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Keywords: receiver wavefield
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3424632
... The cross-correlation imaging condition requires that the source and receiver wavefields should be synchronously available. Opposite propagation directions of those wavefields, nevertheless, pose a challenge between computer memory and computation complexity. We present a local cross-correlation...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3425548
... computational efficiency by outputting sparse angle bins and by avoiding wavenumber-domain convolution. The method first decomposes source and receiver wavefields based on propagation directions, and then cross-correlates the decomposed wavefields. The more finely we decompose the wavefields, the higher...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3421796
... stack rtm image diving wave reservoir characterization shot gather wavefield exploration geophysicist 10 low wavenumber noise laplacian saudi arabia government receiver wavefield expec advanced research center seg international exposition Damped Laplacian for Reverse Time Migration post...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214913
... images, where high velocity contrasts/gradients in the velocity model produce reflections of the source and receiver wavefields. It has been proven that separating RTM images into different components based on propagation directions of the source and receiver wavefields is able to effectively remove...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215706
... structure wave equation wavefield migration upstream oil & gas stained time receiver wavefield algorithm elastic wave imaging seg international exposition geophysics propagation reservoir characterization seismic modeling jia imaging Chen , B. , and X. , Jia , 2014 , Staining...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215538
...-space domain reverse time migration seg international exposition upstream oil & gas artificial intelligence viscous absorption effect migration wavefield annual meeting reservoir characterization equation wave equation receiver wavefield stable compensation operator frequency-space...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215784
...) as receiver wavefields, multiplies receiver wavefields between all groups, and applies a causal integration over time to obtain a source evolution image. Using field data examples, we demonstrate the capability of the HyM-TRI technique to image the spatio-temporal sequence of asynchronous microseismic events...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2991159
... ways. The indirect method was proposed by Sava and Fomel (2003) where they introduce an extended image condition to form the subsurface offset CIGs. The direct way of creating RTM ADCIGs is to decompose the wavefield into local directional components for both source and receiver wavefields. Applying...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2970575
..., to construct the background velocity, which in turn can be used in a high-resolution inversion. However, there are major issues with time-domain RWI. First, RWI is sensitive to the way the wave equation is treated when computing source and receiver wavefields needed to compute the RWI gradient. Second, RWI...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2974332
... source and receiver wavefields are analytical functions, we first separate up- and down-going wavefields and then apply a causal cross-correlation imaging condition to compute reflectivity images. Presentation Date: Monday, October 15, 2018 Start Time: 1:50:00 PM Location: 205A (Anaheim Convention...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17735805
... and the corresponding excitation time for each subsurface image point during source wavefields extrapolation, which is equivalent to the excitation amplitude imaging condition for zero phase source wavelet. Next, we perform a direction-preserved zero-lag autocorrelation on the extrapolated receiver wavefields. Finally...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13879599
... ABSTRACT Because receiver wavefields from observed data are not as stable as source wavefields, the source direction and the reflector normal have been used to calculate angle-domain common-image gathers (ADCIGs) from reverse time migration (RTM), but has three limitations: 1) The existing...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13843281
... crosscorrelating the stained wave- field and the receiver wavefield to obtain the image of target area (i.e., stained image). Since the crosscorrelation imaging condition implies that the stained and receiver wavefields should be synchronously available at the same time, it will need extensive memory to apply...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13854721
... imaging condition of the corresponding components of source and receiver wavefields, the cross-talk between P- and S-wave will be generated. So, P- and S-wave separation is a vital step for elastic RTM. Most elastic RTM use divergence and curl operators to decompose P- and S-wave. Those separated...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5829692
... migration, one-way WEM extrapolates the down-going wavefield (the source wavefield) and the up-going wavefield (the receiver wavefield) depth slice by depth slice for each frequency component. The operator for extrapolating the up-going wavefield is the complex conjugate of the down-going operator so...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5911390
... receiver wavefield reservoir characterization migration result migration A new method of multiple reverse time migration based on different-order multiple separation Zhina Li*, Zhenchun Li, Peng Wang, China University of Petroleum (huadong). Summary At present, most commonly used multiple imaging...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5932246
... receiver wavefield regularization term regularization parameter extrapolate seg wavefield rtm attenuation reservoir characterization variational region compensate viscoacoustic wave equation annual international meeting compensation propagation time migration upstream oil & gas...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5880003
... together with a synthetic wavelet and use the recorded data as receiver wavefield was proposed, which can avoid the necessity of multiple separation. However, an incorrect wavelet will harmfully affect the accuracy of migration result, besides, serious crosstalk will be caused by the cross-correlation...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5860487
... by crosscorrelating downgoing S-waves in source wavefields and reflections associated with downgoing P-waves in receiver wavefields. The phenomenon similar to latter drawback has been reported by only a few studies (Deng and McMechan, 2008; Shabelansky et al., 2012). In this paper, we show the effects...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0454
... migration artifact receiver wavefield vector multipath imaging reservoir characterization reflection angle sdwd propagation direction Combining source direction vectors with wavefield decomposition to calculate angle gathers from reverse time migration Chen Tang*, University of Texas at Dallas...

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