25/05/2026
𝐈𝐦𝐩𝐫𝐨𝐯𝐞𝐝 𝐝𝐨𝐰𝐧𝐡𝐨𝐥𝐞 𝐬𝐞𝐢𝐬𝐦𝐢𝐜 𝐝𝐚𝐭𝐚 𝐩𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐬𝐞𝐢𝐬𝐦𝐢𝐜 𝐚𝐭𝐭𝐫𝐢𝐛𝐮𝐭𝐞𝐬 𝐚𝐧𝐝 𝐣𝐨𝐢𝐧𝐭 𝐚𝐧𝐚𝐥𝐲𝐬𝐢𝐬 𝐰𝐢𝐭𝐡 𝐇𝐕𝐒𝐑: 𝐞𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐭𝐫𝐚𝐜𝐞 𝐢𝐧𝐭𝐞𝐫𝐩𝐫𝐞𝐭𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐚𝐧𝐝 𝐞𝐱𝐭𝐞𝐧𝐝𝐞𝐝 𝐢𝐧𝐯𝐞𝐬𝐭𝐢𝐠𝐚𝐭𝐢𝐨𝐧 𝐝𝐞𝐩𝐭𝐡
Dal Moro, G.
𝘚𝘰𝘪𝘭 𝘋𝘺𝘯𝘢𝘮𝘪𝘤𝘴 𝘢𝘯𝘥 𝘌𝘢𝘳𝘵𝘩𝘲𝘶𝘢𝘬𝘦 𝘌𝘯𝘨𝘪𝘯𝘦𝘦𝘳𝘪𝘯𝘨
Volume 208, 2026
https://doi.org/10.1016/j.soildyn.2026.110306.
(https://www.sciencedirect.com/science/article/pii/S0267726126002186)
𝐀𝐛𝐬𝐭𝐫𝐚𝐜𝐭: Downhole (DH) seismics is a popular technique for estimating compressional (P) and shear (SH) wave velocities by analysing multi-component data recorded by a borehole geophone in response to a seismic source at the surface. Although often regarded as a straightforward geotechnical text providing accurate and unambiguous subsurface models, the interpretation of DH data can be significantly complicated by complex seismic-wave propagation and scattering phenomena, which may lead to misidentification of phase arrivals and, consequently, to inaccurate velocity estimates. To improve the recognition of shear-wave arrivals, we propose the integration of instantaneous seismic attributes into DH data processing. In particular, instantaneous amplitude and sweetness significantly enhance SH-wave identification, whereas P-wave arrivals are usually identifiable directly from the raw data and do not require additional processing. Furthermore, to better constrain the subsurface shear-wave velocity profile down to the borehole depth and extend it beneath it, a joint analysis is performed combining DH body-wave travel times with Horizontal-to-Vertical Spectral Ratio measurements acquired near the borehole. The study adopts a data-driven approach, and the proposed workflow is illustrated through a field case study, demonstrating its ability to enhance the identification of shear-wave arrivals and to provide a reliable Vs profile well below the borehole depth.
Keywords: Downhole seismics; Horizontal-to-Vertical Spectral Ratio (HVSR); Seismic attributes; Joint analysis; Soil Classification; Vs30
https://www.sciencedirect.com/science/article/abs/pii/S0267726126002186?DGCID=STMJ_220042_AUTH_SERV_PPUB&lid=rcjae1x11dvv&utm_campaign=STMJ_220042_AUTH_SERV_PPUB&utm_content=07bab9e4-c31e-408b-afa5-1c9ca0f269ca&utm_medium=email&utm_source=braze&utm_term=07bab9e4-c31e-408b-afa5-1c9ca0f269ca
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