Compositions and methods for the removal of oil-based filtercakes
US7906464B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | May 13, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/74
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of servicing a wellbore comprising providing a composition comprising a mutual solvent precursor, an acid precursor, and an aqueous fluid, and contacting the composition with oil wet solids in the wellbore. A method of servicing a wellbore comprising introducing an oil-based fluid into a wellbore, wherein the oil-based fluid forms oil wet solids in the wellbore, contacting the oil wet solids in the wellbore with a composition comprising a mutual solvent precursor; an acid precursor and an aqueous fluid, and allowing the oil wet solids to become water wet. A method of servicing a well bore comprising contacting a composition comprising a formate ester with oil wet solids in the well bore under conditions wherein the formate ester hydrolyzes to release formic acid, wherein the formic acid catalyzes the hydrolysis of additional formate ester, and wherein all or a portion of the formate ester converts at least a portion of the oil-wet solids to water-wet solids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.