Sulfomethylated lignite salt as a sacrifical agent in oil recovery processes
US4072192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1976 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Feb 4, 1996 |
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 via the injection well into the formation an aqueous solution of sulfomethylated lignite salt as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may be carried out by first injecting the sulfomethylated lignite salt into the formation through the injection well and following them with either a polymer or a surfactant solution which may also contain sulfomethylated lignite salt. 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.