空气泡沫驱残余阻力系数影响因素研究

ResearchontheFactorsInfluencingtheResidualResistanceCoefficientofAirFoamFlooding

吴忠正 李华斌 牛忠晓 龚书 郭程飞 陈会文

WU Zhongzheng LI Huabin NIU Zhongxiao GONG Shu GUO Chengfei CHEN Huiwen

在华北油田文120 区块地层条件下（温度87℃、矿化度28291 mg/L），通过单管驱替实验，研究了起泡剂有效浓度、岩心渗透率、注入速度及压力对空气泡沫驱残余阻力系数的影响。结果表明，起泡剂有效浓度由0 增至0.1% 时，空气泡沫驱残余阻力系数由1 增至3.1，继续增大起泡剂有效浓度，残余阻力系数增幅变缓，最终趋于稳定；随填砂模型渗透率增加，残余阻力系数先增加后降低，渗透率为178 × 10-3μm2时的残余阻力系数最大（3.5）； 注入速度由0.5 增至3.0 mL/min时，残余阻力系数由2.1 增至3.3 后又降至2.6；压力由0 增至15MPa 时，残余阻力系数由3.1 增至3.6。图4 表1 参10

Under the formation conditions of Wen120 block in Huabei oilfield with 87℃and 28291 mg/L salinity，the influence of effective concentration of foaming agent ，core permeability，injection speed and pressure on the residual resistance coefficient of air foam flooding was studied by single tube displacement experiment. The results showed that when the effective concentration of foaming agent increased from 0 to 0.1% ，the residual resistance coefficient of air foam flooding increased from 1 to 3.1. With continuous increase of foaming agent effective concentration ，the residual resistance coefficient increased slowly ，and then became stable. The residual resistance coefficient increased first and then decreased with increasing permeability of sand-packed model，which reached maximum ( 3.5) when the permeability was 178 × 10-3μm2. When the injection speed increased from 0.5 to 3.0 mL/min，the residual resistance coefficient increased from 2.1 to 3.3 and then decreased to 2.6. When the pressure increased from 0 to 15MPa，the residual resistance coefficient increased from 3.1 to 3.6.