04940091 is referenced by 18 patents and cites 20 patents.

A process for closing pores in a heated steam swept zone of a formation having zones of varying permeabilities where a temperature activated aqueous gellable mixture is utilized following a steam flooding or steam stimulation enhanced oil recovery method. After being placed into the steam swept zone having varying permeabilities, a temperature above 300.degree. F. activates components in the gellable mixture which causes a solid gel to form which closes pores in the steam swept zone. A spacer volume of cold water is pumped into the formation to remove any ungelled mixture. Steam is directed into an unswept zone and hydrocarbonaceous fluids recovered therefrom. Polymers utilized include polyvinyl alcohol and polyacrylamide cross-linked with phenol and an aldehyde producing compound sufficient to form a phenolic resin in situ.

Title
Method for selectively plugging a zone having varying permeabilities with a temperature activated gel
Application Number
7/292795
Publication Number
4940091
Application Date
January 3, 1989
Publication Date
July 10, 1990
Inventor
Winston R Shu
Dallas
TX, US
Paul Shu
West Windsor
NJ, US
Agent
Charles A Malone
Charles J Speciale
Alexander J McKillop
Assignee
Mobil Oil Corporation
NY, US
IPC
E21B 33/138
E21B 43/24
E21B 43/22
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