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Microseismic Event Localization via Least-squares Full Waveform Inversion with Group Sparsity Constraints
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
Summary
Microseismic source localization is posed as a linear inverse problem. A finite difference code that solves the acoustic wave equation in heterogeneous media is utilized to define a forward operator that maps subsurface sources to pressure measurements acquired on the surface of the earth. The inversion process entail inverting the aforementioned operator with the assistance of a group sparsity regularization term that promotes source focusing. By adopting group sparsity, we guarantee the retrieval of a sparse spatial distribution of sources with smooth temporal signatures.
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