An Analytical Model of Foam Resistance Factor in Gas Foam Flooding

作者：Jiali Zang, Xiangfang Li, Zhiming Chen, Liang Huang, Yanzun Li, Yanick Telphi · 发表于：SPE Nigeria Annual International Conference and Exhibition · 年份：2015 · DOI：10.2118/178339-ms · 被引用次数：8 · 研究领域：Enhanced Oil Recovery Techniques、Hydrocarbon exploration and reservoir analysis、Hydraulic Fracturing and Reservoir Analysis

Abstract Gas foam flooding is an effective technique to improve recovery and it has been successfully applied in some low permeability oil reservoirs. Among all parameters, foam resistance factor is regarded as an important index to evaluate the gas shutoff and water shutoff capacity of foam system. Until now, Foam Resistance Factor is normally obtained through solving the nonlinear regression equation based on laboratory foam flow experiment. The empirical formulas obtained through this method have low accuracy, limited application range and no repeatability. In this study, we used the fractional flow theory to analyse the liquid and gas distribution and established a formula of solving water saturation in function of gas liquid ratio, connate water saturation and flowing gas fraction when foam flow is at steady-state. Then foam resistance factor prediction model was approached in absence of oil based on empirical and population-balance foam models which were employed to modify gas relative permeability and gas viscosity. Analytical method was proposed to estimate critical parameters, such as fmmob, Xf and FM, for model solution. A case was designed for illustrating detailed solution procedure. In the end, comparison between calculation FM data and simulation FM data were performed indicating a relatively good match.