一种高稳定性水基泡沫体系的制备与性能评价  

Preparation and Evaluation of an Aqueous Foam System with High Stability

作　　者：敬加强[1] 李业[1] 代科敏 肖飞[1] 檀家桐[1] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]中国石油集团工程设计有限责任公司西南分公司,四川成都610213

出　　处：《油田化学》2013年第3期384-388,共5页Oilfield Chemistry

基　　金：国家自然科学基金"稠油流动边界层在水基泡沫作用下的阻力特性研究"(项目编号51074136)

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,但泡沫本质上是热力学不稳定体系,良好的稳定性是其应用的前提。基于不同表面活性剂的协同作用,利用WaringBlender法评价复配体系的起泡及稳泡能力,由此筛选出一种高稳定性的水基泡沫体系AFS-2,测试分析其微观形态,评价其油敏性及盐敏性。实验结果表明,最优体系AFS-2的组成为：1g/LSDS＋1g/L3#＋3g/LPAM＋3g/LSF-1＋3g/L十二醇;在20℃下,100mL的AFS-2基液的起泡量为380mL,气泡呈球形,直径在10数100μm之间,属于典型的细小泡沫,半衰期长达6050min,稳定性高;0#柴油、塔河普通稠油及风城超稠油三种油品对AFS-2体系的稳定性影响较大,但重质稠油比轻质油品的破坏能力弱,当风城超稠油浓度小于10.6g/L时,体系半衰期仍大于3720min;当CaCl2浓度小于1g/L或NaCl浓度小于10g/L时,AFS-2泡沫体系仍可保持足够的稳定性。Aqueous foam is widely used in oil drilling, oil displacement, mineral flotation and so on; however, the foam belongs to an essentially thermodynamically unstable system. Based on the synergy of different surfactants, the foaming ability and stability of their mixtures were investigated through Waring Blender method, and an aqueous foam system with high stability, named as AFS-2, was screened out. And then, its microstructure was observed, and its oil-sensitivity and salt-sensitivity were evaluated. The experimental results showed that the best system AFS-2 was composed of 1 g/L SDS, 1 g/L 3#, 3 g/L PAM, 3 g/L SF-1 and 3 g/L dodecanol. The volume of AFS-2 foam generated by its 100 milliliters solution was 380 milliliters at 20℃, and the bubbles were round, and their diameters were distributed within the range of 10-100 Ixm. The half-life period of the system was 6050 minutes which meant that the AFS-2 system had high stability. Three kinds of oils, including 0# diesel, Tahe heavy oil and Fengcheng super-heavy oil, could strongly destroy the foam. At the same time, the higher the oil viscosity, the weaker the damage capability to the foam. When the concentration of Fengcheng super-heavy oil wais less than 10.6 g/L, half-life period of the system was more than 3720 min. When the concentrations of CaCI： and NaC1 were less than 1 g/L and 10 g/L, respectively, AFS-2 foam system could maintain adequate stability.

关 键 词：水基泡沫 表面活性剂 发泡能力 稳定性 油敏性 

分 类 号：TE39[石油与天然气工程—油气田开发工程]