Compositions for enhanced oil recovery
US11168244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2017 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Oct 24, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/32
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein are compositions and methods for increasing recovery, or flowback, of hydrocarbon compounds from hydrocarbon-containing subterranean reservoirs. The flowback compositions include an anionic sulfonated surfactant, an amphoteric surfactant, water, and a coupling agent. The flowback compositions convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The flowback compositions do not cause formation of emulsions with hydrocarbon compounds within the subterranean environment. The flowback compositions are particularly useful for increasing the yield of hydrocarbons recovered from tight shale reservoirs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.