公开(公告)号：US11702585B2

公开(公告)日：2023-07-18

申请号：US17900822

申请日：2022-08-31

Applicant: Southwest Petroleum University

Inventor： Daijun Du ,  Huancai Fan ,  Wanfen Pu ,  Rui Liu ,  Fayang Jin ,  Lin Sun ,  Binyang Zou ,  Bowen Chen

IPC: C09K8/588 ,  C09K8/594

CPC classification number: C09K8/588 ,  C09K8/594 ,  C09K2208/10

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.