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Keywords: velocity estimation
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Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3746066
... of the wave equation operator is constructed from the data via a nonlinear process and is used for efficient velocity estimation. While the conventional FWI via nonlinear least-squares data fitting is challenging without low frequency information, and prone to getting stuck in local minima (cycle skipping...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584157
... survey geometry velocity estimation, the CNN architecture, and the data and derive surface velocity distribution from estimating preparation. Then we evaluate the performance of our LMOs. A convolutional neural network is trained with method for geometry corrections and surface velocity 2,100 samples...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3594936
... of survey decimation on velocity model OBN dataset designed to understand the effect of decimating building work ow, we use eld and synthetically derived data sources and receivers on velocity estimation. We use both syn- from an OBN survey shot in the Santos Basin, offshore Brazil. thetic and actual eld...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3410422
... level. and designing the Imaging Condition based on VDCIG (Erokhin et al., 2017). In this paper the high-resolution velocity estimation by RTH The second stage of the RTH approach is to synthesize an approach is proposed. It is shown that the image of the some attributes based on the parameters...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427964
...Near surface velocity estimation using the flatness of angle gathers without horizon Kwangjin Yoon*, Yi Luo, EXPEC Advanced Research Center, Saudi Aramco Summary 2) Set a time window and its depth version. 3) Perturb interval velocity within the depth window and Near surface velocity variations...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215501
... Start Time: 1:50 PM Presentation Time: 1:50 PM Location: Poster Station 4 Presentation Type: Poster high-resolution velocity estimation fwi reservoir characterization estimation waveform inversion upstream oil & gas velocity profile physical property seg international exposition...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216236
... reflectivity inversion upstream oil & gas seismic imaging geophysics information management velocity estimation berkhout reservoir characterization verschuur seg international exposition velocity model joint migration inversion fwi robust velocity estimation Berkhout , A. J...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216230
... a methodology for improving shear wave velocity estimation based upon the combination of classification plus regression using conventional logs. The approach applies in two phases. First, data classification algorithms are applied to build a classifier model for identifying the distinct electrofacies (EF) based...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-W21-06
...-wave velocity wave-equation dispersion spectrum inversion zhang velocity estimation upstream oil & gas spectrum reservoir characterization crosscorrelation virtual-shot gather geophysics noise ambient noise annual meeting seg international exposition inversion spectrum inversion...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3198045
... dispersion spectrum inversion crosscorrelation velocity estimation spectrum inversion inversion seg international exposition dispersion spectrum virtual-shot gather geophysics Al-Shuhail , A. A. , M. H. Alsaleh , and O. A. Sanuade , 2018 , Analysis of time-depth data...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3203782
... images, but also for ensuring the PS image well correlated to P-wave image. image gather shear wave velocity model building seg international exposition upstream oil & gas continuous seismic reservoir velocity estimation geophysics ps image target-oriented imaging approach workflow...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997208
... application annual international meeting nmo correction deep learning feedforward neural network rnn velocity estimation neuron reservoir characterization seg 10 An , P. , and W. M. Moon , 1993 , Reservoir characterization using feedforward neural networks : 63rd Annual...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998596
... ABSTRACT Accurate seismic velocity estimation is a crucial component of geophysical interpretation. Semblance analysis is an efficient tool to estimate seismic velocity but is often limited by uncertainty in the source wavelet shape as well as added complexity introduced by changes in velocity...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996550
... into different scattering angles. Small scattering angles correspond to forward scattering, which are caused by velocity perturbation, so small scattering angles are used only for velocity estimation. Large scattering angles are related to backward scattering, where the density plays important role, so...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17750212
... the gradient reliability. Presentation Date: Monday, September 25, 2017 Start Time: 3:55 PM Location: 371A Presentation Type: ORAL migration artifact reservoir characterization misfit function velocity estimation upstream oil & gas side gradient geophysics original gradient wave mode...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17632416
... and seismic waves : Springer Berlin Heidelberg Sun , Y. , 1992 , Source focusing inversion of cross well seismic data : Annual Tomography Report , University of Utah . Time reversal focusing for velocity estimation: cross-well acquisition Ariel Lellouch and Evgeny Landa*, Tel Aviv...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17657809
... with the encoded simultaneous source method : 73rd Conference and Exhibition, EAGE, Extended Abstracts, F032 , 10.3997/2214-4609.20149730 . Shen , X. , 2014 , Early arrival waveform inversion for near surface velocity estimation : Ph.D. thesis , Stanford University . Sheng , J...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17647817
... estimation upstream oil & gas fast time-to-depth conversion geophysics seg seg international exposition annual international meeting velocity estimation conversion lateral variation time-to-depth conversion image ray annual meeting time migration fomel migration reservoir...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13897898
.... However, the estimated velocity models are relatively smooth and lack detail, as they only describe the propagation of waves. Moreover, some improvement in JMI seems to be needed to generate rapid velocity variations like salt structures. In this paper we present a velocity estimation procedure including...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13951540
... and save substantial human costs. Presentation Date: Wednesday, October 19, 2016 Start Time: 3:35:00 PM Location: 143/149 Presentation Type: ORAL velocity spectra inversion result procedure reflection event reservoir characterization cmp gather velocity spectrum velocity estimation...
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