Calculation of Wellbore Fracture Pressure Under Multi Field Coupling Based on M-Integral of Configuration Mechanics.
- Resource Type
- Article
- Authors
- Wang, Liang; Wang, Ping; Huang, Hai; Qu, Zhan; Feng, Haowei; Wei, Yongcheng; He, Yawen
- Source
- Chemistry & Technology of Fuels & Oils. Sep2023, Vol. 59 Issue 4, p800-811. 12p.
- Subject
- *CONTINUUM damage mechanics
*MATHEMATICAL continuum
*FRACTURE mechanics
- Language
- ISSN
- 0009-3092
This paper proposes a new idea and method which is to use configuration mechanics to describe the evolution of complex microstructures and multiple defects such as discontinuity, heterogeneity and anisotropy in the borehole rock under the coupling of mechanics and chemistry. It is used to deal with the evolution of complex microstructures and multiple defects in the borehole rock that are difficult to deal with in the traditional fracture mechanics and damage mechanics of the continuum theory. The two-dimensional/three-dimensional M-integral is numerically calculated using the domain integration method, and the material failure criterion based on configuration force and conservation integral is used to calculate the shale lining fracture pressure. The results show that the calculation results can better predict the fracture pressure. It shows that the established multi-field coupling borehole rupture pressure model based on the M-integral of configuration mechanics can provide a theoretical reference for the complex formation stability under multi-field coupling and the wellbore stability control during field operations. [ABSTRACT FROM AUTHOR]