Tight oil reservoir CO2 flooding multi-scale channeling control system and preparation method
US11702585B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2022 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Aug 31, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/70
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A tight oil reservoir CO2 flooding multi-scale channeling control system and a preparation method, including nanoscale CO2 responsive worm-like micellar systems and micron-scale CO2 responsive dispersion gel, are provided. The nanoscale CO2 responsive worm-like micelle system is prepared by CO2 reactive monomers and organic anti-ion monomers stirred in water. The micron-scale CO2 responsive dispersion gel is made of acrylamide, a responsive monomer, a silane coupling agent modified hydroxylated multi-walled carbon nanotubes as raw materials, cross-linked in water. The tight oil reservoir CO2 multi-scale channel control system, has strong flow control ability during CO2 displacement, and high-strength carbon nanotubes are introduced into the micro-scale CO2 responsive dispersion gel, which effectively improves the strength and long-term stability of the dispersion gel, significantly enhances the sealing effect on cracks, and after displacement of the CO2 of the system, the worm-like micelles revert to spherical micelles with good responsive reversibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.