Method for single-stage treatment of siliceous subterranean formations
US8316941B2 · kind B2 · utility
6Cited by
10References
16Claims
0Family size
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Key dates
| Filing date | Mar 24, 2008 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Apr 7, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/74
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a method of treating a sandstone-containing formation penetrated by a wellbore, a treatment fluid comprising an aqueous fluid containing a Bronsted acid, a hydrogen fluoride source and an organic acid or salt thereof that is substantially soluble in the aqueous fluid is formed. The treatment fluid contains less than about 2% of fluoride (F−) by weight of the fluid and from 2% or less of sodium (Na+) by weight of the fluid. The treatment fluid is introduced into the formation through the wellbore as a single-stage without introducing an acid-containing fluid preflush into the formation prior to introducing the treatment fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.