconium dispersed-particle gel combination flooding system. The zirconium dispersed-particle gel combination flooding system comprises multi-scale zirconium dispersed-particle gel, polyether nonionic surfactant, and water as mixing liquid; the weight percentage of multi-scale zirconium dispersed-particle gel in the combination flooding system ranges from 0.16% to 0.24%; the weight percentage of polyether nonionic surfactant in the combination flooding system ranges from 0.1% to 0.4%; the rest is water, and the sum of the weight percentage of the each component is 100%. The multi-scale zirconium dispersed-particle gel and polyether nonionic surfactant of the present invention perform good synergistic effect, which reduces the oil/water interfacial tension to the order of magnitude of 10−3 mN/m, significantly improves the displacing efficiency of the flooding agent, avoids the adverse effects caused by polymer viscosity loss in binary combination flooding or ternary combination flooding and the adverse effects caused by alkalis, as well as improves the flooding performance of the combination flooding system.

主权项

1. A zirconium dispersed-particle gel combination flooding system, comprising: multi-scale zirconium dispersed-particle gel, polyether nonionic surfactant and clean water or treated oilfield recycled produced water; wherein,
the weight percentage of multi-scale zirconium dispersed-particle gel in the combination flooding system ranges from 0.16% to 0.24%; the weight percentage of polyether nonionic surfactant in the combination flooding system ranges from 0.1% to 0.4%; the rest is water, and the sum of the weight percentage of each component is 100%.