1
Billy G Holmes, Stevan L Weber: Method of recovering oil from heavy oil reservoirs. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, Stanislaus Aksman, December 27, 1988: US04793415 (10 worldwide citation)

A steam flooding method for recovering oil from an underground formation penetrated by an injection and at least one production well is modified by initially lowering the permeability of the lower vertical portion of the formation, e.g., by plugging thereof with gravel sand pack, capped by a plaster ...


2
Stevan L Weber: High sweep efficiency steam drive oil recovery method. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, Charles J Speciale, August 26, 1986: US04607695 (9 worldwide citation)

In a steam flood oil recovery process wherein the oil-containing formation has a natural brine salinity concentration within the range of 10 to 20% by weight, sweep efficiency is improved by injecting steam until steam breakthrough occurs at the production well after which a mixture of steam, a nonc ...