Publications

You can also find my articles/abstracts at Google Scholar.

DAS observations and modeling of perforation-induced guided waves in a shale reservoir

Published in The Leading Edge, 2019

Perforation shots conducted in unconventional reservoirs excite guided waves that propagate through the low-velocity shale formation. These waves are recorded by a downhole DAS array and have a wide frequency content. In a cross-well acquisition, guided S-waves are disturbed when propagating through previously stimulated areas.

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Q-factor inversion using reconstructed source spectral consistency

Published in Geophysics, 2018

We utilize a physical objective function for Q-factor inversion. Assuming correct velocity and attenuation models, back-propagation of recorded data should have the same spectral content at the source location. This property is used in a global optimization scheme, allowing for high-resolution Q-model recovery.

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Seismic velocity estimation using time-reversal focusing

Published in Geophysics, 2018

We utilize the time-reversal principle for seismic velocity inversion. Recorded data are computationally back-propagated through various velocity models. When the model is correct, energy will be focused at the true source location and origin time.

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Shallow diffraction imaging in an SH-wave crosshole configuration

Published in Geophysics, 2017

We show the advantages of using a pure SH-waves cross-hole acquisition for diffraction imaging. After implementing an automatic model-based direct-waves muting, we migrate diffracted events to a depth imaging offset domain. In it, gathers will be flat only if estimated diffractor location and velocity model are correct.

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Usage of directional common image gathers for shallow seismic source localization

Published in Near Surface Geophysics, 2016

In this paper, we explore using multi-parameter common image gathers (MPCIGs) as a tool for event location. When both estimated event location and used velocity model are correct, the MPCIGs will have no residual moveout. We explore the usage of such gathers for a one-way migration, with unknown source location and origin time.

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