04526695 is referenced by 169 patents and cites 5 patents.

The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.

Title
Composition for reducing the permeability of subterranean formations
Application Number
291200
Publication Number
4526695
Application Date
February 4, 1983
Publication Date
July 2, 1985
Inventor
Michael M Epstein
Columbus
OH, US
Richard G Sinclair
Columbus
OH, US
Claude E Cooke Jr
Houston
TX, US
Steven R Erbstoesser
Missouri City
TX, US
Agent
Marc L Delflache
James J Riley Jr
Assignee
Exxon Production Research Co
TX, US
IPC
E21B 33/138
View Original Source