关键词: 介观分子模拟, 泡沫流体, 析液行为, 表面活性剂, 发泡能力

Abstract:

The foam stability is very important in the successive operation of foam fluids in drilling, and the drainage is the macroscopical representation of foam stability. The drainage behavior and liquid films of foam were studied by using the mesoscale molecule simulation. According to the structures of foam solution, the linkage of interfacial aggregation of surfactant molecules with the foaming ability was determined. The factors, including the force field, thickness of liquid film, density of surfactant molecule and the surfactant types, greatly affected the interface energy-formation, and the drainage behavior followed the decay equation regardless of the surfactant types. The molecule simulation could correctly express the foaming ability of different surfactants, especially in low surfactant concentration.

Key words: mesoscale molecule simulation, foam fluid, drainage behavior, surfactant agent, foaming ability