Application of Debond Technique in Rock Fracture Mechanics

Abstract

Aiming at the fracture mechanics problem of rock material in petroleum engineering, fully illustrated theory of Debond technique is used to simulate and calculate crack propagation in ABAQUS software, and its fracture criterion based on fracture mechanics was introduced. The equivalent domain integral method of calculating stress intensity factor was introduced. The finite element model of rock fracture mechanics of type-I crack was established by Debond technique, and then static stress intensity factor of type-I crack at pure stress boundary condition was simulated and contrasted with analytic solution, which verified the rationality of numerical results. Finally, dynamic stress intensity factor of type-I crack was calculated with increase in loading and crack’s size and accurately predicted the critical stress in the two directions of the simulated rock. The results showed that ABAQUS Debond technique can simulate the fracture mechanics parameters of rock material, and it can effectively describe the fracture mechanics characteristics of rock.

Copyright 2017, Shaanxi Petroleum Society.

This paper was prepared for presentation at the 2017 International Field Exploration and Development Conference in Chengdu, China, 21–22 September 2017.

This paper was selected for presentation by the IFEDC&IPPTC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC&IPPTC Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC&IPPTC Committee, its members. Papers presented at the Conference are subject to publication review by Professional Committee of Petroleum Engineering of Shaanxi Petroleum Society. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC&IPPTC. Contact email: paper@ifedc.org or paper@ipptc.org.