Method for measuring stress field variations during CO2 fracturing process

US10564080B2 · kind B2 · utility

Assignee

• China University of Mining and Technology-Beijing · CN

Inventors

• Yang Ju · Chengdu, CN
• Peng Liu · Beijing, CN
• Hongbin Liu · Beijing, CN
• Yongming Yang · Beijing, CN

Key dates

• Filing date: Apr 17, 2018
• Grant date: Feb 18, 2020
• Expiry date: Apr 17, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2203/0256
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for measuring a stress field evolution during a CO2 fracturing process is provided, which is adopted to not only transparently display the spatial distribution and propagation morphology of internal fracturing fracture of a three-dimensional physical models, but also obtain internal three-dimensional stress phase diagram in a fracture propagation process by integration of a CT scanning, a digital reconstruction, a 3D printing, a CO2 fracturing experiment, a stress freezing and a photoelastic measurement techniques, thereby realizing transparent display and quantitative characterization of the three-dimensional stress field and its evolution law of a solid matter in the CO2 fracturing process.