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Keywords: vsp data
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Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594957
... obtained from well logs is responsible for major 9) Trend application to inverted impedance from VSP uncertainties in velocity estimates and related pore-pressure predictions. We applied this workflow in two cases: for VSP data above 185m and full VSP data (above 295m). The resulted Nivlet et al., (2020...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3416678
... fracture height and density from time-lapse DAS VSP data. We model P-wave time delays due to induced vertical fracture sets as horizontal transverse isotropic (HTI) zones, and we use rock physics to relate seismic anisotropy to fracture properties. An inversion of P-wave time delays can then recover...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3423715
... We analyze zero offset and walkaway VSP data acquired using a hybrid wireline and DAS system from a deep-water exploration well. The comparisons show that the DAS data, whilst of lower sensitivity are enough to provide good quality commercial products. The greater depth aperture afforded...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427091
... studied for surface seismic data in academic research, but it is never reported with application to VSP data. We fill this gap by applying LSERTM to VSP data with a simple layered model, and analyze the behavior of the subsurface offset common image gathers (SOCIGs) and the angle domain common image...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426539
... to separate P/S waves. This method employs a multi-task neural network that extracts P- and S-potential simultaneously from multi-component VSP data. Targeting at a specific testing dataset, we derive an efficient building strategy to construct training datasets. Synthetic data experiment shows NN trained...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215934
... ABSTRACT A robust joint seismic migration method for vertical seismic profile (VSP) data is presented. The joint imaging method is based on the inverse generalized Radon transform (GRT) algorithm and can handle the migration of the primary and free surface-related multiple reflections...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215957
... ABSTRACT Sonic anisotropy is integrated with multi-offset hybrid cable DAS VSP data to build and calibrate VTI models with different scales. Microseismic, seismic reflection and imaging scale models are produced. The initial VTI model from sonic anisotropy is cross-validated against...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3206719
... velocity and flat structures. We propose a new P-wave reconstruction method based on VSP data, aiming to learn the domain transformation directly from full waveform elastic VSP data to their P-wave components. This method is based on optimal transportation theory and implemented by Generative Adversarial...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216443
... ABSTRACT Estimating based on downgoing waves in VSP data can be challenging when scattered waves from near-borehole velocity/density anomalies interfere constructively and destructively with the direct arrivals. The wavefield interference leads to modulations in amplitude spectra...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216776
... Start Time: 1:50 PM Presentation Start Time: 3:05 PM Location: 301B Presentation Type: Oral storage site noise level energy conservation geophysics seismic monitoring injection well aquistore co 2 noise vsp data amplitude anomaly deadwood formation annual meeting repeatability...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216126
... unconventionally and processed as a sparse 3D volume. Despite low fold, the pseudo-3D successfully imaged the geological structure in the area, as supported by geological mapping and magnetic data. VSP data from the area is additionally analyzed and shows a potential relationship between Poisson’s ratio...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998132
..., 2018 Start Time: 8:30:00 AM Location: 212A (Anaheim Convention Center) Presentation Type: Oral reflectivity upstream oil & gas algorithm verschuur borehole reservoir characterization wavefield imaging inversion velocity model vsp data seismic imaging geophysics annual...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998435
... ABSTRACT Vertical seismic profile (VSP) data can be transformed to surface seismic profile (SSP) data by the correlation type seismic interferometry. It can increase the subsurface illumination compared to the VSP data. But the redatumed virtual shot often suffers from truncation artifacts...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998494
... ABSTRACT A high resolution reverse time migrated volume was formed using 3D Vertical Seismic Profile (3D VSP) data acquired over a carbonate reservoir in an oilfield offshore Abu Dhabi, United Arab Emirates. The migrated volume was used for the extraction of faults and fractures. After removal...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995905
... hydrocarbon. Presentation Date: Tuesday, October 16, 2018 Start Time: 8:30:00 AM Location: 210A (Anaheim Convention Center) Presentation Type: Oral frequency seismic data peak frequency wavelet vsp data seg international exposition time migration gather estimation method field data...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995929
... root of the stacking number. The data quality was comparable with dynamite – DAS VSP data in the same field. Reservoir reflectors at ~3250 m depth between the source and the DAS well were imaged by applying reverse time migration (RTM). The resulting image has high correlation with a synthetic...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996742
... to reconstruct wavefield components caused by vertical interfaces. We present a new way to incorporate VSP data into the Marchenko method that produces accurate subsurface images, even of vertical interfaces. Presentation Date: Wednesday, October 17, 2018 Start Time: 1:50:00 PM Location: 211A (Anaheim...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996933
... acoustic sensing (DAS) fibre already in place. This paper simulates synthetic data to find optimal offsets between continuous source locations and observation wells and compares VSP data acquired with DAS fibre and geophones at offsets comparable to proposed locations of the continuous sources...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997036
...:00 AM Location: 212A (Anaheim Convention Center) Presentation Type: Oral attenuation factor annual meeting geophysics coal seam cooper basin media inelasticity heterogeneity attenuation qscat vsp data seg international exposition nephrite-8 borehole seismic wave waveform...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17430569
... with vertical geophones, and preserved in seismic data libraries for a number of years before SV-P data processing is initiated. These data can be either surface-recorded data or VSP data. In the case of VSP data, the SV-P mode is embedded in the same rotated-geophone response that is used to create a P-P image...

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