Sand consolidation methods
US5199492A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Sep 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5755
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods are provided for consolidating unconsolidated mineral grains such as sand within a subterranean oil formation to form a fluid permeable barrier which restrains the movement of sand particles when oil passes through the barrier. A quantity of an organic solvent, preferably an ester such as butyl acetate is injected into the formation as a preflush. Next, a liquid comprising a polymerizable oligomer such as furfuryl alcohol oligomer, an ester such as butyl acetate, and an acid catalyst such as toluene sulfonic acid is provided, then mixed with a noncondensable gas to form a multiphase or aerosol treating fluid, and the treating fluid is injected into the formation to be consolidated. The well is shut in for sufficient period of time for polymerization to convert the injected fluids into a permeable barrier around the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.