none 10.1190/tle36120987.1 Society of Exploration Geophysicists Society of Exploration Geophysicists 186 94516066 5980 2025120815045628100 10.1190 2025-12-08T20:05:06Z 2017-11-28T12:46:06Z 46 The Leading Edge 1070-485X 12 2017 12 01 2017 36 12 Xiang Wu 1 Halliburton. Mark E. Willis 1 Halliburton. William Palacios 1 Halliburton. Andreas Ellmauthaler 1 Halliburton. Oscar Barrios 1 Halliburton. Simon Shaw 1 Halliburton. Dan Quinn 1 Halliburton. Abstract Understanding the strengths and limitations of rapidly advancing distributed acoustic sensing (DAS) technology used for recording vertical seismic profile (VSP) data is achieved by comparing DAS and geophone data sets using both compressional-wave (P-wave) and shear-wave (S-wave) VSP data and their corresponding geophysical answer products. We validate the kinematics (time) and dynamics (amplitude) of DAS VSP data by examining the extracted slowness values, response-to-incident angles, corridor stacks, and common-depth-point (CDP) transforms. For kinematics validation, the slowness values computed from P- and S-wave components of DAS VSP data agree with the geophone slowness values. For dynamics validation, we confirm the cos2θ response of the fiber to the incident angle of the seismic wavefield for P-waves and sin 2θ for S-waves. The amplitudes of the P-wave corridor stacks are comparable; the S-wave corridor stacks are similar for shallow events and differ for later events due to the limited response of the fiber to S-waves at near-vertical angles of incidence. High-quality CDP transform images are obtained for P- and S-waves. These analyses indicate that properly acquired DAS VSP data sets are reliable for the kinetics and dynamics of both P- and S-waves. Once the fiber-optic cable is installed in the well, VSP acquisition costs are greatly reduced because DAS data may be acquired with no additional well intervention. The extensive spatial coverage obtained using fiber-optic cables, the ease of acquiring time-lapse (4D) VSP data, and the reliability of the resulting DAS VSP data sets are making DAS technology an extremely important VSP acquisition tool. 12 2017 12 01 2017 987 993 1 10.1190/crossmark-policy library.seg.org true 2017-11-28 10.1190/tle36120987.1 https://pubs.geoscienceworld.org/tle/article/36/12/987/522824/Compressional-and-shear-wave-studies-of https://pubs.geoscienceworld.org/seg/tle/article-pdf/36/12/987/7439566/tle36120987.1.pdf https://pubs.geoscienceworld.org/seg/tle/article-pdf/36/12/987/7439566/tle36120987.1.pdf https://pubs.geoscienceworld.org/tle/article/36/12/987/522824/compressional-and-shear-wave-studies-of Geophysical Prospecting 62 4 679 2014 10.1111/1365-2478.12116 Distributed acoustic sensing for reservoir monitoring with vertical seismic profiling Lab and field based calibration of DAS VSP data: Presented at SEG DAS Workshop 2015 Calibration of distributed acoustic sensing (DAS) VSP data 2016 The Leading Edge 35 7 605 2016 10.1190/tle35070605.1 Quantitative quality of distributed acoustic sensing vertical seismic profile data Combined use of P and S DAS VSP data: Presented at the SEG Workshop Fiber-Optic Sensing for Exploration and Monitoring: Developments, Applications, and Challenges 2016