Proper Index of Foam Statics Characteristics on Predicting Foam Dynamics Behavior in Porous Media

摘要

Proper foam statics index can give essential indications on foam dynamic behavior in porous media. In this paper, the statics characteristics are investigated through air-flow method for foam generated with Sodium Dodecyl Sulfate (SDS) surfactant. Parameters of foam height, foam half period time are recorded for various gas phases, surfactant concentrations and injecting gas flow rate, and foam morphology are also visually monitored. It is found the N_2 generated foam has better characteristics on foam height, while poorer characteristics on foam half-time period compared to air and CO_2 foam. Widely employed Foam Composite Index (FC1) is no longer suitable for predicting foam dynamic behavior, a Foam Index for predicting Dynamic Behavior in Porous Media (FIDBPM) is therefore defined to predict properly the foam transient propagation process in porous media.