Methods and compositions for use with spacer fluids used in subterranean well bores
US7207387B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2004 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Jul 12, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/928
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to spacer fluids used in subterranean operations and, more particularly, to spacer fluids that comprise water-soluble relative permeability modifiers and methods of using the spacer fluids in subterranean operations. In one embodiment, the present invention provides a method of displacing a first fluid from a well bore that comprises introducing the first fluid into the well bore; and displacing the first fluid with a spacer fluid, the spacer fluid comprising water, and a water-soluble relative permeability modifier comprising a hydrophobically modified polymer or a hydrophilically modified polymer. In another embodiment, the present invention provides a spacer fluid that comprises water, and a water-soluble relative permeability modifier comprising a hydrophobically modified polymer or a hydrophilically modified polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.