Improved SAGD Process

Quoc P. Nguyen

The current state of the art in steam flooding, SAGD, and cyclic steam stimulation suffers from inherent geological heterogeneity and poor solvent mass transfer, frequently leading to high operating costs and poor sweep efficiency.

 For instance, an aqueous film with impure surfaces imposes a significant resistance to the gas diffusion (see figure). To overcome these issues, the subobjectives of this project are to (1) develop novel solvents and additives to enhance solvent mass transfer through the condensed-water front around the steam chamber, (2) obtain a pore-scale coupled thermal and mass transfer model as a first step towards upscaling of the new processes, (3) reduce heat loss to overburden, (4) improve diversion techniques.