气液界面特性对泡沫稳定性影响研究

Influence of the characteristics of gas liquild interface to foam stability

泡沫稳定性是影响泡沫驱实施效果的核心因素之一。通过对泡沫携液能力、动态表面张力、黏弹模量、半衰期、发泡量的测试对影响泡沫稳定性因素进行研究,确定影响泡沫体系稳定性的因素;利用管式模型对泡沫体系在多孔介质中再生能力进行测试,研究再生能力、泡沫稳定性之间关系。结果表明,黏弹模量同泡沫稳定性具有线性关系,泡沫稳定性同其再生能力并不是一一对应关系,泡沫在多孔介质条件下的再生能力是影响泡沫驱效果的首要关键因素。在进行泡沫驱泡沫剂优选中应对其在多孔介质中再生能力和泡沫稳定性进行综合考虑。

Foam stability is one of the key factors that influence the effect of foam flooding. This paper analyzes the factors that influence the foam stability by testing the foam entrainment capability, the dynamic surface tension, the viscoelasticity, the half life period, and the foaming capacity. The factors that affect the stability of the foam system are confirmed. A tubular model is utilized to test the regeneration capability of the foaming system within porous medium so as to research the relationship between the regeneration capability and the foam stability. Results show that the viscoelasticity is in linear relationship with the foam stability but there is no corresponding relationship between the foam stability and the foam regeneration capability. The regeneration capability of foam within porous medium is the primacy key factor affecting the foam flooding effect. The foam regeneration capability within porous medium and the foam stability must be taken into account to select foaming agent for foam flooding.