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利用核磁共振成象技术（ＮＭＲＩ），采用质子密度的２ＤＦＴ的自旋回波成像方法，针对辽河油田的实际情况，采用注泡沫剂封堵地层的方法进行了研究。辽河油田三类发泡剂和ＳｕｎＴｅｃｈⅣ表面活性剂的发泡体积在高温下减小缓慢，具有良好的热稳定性，表明发泡剂形成的泡沫膜的强度和韧性较好，满足充当高温发泡剂的必要条件。静态评价实验表明发泡性能随温度升高而降低，同时温度越高，递减率越大。泡沫驱替过程是一个不稳定的过程，压力的变化程度直接影响着泡沫剂驱油的效果，同时，最大泡沫剂驱替压力受到了注入速度、岩心物性、温度、时间、含油饱和度、泡沫剂粘度和浓度等影响。２＃泡沫剂的效果好于３＃，１＃最差。高渗透地层的含油饱和度在蒸汽驱替以后急剧降低，而在泡沫剂注入后出现含油的富积；相反，低渗透地层的含油饱和度在蒸汽驱替时的变化不大，而在注入泡沫剂之后，含油饱和度急剧降低。这说明，由于泡沫剂的注入改变了压力的分布，使得低渗透地层的原油的流度减低，改善了低渗透地层的蒸汽驱替效果；同时，由于泡沫剂的注入，也提高了高渗透地层的驱油效率
Using nuclear magnetic resonance imaging technology (NMRI), spinodal imaging using 2DFT of proton density, a method of plugging the formation with foam injection was studied according to the actual situation of Liaohe Oilfield. The foaming volume of the three types of foaming agent and SunTech Ⅳ surfactant in Liaohe Oilfield decreases slowly at high temperature and has good thermal stability, indicating that the foam film formed by foaming agent has better strength and toughness, Necessary conditions for the agent. Static evaluation experiments show that foaming properties decrease with increasing temperature, while the higher the temperature, the greater the decreasing rate. The process of foam flooding is an unstable process. The degree of pressure change directly affects the frying agent flooding effect. At the same time, the maximum froth displacement pressure is affected by injection velocity, core physical property, temperature, time, oil saturation, foam Agent viscosity and concentration and other effects. 2 # foam effect is better than 3 #, 1 # worst. Oil saturation in high permeability formations decreases sharply after steam flooding and oil enrichment occurs after foam injection. Conversely, oil saturation in low permeability formations does not change much with steam flooding, After the oil, the oil saturation decreased sharply. This shows that the pressure distribution is changed due to the injection of the foaming agent, which reduces the flow of the crude oil in the low-permeability formation and improves the steam flooding effect in the low-permeability formation. At the same time, the infiltration of the foaming agent improves the high-permeability formation Drive efficiency