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Foaming agents, despite holding potential in steam injection technology for heavy oil recovery, are still poorly investigated. In this work, we analyzed the performance of the foaming agent NPL-10 in terms of foam height and half-life under various conditions of temperature, pH, salinity, and oil content by orthogonal experiments. The best conditions of use for NPL-10 among those tested are  T =220°C, pH 7, salinity 10000 mg·L –1  and oil content 10 g·L –1 . Thermal decomposition of NPL-10 was also studied by thermogravimetric and differential thermal analyses. NPL-10 decomposes above 220°C, and decomposition is a two-step process. The kinetic triplet (activation energy, kinetic function and pre-exponential factor) and the corresponding rate law were calculated for each step. Steps 1 and 2 follow kinetics of different order ( n  = 2 and ½, respectively). These findings provide some criteria for the selection of foaming agents for oil recovery by steam injection.

Performance and thermal decomposition analysis of foaming agent NPL-10 for use in heavy oil recovery by steam injection