Simulation of seismic wave propagation through fracture has a wide range of applications in environmental sciences. In this article, we propose an efficient tool to compute accurate seismic response from a fracture within a reasonable time frame. Its theoretical formulation is based on the spectral element method (SEM) and extended to Schoenberg’s linear slip model (LSM). SEM is very effective in terms of accuracy and stability criteria. LSM is treated as a boundary condition and perfectly fits for modelling fractures with a small aperture. The method is implemented for 3D heterogeneous media on GPU, which allows calculating the tasks with large and complex geometries. We applied the method to the task that illustrates the possibility of the proposed solution to handle real problems. We model sonic logging for a well with a micro-fracture in a cement sheath. Based on synthetic seismograms, strong connections between wave mode parameters and the fracture parameters were established. This task is of high importance for carbon capture and storage, as microfracutres provide the path for long-term CO2 migration.
Presentation Date: Wednesday, October 14, 2020
Session Start Time: 9:20 AM
Presentation Time: 9:45 AM
Location: Poster Station 9
Presentation Type: Poster