Injection Treatment Simulation using Condensation

摘要

An injection treatment on a subterranean zone is simulated by modeling physically separate rock blocks of the subterranean zone by separate block models. The block model for each physically separate rock block represents intra-block mechanics of the rock block by finite element method. Condensation is performed in the finite element method to reduce nodal degrees of freedom operation on by the finite element method. Interactions between adjacent pairs of the rock blocks are modeled by separate joint models. The joint model for each adjacent pair of rock blocks represents inter-block mechanics between the adjacent rock blocks. The injection treatment of the subterranean zone is simulated with the block models and the joint models.

主权项

1. A computer-implemented method of simulating an injection treatment, the method comprising:
modeling physically separate rock blocks of a subterranean zone by separate block models, the block model for each physically separate rock block representing intra-block mechanics of the rock block by a finite element method and comprising performing condensation in the finite element method to reduce nodal degrees of freedom operated on by the finite element method; modeling interactions between adjacent pairs of the rock blocks by separate joint models, the joint model for each adjacent pair of rock blocks representing inter-block mechanics between the adjacent rock blocks; and simulating, by a data processing apparatus, an injection treatment of the subterranean zone with the block models and the joint models.