Stabilizing emulsified acids for carbonate acidizing
US8551926B2 · kind B2 · utility
50Cited by
12References
13Claims
0Family size
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Key dates
| Filing date | Feb 28, 2013 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Feb 28, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Emulsified acids have been used to increase production rates of oil and gas in carbonate reservoirs through acid fracturing and matrix acidizing operations. An emulsifier is used to emulsify the aqueous acid with an oil, usually diesel. Very small particles, such as colloidal clay particles and/or nanoparticles increase the stability of the emulsified acids over an elevated temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.