Twenty months of continuous DAS-SOV direct wave signatures

Full description

Data description: wavelets (direct wave signatures) are generated from the first 300 vintages covering twenty months of continuous DAS-SOV data. The raw shot records are produced by deconvolving DAS seismograms with the source sweeps recorded at the near-field geophones and then by vertically stacking each rotation daily. Yavuz et al. (2021) discussed this method in detail. To estimate the direct wave signatures, we choose a set of deep traces for each well-source pair. These traces are deep enough (~1km), so primary energy (PP) or any other seismic energy does not interfere with the direct arrivals but are shallower than the reservoir depth (~1.5km). To improve the signal-to-noise in this estimation, selected traces are flattened along the first breaks before summation. Yavuz, S., Isaenkov, R., Pevzner, R., Gurevich, B., Tertyshnikov, K., Yurikov, A., Correa, J., Wood, T., & Freifeld, B. (2021). Processing of multi-well offset vertical seismic profile data acquired with distributed acoustic sensors and surface orbital vibrators: Stage 3 of the CO2CRC Otway Project case study. Geophysical Prospecting, Volume 69, Issue 8-9, Pages 1664-1677. https://doi.org/10.1111/1365-2478.13141 Data collection time details: Number of files/types: 4,379 Files in sgy format, 5 matlab files in m format Special software required to open files: generic seismic data display software and matlab Geographic information (if relevant): Australia, Otway international test centre Keywords: distributed acoustic sensing, surface orbital vibrators, direct wave signature