Composition and method for recovering hydrocarbon fluids from a subterranean reservoir
US7897546B2 · kind B2 · utility
45Cited by
15References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2009 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | May 27, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/588
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is directed to a composition comprising encapsulated expandable polymeric microparticles including expandable base microparticles encapsulated in a shell of at least one layer of a labile or degradable encapsulation material. The encapsulated microparticles have an unexpanded volume average particle size diameter of from about 0.05 to about 5,000 microns. The invention is further directed to the use of the composition for modifying the permeability of subterranean formations and increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.