Ultra-dry three-phase flue gas foam for oil-gas fields and preparation method thereof

US10793763B2 · kind B2 · utility

Assignee

• China University of Petroleum—Beijing · CN

Inventors

• Qichao Lv · Beijing, CN
• Wenqi Shao · Wuhai, CN
• Juan Zhang · San Diego, US
• Zhaoxia Dong · Beijing, CN
• Meiqin Lin · Beijing, CN
• Zihao Yang · Santa Clara, US
• Yang Liu · Shanghai, CN
• Rong Zheng · San Jose, US

Key dates

• Filing date: Nov 18, 2019
• Grant date: Oct 6, 2020
• Expiry date: Nov 18, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The disclosure discloses an ultra-dry three-phase flue gas foam for oil-gas fields and preparation method thereof. The ultra-dry three-phase flue gas foam is produced by a gas phase, a liquid phase and a solid phase; the gas phase is a flue gas; the foaming solution is an aqueous solution of a surfactant, a pH adjuster, and an inorganic salt; the solid phase is a composite of fly ash and nano silica; the foam quality is 90%-99%. The solid phase foam stabilizer is a compounded system of fly ash particles and nano silica particles, which is not only low in cost but also can form a stable solid particle adsorption layer on the foam film. Thus the instability of the foam such as film rupture, gas diffusion and bubble aggregation can be greatly reduced, and the stability of the foam can be effectively improved.