Self-suspending modified proppant system for carbon dioxide based fracturing fluids
US10131833B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 15, 2018 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Mar 15, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/607
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Self-suspending proppants including proppant particles coated with a CO2-philic coating are provided. The CO2-philic coating may be lightly crosslinked and may have a physical structure that constrains CO2 molecules. Methods of making self-suspending proppants may include coating a proppant particle with a polymerizable precursor material of a CO2-philic material and polymerizing the polymerizable precursor material to form a self-suspending proppant are also provided. Additionally, hydraulic fracturing fluids that may include a CO2-based fluid and the self-suspending proppants and methods of treating subterranean formations by contacting a subterranean formation with hydraulic fracturing fluid and propagating at least one subterranean fracture are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.