True particle velocity wavefield processing in fiber optics—particle motion sensor hybrid array
AssigneeSchlumberger Technology Corporation
InventorsTakashi Mizuno, Joel Herve Le Calvez
Life of this patent
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Abstract
Systems and methods may be used to reconstruct particle velocity wavefields from coupling-calibrated fiber-optic data that subsequently enables physically valid construction of the particle velocity wavefields for a hybrid sensor array including both fiber-optic and particle motion sensors. These systems and methods may be used in a variety of borehole geophysical applications, such as structure and reservoir imaging, impedance inversion, attenuation tomography, micro-seismic fracture imaging, focal mechanism analysis, and so on. The systems and methods may also be used in other applications such as geothermal and CO2 storage monitoring.
Claims5
A method, comprising:
- receiving fiber sensor data acquired by a plurality of fiber-optic sensors distributed in a borehole;
- receiving particle motion data acquired by a plurality of particle motion sensors distributed in the borehole, wherein a hybrid sensor array comprises the plurality of fiber-optic sensors and the plurality of particle motion sensors;
- estimating calibrated strain data based on the fiber sensor data and the particle motion data;
- estimating first particle velocity data based on the calibrated strain data;
- merging the first particle velocity data and the particle motion data into second particle velocity data;
- processing the second particle velocity data as single-component particle motion data;
- and
- outputting the second particle velocity data as the single-component particle motion data.
Dependencies are inferred from the claim text.