Surfactant screening for foam EOR: Correlation between bulk and core-flood experiments

Recent Advances in Surfactant EOR

Adjoint-Based Optimization of a Foam EOR Process

For the nonlinear foam model, extremely small time steps were required in the forward integration to converge to an accurate solution to the semi-discrete (discretized in space, continuous in time) problem. The semi-discrete solution still had strong oscillations in gridblock properties associated with the steep front moving through the reservoir. In addition, an extraordinarily tight tolerance...

Challenges in Adjoint-Based Optimization of a Foam EOR Process

We apply adjoint-based optimization to a Surfactant-Alternating-Gas foam process using a linear foam model introducing gradual changes in gas mobility and a nonlinear foam model giving abrupt changes in gas mobility as function of oil and water saturations and surfactant concentration. For the linear foam model, the objective function is a relatively smooth function of the switching time. For t...

Study of Electrostatic Interaction between Charged Surfactant Vesicles and Ionic Molecules by Bulk and Fluorescence Correlation Spectroscopy Measurements

Title: STUDY OF ELECTROSTATIC INTERACTION BETWEEN CHARGED SURFACTANT VESICLES AND IONIC MOLECULES BY BULK AND FLUORESCENCE CORRELATION SPECTROSCOPY MEASUREMENTS Xiang Wang, Doctor of Philosophy, 2007 Directed By: Professor Douglas S. English Department of Chemistry and Biochemistry Phospholipid vesicles (Liposomes) for controlled release applications such as drug and gene delivery have attracte...

Foaming and foam stability for mixed polymer-surfactant solutions: effects of surfactant type and polymer charge.

Solutions of surfactant-polymer mixtures often exhibit different foaming properties, compared to the solutions of the individual components, due to the strong tendency for formation of polymer-surfactant complexes in the bulk and on the surface of the mixed solutions. A generally shared view in the literature is that electrostatic interactions govern the formation of these complexes, for exampl...