Features and imbibition mechanisms of Winsor Ⅰ type surfactant solution in oil-wet porous media

• 作者: CHENG Baoyang FAN Zhen JIANG Hanqiao LI Junjian LIU Rengjing SU Hang XU Fei YU Fuwei
• 来源期刊: 石油勘探与开发:英文版
• 学科: 工学
• 关键词: porous media WETTABILITY WinsorⅠtype SURFACTANT IMBIBITION mechanism enhanced OIL recovery
• 年，卷（期）: 2019,（5）
• 页码范围: 1006-1013
• 页数: 8页
• 分类号: TE357.46

摘要

The relationship between NaCl concentration and the phase change behavior of microemulsion of anionic surfactant was characterized by the salinity scan experiments.The wettability of WinsorⅠtype surfactant solution(WⅠsolution)and the effect of NaCL concentration on phase change behavior of WⅠsolution and imbibition in oil-wet porous media were investigated by microfluidic experiments in this study.The WⅠsolution and WinsorⅠtype microemulsion are similar in wetting phase with stronger wettability than other phases.Two main mechanisms of WⅠsolution enhancing imbibitions recovery in oil wet porous media are the wetting phase drive and residual oil solubilization.Under the salinity condition of WinsorⅠtype microemulsion,the NaCl concentration has strong impact on the imbibition mechanism of WⅠsolution,the higher the NaCl concentration,the complex the imbibition process and the higher the imbibition efficiency will be.The NaCl concentration has strong impact on the solubilization ability to oil of the WⅠsolution,the higher the NaCl concentration,the stronger the solubility of the WⅠsolution to residual oil will be.