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Keywords: rtm
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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-2021-3594626
.... To demonstrate the superiority of the modeling with the mesh-free based RBF-FD method, we analyze its dispersion and stability. Finally, we implement the reverse time migration (RTM) on the topographic Marmousi model to demonstrate that the mesh-free RBF-FD method-based RTM is a viable imaging method for seismic...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428147
... Reverse time migration (RTM) is capable of imaging the underground structures even in complex geological conditions. However, RTM does not guarantee a migration result with accurate amplitude and high resolution. Therefore, Least-Squares RTM methods are developed to reduce migration artifacts...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425548
... All migration methods, including Reverse Time Migration (RTM), need a way to preserve prestack information for reflection tomography and performing quality control for velocity model building, improving structural imaging via illumination weighting, post-migration reprocessing (PMR...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427717
... Reverse time migration (RTM) has been the primary choice to obtain reliable seismic imaging in complex geological regions such as the Gulf of Mexico. Although the commercial application of RTM goes back over a decade, the pursuit for high-frequency images, ~50 Hz or greater, are still rare due...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214545
... ABSTRACT Angle domain common image gathers (ADCIGs) can be generated by reverse time migration (RTM). The kinematic moveouts are important for velocity model building, and the amplitude fidelity is crucial for attribute analysis. ADCIGs can be generated from conversion of time-shift or offset...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216654
... ABSTRACT We analyze the wavenumber sampling characteristics of decomposed RTM images through different schemes, including wavenumber-domain distribution of decomposed images, analytical analysis of model wavenumber vector, illumination-based imaging resolution function analysis etc. Based...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3206145
... ABSTRACT Reverse time migration (RTM) of multiples can be used to construct subsurface structures where primaries cannot illuminate well. However, the images suffer from severe artifacts due to the crosstalk noise created by interference among unrelated multiples. Liu et al. (2016) proposed...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215056
... ABSTRACT A modified inversion-based imaging condition is proposed to estimate acoustic impedance perturbations from near angle stacked images, based on the theory of amplitude preserving reverse time migration (RTM). The proposed imaging condition consists of multiplying the summation...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215565
... ABSTRACT Angle-domain common imaging gathers (ADCIGs) from reverse time migration (RTM) are essential for velocity updates and amplitude variation with angle inversions. However, the extraction of ADCIGs from RTM is still challenging in computational stability and efficiency. We develop...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215582
... ABSTRACT This paper presents a reverse time migration (RTM) method formulated as the transpose of the forward operator. For modeling, the wave equation solution is expressed by the rapid expansion method (REM). The REM is a wave equation solution method that is based on the Chebyshev expansion...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215583
... ABSTRACT Conventional shot-record reverse time migration (RTM) suffers from a high computational burden when dealing with massive data. The computational cost of RTM can be reduced by shot-encoding techniques, and plane-wave encoding is a commonly used and effective shot-encoding scheme...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215674
... ABSTRACT An efficient approach to better manipulate the wavefield domain associated with the seismic modeling, reverse time migration (RTM) and full waveform inversion (FWI) is proposed. This approach, which is called dynamic approach (DA), considers the variation of the computational...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216144
... on the application of wavefront attributes in depth imaging of complex subsurface data. A workflow will be presented that makes use of CRS partial stacking in order to create a dataset of regular shot and receiver locations for Reverse Time Migration (RTM). A hybrid approach to RTM depth model building...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216051
... ABSTRACT In this paper, we propose an improved asymptotic inversion based reverse time migration (RTM). The proposed method furtherly accounts for illumination compensation besides geometrical spreading correction as considered in conventional asymptotic inversion based RTM. The illumination...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216529
... ABSTRACT High-fidelity imaging of high-angle faults in the subsurface is a challenging topic in seismic imaging industry even if we were given the correct migration velocity and accurate reverse time migration (RTM) operator. Here, we show a simple modified RTM method to image the vertical...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997116
... Start Time: 1:50:00 PM Location: Poster Station 7 Presentation Type: Poster acquisition geometry seg international exposition diving wave illumination fwi bp america inc imaging acquisition parameter workflow reservoir characterization inversion annual meeting rtm analyze...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996971
... A cost-efficient controlled reverse time migration Zhen Xu*, Kun Jiao, Dong Sun, Xin Cheng and Denes Vigh, WesternGeco Summary Reverse time migration (RTM) is a very expensive depth imaging algorithm, particularly at high frequencies. The cost of RTM scales to the 4th power of the relative...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996390
... – 8462 , 10.1016/j.jcp.2010.07.027 . Whitmore , N. D. , and S. Crawley , 2012 , Applications of RTM inverse scattering imaging conditions : 82nd Annual International Meeting, SEG , Expanded Abstracts , 1 – 6 , 10.1190/segam2012-0779.1 . Whitmore , N. D...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997690
...Reverse-time migration with combined source-receiver illumination Hao Yang*, Wenge Liu, Feng Xu & Fan Wang, Southwest Petroleum University, Chengdu, China Summary Reverse-time migration (RTM) is an effective method of seismic imaging that has various advantages. One advantage is utilization...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17690460
... inversion rtm prestack waveform inversion migration reservoir characterization velocity model mallick Avseth , P. , T. Mukerji , and G. Mavko , 2005 , Quantitative seismic interpretation: Applying rock physics tools to reduce interpretation risk : Cambridge University...

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