甜菜碱/聚合物复配泡排剂性能研究

Frothing Performance of Betaine/Polymer Binary Foaming System for High Sulfur Gas Well

为研发出适合于川东北地区高含硫气井的泡沫排水技术,用椰油酰胺丙基甜菜碱(CPB)和聚丙烯酰胺(PAM)制得二元复配体系为泡排剂。研究了CPB、PAM质量比对体系起泡能力的影响,考察了二元体系的耐温、耐硫化氢和耐盐性能。结果表明,当CPB、PAM质量比为6∶1时,二元复合体系的起泡能力最佳。该体系在175°C下的稳定性良好,与老化前相比,起始泡沫高度仅降低16.6%。CPB/PAM的起泡能力不受H_2S分压的影响,耐盐性较好,携液能力强,适用于高含硫气井的泡沫排水。

The binary system of cocamidopropyl betaine（CPB）and polyacrylamide（PAM）as foaming agent was prepared to develop foam drainage technology suitable for high sulfur gas well in Northeast Sichuan area. The effect of mass ratio of CPB and PAM on the foaming ability of binary system was studied,and its resistance performance of temperature,hydrogen sulfide and salt,etc was investigated. The results showed that CPB/PAM binary system achieved the best frothing ability with mass ratio of 6∶1. This system had good thermal stability at temperature as high as 175° C. The initial foam height only declined 16.6% after aging. The foaming ability of CPB/PAM binary system was not affected by H2 S partial pressure. The foaming agent exhibited good salt-resistance and liquid carrying capability,which applied to the foam drainage of high sulfur gas well.