表面活性剂驱油效率的影响因素研究

在83℃下测定了3种表面活性剂DL-S、HL-Y/NNR、GZ-16的油水界面张力、乳化能力以及改变油藏岩石润湿性的能力。利用低渗透岩心驱油实验研究表面活性剂的这3种特性对驱油效率的影响。结果表明,表面活性剂的浓度在1 000 mg/L时,DL-S的油水界面张力达到10-3mN/m超低数量级,HL-Y/NNR表现出较为优越的乳化性能,GZ-16具有较好的润湿性能。在驱油实验中,具有最好乳化性能的HL-Y/NNR提高采收率的幅度最大为12.91%,其次为具有超低界面张力的DL-S,相较而言,改变润湿性的能力对驱油效率的影响最小。

Factors influencing of the surfactant oil displacement efficiency

A series of performance of three surfactants was measured at 83 ℃,including the interfacial tension,emulsification capacity and the ability to change the wettability of reservoir rock.The effect of these three performances for oil displacement efficiency was studied by the low permeability core flooding experiment.The results showed that the oil-water interfacial tension of the surfactant DL-S was reduced to 10-3 mN/m,HL-Y/NNR showed excellent emulsifying properties,and GZ-16 had good wetting properties,when the concentration was 1 000 mg/L;in the flooding experiment,HL-Y/NNR enhanced oil recovery rate to a maximum of 12.91%,followed by the DL-S.In comparsion,the minimal impact was the ability to change the wettability for oil displacement efficiency.