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Analysis and Separation of Surface and Body Waves in Onshore-seismic Dual Fields
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 75th EAGE Conference & Exhibition - Workshops, Jun 2013, cp-349-00064
- ISBN: 978-90-73834-49-1
Abstract
Dual-field seismic data are achieved recording particle velocity and pressure/stress at a same receiver-device location. The dual-field method makes it possible to separate different components of the propagating wavefields activated by a single source. We analyze the results of an onshore seismic application using dual-field measurements in the shallow ground. We acquired the seismic data by reciprocal source-receiver geometry that makes it possible to limit the number of dual-receivers installations and to record dual-field data by a source activated along a seismic line. The data obtained by shallow stress sensors buried in the ground and surface geophone are studied for the characterization of vertically propagating body waves, and of surface waves propagating in the horizontal direction with amplitude decaying in depth. The analysis shows that the surface and body waves can be separated combining the dual signals without needing of multi-dimensional processing. This technique may represent a new approach useful for wavefield analysis in near-surface applications, and not only, easily achievable with reciprocal geometry in shallow seismic acquisition surveys.