Modeling Non-aqueous Phase Liquid Displacement Process

• 作 者: Yang Zhenqing Shao Changjin Zhou Guanggang Qiu Chao
• 机 构: Physics Department, China University of Petroleum, Beijing 102249, China
• 出 处: 石油科学（英文版）
• 发表日期: 2007年3期
• 关键词: Non-aqueous phase liquid pore-network model capillary pressure relative permeabi

A pore-network model physically based on pore level multiphase flow was used to study the water-non-aqueous phase liquid (NAPL) displacement process, especially the effects of wettability, water-NAPL interfacial tension, the fraction of NAPL-wet pores, and initial water saturation on the displacement. The computed data show that with the wettability of the mineral surfaces changing from strongly water-wet to NAPL-wet, capillary pressure and the NAPL relative permeability gradually decrease, while water-NAPL interfacial tension has little effect on water relative permeability, but initial water saturation has a strong effect on water and NAPL relative permeabilities. The analytical results may help to understand the micro-structure displacement process of non-aqueous phase liquid and to provide the theoretical basis for controlling NAPL migration.