Mutual solvent system and method for improved oil and gas permeability in high temperature formations
US7906462B2 · kind B2 · utility
10Cited by
14References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Feb 12, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/72
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of acidizing and cleaning up a formation is disclosed, the formation being above 150 degrees C. The formation is treated with a mutual solvent system comprising a mutual solvent of oil and water, an aqueous acid, a corrosion inhibitor, and an iron control agent. In some embodiments, the iron control agent is present in an amount of less than 1% by weight of the mutual solvent system. In some embodiments, the corrosion inhibitor may be present in an amount of less than 10% by weight of the mutual solvent system. In some embodiments, the mutual solvent system further comprises an intensifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.