04607695 is referenced by 9 patents and cites 4 patents.

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 noncondensible gas, and a surfactant comprising a C.sub.12 alpha olefin sulfonate is injected into the formation. The C.sub.12 alpha olefin sulfonate forms a stable foam with the formation oil at formation conditions that reduces the permeability of the highly permeable steam swept zones thereby diverting the steam to other portions of the formation containing unswept oil. If the formation does not contain a natural brine salinity concentration, then the salinity of the mixture of steam, noncondensible and surfactant is controlled to a concentration of about 10% by weight by adding a salt thereto.

Title
High sweep efficiency steam drive oil recovery method
Application Number
6/580926
Publication Number
4607695
Application Date
February 16, 1984
Publication Date
August 26, 1986
Inventor
Stevan L Weber
Allen
TX, US
Agent
Charles J Speciale
Michael G Gilman
Alexander J McKillop
Assignee
Mobil Oil Corporation
NY, US
IPC
E21B 43/24
View Original Source