关键词: 分流, 泡沫, 临界毛管压力, 临界饱和度, 圈闭因子

Abstract: Form is an excellent diverting agent in matrix acidizing for its less pollution and easy to cleanup. By analysis of foam diverting mechanism and foam flow in porous media, trapping factor considering different gas saturation before and after diverting has been established, on the basis of which, a new foam diver-
sion model has been developed. Algorithm is obtained in example calculation. Results have show that injection amount of foam exits an optimum value and trappingfactor is the most important parameter in foam diverting.

Key words: fractional flow, foam, capillary pressure, critical saturation, trapping factor