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AssigneeNalco Company
InventorsPious V. Kurian, Kin-Tai Chang, Manian Ramesh
Estimating the term…
The present disclosure is directed to compositions and methods that may be used for enhanced oil recovery, for modifying the permeability of subterranean formations and for increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations. The compositions may include, for example, expandable cross linked polymeric microparticles having an unexpanded volume average particle size diameter of from about 0.05 to about 5,000 microns and a cross linking agent content of from about 100 to about 200,000 ppm of hydrolytically labile silyl ester or silyl ether crosslinkers and from 0 to about 300 ppm of non-labile crosslinkers.
A composition comprising highly cross linked expandable polymeric microparticles having unexpanded volume average particle size diameters of about 0.05 to about 5,000 microns and a cross linking agent content of from 0 to about 300 ppm of non-labile cross linking agents and from about 100 to about 200,000 ppm of labile crosslinking agents, wherein said labile crosslinking agents comprise one or more hydrolytically labile silyl ether or silyl ester crosslinkers.
Dependencies are inferred from the claim text.