Moment tensor inversion of perforation shots using distributed acoustic sensing
Abstract
Distributed acoustic sensing (DAS) fibers have enabled various geophysical applications in unconventional reservoirs. Combined with perforation shots, a DAS fiber can record valuable guided waves that propagate in the reservoir formation and carry information about its properties. However, the representation of perforation shots as seismic sources, needed to conduct quantitative analysis, remains unknown. We model such sources using a superposition of three mechanisms for which we derive the moment tensor representation. Using field DAS data recorded in the same well where the perforations are located, we establish a workflow to invert the resolvable components of the total moment tensor for 100 different perforation shots. By scrutinizing the inversion results, we conjecture that the moment tensor can indicate how effectively a perforation shot creates micro-cracks in the surrounding rock. Furthermore, our inverted moment tensors form the basis for a subsequent elastic full-waveform inversion.
Cite
@article{arxiv.2303.07260,
title = {Moment tensor inversion of perforation shots using distributed acoustic sensing},
author = {Milad Bader and Robert G. Clapp and Kurt T. Nihei and Biondo Biondi},
journal= {arXiv preprint arXiv:2303.07260},
year = {2023}
}
Comments
This work has been submitted for publication in Geophysics under the reference GEO-2023-0040