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Number of seismic sources

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Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2994516
... We compare the performance of two acoustic solvers in the framework of frequency-domain full-waveform inversion. Using a realistic 3D marine model, we conduct a series of numerical experiments varying the number of nodes and sources taken from a typical 3D seismic acquisition scenario. When the...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-2273
.... For time-domain and Krylov-based frequency-domain FWI, the cost of FWI is proportional to the number of seismic sources inverted. We have found that the cost of FWI can be significantly reduced by applying it to data processed by encoding and summing individual source gathers, and by changing the...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-3008
... the inversion in comparison with CC-based redatuming. Controlled-source seismic interferometry by multi-dimensional deconvolution Controlled-source seismic interferometry by multi-dimensional deconvolution: stability aspects with various numbers of sources and receivers Joost van der Neut*, Jürg...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1039
... SUMMARY We consider the discretization and solution of the 3D inhomogeneous Helmholtz equation on a large domain and for a large number of seismic sources in the context of 3D seismic imaging. We resort to a parsimonious mixed grid finite difference scheme and the perfect matched layer...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0066
... seismic data described here works with both instantaneous mixtures and convolutive mixtures. Furthermore, the mixtures can be undedetemined (i.e. the number of mixtures (K) is smaller than the number of seismic sources (I) associated with a multi-shot) or determined i.e. the number of mixtures is equal to...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5020
... function and coherence coh are then defined using = 2 + + 0 and (3) coh = M . (4) Here, represents the set of the receiver sensor azimuths and is the number of source-receiver offsets in the receiver array. Our implementation of 3D STC parameterizes 3D slowness in spherical coordinates...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17430461
... private reports written about these tests, to anyone who requests the information. These test data and research reports have already been distributed to 7 university groups who are interested in S-wave reflection seismology. There are a huge number of thesis research topics embedded in these test data...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 7–10, 2016
Paper Number: SPE-182869-MS
... new wells needed. Placing increased number of infill wells, while maintaining the proper reservoir management is a major challenge. In order to plan the wells in a way that maximizes the productivity and optimizes the economy; a study was conducted to analyse the density of the wells and the impact on...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214989
... mode Figure 5 Single channel offset plots for a) the decoded separated data, b) the difference from the non-decoded input data and c) the same difference but without any seismic interference removal. Conclusion The ability to fire a large number (six) of seismic sources almost at the same time and...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13959115
... to constrain the model space. We demonstrate that the proposed approach can effectively reduce the number of model parameters, leading to a rapid convergence rate using preconditioned conjugate-gradient iterations. The least-squares imaging of passive seismic sources can be further incorporated into...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, November 15–17, 2011
Paper Number: IPTC-14857-MS
... the seismic (acoustic) full-waveform inversions. By detecting and quantifying the extent of redundancy in the data, we assemble a reduced set of simul- taneous sources and receivers that are weighted sums of the physical sources and receivers employed in the survey. Because the number of these...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5869930
...Evaluating the sources of 4D noise through controlled experiments with synthetic seismic data Elizabeth L Heureux*, Mariana Gherasim, BP Summary We present a synthetic data study to investigate a number of causes of noise in time-lapse seismic experiments, including water velocity variations...
Proceedings Papers

Paper presented at the 54th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2020
Paper Number: ARMA-2020-1714
... which the majority of seismic energy is radiated. This analysis is achieved by, for each sensor, taking a large number of events, preferably over a range of distances and magnitudes, and comparing the ratio of the observed to the expected source spectral amplitudes. Measuring this makes it possible to...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17677817
.... It is impossible to tell a source signature vs. a Green s function with only one re- ceiver, so any method that hopes to lift the ambiguity necessarily requires two or more receivers and the number of receivers on a drill string cannot be large. Conventionally, independent component analysis (ICA...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17752002
... number of moles is determined from evaluating the ideal gas law at the surface, paVa = nQTa, where subscript a indicates atmospheric values. Impulsive Excitation A possible mechanism for sound generation in whales is an impulsive excitation of the lungs followed by decay with oscil- lations at the...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5928795
... waveform inversion. Currently the methods of acquiring long-offset wide- azimuth data is based on multiple source vessels shooting into a lesser number of vessels towing streamers. Source vessels are less expensive than vessels towing multi- streamers or carrying ROVs and ocean bottom nodes. So the economy...
Proceedings Papers

Paper presented at the The Fourteenth ISOPE Pacific/Asia Offshore Mechanics Symposium, November 22–25, 2020
Paper Number: ISOPE-P-20-203
... frozen and a large number of aquaculture products died, thus resulting in a direct economic loss of nearly ¥ 6.4 billion (Zou et al. 2011; SOA, 2010). Physical Mechanisms of Risk Sources and Classification of Risk Modes for Sea Ice Disasters on Marine Engineering Structures Ning Xu1, Shuai Yuan1...
Proceedings Papers

Paper presented at the SPE International Conference and Exhibition on Health, Safety, Security, Environment, and Social Responsibility, April 11–13, 2016
Paper Number: SPE-179201-MS
... acoustic power from an airgun source fired every 10 seconds is smaller or roughly the same as from the acoustic power of a jet engine (not "100,000 times as big"). One wonders where the "100,000" number came from. Was there a fundamental mistake in someone’s calculation? One example of an erroneous...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-3018
... factor proportional to N T To , where N is the number of re- ceivers, To is the dominant period of the source wavelet, 1RTM in an exact velocity model is equivalent to TRM and T is the total length of the events. Theory Imaging of seismic sources is equivalent to estimating the subsurface reflectivity...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition and Conference, November 1–4, 2010
Paper Number: SPE-137990-MS
...) the traditional shot records can be combed from the continuous dataset at any later stage. We have used the benefit of continuous recording to operate a large number of sources simultaneously on a large recording spread thereby greatly improving the productivity of land acquisition. In this method...

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