Interpretation: SEG 3 (3):SW27-SW35 (2015)
AbstractWe have analyzed vertical seismic profile data acquired across a Marcellus Shale prospect and found that SV-P reflections could be extracted from far-offset VSP data generated by a vertical-vibrator source using time-variant receiver rotations. Optimal receiver rotation angles were determined by a dynamic steering of geophones to the time-varying approach directions of upgoing SV-P reflections. These SV-P reflections were then imaged using a VSP common-depth-point transformation based on ray tracing. Comparisons of our SV-P image with P-P and P-SV images derived from the same offset VSP data found that for deep targets, SV-P data created an image that extended farther from the receiver well than P-P and P-SV images and that spanned a wider offset range than P-P and P-SV images do. A comparison of our VSP SV-P image with a surface-based P-SV profile that traversed the VSP well demonstrated that SV-P data were equivalent to P-SV data for characterizing geology and that a VSP-derived SV-P image could be used to calibrate surface-recorded SV-P data that were generated by P-wave sources.
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References found in this work
Generating Direct-S Modes with Simple, Low-Cost, Widely Available Seismic Sources.Bob A. Hardage & Donald Wagner - 2014 - Interpretation: SEG 2 (2):SE1-SE15.
SV-P: An Ignored Seismic Mode That has Great Value for Interpreters.Bob A. Hardage, Diana Sava & Don Wagner - 2014 - Interpretation: SEG 2 (2):SE17-SE27.
Application of 3C/3D Converted Mode Reflections, King County, Texas.Michael V. DeAngelo & Bob A. Hardage - 2014 - Interpretation: SEG 2 (2):SE39-SE45.
Citations of this work
Determining Fast-S and Slow-S Propagation Directions with SV-P Data Produced by Buried Explosives and Recorded with Vertical Geophones.Bob Hardage, Mike Graul, Tim Hall, Chris Hall, Mark Kelley, Valerie Smith & Allen Modroo - 2021 - Interpretation 9 (2):T599-T609.
Estimating SHmax Azimuth with P Sources and Vertical Geophones: Use P-P Reflection Amplitudes or Use SV-P Reflection Times?Bob Hardage, Mike Graul, Tim Hall, Chris Hall, Mark Kelley, Valerie Smith & Allen Modroo - 2022 - Interpretation 10 (2):T253-T264.
SV-P: A Potential Viable Alternative to Mode-Converted P-SV Seismic Data for Reservoir Characterization.Menal Gupta & Bob Hardage - 2017 - Interpretation: SEG 5 (4):T579-T589.
Fabric and Internal Architecture of Permian Basin Turbidites Indicated by Unsupervised Machine Learning Analysis of P-P and SV-P Images.Bob Hardage, Thomas Smith, Diana Sava, Yi Wang, Rocky Roden & Gary Jones - 2020 - Interpretation 8 (4):SV1-SV15.
Stress Analysis Using Direct-S Wavelets Produced by a Vertical Vibrator.Bob A. Hardage, Richard Van Dok & Mark Kelley - 2021 - Interpretation 9 (3):T781-T790.
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