Alkoxylated asphalts as sacrificial agents in oil recovery processes
US3978927A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Sep 10, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting into the formation via the injection well an aqueous solution of ethoxylated asphalts as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. Normally the process would be carried out by first injecting the ethoxylated asphalts into the formation through the injection well and following them with either a polymer or a surfactant solution. The polymer and/or surfactant would then be followed by a drive fluid such as water to push the chemicals to the production well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.