Application of Visco-Acoustic Full Waveform Inversion to Shallow-Water, Shallow-Gas Data, #41802 (2016).

Xin Cheng, Ronan Petton, Ian Anstey, Wai-Leong Lai, Denes Vigh, Gavin Menzel-Jones

Search and Discovery.com

... velocity model. Even with a simple background Q-model, a detailed velocity model can be retrieved using this approximate, phase-only, visco-acoustic...

Low-frequency data reconstruction for full-waveform inversion

Ramzi Djebbi, Maiza Bekara, Jaime Ramos-Martinez, Nizar Chemingui

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Introduction Full waveform inversion (FWI) aims to recover a highresolution velocity model using least-squares minimization of the difference between field...

Simultaneous inversion of velocity and angle-dependent reflectivity

Nizar Chemingui, Yang Yang, Jaime Ramos-Martinez, Guanghui Huang, Dan Whitmore, Sean Crawley, Elena Klochikhina, Sriram Arasanipalai

International Meeting for Applied Geoscience and Energy (IMAGE)

... directly generated and updated at each iteration using the updated velocity and reflectivity fields, without the need for additional migrations...

Abstract: Estimation of Group Velocity using Slant Stack Generalized S Transform Based Method; #90174 (2014)

Roohollah Askari, Robert J. Ferguson, and Kristof DeMeersman

Search and Discovery.com

...Abstract: Estimation of Group Velocity using Slant Stack Generalized S Transform Based Method; #90174 (2014) Roohollah Askari, Robert J. Ferguson...

Abstract: Tomography of a Velocity Modeland Location of Microseismic Events with P, Sv and Sh Waves; #90224 (2015)

Malgorzata Chmiel and Thomas Bardainne

Search and Discovery.com

... time-based cost function using a subset of 13 strongest microseismic events. The relationship between travel times and distance is non-linear...

Abstracts: Full Waveform Inversion Using One-way Migration and Well Calibration; #90173 (2015)

Gary F. Margrave, Robert J. Ferguson, and Chad M. Hogan

Search and Discovery.com

... geophysicists. For clarity, we present the central theoretical result behind FWI as a mathematical theorem stating that a linear update to a migration velocity...

Geological Factors Influencing Porosity Estimates From Velocity Logs

Roberto Sarmiento

AAPG Bulletin

.... 216, p. 262-270, T.P. 8085. Faust, L. Y., 1951, Seismic velocity as a function of depth and geological time: Geophysics, v. 16, no. 2, p. 192-206...

Minimizing Depth Uncertainties Through Effective Seismic Processing Strategies in a Complex Geological Setting - Unlocking Deeper Potentials Offshore Indonesia

M Afiq B Mokhtar, Riaz Alai, Yonghe Guo, Pongga Wardaya, Jun Wang, Rizki Krishna Pratama, Haryono Haryanto

Indonesian Petroleum Association

... seismic sections using intermediate velocities such as single velocity function obtained from existing wells or smoothed velocity picked in time...

Characterization of a Sediment Core from Potential Gas-hydrate-bearing Reservoirs in the Sagavanirktok, Prince Creek, and Schrader Bluff Formations of Alaska's North Slope: Part 5Acoustic Velocity Core Studies

R. F. Sigal, C. Rai, C. Sondergeld, B. Spears, W. J. Ebanks Jr., W. D. Zogg, N. Emery, G. McCardle, R. Schweizer, W. G. McLeod, J. Van Eerde

AAPG Special Volumes

... velocity data is found in Chapter 29 Datashare Table 1.Figure 1 shows the compressional and both measured shear velocities as a function of depth...

Advances in Depth Imaging Technology: Rock Physics Guided Migration of Seismic Data in 3D

Nader C. Dutta, Sherman Yang, Jianchun Dai

Indonesian Petroleum Association

... are then applied as a guide function to build the final velocity model. Using a tomographic approach and input to a chosen migration algorithm, the process can...

Velocity-depth trends in Mesozoic and Cenozoic sediments from the Norwegian Shelf: Reply

Vidar Storvoll, Knut Bjrlykke, Nazmul H. Mondol

AAPG Bulletin

... et al., 2005). Japsen (2006), however, argues that compaction of shales can be represented by a linear velocity-depth trend as a function...

ABSTRACT: Accurate Depth Conversions Reduce Risk, by L. C. Luton and C. Prieto; #90908 (2000)

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Abstract: Estimation of Q-factor and Phase Velocity Using the Recovered Stress-strain Relaxation Spectrum; #90172 (2014)

Dali Zhang, Michael P. Lamoureux, Gary F. Margrave

Search and Discovery.com

...Abstract: Estimation of Q-factor and Phase Velocity Using the Recovered Stress-strain Relaxation Spectrum; #90172 (2014) Dali Zhang, Michael P...

Depth conversion and seismic inversion of the Scarborough gas field

Joseph Kremor, Manish Agarwal, Paul Spaans, Ung Sing Wong

Petroleum Exploration Society of Australia (PESA)

... in depth with the depth converted seismic using the velocity model, which was generated using the smoothed 30 Hz FWI model. The ties to the wells were...

Abstract: Case Study of the Effect of Grid-Search Objective Function in Microseismic Source Location; #90255 (2017)

Luolan Li, Yuyang Tan, Chuan He, Pan Deng

Search and Discovery.com

... of the receiver arrays, the accuracy of the arrival picks and the velocity model. However, the choice of the objective function in grid-search algorithm...

Mitigating cycle skipping in FWI through preconditioned multidimensional optimal transport

James McLeman, Tim Burgess, Tom Rayment, Victor Chua

International Meeting for Applied Geoscience and Energy (IMAGE)

... and space respectively. This linear programming problem can be discretized and iteratively solved using the SDMM optimization technique (Métivier et al...

Marchenko focusing using convolutional neural networks

Mert S. R. Kiraz, Roel Snieder

International Meeting for Applied Geoscience and Energy (IMAGE)

... Green’s function at an arbitrary depth location in a complicated medium with variable velocity, and variable density profiles. Using CNNs, we relax...

Porosity-Velocity Distribution in Stratigraphic Sequences: The Marion-Yin Model, by Juan Florez and Gary Mavko, #40105 (2003).

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Uncertainty quantification of anisotropic elastic constants and mud speed using borehole sonic data

Ting Lei, Kristoffer Walker, Adam Donald, Alexei Bolshakov, Lin Liang, Romain Prioul, Edgar Ignacio Velez Arteaga

International Meeting for Applied Geoscience and Energy (IMAGE)

... is correctly determined. There is minor sensitivity to 𝜀, and no sensitivity to 𝛿. using a linear profile yields biased inversion...

Seismic Applications of the Velocity Log

W. G. Rimmer

CSPG Bulletin

... the same basic idea. The velocity log is scanned and converted to a linear time scale vertically plotted against a logarithmic function...

Abstract: Velocity Problems not Related with Thrusting or Salt Tectonics, by O. Ferraris, A. Salinas, M. Koremblit, and D. Soubies; #90933 (1998).

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Chapter 9: Application of the IER Strategy for Natural Gas Exploration

Ronald C. Surdam, Zun S. Jiao

Montana Geological Society

.... According to the conceptual model developed by D3R, this slow velocity band is a function of a free gas phase in the fluid system (e.g., "gas...

Time-Depth Modeling in High Pore-Pressure Environment, Offshore East Coast of India; #30463 (2016)

Nidhi Jindal, Ajoy Kumar Biswal, Kumar Hemant Singh

Search and Discovery.com

... tested on four models: a) the linear interval velocity model in depth, b) the linear interval velocity model in time (TWT), c) the average velocity model...

Stabilizing two-term clock-drift inversion in ocean-bottom node processing

Beng Seong Ong, Zhaojun Liu, Carsten Udengaard

International Meeting for Applied Geoscience and Energy (IMAGE)

... for ocean-bottom nodes is usually modeled by two terms, a linear and a quadratic term. A global approach to invert for water velocity, node positions...

Impact of Velocity Field on AVA Analysis; #42363 (2019)

Ritesh Kumar Sharma, Satinder Chopra

Search and Discovery.com

... and is a function of only P-wave velocity and density. The second term B referred to as the gradient stack, has a dependence on P-wave velocity, S-wave velocity...