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The velocity spectrum

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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215641
...Effect of Pore Aspect Ratio Spectrum on Ultrasonic Velocities of Tight Sandstones Saturated with Different Fluids Xu Han*, Genyang Tang, Yanxiao He, Chunhui Dong, Min Li and Shangxu Wang, China University of Petroleum (Beijing) Summary Compared to the high porosity and high permeability sandstones...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2013
Paper Number: IPTC-17187-MS
... events can't be identified. There are more picking velocity errors of shallow layers in continental piedmont zone. The main reason is that piedmont lithology and the velocity of shallow layers is various in transverse and longitude. At the same time, the precision of the velocity spectrum is affected by...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997330
... . Optimizing velocity model building for modern 2D programs in frontier areas Doing more with less Milos Cvetkovic*, Chris Benson, Cesar Arias, Laurie Geiger, Paolo Esestime, Leandro Gabioli and Laura Younker, Spectrum Geo Inc. Summary As the seismic industry redefines itself, modern 2D exploration programs...
Proceedings Papers

Paper presented at the SPWLA 49th Annual Logging Symposium, May 25–28, 2008
Paper Number: SPWLA-2008-GGG
... resolve effects due to heterogeneity in mineralogy and heterogeneity in pore geometry (sorting, compaction, cementation, etc). The approach presented in this paper is based on the predictions of NMR T 2 spectrum and acoustic velocities in numerical model rocks having different grain size distribution...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17039568
... reservoir sand in order to estimate the in place oil reserve associated with the discovery wells, interbedded thin sand interpretation technique was built through spectrum decomposition modeling and analysis. Four stratigraphic 2D channel filled sand models were built by integrating the P-velocity and the...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2995563
... ABSTRACT Obtaining good quality seismic images requires reasonably flat gathers for stacking after normal moveout correction. Hence, an accurate velocity model is necessary. In this paper, we present the application of cross-correlation of near- and far-angle stacks as a quality indicator for...
Journal Articles
Journal of Ship Research 62 (03): 166–182.
Paper Number: SNAME-JSR-2018-62-3-166
Published: 01 September 2018
... such a way that each blade encounters with low-velocity flow in time. 5. Spectrum Investigation of CRP system The generic vehicle body with a 5-m length was supposed to be propelled by a CRP. The vehicle speed was 15.42 m/sec, whereas the CRP with 7-bladed forward and 5-bladed aft propeller was...
Proceedings Papers

Paper presented at the SPE Reservoir Characterisation and Simulation Conference and Exhibition, May 8–10, 2017
Paper Number: SPE-186048-MS
... good continuity and high amplitude; reservoir B is different--some have good continuity and mid-high amplitude, and others have poor continuity and low-mid amplitude; reservoir C has poor continuity and low-mid amplitude.Reservoir A has the characteristics of low velocity and density, and is different...
Proceedings Papers

Paper presented at the 1996 SEG Annual Meeting, November 10–15, 1996
Paper Number: SEG-1996-0146
... transform borehole scalogram sonic log heterogeneity application upstream oil & gas spectrum representation BG 2.8 Wavelet power spectrum representation of seismic velocity heterogeneities Xiao-Ping Li, University of Karlsruhe, Germany Summary The continuous wavelet transform (CWT) is used to...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-0588
... stack section, we note the noise is removed partially, but the lateral velocity variation is significant and structure for basement is vague. Figure 4 displays a common imaging gather (CIG) associated with the velocity spectrum, we note that multiples are still strong in CIG though the multiples are...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5857767
... first layer Q and the spectrum ratio matrix method can estimate the accurate multilayer Q curve. This spectrum ratio matrix method can be abbreviated to SRM. 2 ( ) miny T K , (3) Table1: the model parameters. Thickness(m) Velocity(m/s) Q 100 600 4 100 1000 13 100 1200 20 100 1500 31 100 2000 60 0...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998449
.... In this study, we aim to further understand the lithospheric magnetic structure, thermal activity, and seismicity through mapping the Curie point depth (CPD) for Guangxi. The CPD are obtained by the method of power-density spectrum analysis based on the aeromagnetic anomaly data. Results of this...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216231
... with the smallest variance. In the figure on the right, hyperbolas are constructed using different velocities. The vector with the smallest variance passes through the hyperbolic event corresponding to the velocity . Singular spectrum analysis in hyperbolic windows Combination of the methods based on...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5924518
... fold Common Mid Point (CMP) gathers for velocity analysis and restock imaging. This paper proposes applying interpolation to ground-penetrating radar (GPR) data; the method applied here is called Singu- lar Spectrum Analysis (SSA), and it s anti-alias modification to reconstruct multi-offset GPR...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-1966
... wavefield could not overcome the problem that a solution to the misfit function may converge to a local minimum if the initial model for the inversion is not close to the true velocity structure. Wavefields with small power-spectrum values only slightly affect inversion results in conventional frequency...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-395
... respect to the ADCP beam. Using the SDDWM, along-beam velocity profiles are sampled at each depth and mean currents are derived. We can also resolve the directional properties of ocean surface waves, such as the wave directional spectrum, using a cross-spectral array with the directional analysis methods...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0277
... imaging point upstream oil & gas seismic imaging result reservoir characterization effective bandwidth imaging result imaging resolution noise diffraction point Application of the spectrum analysis method in the design and optimization of geometry Xia Jianjun*, Tang Donglei, Zhao Xiaohui...
Proceedings Papers

Paper presented at the Offshore Mediterranean Conference and Exhibition, March 23–25, 2011
Paper Number: OMC-2011-115
... Programmable Gate Array (FPGA) which provides local signal-processing capability to filter and integrate the acceleration signal, compute the frequency spectrum, identify the maximum vibration velocity and the corresponding dominant frequency as required by the DIN 4150-3 standard [1]. The velocity spectrum is...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17640133
... characterize reservoirs. Currently, the centroid frequency shifting of amplitude spectrum (CFS) method is a widely used Q estimation approach. However, the assumption of Gaussian, boxcar, or triangular shapes of the amplitude spectrum for CFS will cause systematic error for Q estimation. Moreover the amplitude...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13871026
... Spectrum Analysis (TSSSA) based de-noising as a pre-filtering for seismic inversion using a hybrid of Particle Swarm Optimization and Gravitational Search Algorithm (PSOGSA). We tested the performance of a hybrid PSOGSA based inversion on pure synthetic data, synthetic data with 30% added and its TSSSA de...

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