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Model building

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Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-0691
... ABSTRACT No preview is available for this paper. zechstein salt cip gather imaging upstream oil & gas southern gas basin sparse set prestack depth migration coherency inversion procedure interval velocity model model building procedure velocity model tomography velocity...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13962527
... ABSTRACT We present the potential of broadband marine Controlled Source Electromagnetics (CSEM) coupled with a Resistivity-to-Velocity transform workflow as a cost-effective starting model building for Full Waveform Inversion (FWI) to improve complex subsalt and around salt imaging. The novel...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5659-MS
... logging artificial intelligence seismic data neural network information impedance log analysis upstream oil & gas midland basin central basin platform prediction earth model building neuron training data mlp permian basin basin well location automated machine learning framework...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3416120
... We studied applying Full Waveform Inversion (FWI) and Least Squares Reverse Time Migration (LSRTM) on a marine seismic data set for building 3D velocity models. The data set is acquired in Saudi Arabia from a 3D Ocean Bottom Node (OBN) survey with very large offsets and considerable low...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3419180
... than P-data. However, it is always a challenging task to build a velocity model incorporating PP- and PS-wave propagation. Traditionally PP-PS velocity model building has been performed in step-wise approach. Starting with obtaining a robust PP velocity and anisotropy and then using this information...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3419351
... definition orphan basin example tiago alcantara seg international exposition least-square imaging offshore canada exploration geophysicist 10 inversion valenciano data-domain lsm velocity model offshore canada reflectivity High-resolution velocity model building and least-squares imaging...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3420043
.... A decision was, therefore, made to acquire the survey with three distinct azimuths line headings of 142°, 322°, and 52° to fully illuminate the complex ridge structure. Herein, we detail the carefully constructed earth model building flow to fully leverage the advantages of multi-azimuth acquisition...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3422081
..., has become one of the essential tools for earth model building. However, its use in the salt tectonic contexts, especially with streamer data collection limited because the frequencies and the offsets are not low and long enough. With contemporary ocean-bottom node (OBN) acquisition, one can have long...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425489
... rtm angle gather tomography depth model building reflector kazakhstan A pilot project consisting of depth model building and depth migration was performed in 2018 for the Tengiz field onshore Kazakhstan. The pilot focused on image improvement of a subset of the 2009 3D survey where several...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428324
... Velocity model building is not straightforward in geologically complex environments. We train a convolutional neural network (CNN) to map full wavefields to smooth subsurface parameter distributions to address the problem. Specifically, cubes of neighboring CMP gathers are mapped into in 1D...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427022
... We show an automatic workflow that builds the subsurface velocity model from common midpoint (CMP) gathers with or without well velocity control. The workflow includes automatic normal moveout (NMO) semblance picking, horizon picking, and well velocity constraining. We achieve the automation...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424666
... Near-surface velocity model building is an key problem for subsequent seismic imaging and waveform inversion. Based on a unified seismic wave forward engine, a new first arrival multi-information joint inversion method is proposed to cope with this problem. In our joint inversion method, the...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428375
... and reworking exploration-style wide-azimuth towed-streamer surveys is often the preferred option. A creative and more holistic approach to model building must be adopted to overcome difficulties introduced by the complex subsurface geology. A data-driven integrated earth model building workflow was...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428385
... quasi-geology model Characterizing a Precambrian intrusive complex by integrating potential eld data into 3D quasi- geology model building Jiajia Sun1, Aline Melo2, Jae Deok Kim1 and Xiaolong Wei1 1Department of Earth and Atmospheric Sciences, University of Houston 2Universidade Federal de Minas...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428806
... Efficient acquisition of large-scale, azimuth-rich ocean bottom node (OBN) data, with long offsets and high fold is now a reality. Such data provide an opportunity to apply advnced model building techniques to derive high resolution velocity models. As offsets increase the risk increases of...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427836
... Velocity model building for seismic imaging is commonly performed with tomography and full wave inversion (FWI). Both techniques are time consuming and need significant human intervention. Machine learning has been introduced into seismic imaging with the goal of reproduce the success earned in...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427844
... upstream oil & gas exploration scale volcanic model building velocity fill volcanic geobody Challenges in exploration-scale volcanic geobody model-building in the Potiguar Basin, Brazil Rich Bartlett*, Andrew Woodcock, Samuel Winters, Joanna Szalas, Shearwater GeoServices; Mike Saunders, Randall...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428002
... broadband processing and imaging with integrated earth model building techniques in the Perdido Fold Belt Natalie Adelman, Jason Thekkekara, Nadxieli De La Rosa Perez, Briseida Palacios Perez, Marsella Kachingwe and Kate Glaccum, WesternGeco Summary spread of each survey are approximately 9.6 and 10.5 km...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427958
... We propose an approach for TTI velocity model building that utilizes the well mis-tie information as inversion constraints. We address two practical issues of the ray-based tomographic inversion: 1) Spatial sparsity of available wells and 2) Ray instability caused by high velocity contrast. We...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215175
.... , Chandrasekhar , F. , Dotiwala , and C. V. , Rao , 2014 , Earth-model building using rock physics and geology for depth imaging : The Leading Edge , 33 , 1136 – 1152 , doi: 10.1190/tle33101136.1 . Issler , D. R. , 1992 , A new approach to shale compaction and stratigraphic...

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