HYDRAULIC FRACTURE SIMULATION WITH AN EXTENDED FINITE ELEMENT METHOD

摘要

A computer-implemented method includes the steps of: defining each position of a first set and a second set of nodes in an enrichment region; and performing a coupled pore fluid diffusion and a stress analysis on the enrichment region at the first set of the nodes. After that, it is determined whether the second set of the nodes is activated (representing a fracture) as the result of the analysis and the results are visually outputted to a user. [Reference numerals] (102) Select an enrichment region;(104) Define an initial mesh of a crack;(106) Start cracking and clarify forwarding standards;(108) Start a new increment;(110) Simulate a concentrated fluid flux in the current increment;(112) Is a crushing standard being satisfied ?;(114) Activate new phantom nodes;(116) Interpret equilibrium equations;(118) Output analysis results;(120) Has the analysis completed ?;(122) End the analysis;(AA,CC) NO;(BB,DD) YES