摘要
水基泡沫在石油钻井、驱油及矿物浮选等方面应用广泛,但因其自身结构的复杂性及不稳定性,准确描述其流变性需要考虑液膜排液、气体扩散、泡沫质量、泡沫结构、可压缩性、壁面滑移、测量系统相对于气泡的尺寸、环境温度及压力等多方面因素,以致于目前尚无有关泡沫流变性的公认理论。实验研究过程中控制壁面滑移的较普遍做法是增加流道壁面(转子表面或管壁)的粗糙度,基于适当假设所提出的一些理论修正方法具有较好的适应性。体积平衡法假设泡沫管流摩擦系数为常量,在一定程度上解决了泡沫可压缩性给管流压降计算所带来的困难。目前普遍认为泡沫流变性可用幂律模式或赫谢尔–巴尔克莱模式很好地描述,是否存在"屈服应力"则因测试条件差异而存在争议。
Water based foams have been widely used in oil well drilling, foam flooding, mineral flotation and other fields. Because of the complexity and instability of their own structure, the exact description of their rheological properties should consider various factors such as liquid film drainage, gas diffusion, foam mass and structure, foam compressibility, wall slip, bubble size compared with measuring system, environment temperature and pressure and so on. This leads to no generally accepted theory for their rheological behavior. A widely available method of controlling the wall slip is to increase surface roughness of the flow channels such as rotor surface or pipe wall during the experimental investigation, and some theoretical modification methods deduced from some appropriate hypotheses have a better adaptability. The volume equalized constitutive equation assumes that the friction factor of foam flow in pipe is a constant, which can solve the difficulty of its pressure drop calculation due to the foam compressibility to some extent, k is widely believed that the foam theological properties can be satisfactorily described by power law or Herschel-Bulkley models, but the existence of ＂yield stress＂ for the aqueous foams is being disputed due to different measurement conditions.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期173-178,共6页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金项目"稠油流动边界层在水基泡沫作用下的阻力特性研究"(51074136)
高等学校博士点基金项目"稠油掺水流动黏度测定与压降预测研究"(20115121110004)
关键词
水基泡沫
流变性
壁面滑移
滑移修正
可压缩性
water based foam
rheological behavior
wall slip
slip correction
compressibility
