Determining residual friction reducer concentrations for subterranean treatment fluids
US10442986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2016 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | May 31, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for treating subterranean formations including quantifying additive concentrations. Certain of those methods include; introducing a fluid including an aqueous base fluid and a friction reducer into a wellbore penetrating of a subterranean formation at a pressure sufficient to create or enhance one or more fractures within the subterranean formation; recovering a portion of the fluid from the wellbore; adding a reactive agent to a sample of the portion of the fluid that has been recovered from the wellbore, where the reactive agent reacts with the friction reducer to form a photo-detectable compound in the sample; measuring a light absorbance of the sample at a selected wavelength of light; and using the measured absorbance and a calibration curve for the selected wavelength of light to determine the concentration of the friction reducer in the fluid that has been recovered from the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.