Reservoir preflushing process for increasing the rate of surfactant transport in displacing oil with injected steam and steam-foaming surfactant
US4597442A · kind A · utility
12Cited by
9References
10Claims
0Family size
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Key dates
| Filing date | Feb 26, 1985 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Feb 26, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a process in which steam and steam-foaming surfactant are injected into a subterranean reservoir having significant cation-exchange capacity, the rate of transport of the steam-foaming surfactant is increased by a prior injection of an aqueous liquid solution of surfactant and monovalent cation salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.