聚表剂溶液性能评价及驱油效果研究

Characteristics Evaluation and Displacement Effect of Poly-surfactant Solutions

针对大庆油田聚表剂驱油试验区块应用的聚表剂体系,开展了主要性能评价试验和岩心驱油试验,评价了聚表剂体系乳化性能、粘度稳定性、抗盐性能;对比分析了聚合物驱和聚表剂驱的驱油效果。研究表明,相同条件下聚表剂溶液的抗盐性能、增粘性能、粘度稳定性均优于聚合物溶液;驱油效果优于聚合物溶液,提高采收率值高出5%左右,注入能力高于聚合物溶液,且明显改善了有效厚度小于0.5m储层及表外储层的动用状况,增油效果明显,水驱后提高采收率20.0%以上。

The poly-surfactant system is used in poly-surfactant flood test area in Daqing Oilfield.Primary characteristic evaluation experiments and core displacement test are carried out to evaluate the emulsification,viscosity stability and salt-resistant property of the poly-surfactant system.The research shows that the salt-resistant property,viscosity improvability and viscosity stability are all better than polymer solutions under the same conditions,and its displacement efficiency is better than polymer solutions,for the oil recovery of poly-surfactant flood can be enhanced by 5%OOIP.Its injectivity is higher than that of polymer solutions,and swept efficiency for reservoir thickness less than 0.5m and untabulated reservoirs are greatly improved,obviously high displacement effect is obtained,its recovery efficiency can improved by 20%OOIP.