Injecting polyelectrolyte based sacrificial agents for use in unconventional formations
US10066157B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Jul 1, 2015 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jul 1, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/267
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compositions and methods for formulating treatment fluids that comprise a surfactant having reduced and delayed adsorption. In one embodiment, the method comprises: introducing a first treatment fluid comprising an aqueous base fluid and a polyelectrolyte into a wellbore penetrating at least a portion of a subterranean formation; contacting at least a portion of the subterranean formation with the polyelectrolyte; and introducing a second treatment fluid comprising an aqueous base fluid and a surfactant into the wellbore penetrating at least the portion of the subterranean formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.