Composition and method for recovering hydrocarbon fluids from a subterranean reservoir
US9120965B2 · kind B2 · utility
12Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2012 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Nov 6, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/164
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition comprising crosslinked expandable polymeric microparticles capable of hydrolysis at or below neutral pH and a method of modifying the permeability to water of a subterranean formation by introducing such compositions into the subterranean formation is disclosed and claimed. This invention further relates to compositions and methods for the recovery of hydrocarbon fluids from a subterranean reservoir or formation subjected to CO2 or CO2 Water Alternating Gas flooding at low pH and increases the mobilization and/or recovery rate of hydrocarbon fluids present in the subterranean formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.