CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING
发明人:
JU, Yang,LIU, Peng,LIU, Hongbin,YANG, Yongming
申请号：
WO2018CN83339
公开号：
WO2018192481(A1)
申请日:
2018.04.17
申请国别(地区):
世界知识产权组织国际局
年份:
2018
代理人:
摘要：
A method for measuring stress field variations during a CO2 fracturing process. The method employs CT scan, digital reconstruction, 3D printing, CO2 fracturing experiments, stress freezing and photoelasticity measuring techniques, not only allows the transparent display of the spatial distribution and the form of extension of internal cracks of a three-dimensional physical model when fractured, but also acquires a three-dimensional stress phase diagram of the interior of the model during a fracture crack extension process, thus implementing the transparent display and quantitative expression of a three-dimensional stress field and an evolutionary rhythm thereof in a solid CO2 fracturing process; and, at the same time, utilizes multiple identical transparent three-dimensional physical models to implement the display and expression, thus ensuring the accuracy and reliability of a measurement result, and solving the problem of low calculation precision and difficulty in ensuring accuracy and reliability found in
