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Keywords: reflection wave
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Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-W06-04
.... initial model geophysics inversion zheng upstream oil & gas chinese academy waveform inversion exploration geophysicist 10 perturbation crosstalk fréchet derivative reservoir characterization reflection seg international exposition reflection wave gradient velocity model full waveform...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3422285
... noise attenuation results in the conical Radon transform domain. Presentation Date: Tuesday, October 13, 2020 Session Start Time: 1:50 PM Presentation Time: 1:50 PM Location: Poster Station 13 Presentation Type: Poster reservoir characterization seismic data time slice reflection wave...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427448
... Diffracted arrivals are more sensitive to local heterogeneity than conventional reflections. However, the diffracted waves are usually buried in the reflection wave train, which makes them difficult to utilize. To address this challenge, we propose a workflow to separate the diffracted waves...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3427168
... and quantitative compensation based on reflection wave is proposed. Firstly, the reflection wave in the specified time window is used to calculate the centroid frequency of source and receiver points. Next, after offset correction, combined with the surface travel time, the frequency shift method is used...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215324
.... Presentation Date: Tuesday, September 17, 2019 Session Start Time: 1:50 PM Presentation Start Time: 3:05 PM Location: Poster Station 12 Presentation Type: Poster workflow radon transform conglomerate reservoir reflection wave seg international exposition parabolic radon transform mahu area...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3214891
... ABSTRACT Impedance is an important physical parameter, which plays an important role in the data processing and interpretation of seismic exploration. According to the relationship of seismic wavelength and the size of inhomogeneous body, we derived the reflection wave equation based...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0607
... to incorporate reflection arrivals into the WET to provide more constraints. The use of reflection wave in the FWI to retrieve long wavelength structure has been proposed to reduce the nonlinearity of the FWI (Clement et al., 2001; Plessix et al., 1999; Xu et al., 2012). Model parameters need to be separated...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0878
... of these wave equations. For further discussions, we start with the acoustic wave equation * div ( )+ ( ) where represents the bulk modulus, is the density. With the assumption that density variations are seldom the main source of reflected waves, we tend to neglect the derivatives of the density. As a result...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0014
... simulating the radiation and reflection of the wavefield generated by the borehole dipole source and analyzing the receiving sensitivity of the dipole system to the incoming reflection waves. The analyses show that a borehole dipole source can radiate a compressional wave ( P wave) and two types of shear...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-1181
... pattern detection parameter vector reflection wave hyperbola vfsa seismic pattern detection system Seismic pattern detection using very fast simulated annealing Kou-Yuan Huang* and Yueh-Hsun Hsieh, National Chiao Tung University Summary We use three global optimization methods in the seismic...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-2705
... in the velocity model. To reduce this nonlinearity, we present a reflection traveltime tomography method based on the wave equation which enjoys a more quasi-linear relationship between the model and the data. A local crosscorrelation of the windowed downgoing direct wave and the upgoing reflection wave...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-0869
... of reflection wave in the simulated one-shot seismogram and the real seismic data. The results of seismic pattern detection can improve seismic interpretation and further seismic data processing. Introduction Usually Hough transform (HT) was used to detect patterns in image. But it needed huge...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-2285
... ABSTRACT Neural network can determine the parameters of line and hyperbola. So it is adopted to detect line pattern of direct wave and hyperbola pattern of reflection wave in a seismogram. The distance calculation from point to hyperbola is calculated from the time difference. This calculation...
Proceedings Papers

Paper presented at the 2006 SEG Annual Meeting, October 1–6, 2006
Paper Number: SEG-2006-0339
... separation is first applied to array data to separate the direct and reflection waves. In particular, we use a transmitter array gathered from successive source positions to maximize the moveout difference for the up-going reflection. The reflection data can also be enhanced by stacking the data along...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1513
... velocity amplitude heavy oil frequency viscosity reflection wave fluid dhi annual report shear velocity upstream oil & gas attenuation transducer accuracy impedance relative error buffer 1Measurement of shear wave velocity of heavy oil De-hua Han, Jiajin Liu, University of Houston...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1717
... equation reflection time reservoir characterization media seg houston 2005 upstream oil & gas inversion reflection wave cmp gather absorption equation relative error crooked ray path equation ray path straight ray path approximate absorption equation Interval Q Inversion from CMP...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1721
... ABSTRACT Based on attenuation equation with high accuracy, interval inversion method is developed by using main frequency of reflection wave from CMP records. This method adopts Ricker wavelet to describe seismic wavelet and to calculate main frequency of reflection wave, utilizes multiple...
Proceedings Papers

Paper presented at the 2002 SEG Annual Meeting, October 6–11, 2002
Paper Number: SEG-2002-1622
... the seismic signal from the reflectors ahead of the tunnel face; 2) Detect the direction of incidence of the reflected wave; and 3) By weighting according to the direction of incidence of the reflected wave, image the reflector planes using the equi-travel time plane. The proposed technique is applied...
Proceedings Papers

Paper presented at the 1995 SEG Annual Meeting, October 8–13, 1995
Paper Number: SEG-1995-0329
... ABSTRACT No preview is available for this paper. reflection wave artificial intelligence wavelet phase spectra spectra upstream oil & gas comperative analysis machine learning correlation measure identification university reservoir characterization determination dan...
Proceedings Papers

Paper presented at the 1994 SEG Annual Meeting, October 23–28, 1994
Paper Number: SEG-1994-1171
... ABSTRACT No preview is available for this paper. media frequency range reservoir layer porosity transmission curve numerical simulation propagation upstream oil & gas displacement receiver elastic media reservoir parameter reflection wave reservoir characterization...

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