Method of maintaining subterranean formation permeability and inhibiting clay swelling
US5211239A · kind A · utility
11Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Feb 13, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/922
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Moulding and migration of subterranean clay is inhibited during stimulation of the production of hydrocarbon fluids, and preparation therefor, by treating said formations with a compound of the formula (CH.sub.2 .dbd.CH-CH.sub.2).sub.n N+(CH.sub.3).sub.4-n X.sup.- where X may be any anion which does not adversely react with the formation or treatment fluid and n is an integer from 1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.