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Keywords: direct arrival
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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-2021-3579752
... of the reflected records using the F K velocity filter. The down-going and one is approximately 1km in EW and NS directions. The up-going phases correspond to the direct arrivals and thickness of the zone is less than 200m. reflected arrivals, respectively. The direct P-wave arrivals (down-going arrivals...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583604
... We present the results of applying a novel inversion approach to simultaneously estimate acquisition-related errors associated with a sparse ocean bottom nodes survey in the Gulf of Mexico. The travel times of the direct arrivals are picked and input to an inversion-based method to compute...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584157
... the linear moveouts (LMO) of the direct arrivals probabilities, we can correct the geometry errors and is coupled with estimating errors of acquisition geometry on reconstruct the surface velocity distribution, latter may be land. If the recording geometry in trace header is incorrect, used as a constraint...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425221
... and improve real-time decision-making. Presentation Date: Monday, October 12, 2020 Session Start Time: 1:50 PM Presentation Time: 3:55 PM Location: Poster Station 2 Presentation Type: Poster real time system checkshot direct arrival seg international exposition upstream oil & gas...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428055
..., October 13, 2020 Session Start Time: 1:50 PM Presentation Time: 1:50 PM Location: 351D Presentation Type: Oral vertical seismic profile imaging expanded abstract boundary salt boundary salt model mateeva direct arrival salt flank upstream oil & gas wavefield velocity model seg...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215742
... ocean bottom array real time system receiver seismic data reservoir characterization annual meeting drill-bit signal pilot signal upstream oil & gas direct arrival correlation drill bit velocity profile seg international exposition Poletto , F. , and F. , Miranda...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216451
... ABSTRACT Direct wave arrivals are the most robust signals to determine velocity and consequently they have been used for almost a century in hydrocarbon exploration. The reason is simple as the arrival time is explicitly available. In order to acquire these direct arrivals in a seismic...
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 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2983282
... reservoir simulation water content ground-penetrating radar resource in place estimate boundary direct arrival gpr data tree trunk reservoir characterization Imaging changes in moisture within living tree trunks using ground-penetrating radar Adam R. Mangel* and John H. Bradford, Department...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998629
... with different iterations, providing insight into the actual scattering process. Presentation Date: Thursday, October 18, 2018 Start Time: 8:30:00 AM Location: 211A (Anaheim Convention Center) Presentation Type: Oral hammad delft university direct arrival neumann iteration diving wave modeling...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996253
... information blended data upstream oil & gas direct arrival seg international exposition spectra overlap horizontal component pattern-based approach noise separation separation simultaneous source Abma , R. , D. Howe , M. Foster , I. Ahmed , M. Tanis...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996789
... in this setting. Firstly we focus on retrieving the direct arrival and primary signals from shallow reflectors which are responsible for the majority of the cross-talk noise, following which we address weaker reflectors. In addition, each iteration of signal estimation is followed by three-dimensional joint low...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13961763
... and the zero-offset VSP at the GC723 well location. (B) Traveltime misfits The use of checkshot and Z0_VSP information is good practice to validate models; however, it is restricted to the neighborhoods of the well locations. The more global 3D VSP evaluation is based on the direct arrival times measured...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13685251
... Presentation Type: ORAL acquisition annual meeting record length extension amplitude noise dataset shot record seg seg international exposition reservoir characterization separation overlap permian marker direct arrival dolphin geophysical upstream oil & gas maraschini time gap...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13846118
..., 2016 Start Time: 2:15:00 PM Location: 148 Presentation Type: ORAL frequency ziolkowski high frequency noise reservoir characterization noise conventional airgun pressure perturbation upstream oil & gas direct arrival seg seg international exposition airgun numerical modeling...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13875683
... ABSTRACT We found that the direct arrival has "great relation" to the signal-to-blending noise ratio (S/N) during the deblending of simulated and real simultaneous source dataset. In this paper, the influence of direct arrival was presented, and a new method to attenuate the direct arrival...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13952514
... modeling angle error reorientation receiver velocity error amplitude velocity model upstream oil & gas workflow synthetic data reservoir characterization random noise noise annual international meeting annual meeting direct arrival Armstrong , P. , 2009 , Model-based...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5919420
... Summary In this paper, we show that the location of microseismic events can be significantly improved by incorporating information on head wave arrival time. The traditional method of using direct arrival times and P-wave polarizations leads to increased error due to the large uncertainty...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5915542
... of three different methods full waveform inversion (FWI), travel-time delay (TTD), and reflected wave amplitude ratio. Results from simulation indicate that waveform contrast due to injection is minor, further complicated by attenuation. Conversely, TTD for direct arrivals and amplitude ratio show...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5749603
... that are used to illuminate the reservoir. The correlation between repeatability of these early arrivals and deep reflection data were reported in a previous study (Bakulin et al., 2014). Here we make use of this relationship and design a rejection scheme based purely on the pre-stack direct arrival NRMS...

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