Xiujuan He

Title: Xiujuan He and Her Work on Acidic-Gas-Responsive Foam Systems.

Introduction

Xiujuan He is a woman inventor based in Shanghai, China. Her work includes a viscoelastic foam system designed to improve recovery in applications involving acidic gas.

Latest Patents

He is associated with 1 patent: “Viscoelastic Foam System for Acidic Gas Switch, and Method and Use for Improving the Recovery Factor Using the Same.” The invention combines a pH-switch surfactant, a hydrocarbyl anionic surfactant, and water. The pH-switch surfactant includes at least one long-chain hydrocarbyl amine.

When the system encounters acidic gas, interaction between the surfactants strengthens, increasing viscosity and producing foam with improved stability and plugging performance. At an injection volume of 1.0 pore volume (PV), the foam formed in a rock core has an apparent viscosity of at least 270 mPa·s and can increase the recovery factor by more than 20%. The long-chain hydrocarbyl amine also improves salt tolerance, extending the system’s applicable mineralization range to 10–200 g/L.

Career Highlights

He is associated with China Petroleum & Chemical Corporation and Sinopec (Shanghai) Research Institute of Petrochemical Technology Co., Ltd. Her patent focuses on improving recovery through a foam system that responds to acidic gas and performs across a broad range of mineralization conditions.

Collaborations

Her listed coworkers include Yingcheng Li and Jun Qiu.

Conclusion

Xiujuan He’s patented foam system combines acidic-gas responsiveness, improved foam stability, and salt tolerance to support enhanced recovery performance.