Summary

We describe an inversion for the moment tensor valid for general anisotropic media, demonstrated using Green functions from a layered VTI ray tracer. The moment tensor is decomposed so as to remove the distortions due to anisotropy local to the source and a new 3D graphical representation is introduced for intuitive visualization. The workflow for real data is reviewed on a dual well monitoring job from the West Pembina field in Alberta. Included is the important step of VTI model calibration where the layered model may be tilted. Multi-stage results are qualified using a posterior uncertainty metric; interpretation of the results is ongoing.

Keywords:
vector, tensor, reservoir characterization, anisotropy, mechanism, displacement, tensor inversion, chapman, potency tensor, source parameter
Subjects:
Reservoir Characterization, Seismic processing and interpretation
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2014. Society of Exploration Geophysicists
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