Shear dilation using the extended finite element method

Abstract eng:
Microseismic monitoring is a tool used to determine the extent of the fracture network created by underground fracture treatments. Shearing of natural fractures is thought to be the main source of microseismic emissions. Shear dilation models have been implemented using the finite element method and discrete element methods, but not yet in the extended finite element method. In this talk, a two-dimensional model of shear dilation along a natural fracture is implemented in the extended finite element method. The simulations generated will model the formation and propagation of a shear discontinuity along natural fractures and the propagation of the resulting p- and s-waves in the surrounding medium to deepen the understanding of how microseismic emissions are generated.

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